US Patent Class 137
FLUID HANDLING




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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  PROCESSES
2  DF  .~ With control of flow by a condition or characteristic of a fluid
3  DF  .~.~ Mixing of plural fluids of diverse characteristics or conditions
4  DF  .~.~.~ Controlled by consistency of mixture
5  DF  .~.~.~ Controlled by conductivity of mixture
6  DF  .~.~.~ Controlled by heat of combustion of mixture
7  DF  .~.~.~ Controlled by pressure
8  DF  .~.~ For producing uniform flow
9  DF  .~.~ For producing proportionate flow
10  DF  .~.~ By speed of fluid
11  DF  .~.~ For regulating boiler feed water level
12  DF  .~.~ By fluid pressure
12.5  DF  .~ Carbonated beverage handling processes
13  DF  .~ Affecting flow by the addition of material or energy
14  DF  .~ Involving pressure control
15  DF  .~ Cleaning, repairing or assembling
15.1  DF  HIGHSPEED FLUID INTAKE MEANS (E.G., JET ENGINE INTAKE)
15.2  DF  .~ With condition responsive control means
38  DF  CONTROL BY CHANGE OF POSITION OR INERTIA OF SYSTEM
39  DF  .~ With second control
40  DF  .~ Position relative body of water (e.g., marine governors)
41  DF  .~.~ Float controlled
42  DF  .~.~ Pressure or head controlled
43  DF  .~ Vent opening or closing on tipping container
44  DF  .~ By shifting of liquid level
45  DF  .~ By pendulum or swinging member
46  DF  .~.~ With servo connection to valve
47  DF  SPEED RESPONSIVE VALVE CONTROL
48  DF  .~ Acceleration responsive valve control
49  DF  .~ With manual valve control
50  DF  .~ Speed change and excess speed valve control
51  DF  .~ With other condition responsive valve control
52  DF  .~.~ Governor drive failure responsive
53  DF  .~ Centrifugal mass type (exclusive of liquid)
54  DF  .~.~ With multiple valves
55  DF  .~.~ Periodically actuated valve
56  DF  .~.~ Rotating valve and rotating governor
57  DF  .~.~ Excess speed responsive
58  DF  .~.~ With fluid servo-motor
59  DF  FREEZE CONDITION RESPONSIVE SAFETY SYSTEMS
60  DF  .~ With freeze waste
61  DF  .~ Stop and waste
62  DF  .~ Low temperature responsive drains
65  DF  COMBUSTION FAILURE RESPONSIVE FUEL SAFETY CUT-OFF FOR BURNERS
66  DF  .~ Thermo-electric
67  DF  DESTRUCTIBLE OR DEFORMABLE ELEMENT CONTROLLED
68.11  DF  .~ Destructible element
68.12  DF  .~.~ Combined destructible and fusible element
68.13  DF  .~.~ Explosive actuation
68.14  DF  .~.~ Separable valve coupling or conduit
68.15  DF  .~.~.~ Tensile or sheer pin or bolt
68.16  DF  .~.~ Tensile or sheer pin or bolt
68.17  DF  .~.~.~ Pressure causes pin or bolt to destruct
68.18  DF  .~.~ With alarm or indicator
68.19  DF  .~.~ Rupture disc
68.21  DF  .~.~.~ Means for holding entire disc after rupture
68.22  DF  .~.~.~ Disc burst after destruction of additional element
68.23  DF  .~.~.~ Direct pressure causes disc to burst
68.24  DF  .~.~.~.~ Two-way rupture disc
68.25  DF  .~.~.~.~ Dome shape
68.26  DF  .~.~.~.~.~ Reverse buckling
68.27  DF  .~.~.~ Specific weakening point
68.28  DF  .~.~.~ Integral disc assembly
68.29  DF  .~.~.~ Knife or cutter causes disc to break
68.3  DF  .~.~.~.~ Movable knife or cutter
69  DF  .~.~ With counterbalancing element
70  DF  .~.~ Frangible element returns pressure responsive valve
71  DF  .~.~ Having pressure responsive valve
72  DF  .~ Heat destructible or fusible
73  DF  .~.~ With second sensing means
74  DF  .~.~ In fluid flow path
75  DF  .~.~ Safety cut-off
76  DF  .~.~.~ With heater for destructible or fusible element
77  DF  .~.~.~ With external closing means
78.1  DF  AMBIENT CONDITION CHANGE RESPONSIVE
78.2  DF  .~ For controlling soil irrigation
78.3  DF  .~.~ Soil moisture sensing
78.4  DF  .~ Burner gas cutoff
78.5  DF  .~ Atmospheric
79  DF  .~.~ Temperature
80  DF  .~.~.~ With additional diverse control
81.1  DF  .~.~ Pressure
81.2  DF  .~ Underwater
803  DF  FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM)
804  DF  .~ Responsive to condition external of system
805  DF  .~.~ And causing change or correction of sensed condition
806  DF  .~ Utilizing diverse fluids
807  DF  .~ Utilizing particular fluid
808  DF  .~ Means to cause rotational flow of fluid (e.g., vortex generator)
809  DF  .~.~ Plural vortex generators
810  DF  .~.~ Vortex generator as control for system
811  DF  .~.~ Vortex generator in interaction chamber of device
812  DF  .~.~ By tangential input to axial output (e.g., vortex amplifier)
813  DF  .~.~.~ With means to vary input or output of device
814  DF  .~ System comprising plural fluidic devices or stages
815  DF  .~.~ Plural power inputs (e.g., parallel inputs)
816  DF  .~.~.~ Variable or different-value power inputs
817  DF  .~.~.~.~ Pulsating power input and continuous-flow power input
818  DF  .~.~.~ With variable or selectable source of control-input signal
819  DF  .~.~.~ To cascaded plural devices
820  DF  .~.~.~.~ With feedback passage(s) between devices of cascade
821  DF  .~.~.~.~ With pulsed control-input signal
822  DF  .~ Plural power inputs to single device
823  DF  .~.~ Intersecting at interaction region (e.g., comparator)
824  DF  .~.~.~ Co-lineal, oppositely-directed power inputs (e.g., impact modulator)
825  DF  .~ Means to regulate or vary operation of device
826  DF  .~.~ To vary frequency of pulses or oscillations
827  DF  .~.~ By non-fluid energy field affecting input (e.g., transducer)
828  DF  .~.~.~ Acoustical or thermal energy
829  DF  .~.~ By movable element
830  DF  .~.~.~ Operating at timed intervals (e.g., to produce pulses)
831  DF  .~.~.~ Electrically-actuated element (e.g., electro-mechanical transducer)
832  DF  .~.~.~ Means (e.g., valve) in control input
833  DF  .~ Structure of body of device
834  DF  .~ Device including passages having V over T configuration
835  DF  .~.~ And feedback passage(s) or path(s)
836  DF  .~.~ With particular characteristics of control input
837  DF  .~.~.~ Multiple control-input passages
838  DF  .~.~ And multiple or joined power-outlet passages
839  DF  .~.~ And enlarged interaction chamber
840  DF  .~.~ And vent passage(s)
841  DF  .~ Device including passages having V over gamma configuration
842  DF  .~ Device including linearly-aligned power stream emitter and power stream collector
82  DF  PRESSURE MODULATING RELAYS OR FOLLOWERS
83  DF  .~ Jet control type
84  DF  .~ Plural series units
85  DF  .~ With counter-balancing pressure feedback to the modulating device
86  DF  .~.~ With counter-counter balancing pressure feedback
87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS
88  DF  .~ Mixture condition maintaining or sensing
89  DF  .~.~ Dividing and recombining flow
91  DF  .~.~ By specific gravity
92  DF  .~.~ By viscosity or consistency
93  DF  .~.~ By optical or chemical property
94  DF  .~ Fuel controlled by boiler or water system condition
98  DF  .~ Self-proportioning flow systems
99  DF  .~.~ Interconnected flow displacement elements
99.5  DF  .~.~.~ Movable trap chamber
100  DF  .~.~ Flow comparison or differential response
101  DF  .~.~.~ Flow dividers (e.g., reversely acting controls)
101.11  DF  .~.~.~ Main line flow displaces or entrains material from reservoir
101.19  DF  .~.~.~ With electrical controller
101.21  DF  .~.~ Flow displacement element actuates electrical controller
101.25  DF  .~.~ Liquid level response
101.27  DF  .~.~.~ Float controlled weir or valve
101.29  DF  .~.~.~ Swinging outlet pipe controller
101.31  DF  .~.~ With measuring type discharge assistant
102  DF  .~ Supply and exhaust type
103  DF  .~.~ Vacuum or suction pulsator type (e.g., milking machine)
104  DF  .~.~.~ With trip linkage or snap action
105  DF  .~.~.~ With pulsation responsive pilot valve
106  DF  .~.~ Reversing or 4-way valve systems
107  DF  .~.~ Waste responsive to flow stoppage
109  DF  .~ Self-controlled branched flow systems
110  DF  .~.~ Dividing and recombining
111  DF  .~.~ Plural inflows
112  DF  .~.~.~ Alternate or successive inflows
113  DF  .~.~.~.~ Control by depletion of source
114  DF  .~.~.~ One inflow supplements another
115.01  DF  .~.~ Bypass or relief controlled by main line fluid condition
115.02  DF  .~.~.~ Liquid level responsive
115.03  DF  .~.~.~ Flow rate responsive
115.04  DF  .~.~.~.~ Including controlling main line flow
115.05  DF  .~.~.~.~.~ Relief or bypass closes as main opens
115.06  DF  .~.~.~.~ Bypass or relief valve biased open
115.07  DF  .~.~.~.~ Pilot valve operated
115.08  DF  .~.~.~.~ Carried choke
115.09  DF  .~.~.~.~ Choke
115.1  DF  .~.~.~.~.~ Variable choke resistance
115.11  DF  .~.~.~.~ Venturi
115.12  DF  .~.~.~.~ Flapper
115.13  DF  .~.~.~ Pressure responsive
116.3  DF  .~.~.~.~ With pressure reducing inlet valve
116.5  DF  .~.~.~.~.~ Relief port through common sensing means
115.14  DF  .~.~.~.~ Common sensor for both bypass or relief valve and other branch valve
115.15  DF  .~.~.~.~.~ Bypass or relief valve opens as other branch valve closes
115.16  DF  .~.~.~.~ Bypass or relief valve biased open
115.17  DF  .~.~.~.~.~ Increasing pressure progressively closes then reopens by-pass or relief valve
115.18  DF  .~.~.~.~ Bypass or relief valve responsive to pressure downstream of outlet valve
115.19  DF  .~.~.~.~.~ Pilot valve
115.2  DF  .~.~.~.~.~ Outlet valve carried by bypass or relief valve
115.21  DF  .~.~.~.~ Plural sensors for single bypass or relief valve
115.22  DF  .~.~.~.~.~ Sensors interconnected by timing or restrictive orifice
115.23  DF  .~.~.~.~ Pilot valve operated
115.24  DF  .~.~.~.~ Mechanical movement between sensor and valve
115.25  DF  .~.~.~.~ Electrical control
115.26  DF  .~.~.~.~ Sensor rigid with valve
115.27  DF  .~.~.~.~.~ Flexible sensor
115.28  DF  .~.~.~.~.~ Pressure responsive outlet valve
118.01  DF  .~.~ Plural outflows
118.02  DF  .~.~.~ Single actuator operates plural outlets simultaneously
118.03  DF  .~.~.~ Biased open isolation valve
118.04  DF  .~.~.~ Flow rate responsive
118.05  DF  .~.~.~.~ Primer valve
118.06  DF  .~.~.~ Pressure responsive
118.07  DF  .~.~.~.~ With external control for correlating valve (e.g., manual)
119.01  DF  .~.~.~ Alternately or successively substituted outflow
120  DF  .~.~.~.~ Control by filling auxiliary gravitating or float operating tank
121  DF  .~.~.~.~ Control by filling outlet tank or receiver
122  DF  .~.~.~.~.~ Float controlled
119.02  DF  .~.~.~.~ Four port reversing valve
119.03  DF  .~.~.~.~ Responsive to pressure or flow interruption
119.04  DF  .~.~.~.~.~ Plural outlets control with automatic reset
119.05  DF  .~.~.~.~.~ Manually set to a single outflow position
119.06  DF  .~.~.~.~ Flow rate responsive
119.07  DF  .~.~.~.~.~ Flow sensing turbine
119.08  DF  .~.~.~.~ Pressure responsive
119.09  DF  .~.~.~.~.~ Responsive to outlet pressure
119.1  DF  .~.~.~.~ Electrical control
87.02  DF  .~ Liquid level responsive
87.03  DF  .~ Flow rate responsive
87.04  DF  .~.~ Pressure differential
87.05  DF  .~ Plural sensors
87.06  DF  .~.~ For single valve
123  DF  SIPHONS
124  DF  .~ Plural
125  DF  .~.~ Tank truck mounted
126  DF  .~.~ Sequentially discharging in parallel
127  DF  .~.~.~ From plural tanks
128  DF  .~.~ Main siphon with auxiliary starting, stopping or resetting siphon
129  DF  .~.~.~ Sinking or bucket-type float operated main siphon, float emptying auxiliary siphon
130  DF  .~ With discharge-controlling receiver
131  DF  .~.~ With float
132  DF  .~ Periodic or accumulation responsive discharge
133  DF  .~.~ With manual control
134  DF  .~.~ Control by filling auxiliary tank
135  DF  .~.~ Float-operated inlet to siphon
136  DF  .~.~ Release of trapped air
137  DF  .~.~.~ Through float-operated vent
138  DF  .~.~.~ Through liquid trap seal
139  DF  .~.~.~.~ Auxiliary liquid trap seal
140  DF  .~ With strainer, filter, separator or sediment trap
141  DF  .~ With recorder, register, signal, indicator or inspection window
142  DF  .~ With flow starting, stopping or maintaining means
143  DF  .~.~ Siphon venting or breaking
144  DF  .~.~ With leakage or entrained air removal
145  DF  .~.~ Pressure applied to liquid in supply chamber
146  DF  .~.~ Plunge or immersion starting
147  DF  .~.~ Pump or liquid displacement device for flow passage
148  DF  .~.~.~ Piston
149  DF  .~.~.~.~ Co-axial within flow passage
150  DF  .~.~.~ Collapsible bulb
150.5  DF  .~.~ Siphon inlet movable to and from seat
151  DF  .~.~ With valve or closure in-flow passage
152  DF  .~ With means for mounting and/or positioning relative to siphon chamber
153  DF  .~ Elements
154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS
155  DF  .~ Gas lift valves for wells
156  DF  .~ Gas pressure discharge of liquids feed traps (e.g., to boiler)
157  DF  .~.~ Gas pressure controlled by amount of liquids in boiler or discharge receiver
158  DF  .~.~.~ Pressure connection at liquid level in boiler or discharge receiver
159  DF  .~.~ Gas pressure controlled by amount of liquid in trap
160  DF  .~.~.~ Plural trap chambers
161  DF  .~.~.~.~ Gravitating
162  DF  .~.~.~ Gravitating vessel
163  DF  .~.~.~.~ Sinking or bucket type float
164  DF  .~.~.~.~ Pivoted vessel with fluid passage through pivot
165  DF  .~.~.~ Float responsive
166  DF  .~.~.~.~ Liquid control valve positively actuated
167  DF  .~.~.~.~ Gas condensing type
168  DF  .~.~.~.~ Gas inlet and outlet valves unitary
169  DF  .~.~ Gas pressure controlled by manual or cyclic means
170  DF  .~.~.~ Movable trap chamber
170.1  DF  .~ Foam control in gas charged liquids
170.2  DF  .~.~ Level or pressure responsive
170.3  DF  .~.~ Separate handling of foam
170.4  DF  .~.~ With conditioning trap or chamber
170.5  DF  .~.~.~ Recarbonation
170.6  DF  .~.~.~ With trap or chamber by-pass
171  DF  .~ Fluid separating traps or vents
172  DF  .~.~ Liquids separated from liquid
173  DF  .~.~ Plural discriminating outlets for diverse fluids
174  DF  .~.~.~ Common actuator for control valves
175  DF  .~.~.~ Choke or restricted passage gas bleed
176  DF  .~.~.~.~ From above liquid level
177  DF  .~.~ Discriminating outlet for liquid
178  DF  .~.~.~ With alternately operated inlet and outlet valves
179  DF  .~.~.~ With non-discriminating gas vent or liquid discharge
180  DF  .~.~.~.~ Abnormal pressure responsive liquid blow-off or drain
181  DF  .~.~.~.~ Manual control
182  DF  .~.~.~ With auxiliary inlet or by-pass valve
183  DF  .~.~.~ With fluid responsive valve
184  DF  .~.~.~.~ Successively opened valves
185  DF  .~.~.~.~ Gas collecting float (e.g., inverted bucket)
186  DF  .~.~.~.~.~ Downstream from valve
187  DF  .~.~.~.~ Level responsive
188  DF  .~.~.~.~.~ Weight or pressure
189  DF  .~.~.~.~.~.~ Gravitating vessel
190  DF  .~.~.~.~.~.~.~ Sinking or bucket type float
191  DF  .~.~.~.~.~.~.~.~ Servo-control
192  DF  .~.~.~.~.~ Float
193  DF  .~.~.~.~.~.~ With main line gas outlet from trap chamber
194  DF  .~.~.~.~.~.~ With outlet extending above liquid in trap
195  DF  .~.~.~.~.~.~ Servo-control
196  DF  .~.~.~.~.~.~ With pressure balanced outlet valve
197  DF  .~.~ Discriminating outlet for gas
198  DF  .~.~.~ With reverse flow stop or pressure regulating valve
199  DF  .~.~.~ Fluid sensing valve
200  DF  .~.~.~.~ With vaporized liquid stop
201  DF  .~.~.~.~.~ With separate return for condensate
202  DF  .~.~.~.~ Float responsive
203  DF  .~.~ With liquid emptying means
204  DF  .~.~.~ Self-emptying
205  DF  .~ Liquid filling by evacuating container
205.5  DF  .~ Main line flow displaces additive from shunt reservoir
206  DF  .~ Gas pressure storage over or displacement of liquid
207  DF  .~.~ Surge suppression
207.5  DF  .~.~ With return of liquid to supply
208  DF  .~.~ Plural units
209  DF  .~.~ With gas maintenance or application
210  DF  .~.~.~ Gas carried by or evolved from liquid
211  DF  .~.~.~.~ Gas injectors
211.5  DF  .~.~.~ Gas injected by liquid pressure or flow
212  DF  .~.~.~ Unitary mounting for gas pressure inlet and liquid outlet
213  DF  .~.~ With liquid level responsive gas vent or whistle
214  DF  .~.~.~ Combined high and low level responsive
215  DF  BACK FLOW PREVENTION BY VACUUM BREAKING (E.G., ANTI-SIPHON DEVICES)
216  DF  .~ Air vent in liquid flow line
216.1  DF  .~.~ With liquid seal in liquid flow line
216.2  DF  .~.~.~ Automatic valve in vent line
217  DF  .~.~ Valved
218  DF  .~.~.~ With co-acting valve in liquid flow path
219  DF  LARNER-JOHNSON TYPE VALVES; I.E., TELESCOPING INTERNAL VALVE IN EXPANDED FLOW LINE SECTION
220  DF  .~ Line condition change responsive
221  DF  .~ Internal servo-motor with internal pilot valve
222  DF  .~.~ Pilot controlled passage in nose or needle
223  DF  INFLATABLE ARTICLE (E.G., TIRE FILLING CHUCK AND/OR STEM)
224  DF  .~ With pressure-responsive pressure-control means
224.5  DF  .~.~ Pulsating
225  DF  .~.~ Diaphragm, bellows or expansible tube
226  DF  .~.~ Co-axial inflation and relief valves
227  DF  .~ With gauge or indicator
228  DF  .~.~ With deflating means
229  DF  .~.~ Selectively connected
230  DF  .~ Stem attached relief valve
231  DF  .~ With coupling means
232  DF  .~ With cap
233  DF  .~.~ Valve actuating, assembling or locking means on cap
234  DF  .~.~.~ Valve manually seated
234.5  DF  .~ Removable valve head and seat unit (valve insides)
234.6  DF  WITH VEHICLE GUIDE OR SUPPORT, E.G., SERVICE STATION
236.1  DF  DISTRIBUTION SYSTEMS INVOLVING GEOGRAPHIC FEATURES
237  DF  WITH CLEANER, LUBRICATION ADDED TO FLUID OR LIQUID SEALING AT VALVE INTERFACE
238  DF  .~ Cleaning or steam sterilizing
239  DF  .~.~ Reverse fluid flow
240  DF  .~.~ With separate material addition
241  DF  .~.~ Steam sterilizing
242  DF  .~.~ Mechanical cleaning
243  DF  .~.~.~ Valve grinding motion of valve on seat
243.1  DF  .~.~.~.~ Concentric stem
243.2  DF  .~.~.~.~ Spring pressed
243.3  DF  .~.~.~.~ Lost motion permits grinding
243.4  DF  .~.~.~.~ With swivel-preventing means
243.5  DF  .~.~.~.~ Nut releasable from body and/or stem
243.6  DF  .~.~.~.~ With independent grinding actuator
243.7  DF  .~.~.~.~.~ Separable
244  DF  .~.~.~ Cleaning member reciprocates in passage
245  DF  .~.~.~.~ By-pass cleaning
245.5  DF  .~.~.~.~ Independent actuation
246  DF  .~ Liquid supplied at valve interface
246.11  DF  .~.~ Plural feed
246.12  DF  .~.~ Line pressure feed
246.13  DF  .~.~ Feed by or with actuation
246.14  DF  .~.~ Loss control
246.15  DF  .~.~ Screw feed
246.16  DF  .~.~.~ With check valve
246.17  DF  .~.~.~.~ Excess relief
246.18  DF  .~.~.~.~ Jacking
246.19  DF  .~.~.~ Jacking
246.2  DF  .~.~.~ Seating
246.21  DF  .~.~ Spring biased piston feed
246.22  DF  .~.~ External pressure
246.23  DF  .~.~ Gravity or capillary feed
247  DF  WITH LIQUID VALVES OR LIQUID TRAP SEALS
247.11  DF  .~ Liquid seal in liquid flow line; flow liquid forms seal
247.13  DF  .~.~ Valves
247.15  DF  .~.~.~ Line condition change responsive
247.17  DF  .~.~.~.~ Plural valves or valve seats
247.19  DF  .~.~.~.~ Pivoted valve
247.21  DF  .~.~.~.~ Ball valve
247.23  DF  .~.~.~.~.~ Seats vertically up
247.25  DF  .~.~ Seal replenishers
247.27  DF  .~.~ Plural inlet
247.29  DF  .~.~ Divided and recombined passages
247.31  DF  .~.~ Tangential inlet flow
247.33  DF  .~.~ Downward partition encircles projecting outlet
247.35  DF  .~.~ Submerged inlet pipe end
247.37  DF  .~.~.~ Hinged seal bowl
247.39  DF  .~.~.~ Distinct seal bowl in flow line connected casing
247.41  DF  .~.~ U-seals
247.43  DF  .~.~.~ Topside access beneath cover plate closed floor opening
247.45  DF  .~.~.~ Enlarged upflow leg
247.47  DF  .~.~.~.~ Topside access opening
247.49  DF  .~.~.~ Even diameter legs
247.51  DF  .~.~.~.~ Access opening
248  DF  .~ Seal for relatively movable valving parts
249  DF  .~.~ Horizontally moving valve
250  DF  .~.~.~ Rotary
251.1  DF  .~ Liquid valves
252  DF  .~.~ Branched passage for sealing liquid
253  DF  .~.~ With auxiliary means for varying liquid level
254  DF  .~.~ With baffle
255  DF  PLURAL TANKS OR COMPARTMENTS WITH PARALLEL FLOW
256  DF  .~ Sequentially filled and emptied (e.g., holding type)
257  DF  .~.~ With relative rotation of tank group and filling head
258  DF  .~.~.~ With rotary filling and emptying head
259  DF  .~ With housings, supports or stacking arrangements
260  DF  .~ Battery or electrolytic cell replenishment
261  DF  .~.~ Barometric supply
262  DF  .~ Flow dividing compartments
263  DF  .~ Tank type manifold (i.e., one tank supplies or receives from at least two others)
264  DF  .~ Tank within tank
265  DF  .~ With cross connecting passage
266  DF  .~ With manifold or grouped outlets
267  DF  .~.~ Tank truck type
268  DF  WITH HOLDER FOR SOLID, FLAKY OR PULVERIZED MATERIAL TO BE DISSOLVED OR ENTRAINED
269  DF  CONVERTIBLE
269.5  DF  .~ Reversible check
270  DF  .~ Unit orientable in a single location between plural positions
270.5  DF  .~.~ Reversible stop and vent or waste
271  DF  .~ Units interchangeable between alternate locations
272  DF  HYDRANT TYPE
273  DF  .~ Water crane type
274  DF  .~.~ Spout operated valve
275  DF  .~.~ Rotating riser
276  DF  .~.~.~ Spout articulated to riser
277  DF  .~.~.~ Vertically movable riser
278  DF  .~.~ Extensible spout
279  DF  .~.~ Spout articulated to riser
280  DF  .~ Plural riser
281  DF  .~ Expansible chamber operated by valve actuator for draining riser
282  DF  .~ With pump or ejector
283  DF  .~ Removable valve and valve seat
284  DF  .~.~ With extension to facilitate removal
285  DF  .~ Removable valve with supplemental check valve
286  DF  .~ Movable riser actuated valve
287  DF  .~.~ Reciprocating riser
288  DF  .~.~.~ Piston type valve
289  DF  .~ Balanced valve
290  DF  .~ Valve actuator extends laterally from bottom of riser
291  DF  .~ Valve actuator outside riser
292  DF  .~.~ Lever actuator
293  DF  .~.~ With casing, flush with ground or pavement surface
294  DF  .~ With casing
295  DF  .~.~ Flush with ground or pavement surface
296  DF  .~.~ Cap, cover or hood
297  DF  .~.~ With heater
298  DF  .~ With actuator lubricating means
299  DF  .~ With valve at outlet
300  DF  .~ With supplemental valve
301  DF  .~ Protection against freezing
302  DF  .~.~ Stop and waste
303  DF  .~.~.~ With disabling means
304  DF  .~.~.~ Separate relatively movable valves with single actuator
305  DF  .~.~.~.~ Unidirectional abutting connection between main valve or actuator and waste valve
306  DF  .~.~.~.~ With screw or gear in actuating mechanism
307  DF  .~.~.~ Reciprocating relatively fixed valves
308  DF  .~.~.~.~ Waste through lower valve guide
309  DF  REVERSING VALVES - REGENERATIVE FURNACE TYPE
310  DF  .~ With cooling
311  DF  .~ Rotary reversing valve
312  DF  WITH LEAKAGE OR DRIP COLLECTING
313  DF  .~ Relatively movable receptacle or drain pipe and outlet
314  DF  .~ Collector for waste liquid derived from solid, gas or vapor
315  DF  WITH REPAIR, TAPPING OR ASSEMBLY MEANS
316  DF  .~ With holding means functioning only during transportation assembly or disassembly
317  DF  .~ Tapping a pipe, keg, or apertured tank under pressure
318  DF  .~.~ With aperture forming means
319  DF  .~.~ Imperforate closure removing and holding tap
320  DF  .~.~ With valved closure or bung
321  DF  .~.~.~ Combined rotary and longitudinal movement of valve
322  DF  .~.~.~ Longitudinal movement of valve
323  DF  .~.~.~ Rotary movement of valve
324  DF  .~.~ With core ejectors
325  DF  .~.~.~ Impact operated
326  DF  .~ Foot valve extraction from top of enclosure
327  DF  .~ With disassembly tool engaging feature
328  DF  .~.~ Wrench engaging lugs
329  DF  .~ With provision of alternate wear parts
329.01  DF  .~.~ Valve heads and/or seats
329.02  DF  .~.~.~ Opposite duplicate surfaces of unitary structure
329.03  DF  .~.~.~.~ Homogeneous material
329.04  DF  .~.~.~.~.~ Valve heads
329.05  DF  .~.~.~ Different portions of continuous surfaces
329.06  DF  .~.~.~ Successively used adjacent independent elements
329.1  DF  .~ Removable valve with normally disabled supplemental check valve
329.2  DF  .~.~ Check valve disabled by normally movable main valve part
329.3  DF  .~.~.~ Ball check
329.4  DF  .~.~.~ Spring bias
330  DF  NON-VALVING MOTION OF THE VALVE OR VALVE SEAT
331  DF  .~ Rotary motion of a reciprocating valve
332  DF  .~.~ Turbine on valve
333  DF  .~.~ Manual rotating means
334  DF  WITH HEATING OR COOLING OF THE SYSTEM
335  DF  .~ With burner
336  DF  .~.~ Flue extending through fluid
337  DF  .~ Hot and cold water system having a connection from the hot to the cold channel
338  DF  .~ Air heated or cooled (fan, fins, or channels)
339  DF  .~ With diversion of part of fluid to heat or cool the device or its contents
340  DF  .~ Circulating fluid in heat exchange relationship
341  DF  .~ With electric heating element
342  DF  WITH FLUID SYSTEM SUPPORT FOR WORKMAN OR NON-SYSTEM MATERIAL
343  DF  WITH CASING, SUPPORT, PROTECTOR OR STATIC CONSTRUCTIONAL INSTALLATIONS
899  DF  .~ Vehicle
345  DF  .~.~ Locomotive
346  DF  .~.~.~ Boiler or steam dome
347  DF  .~.~ Railway car
348  DF  .~.~.~ Car frame
349  DF  .~.~.~ End of car
350  DF  .~.~.~ Roof, wall or floor
351  DF  .~.~ Automotive
352  DF  .~.~.~ Steering post or wheel
353  DF  .~.~.~ Dash
354  DF  .~.~.~ Floor or frame
355  DF  .~.~.~ Fender or running board
355.12  DF  .~.~ With hose reel storage means
899.1  DF  .~.~ Guided by means of track or guideway
899.2  DF  .~.~ Aerial or water-supported (e.g., airplane or ship, etc.)
899.3  DF  .~.~ With retractable or nonuse-positionable support wheel
899.4  DF  .~.~ Vehicle supports fluid compressor and compressed fluid storage tank
355.16  DF  .~ With hose storage or retrieval means
355.17  DF  .~.~ With means for plural hoses
355.18  DF  .~.~ With flow regulation responsive to hose movement
355.19  DF  .~.~.~ Reel type
355.2  DF  .~.~ With retrieval means
355.21  DF  .~.~.~ Power stop or brake
355.22  DF  .~.~.~.~ Responsive to position of hose in casing
355.23  DF  .~.~.~ Biased to retracted position
355.24  DF  .~.~.~.~ Boom type
355.25  DF  .~.~.~.~ Weighted
355.26  DF  .~.~ Reel with support therefor
355.27  DF  .~.~.~ Ground supported
355.28  DF  .~.~ Basket or holder for folded coiled hose
356  DF  .~ Static constructional installations
357  DF  .~.~ Buildings
358  DF  .~.~.~ Outside access to portions of the system
359  DF  .~.~.~ Escutcheon type support
360  DF  .~.~.~ Wall
361  DF  .~.~.~.~ Recessed gas outlet box
362  DF  .~.~.~ Floor installation
363  DF  .~.~ Ground supporting enclosure
364  DF  .~.~.~ Valve and meter wells
365  DF  .~.~.~.~ With means to center well on valve
366  DF  .~.~.~.~.~ Detachable base plate
367  DF  .~.~.~.~.~ Vertical casing aligned by valve casing
368  DF  .~.~.~.~ Combined with actuator
369  DF  .~.~.~.~.~ Telescopic well casing
370  DF  .~.~.~.~ Telescopic well casing
371  DF  .~.~.~.~ Covers
372  DF  .~.~.~ Pipe line transport
373  DF  .~.~ Tapering or tower type
374  DF  .~ Furniture and housing furnishings
375  DF  .~ Jacketed
376  DF  .~ Tank supports
377  DF  .~ Guards and shields
378  DF  .~.~ Resilient abutment for preventing breakage
379  DF  .~.~ Nozzle abutment for scratch or damage prevention
380  DF  .~.~ Cover for beer cooler aperture for faucet
381  DF  .~.~ Sanitary covers or shields
382  DF  .~.~ Valve guards
382.5  DF  .~.~.~ With means for accommodating a detachable actuator
383  DF  WITH LOCK OR SEAL
384  DF  .~ With seal
384.2  DF  .~ Common lock and valve actuator
384.4  DF  .~.~ Combination lock
384.6  DF  .~.~ Biased valve
384.8  DF  .~.~ Mechanical movement between lock and valve
385  DF  .~ Locks against rotary motion
386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS
387  DF  .~ Washing machine cycle control
388  DF  .~ Liquid excluding devices for gas inlet or outlets
389  DF  .~ With second diverse control
390  DF  .~.~ Manual control
391  DF  .~ Control of both inflow and outflow of tank
392  DF  .~ Electrical characteristic sensing
393  DF  .~ With control fluid connection at desired liquid level
395  DF  .~ Control of outflow from tank
396  DF  .~.~ Self-emptying tanks
397  DF  .~.~.~ By float
398  DF  .~.~ By float
399  DF  .~.~.~ Low level safety cut-off
400  DF  .~ With supplemental or safety closing means or bias
401  DF  .~.~ Sinking or bucket type float
402  DF  .~.~ Gravitating tank
403  DF  .~ By weight of accumulated fluid
404  DF  .~.~ In sinking or bucket type float
405  DF  .~.~ Oil burner fuel overflow preventing safety cut-offs
406  DF  .~.~ In communicating measuring vessel
407  DF  .~.~.~ Top and bottom connections
408  DF  .~.~ In gravitating tank
409  DF  .~ By float controlled valve
410  DF  .~.~ Valve opened by external means, closing or closing control by float
411  DF  .~.~ Single float controls plural valves
412  DF  .~.~ Servo relay operation of control
413  DF  .~.~.~ Fluid pressure
414  DF  .~.~.~.~ Flexible diaphragm valve
415  DF  .~.~.~.~ From tank
416  DF  .~.~ Quick acting
417  DF  .~.~.~ Pilot float released
418  DF  .~.~.~ Over center mechanism
419  DF  .~.~.~.~ Shifting weight
420  DF  .~.~.~ Trip mechanism
421  DF  .~.~.~.~ Weight or spring bias
422  DF  .~.~.~ Lost motion mechanism
423  DF  .~.~ Plural floats
424  DF  .~.~ With counter-balance
425  DF  .~.~.~ Within tank
426  DF  .~.~ Level adjustment or selection means
427  DF  .~.~ With float leakage disposal
428  DF  .~.~ In separate communicating float chamber
429  DF  .~.~ Rectilinearly traveling float
430  DF  .~.~.~ Float co-axial with valve or port
431  DF  .~.~.~.~ Float is spreader or anti-splash means
432  DF  .~.~.~.~ Float surrounds inlet pipe
433  DF  .~.~.~.~ Float rigid with valve
434  DF  .~.~ Float arm operated valve
435  DF  .~.~.~ With valve retarder or cushion means
436  DF  .~.~.~ With flow guide or restrictor
437  DF  .~.~.~.~ External hood or deflector or annular outlet surrounding the inlet pipe
438  DF  .~.~.~ Movable nozzle or inlet terminal
439  DF  .~.~.~ Valve removable from outside container
440  DF  .~.~.~ With U-shaped inlet pipe having terminal valve
441  DF  .~.~.~ With refill pipe
442  DF  .~.~.~ Assembly mounted on and having reciprocating valve element co axial with inlet pipe
443  DF  .~.~.~.~ Horizontal or side entering pipe
444  DF  .~.~.~.~ Vertical inlet riser
445  DF  .~.~.~ With toggle or second lever connected to valve
446  DF  .~.~.~ With interposed cam, gear or threaded connection
447  DF  .~.~.~ Rotary valve element
448  DF  .~.~.~ Pivoted valve
449  DF  .~.~.~ Ball valves
450  DF  .~.~.~ Balanced valves
451  DF  .~.~.~ Flexible valve
453  DF  .~ Barometric
454  DF  .~.~ With shut-off between supply tank and receiver
454.2  DF  REMOVABLE VALVE HEAD AND SEAT UNIT
454.4  DF  .~ Pump type
454.5  DF  .~ Threaded into valve casing
454.6  DF  .~ Retained by bonnet or closure
455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES
456  DF  .~ Safety cut-off requiring reset
457  DF  .~.~ Thermal
458  DF  .~.~ Responsive to both high and low pressure or velocity
459  DF  .~.~ Responsive to change in rate of flow
460  DF  .~.~.~ Excessive flow cut-off
461  DF  .~.~ High pressure cut-off
462  DF  .~.~ Reset by pressure equalization valve or by-pass
463  DF  .~.~ Fluid released trip
464  DF  .~.~ Fluid counter-biased or unseated valve
465  DF  .~.~.~ With mechanical stop against reopening
466  DF  .~.~.~ With fluid pressure seating of valve
467  DF  .~ Fluid opened valve requiring reset
467.5  DF  .~ Consistency responsive
468  DF  .~ Thermal responsive
469  DF  .~ Pop valves
470  DF  .~.~ Pop closing valves
471  DF  .~.~ Pop pressure reactor in inflow to valve
472  DF  .~.~ Pop pressure reactor in branched released path
473  DF  .~.~.~ Separate relief valves or valves for each branch
474  DF  .~.~ Lost motion between pop pressure reactor and valve
475  DF  .~.~ Adjustable choke
476  DF  .~.~.~ Annular lip or baffle
477  DF  .~.~.~.~ On movable valve part
478  DF  .~.~.~.~ Screw threaded
479  DF  .~ Combustion engine induction type
480  DF  .~.~ Valve in auxiliary inlet to induction line
481  DF  .~.~ With manual modifier
482  DF  .~.~ With suction compensator
483  DF  .~.~ With separate reactor surface
484  DF  .~.~ Unbalanced pivoted valve (e.g., unbalanced butterfly type)
484.2  DF  .~ Line flow effect assisted
484.4  DF  .~.~ Reactor surface normal to flow
484.6  DF  .~.~ Reactor surface separated from flow by apertured partition
484.8  DF  .~.~.~ Through separate aperture
485  DF  .~ Pilot or servo controlled
486  DF  .~.~ Responsive to change in rate of fluid flow
487  DF  .~.~.~ Control by pressures across flow line valve
487.5  DF  .~.~ Electrically actuated valve
488  DF  .~.~ Fluid pressure type
489  DF  .~.~.~ Choked or throttled pressure type
490  DF  .~.~.~.~ Pilot valve within main valve head
491  DF  .~.~.~.~ Choked passage through main valve head
489.3  DF  .~.~.~.~ Loose fitting piston
489.5  DF  .~.~.~.~ Pilot controls supply to pressure chamber
492  DF  .~.~.~ Single acting fluid servo
492.5  DF  .~.~.~.~ Spring biased
493  DF  .~ Bi-directional flow valves
493.1  DF  .~.~ One head and seat carried by head of another
493.2  DF  .~.~.~ Supporting valve only spring biased
493.3  DF  .~.~.~ Supporting valve spring carried by supporting valve
493.4  DF  .~.~.~.~ Spring stop on supported valve stem
493.5  DF  .~.~.~.~ Spring abuts guide for supported valve stem
493.6  DF  .~.~.~ Both valves spring biased
493.7  DF  .~.~ Axes of ports perpendicular
493.8  DF  .~.~ Axes of ports parallel
493.9  DF  .~.~ Axes of ports co-axial
494  DF  .~ With separate connected fluid reactor surface
495  DF  .~.~ With manual or external control for line valve
496  DF  .~.~ Valve closes in responses to reverse flow
497  DF  .~.~ Responsive to change in rate of fluid flow
498  DF  .~.~.~ Valve closes in response to excessive flow
499  DF  .~.~.~ Turbine or swinging vane type reactor
500  DF  .~.~.~ Expansible chamber subject to differential pressures
501  DF  .~.~.~.~ Pressures across fixed choke
502  DF  .~.~.~.~ With Venturi tube having a connection to throat
503  DF  .~.~.~.~ Pressures across flow line valve
504  DF  .~.~.~ Movable deflector or choke
505  DF  .~.~ With opening bias (e.g., pressure regulator)
505.11  DF  .~.~.~ With relief valve
505.12  DF  .~.~.~ Multi-stage
505.13  DF  .~.~.~ Senses inlet pressure
505.14  DF  .~.~.~ Bias variable during operation
505.15  DF  .~.~.~.~ Ancillary reactor surface responds to inlet pressure
505.16  DF  .~.~.~.~ Liquid transfer
505.17  DF  .~.~.~.~ Weight
505.18  DF  .~.~.~ Balanced valve
505.19  DF  .~.~.~ Liquid level responsive gas flow control
505.2  DF  .~.~.~ With protective separator
505.21  DF  .~.~.~ Main flow through isolated reactor chamber
505.22  DF  .~.~.~ Through external pipe
505.23  DF  .~.~.~.~ Modified valve casing
505.24  DF  .~.~.~.~ Adjustable external lever
505.25  DF  .~.~.~ Apertured reactor surface surrounds flow line
505.26  DF  .~.~.~ Reactor surface separated by apertured partition
505.27  DF  .~.~.~.~ In valve stem
505.28  DF  .~.~.~.~.~ Also through reactor surface
505.29  DF  .~.~.~.~ Valve stem passes through the aperture
505.3  DF  .~.~.~.~.~ Plural reactor surfaces
505.31  DF  .~.~.~.~.~ Reactor is an inverted cup having liquid seal
505.32  DF  .~.~.~.~.~.~ With movement dampener
505.33  DF  .~.~.~.~.~.~ Valve head in inlet chamber
505.34  DF  .~.~.~.~.~ Valve head in inlet chamber
505.35  DF  .~.~.~.~.~.~ Rectilinear valve stem rigid with reactor surface
505.36  DF  .~.~.~.~ Reactor surface is diaphragm
505.37  DF  .~.~.~.~.~ With valve closing bias
505.38  DF  .~.~.~ Reactor surface closes chamber
505.39  DF  .~.~.~.~ Valve head in inlet chamber
505.4  DF  .~.~.~.~.~ Reactor surface is inverted cup (float)
505.41  DF  .~.~.~.~.~ Rectilinear valve stem rigid with reactor surface
505.42  DF  .~.~.~.~.~ With valve closing bias
505.43  DF  .~.~.~.~.~.~ In reactor chamber
505.44  DF  .~.~.~.~ Valve head on yoke
505.45  DF  .~.~.~.~.~ Yoke has valve closing bias
505.46  DF  .~.~.~.~ Reactor operatively connected to valve by mechanical movement
505.47  DF  .~.~.~ With mechanical movement between actuator and valve
506  DF  .~.~ Plural valves biased closed
507  DF  .~.~ With means for mounting or connecting to system
508  DF  .~.~ Valve seat or external sleeve moves to open valve
509  DF  .~.~ Valve seating in direction of flow
510  DF  .~.~.~ Flexible diaphragm or bellows reactor
511  DF  .~ Direct response valves (i.e., check valve type)
512  DF  .~.~ Plural
512.1  DF  .~.~.~ Dividing and recombining in a single flow path
512.15  DF  .~.~.~.~ Integral resilient member forms plural valves
512.2  DF  .~.~.~ One valve carries head and seat for second valve
512.3  DF  .~.~.~ Diverse types
512.4  DF  .~.~.~ Integral resilient member forms plural valves
512.5  DF  .~.~.~ With common biasing means
513  DF  .~.~.~ Mechanically interconnected
513.3  DF  .~.~ With leak passage
513.5  DF  .~.~.~ Permits flow at valve interface
513.7  DF  .~.~.~ Bypass in valve casing
514  DF  .~.~ With retarder or dashpot
514.3  DF  .~.~.~ End of valve forms dashpot chamber
514.5  DF  .~.~.~ End of valve moves inside dashpot chamber
514.7  DF  .~.~.~.~ Enlarged piston on end of valve stem
515  DF  .~.~ In couplings for coaxial conduits, e.g., drill pipe check valves
515.3  DF  .~.~.~ Valve seat threaded into a coupling element
515.5  DF  .~.~.~ Valve seat formed on or carried by a coupling element
515.7  DF  .~.~.~ Valve seat clamped between coupling elements
516  DF  .~.~ With means for selecting area of valve or seat
516.11  DF  .~.~ Single head, plural ports in parallel
516.13  DF  .~.~.~ Concentric ports
516.15  DF  .~.~.~ Annular head
516.17  DF  .~.~.~.~ Central post on seat
516.19  DF  .~.~.~.~.~ Stop
516.21  DF  .~.~.~.~.~.~ With guide
516.23  DF  .~.~.~.~.~ Guide
516.25  DF  .~.~ Plural seating
516.27  DF  .~.~.~ Sequential
516.29  DF  .~.~.~.~ Resilient gasket
517  DF  .~.~ Biased open
518  DF  .~.~.~ Oppositely swinging vanes
519  DF  .~.~.~ Weight biased
519.5  DF  .~.~.~.~ Ball valves
520  DF  .~.~.~.~ Edge pivoted valve
521  DF  .~.~.~ Pivoted valves
522  DF  .~.~ With external means for opposing bias
523  DF  .~.~.~ With means for retaining external means in bias opposing position
524  DF  .~.~ With bias adjustment indicator
843  DF  .~.~ Resilient material valve
844  DF  .~.~.~ Having expansible port
845  DF  .~.~.~.~ Apertured plate
846  DF  .~.~.~.~ Having exit lip
847  DF  .~.~.~.~.~ With biasing means
848  DF  .~.~.~.~.~ Side vent
849  DF  .~.~.~.~.~ Multiple slit
850  DF  .~.~.~.~.~ Internally extending mount
851  DF  .~.~.~ Center flexing strip
852  DF  .~.~.~ With valve member flexing about securement
853  DF  .~.~.~.~ Sleeve
854  DF  .~.~.~.~ Central mount
855  DF  .~.~.~.~ Flap or reed
856  DF  .~.~.~.~.~ With stop
857  DF  .~.~.~.~.~ With spring
858  DF  .~.~.~.~.~ With weight
859  DF  .~.~.~.~ Peripherally secured diaphragm
860  DF  .~.~.~ Annulus
526  DF  .~.~ Vacuum relief type
527  DF  .~.~ Pivoted valves
527.2  DF  .~.~.~ Head retained by removable closure
527.4  DF  .~.~.~ Valve head movably connected for accommodation to seat
527.6  DF  .~.~.~ Valve mounted on end of pipe
527.8  DF  .~.~.~ Weight biased
528  DF  .~.~ Reciprocating valves
529  DF  .~.~.~ Plural biasing means
530  DF  .~.~.~ Cam means for adjusting and fixing bias
531  DF  .~.~.~ Varying effective lever arm
532  DF  .~.~.~ Weight biased
533  DF  .~.~.~.~ Valve body is the weight
533.11  DF  .~.~.~.~.~ Ball valves
533.13  DF  .~.~.~.~.~.~ Removable cage
533.15  DF  .~.~.~.~.~.~ Separable seat
533.17  DF  .~.~.~.~.~ Guided head
533.19  DF  .~.~.~.~.~.~ Cage
533.21  DF  .~.~.~.~.~.~ Guide stem
533.23  DF  .~.~.~.~.~.~.~ With closing stop
533.25  DF  .~.~.~.~.~.~.~ Oppositely disposed
533.27  DF  .~.~.~.~.~.~.~ Head slidable on guide rod
533.29  DF  .~.~.~.~.~.~.~ Guide and seat integral unit
533.31  DF  .~.~.~.~.~.~.~ Guide and closure integral unit
534  DF  .~.~.~.~ Weight coaxial with valve
535  DF  .~.~.~ Spring biased
536  DF  .~.~.~.~ With means to protect spring from fluid
537  DF  .~.~.~.~ Spring under tension
538  DF  .~.~.~.~ Piston-type valves
539  DF  .~.~.~.~ Ball valves
539.5  DF  .~.~.~.~.~ With follower
540  DF  .~.~.~.~ Spring coaxial with valve
540.11  DF  .~.~.~.~.~ Broken valve parts retainer
541  DF  .~.~.~.~.~ Spring in inlet
542  DF  .~.~.~.~.~ Valve stem extends through fixed spring abutment
543  DF  .~.~.~.~.~.~ Yoke or cage-type support for valve stem
543.13  DF  .~.~.~.~.~ Spring abuts removable valve stem guide
543.15  DF  .~.~.~.~.~ Head slides on guide-rod concentric with spring
543.17  DF  .~.~.~.~.~ Spring guides valve head
543.19  DF  .~.~.~.~.~ Cage-type guide for stemless valves
543.21  DF  .~.~.~.~.~ Guide means integral and coplanar with valve disk
543.23  DF  .~.~.~.~.~ Head between spring and guide
544  DF  WITH MEANS FOR SEPARATING SOLID MATERIAL FROM THE FLUID
545  DF  .~ Plural separating elements
546  DF  .~ Sediment chamber
547  DF  .~ Movable strainer
549  DF  .~ Hollow strainer, fluid inlet and outlet perpendicular to each other
550  DF  .~ Planar strainer normal to flow path
551  DF  WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS
552  DF  .~ Plural
552.5  DF  .~.~ Unobvious - "combination lock" type
552.7  DF  .~ Time
553  DF  .~ Position or extent of motion indicator
554  DF  .~.~ Electrical
555  DF  .~.~ Selection from plural branches
556  DF  .~.~ Indicator element rigidly carried by the movable element whose position is indicated
556.3  DF  .~.~.~ Movable indicator element is a pointer
556.6  DF  .~.~.~.~ Pointer integral with handle
557  DF  .~ Fluid pressure responsive indicator, recorder or alarm
558  DF  .~ Liquid level responsive indicator, recorder or alarm
559  DF  .~ Inspection means
560  DF  COMBINED
561 R  DF  SYSTEMS
561 A  DF  .~ Non-valved flow dividers
562  DF  .~ Faucet connected, sink drained
563  DF  .~ Closed circulating system
564  DF  .~.~ With thermal circulating means (thermo-siphons)
564.5  DF  .~ Main line as motive fluid for follower-type feeder
565.01  DF  .~ With pump
565.11  DF  .~.~ Pumped fluid control
565.12  DF  .~.~.~ Manual
565.13  DF  .~.~.~ Fluid pressure responsive
565.14  DF  .~.~.~.~ And pilot valve
565.15  DF  .~.~.~.~ Direct response valve
565.16  DF  .~.~.~ Electric
565.17  DF  .~.~ Combined with fluid receiver
565.34  DF  .~.~.~ Reserve or surge receiver
565.18  DF  .~.~.~ Compressed air supply unit
565.19  DF  .~.~.~ Hydraulic power unit
565.37  DF  .~.~.~ Fluid sump
565.22  DF  .~.~ And jet-aspiration type pump
565.23  DF  .~.~ Vacuum pump
565.24  DF  .~.~ Resiliently mounted pump
565.25  DF  .~.~ Hand pump
565.26  DF  .~.~ Multiple inlet with multiple outlet
565.27  DF  .~.~ Downstream cyclic distributor
565.28  DF  .~.~.~ Distributor part unitary with movable pump part
565.29  DF  .~.~ Plural
565.3  DF  .~.~.~ Serial
565.31  DF  .~.~.~.~ With single motive input
565.32  DF  .~.~.~.~.~ One pump driven by motive fluid from the other
565.33  DF  .~.~.~ Parallel
565.35  DF  .~.~ With pump bypass
565.36  DF  .~.~ Drain valve actuator mounted on pump
571  DF  .~ Plural tanks or compartments connected for serial flow
572  DF  .~.~ Separable with valved-connecting passage
573  DF  .~.~ Fluid progresses by zigzag flow
574  DF  .~.~ Plural compartments formed by baffles
575  DF  .~.~ Plural top-to-bottom connected tanks
576  DF  .~.~ With communicating opening in common walls of tanks or compartments
577  DF  .~ Tank with movable or adjustable outlet or overflow pipe
577.5  DF  .~.~ Horizontally traversing outlet
578  DF  .~.~ Float-supported outlet
579  DF  .~.~ Swinging outlet pipe or spout
580  DF  .~ With running joint between movable parts of system
581  DF  .~ Movable tank
582  DF  .~ With antisplash means not in flow passage
583  DF  .~ System with plural openings, one a gas vent or access opening
584  DF  .~.~ Access and outlet
585  DF  .~.~.~ Tank access opening and bottom outlet
586  DF  .~.~.~.~ Access opening interlock or telltale on outlet valve actuator
587  DF  .~.~ Tank with gas vent and inlet or outlet
588  DF  .~.~.~ Vent and inlet or outlet in unitary mounting
589  DF  .~.~ With vented outlet
590  DF  .~ Tank with internally extending flow guide, pipe or conduit
590.5  DF  .~.~ Nondraining overflow type
591  DF  .~.~ Inverted "U" passage
592  DF  .~.~ Inlet internally extending
593  DF  .~ Head-establishing standpipe or expansion chamber (e.g., surge tanks)
624.11  DF  .~ Programmer or timer
624.12  DF  .~.~ With independent valve controller
624.13  DF  .~.~ Repeating cycle
624.14  DF  .~.~.~ Self-cycling
624.15  DF  .~.~.~ Variable
624.16  DF  .~.~.~.~ Attachable and removable element
624.17  DF  .~.~.~.~ Adjustable cam
624.18  DF  .~.~ Plural, sequential, valve actuations
624.19  DF  .~.~.~ Plural trips or trip actuations
624.2  DF  .~.~.~ Variable cycle
624.21  DF  .~.~ Clock alarm mechanism controlled
624.22  DF  .~.~ Biased latch, cam operated
624.27  DF  .~ Line condition change responsive release of valve
625  DF  .~ Multi-way valve unit
625.11  DF  .~.~ Sequential distributor or collector type
625.12  DF  .~.~ Sequentially progressive opening or closing of plural ports
625.13  DF  .~.~.~ With subsequent closing of first port
625.14  DF  .~.~.~.~ Flow combining with flow dividing
625.15  DF  .~.~.~.~ Rotary
625.16  DF  .~.~.~.~.~ Plug
625.17  DF  .~.~ Selective reciprocation or rotation
625.18  DF  .~.~ Plural noncommunicating flow paths
625.19  DF  .~.~.~ Rotary plug
625.2  DF  .~.~ Supply and exhaust
625.6  DF  .~.~.~ Pilot-actuated
625.61  DF  .~.~.~.~ Variable orifice-type modulator
625.62  DF  .~.~.~.~.~ Opposed orifices; interposed modulator
625.63  DF  .~.~.~.~ Common to plural valve motor chambers
625.64  DF  .~.~.~.~ Electric
625.65  DF  .~.~.~ Motor-operated
625.66  DF  .~.~.~.~ Fluid motor
625.21  DF  .~.~.~ Rotary valve
625.22  DF  .~.~.~.~ Plug type
625.23  DF  .~.~.~.~.~ For plural lines
625.24  DF  .~.~.~.~.~ Axial and radial flow
625.25  DF  .~.~.~ Reciprocating valve
625.26  DF  .~.~.~.~ Combined disk or plug and gate or piston
625.27  DF  .~.~.~.~ Plural disk or plug
625.67  DF  .~.~.~.~ Piston valve
625.68  DF  .~.~.~.~.~ With internal flow passage
625.69  DF  .~.~.~.~.~ With annular passage (e.g., spool)
625.28  DF  .~.~ Dividing into parallel flow paths with recombining
625.29  DF  .~.~.~ Valve with bypass connections
625.3  DF  .~.~.~ With metering feature
625.31  DF  .~.~.~ Rotary
625.32  DF  .~.~.~.~ Plug
625.33  DF  .~.~.~ Reciprocating
625.34  DF  .~.~.~.~ Spool
625.35  DF  .~.~.~.~.~ With internal passage
625.36  DF  .~.~.~.~.~ Unequal heads
625.37  DF  .~.~.~.~ Piston
625.38  DF  .~.~.~.~.~ With internal flow passage
625.39  DF  .~.~.~.~.~.~ Sequential opening or closing of serial ports in single flow line
625.4  DF  .~.~ Multiple inlet with single outlet
625.41  DF  .~.~.~ Rotary valve
625.42  DF  .~.~ Selective opening of plural ports
625.43  DF  .~.~ Four port reversing valves
625.44  DF  .~.~ Pivoted valve unit
625.45  DF  .~.~.~ Gate
625.46  DF  .~.~ Rotary valve unit
625.47  DF  .~.~.~ Plug
625.48  DF  .~.~ Reciprocating valve unit
625.49  DF  .~.~.~ Combined disk or plug and gate or piston
625.5  DF  .~.~.~ Plural disk or plug
626  DF  .~ Plural petcocks
627  DF  .~ Sequential distributor or collector type
627.5  DF  .~ Sequentially closing and opening alternately seating flow controllers
628  DF  .~ Sequentially progressive opening or closing of plural valves
629  DF  .~.~ Pressure equalizing or auxiliary shunt flow
630  DF  .~.~.~ One valve seats against other valve (e.g., concentric valves)
630.11  DF  .~.~.~.~ Locomotive throttle
630.12  DF  .~.~.~.~ Gate
630.13  DF  .~.~.~.~ With balancing chamber
630.14  DF  .~.~.~.~ First valve moves second valve
630.15  DF  .~.~.~.~ Actuator moves both valves
630.16  DF  .~.~ With subsequent closing of first opened port
630.17  DF  .~.~.~ Simultaneously moved port controllers
630.18  DF  .~.~ Screw-actuated differential valves
630.19  DF  .~.~ Lost motion
630.2  DF  .~.~.~ Cam determines sequence
630.21  DF  .~.~.~ Rotary concentric valves
630.22  DF  .~.~.~ First valve actuates second valve
635  DF  .~ With preselecting means for plural valve actuator
636  DF  .~ With selective motion for plural valve actuator
636.1  DF  .~.~ Oppositely movable cam surfaces
636.2  DF  .~.~ Rotation about either of two pivotal axes
636.3  DF  .~.~ Rotation of actuator arm about its pivot and its axis
636.4  DF  .~.~ Reciprocation along and rotation about same axis
637  DF  .~ Valves with separate, correlated, actuators
637.05  DF  .~.~ Correlated across separable flow path joint
637.1  DF  .~.~ Interlocked
637.2  DF  .~.~ Coaxial stems
637.3  DF  .~.~.~ Rotary
637.4  DF  .~.~.~.~ And reciprocating
637.5  DF  .~.~.~.~ Concentric, central valve removable
594  DF  .~ Plural noncommunicating flow paths
595  DF  .~.~ With common valve operator
596  DF  .~ Supply and exhaust
596.12  DF  .~.~ With bypass
596.13  DF  .~.~.~ Controlled by supply or exhaust valve
596.14  DF  .~.~ Pilot-actuated
596.15  DF  .~.~.~ Common to plural valve motor chambers
596.16  DF  .~.~.~ Electric
596.17  DF  .~.~ Motor
596.18  DF  .~.~.~ Fluid motor
596.1  DF  .~.~ Biased exhaust valve
596.2  DF  .~.~.~ Biased closed
597  DF  .~ Multiple inlet with multiple outlet
598  DF  .~ Hydraulic brake line (e.g., hill holders)
599  DF  .~ Dividing into parallel flow paths with recombining
599.1  DF  .~.~ Flow passage with bypass connections
599.2  DF  .~.~ Second valve assembly carried by first valve head
600  DF  .~.~ With foam controlling means (e.g., beer, soda faucets)
601  DF  .~.~ With common operator for valve in each path
602  DF  .~ Multiple inlet with single outlet
603  DF  .~.~ Faucet attachment
888  DF  .~.~ Combining by aspiration
889  DF  .~.~.~ Combining of three or more diverse fluids
890  DF  .~.~.~ Plural motivating fluid jets
891  DF  .~.~.~ Flow control by varying position of a fluid inlet relative to entrainment chamber
892  DF  .~.~.~ With selectively operated flow control means in inlet
893  DF  .~.~.~.~ Flow control means is located in aspirated fluid inlet
894  DF  .~.~.~.~.~ Single actuator operates flow control means located in both motivating fluid and aspirated fluid inlets
895  DF  .~.~.~ With condition responsive valve
896  DF  .~.~ With means to promote mixing or combining of plural fluids
897  DF  .~.~.~ With selectively operated flow control means
898  DF  .~.~.~.~ Single actuator operates plural flow control means
605  DF  .~.~ With flow control
606  DF  .~.~.~ Valve in each inlet
607  DF  .~.~.~.~ With common valve operator
861  DF  .~ With flow control means for branched passages
862  DF  .~.~ With common valve operator
863  DF  .~.~.~ For valve having a flexible diaphragm valving member
864  DF  .~.~.~ For valve having a ball head
865  DF  .~.~.~ With gearing
866  DF  .~.~.~ Threaded actuator
867  DF  .~.~.~ Pivoted or rotary motion converted to reciprocating valve head motion
868  DF  .~.~.~.~ Spring biased
869  DF  .~.~.~ Having fluid actuator
870  DF  .~.~.~ With electrical actuation
871  DF  .~.~.~ Spring biased
872  DF  .~.~ With valve or movable deflector at junction
873  DF  .~.~.~ Movable deflector spout in lateral port
874  DF  .~.~.~ Valve or deflector is tubular passageway
875  DF  .~.~.~ Pivoted valve or deflector
876  DF  .~.~.~ Rotary valve or deflector
877  DF  .~.~ Biased valved
878  DF  .~.~.~ Spring bias
879  DF  .~.~.~.~ For valve having a ball head
880  DF  .~.~.~.~ With threaded actuator
881  DF  .~.~.~.~ Spring coaxial with valve
882  DF  .~.~.~.~.~ Biased open
883  DF  .~.~ Single inlet with multiple distinctly valved outlets
884  DF  .~.~ Sectional block structure
885  DF  .~.~ With fluid actuator
886  DF  .~.~ With threaded actuator
887  DF  .~.~ Containing rotary valve
613  DF  .~ Flow path with serial valves and/or closures
614  DF  .~.~ Separable flow path section, valve or closure in each
614.01  DF  .~.~.~ Common joint and valve seat faces, or sections joined by closing members
614.02  DF  .~.~.~ Each valve and/or closure operated by coupling motion
614.03  DF  .~.~.~.~ Linear motion of flow path sections operates both
614.04  DF  .~.~.~.~.~ Valves actuate each other
614.05  DF  .~.~.~ Valve- or closure-operated by coupling motion
614.06  DF  .~.~.~ Coupling interlocked with valve, or closure or actuator
614.11  DF  .~.~ Common actuator
614.12  DF  .~.~.~ Delivery cock with terminal valve
614.13  DF  .~.~.~ Alternately seating
614.14  DF  .~.~.~.~ Biased valve
614.15  DF  .~.~.~ Opposed screw
614.16  DF  .~.~ One valve head provides seat for other head
614.17  DF  .~.~.~ Also carries head of other valve
614.18  DF  .~.~ One valve head carries other valve head
614.19  DF  .~.~ Biased valve with external operator
614.2  DF  .~.~ Direct response normally closed valve limits direction of flow
614.21  DF  .~.~ Coaxial oppositely directed seats
615  DF  .~ Articulated or swinging flow conduit
616  DF  .~.~ Actuates valve
616.3  DF  .~.~.~ Plural motions of valve
616.5  DF  .~.~.~ Reciprocating valve
616.7  DF  .~.~.~ Rotary valve
797  DF  FRANGIBLE
798  DF  WITH COUPLING
799  DF  .~ Flexible
800  DF  WITH CLOSURE
801  DF  FAUCETS AND SPOUTS
802  DF  MISCELLANEOUS
******************************
CROSS-REFERENCE ART COLLECTIONS
******************************
900  DF  BUMPLESS MANUAL TO AUTOMATIC RELAYS
901  DF  BIASED BALL VALVES WITH OPERATORS
902  DF  SLUSH PUMP CHECK VALVES
903  DF  RUBBER VALVE SPRINGS
904  DF  CUSHION CHECK VALVES
905  DF  ROTARY VALVES FOR MULTIPLE GAS BURNERS
906  DF  VALVES BIASED BY FLUID "SPRINGS"
907  DF  VACUUM-ACTUATED VALVES
908  DF  RESPIRATOR CONTROL
909  DF  MAGNETIC FLUID VALVE
910  DF  DESTRUCTIBLE OR DEFORMABLE ELEMENT CONSTRUCTED OF SPECIFIC MATERIAL