| | CLASS NOTES |
| 1 | DF | CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22} |
| 48 | DF | ELECTRICAL OR GETTER TYPE {3} |
| 52 | DF | EXPANSION AND CONTRACTION OF PUMP FLUID |
| 53 | DF | PROCESSES {1} |
| 56 | DF | DRILLED WELL FREE PISTON-TYPE PUMP {4} |
| 61 | DF | BUOYANTLY SUPPORTED |
| 62 | DF | ALTERNATE SERIES OR PARALLEL OPERATION OF PLURAL PUMPS |
| 63 | DF | WITH SIGNAL, INDICATOR, OR INSPECTION MEANS |
| 64 | DF | GAS PRESSURE EXCHANGE USING ROTARY CELLULAR CONVEYOR |
| 65 | DF | ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10} |
| 199.1 | DF | DIVERSE PUMPS {5} |
| 207 | DF | BY HEATING OF PUMPED FLUID {1} |
| 210 | DF | PUMP FLUID BIASED OVERCENTER LOAD EQUALIZER |
| 211 | DF | INERTIA-TYPE PUMPING MEMBER OR DRIVE MEANS |
| 211.5 | DF | LIQUID LEVEL RESPONSIVE CONTROL OF DISPLACEMENT, VOLUMETRIC CAPACITY, OR DRIVE TRANSMISSION |
| 212 | DF | CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT {7} |
| 225 | DF | INTENSIFIER {1} |
| 228 | DF | WITH CONDITION RESPONSIVE CONTROL OF COOLANT OR LUBRICANT |
| 229 | DF | OPERATED BY ART DEVICE {2} |
| 234 | DF | AMBULANT, BODY SUPPORTED, OR WITH CARRYING HANDLE {1} |
| 236 | DF | CONVERTIBLE TO APPARATUS OF A DIFFERENT CLASS {1} |
| 238 | DF | CHANGEABLE BY ASSEMBLY OR DISASSEMBLY {1} |
| 240 | DF | INERTIA LIQUID PISTON (E.G., MOMENTUM, ETC.) {1} |
| 242 | DF | POSITION RESPONSIVE BYPASS BETWEEN PLURAL PUMP CHAMBERS |
| 243 | DF | WITH INTERCOOLER |
| 244 | DF | SUCCESSIVE STAGES {8} |
| 269 | DF | THREE OR MORE CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {4} |
| 274 | DF | CONDITION RESPONSIVE VARIABLE VOLUMETRIC CAPACITY EXPANSIBLE CHAMBER PUMP (I.E., CLEARANCE CONTROL) {1} |
| 278 | DF | EXTERNAL CONDITION RESPONSIVE PUMPED FLUID CONTROL |
| 279 | DF | WITH CONDITION RESPONSIVE PUMPED FLUID CONTROL {22} |
| 312 | DF | WITH MUFFLER ACTING ON PUMP FLUID |
| 313 | DF | COMBINED |
| 314 | DF | SINGLE ACTING CHANGEABLE TO OR FROM DOUBLE ACTING |
| 315 | DF | REVERSE FLOW WITH UNIDIRECTIONAL DRIVE OR UNIDIRECTIONAL FLOW WITH REVERSE DRIVE |
| 316 | DF | CORRELATED PUMP AND MOTOR OR CLUTCH CONTROL {1} |
| 319 | DF | INCLUDING DISENGAGEABLE ROTARY OR FRANGIBLE DRIVE CONNECTION |
| 320 | DF | SERIALLY FORMED PUMPING CHAMBERS (E.G., ENDLESS) |
| 321 | DF | MOTOR DRIVEN {32} |
| 425 | DF | SEPARATE MANUAL AND POWER DRIVEN PUMPING MEMBERS |
| 426 | DF | PLURAL PUMPS WITH INDIVIDUAL OR RELATIVE CONTROL {3} |
| 430 | DF | INCLUDING MEANS TO (1) AGITATE PUMP FLUID, OR (2) PREVENT FOREIGN MATERIAL SETTLING FROM PUMP FLUID {1} |
| 432 | DF | INCLUDING APPLICATION OF SEPARATE FLUID TO PUMP VALVE {1} |
| 434 | DF | INCLUDING SEPARATE PORT ON NONCYCLIC VALVE FOR DRAINING PUMP PORTION |
| 435 | DF | INCLUDING SEPARATE PORT ON NONCYCLIC VALVE FOR VENTING OR FILLING PUMP PORTION |
| 436 | DF | TRANSVERSELY MOVABLE IMPELLING MEMBER (E.G., PADDLE) |
| 437 | DF | EXPANSIBLE CHAMBER TYPE {40} |
| 572 | DF | MISCELLANEOUS |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 900 | DF | SLURRY PUMPS (E.G., CONCRETE) |
| 901 | DF | CRYOGENIC PUMPS |
| 902 | DF | HERMETICALLY SEALED MOTOR PUMP UNIT |
| 903 | DF | TREADLE OPERATED |
| 904 | DF | WELL PUMP DRIVEN BY FLUID MOTOR MOUNTED ABOVE GROUND |
| | ****************************** |
| | DIGEST |
| | ****************************** |
| DIG 1 | DF | Materials digest |
