US Patent Class 476
FRICTION GEAR TRANSMISSION SYSTEMS OR COMPONENTS



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  CONDITION RESPONSIVE RATIO CHANGE
2  DF  .~ Fluid control
3  DF  .~.~ And electric or magnetic control
4  DF  .~ Electric or magnetic control
5  DF  .~ Centrifugal actuator
6  DF  RATIO CHANGE BY EXPANSION OR COMPRESSION OF FLEXIBLE FRICTION SURFACE
7  DF  WITH FRICTION ENHANCING FLUID
8  DF  WITH LUBRICATION
9  DF  FLUID CONTROL
10  DF  .~ Of toroidal transmission
11  DF  ELECTRIC OR MAGNETIC CONTROL
12  DF  WITH INDICATOR OR ALARM
13  DF  CYCLICAL OUTPUT
14  DF  WITH TRANSMISSION COOLING OR HEATING MEANS
15  DF  FORWARD AND REVERSE
16  DF  .~ Flexible belt in drive train
17  DF  .~.~ Drive in one direction by direct engagement of belt pulleys
18  DF  .~ Variable speed in forward or reverse
19  DF  .~.~ With toothed gears in drive train
20  DF  .~.~ Stepped ratio change
21  DF  .~.~ Intermediate idler between input and output gears
22  DF  .~.~.~ Idler between conoidal gears
23  DF  .~.~.~ Idler between flat discs
24  DF  .~.~ Driving and driven gears on perpendicular axes
25  DF  .~ Drive in forward direction by direct clutch
26  DF  .~ Driving and driven gears on angularly related axes
27  DF  PLURAL GEARING IN SERIES
28  DF  .~ Flexible belt in drive train
29  DF  .~.~ Friction gearing is ratio change gearing
30  DF  .~.~.~ Friction gearing is stepless ratio change
31  DF  .~ Plural friction gearing in series
32  DF  .~.~ Ratio change gearing and nonratio change gearing
33  DF  .~ Friction gearing is ratio change gearing
34  DF  .~ One gear is toothed bevel gear
35  DF  .~ One gear is worm gear
36  DF  FRICTION GEAR IS BALL
37  DF  .~ With condition responsive means to vary contact pressure
38  DF  .~ Variable ratio
39  DF  FRICTION GEAR INCLUDES IDLER ENGAGING FACING CONCAVE SURFACES
40  DF  .~ Toroidal
41  DF  .~.~ With condition responsive means to vary contact pressure
42  DF  .~.~ Plural toric cavities
43  DF  .~.~ Including threaded means to adjust idler
44  DF  .~.~ Including toothed gearing to adjust idler
45  DF  .~.~ Including spring means to bias friction surfaces into engagement
46  DF  .~.~ Idler supported by roller bearing
47  DF  STEPLESS RATIO CHANGE
48  DF  .~ With condition responsive means to vary contact pressure
49  DF  .~ Plural interdigitated disks on parallel axes
50  DF  .~ Intermediate idler between driving and driven gears
51  DF  .~.~ Idler between conoidal gears
52  DF  .~.~.~ Idler is ring
53  DF  .~.~.~.~ Rigid
54  DF  .~.~ Idler between flat disks
55  DF  .~ Driving and driven gears on nonlinear angularly related axes
56  DF  .~.~ Perpendicular
57  DF  .~.~.~ Disc and wheel
58  DF  .~.~.~.~ Disc on input shaft
59  DF  STEPPED RATIO CHANGE
60  DF  .~ Stepped motor shaft
61  DF  CONDITION RESPONSIVE MEANS TO VARY CONTACT PRESSURE
62  DF  .~ Centrifugal actuator
63  DF  .~ Ball actuator
64  DF  FRICTION GEAR ON SHAFT OF MOVABLY MOUNTED MOTOR
65  DF  SPRING URGES CONTACTING GEARS INTO ENGAGEMENT
66  DF  .~ Coil spring
67  DF  FRICTION TRANSMISSION OR ELEMENT
68  DF  .~ Friction gears on nonlinear angularly related axes
69  DF  .~.~ Perpendicular axes
70  DF  .~ Roller bearing between gear and support
71  DF  .~ Flexible drive shaft
72  DF  .~ Particular friction surface
73  DF  .~.~ Metallic
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