Manual of U.S. Patent Classification
as of June 30, 2000

Class
476
FRICTION GEAR TRANSMISSION SYSTEMS OR COMPONENTS

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

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

Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231

tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

---

Last Modified: 6 October 2000