US3786688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable ratio belt-type transmission having improved driven pulley
Assignee: Griffon Corp
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Filing: 1973-04-16
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Granted: 1974-01-22
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Expires: 1993-04-16
Abstract
Abstract A variable ratio belt-type transmission. The transmission transmits power from a driving shaft of the engine to a driven shaft of the cycle when the engine is running, and transmits pedal-generated power from the driven shaft to the driving shaft to start the engine when it is not running.
Inventors
- 👤 B Svenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:57
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/662; F16H61/66231; F16H61/66245; B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; F02; F02N; F02N15/00; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H61/66227
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
186 words
In a variable ratio belt-type transmission for transmitting power between a driving shaft and a driven shaft through a belt, the combination of: a. a variable pitch diameter driving pulley for mounting on such driving shaft and comprising two coaxial, relatively axially movable, generally frusto-conical driving pulley members between which such belt is passed; and b. a variable pitch diameter driven pulley for mounting on such driven shaft and comprising 1. two coaxial, relatively axially movable, generally frustoconical driven pulley members between which such belt is also passed, one of said driven pulley members being fixed and the other being movable relative to the fixed one in an axial direction, 2. the movable driven pulley member comprising a plurality of circumferentially spaced cams, each comprising a ramp surface, and 3. a spring for mounting on such driven shaft and comprising a plurality of circumferentially spaced, radially extending spring arms, each arm having an outer end bearing on one of said circumferentially spaced ramp surfaces, said spring normally applying a spring force on said ramps forcing the movable driven pulley member toward the fixed driven pulley member.
Claim 2
Dependent Claim
186 words
In a variable ratio belt-type transmission for transmitting power between a driving shaft and a driven shaft through a belt, the combination of: a. a variable pitch diameter driving pulley for mounting on such driving shaft and comprising two coaxial, relatively axially movable, generally frusto-conical driving pulley members between which such belt is passed; and b. a variable pitch diameter driven pulley for mounting on such driven shaft and comprising 1. two coaxial, relatively axially movable, generally frustoconical driven pulley members between which such belt is also passed, one of said driven pulley members being fixed and the other being movable relative to the fixed one in an axial direction, 2. the movable driven pulley member comprising a plurality of circumferentially spaced cams, each comprising a ramp surface, and 3. a spring for mounting on such driven shaft and comprising a plurality of circumferentially spaced, radially extending spring arms, each arm having an outer end bearing on one of said circumferentially spaced ramp surfaces, said spring normally applying a spring force on said ramps forcing the movable driven pulley member toward the fixed driven pulley member.
Claim 3
Dependent Claim
18 words
the movable driven pulley member comprising a plurality of circumferentially spaced cams, each comprising a ramp surface, and
Claim 4
Dependent Claim
18 words
the movable driven pulley member comprising a plurality of circumferentially spaced cams, each comprising a ramp surface, and
Claim 5
Dependent Claim
37 words
In a variable ratIo belt-type transmission according to claim 1 comprising a sleeve affixed to said fixed driven pulley member for mounting on such driven shaft, the movable driven pulley member being rotatably mounted on said sleeve.
Claim 6
Dependent Claim
22 words
In a variable ratio belt-type transmission according to claim 2 comprising a hub rotatably mounting said movable pulley member on said sleeve.
Claim 7
Dependent Claim
56 words
a spring for mounting on such driven shaft and comprising a plurality of circumferentially spaced, radially extending spring arms, each arm having an outer end bearing on one of said circumferentially spaced ramp surfaces, said spring normally applying a spring force on said ramps forcing the movable driven pulley member toward the fixed driven pulley member.
Claim 8
Dependent Claim
56 words
a spring for mounting on such driven shaft and comprising a plurality of circumferentially spaced, radially extending spring arms, each arm having an outer end bearing on one of said circumferentially spaced ramp surfaces, said spring normally applying a spring force on said ramps forcing the movable driven pulley member toward the fixed driven pulley member.
Claim 9
Dependent Claim
29 words
In a variable ratio belt-type transmission according to claim 2 wherein said spring comprises a central opening affixed to said sleeve and through which such driven shaft may extend.
Claim 10
Dependent Claim
35 words
In a variable ratio belt-type transmission according to claim 4 comprising a threaded member for threading engagement with threads on such driven shaft and for securing said spring in an axial direction against said sleeve.
Claim 11
Dependent Claim
67 words
In a variable ratio belt-type transmission according to claim 5 wherein the central opening of said spring has a smaller opening than the outside of the first named sleeve and comprising a further sleeve having a larger outer surface than said central opening and positioned in between said threaded member and spring for engagement therebetween and for securing said spring in place against the first named sleeve.
Claim 12
Dependent Claim
28 words
In a variable ratio belt-type transmission according to claim 1 wherein said ramps are evenly spaced and symmetrically curved about the axis of rotation of said driven pulley.
Claim 13
Dependent Claim
50 words
In a variable ratio belt-type transmission according to claim 7 comprising a stop at one end of each ramp, the ramps each extending from a ramp position adjacent each stop toward the fixed driven pulley member to a ramp position which is further away from said fixed driven pulley member.
Claim 14
Dependent Claim
136 words
A variable pitch diameter driven pulley belt drive for mounting on a shaft, comprising: a. two coaxial, relatively axially movable, generally frusto-conical driven pulley members for mounting on such shaft and between which a belt is passed, one of said driven pulley members being fixed and the other being movable relative to the fixed one in an axial direction; b. said movable driven pulley member comprising a plurality of circumferentially spaced cams, said cams each comprising a ramp surface; and c. a spring for mounting on such shaft and comprising a plurality of circumferentially spaced, radially extending spring arms, each arm having an outer end bearing on one of said circumferentially spaced ramp surfaces, said spring normally applying spring force on said ramp surface forcing the movable driven pulley member toward the fixed arm pulley member.
Claim 15
Dependent Claim
136 words
A variable pitch diameter driven pulley belt drive for mounting on a shaft, comprising: a. two coaxial, relatively axially movable, generally frusto-conical driven pulley members for mounting on such shaft and between which a belt is passed, one of said driven pulley members being fixed and the other being movable relative to the fixed one in an axial direction; b. said movable driven pulley member comprising a plurality of circumferentially spaced cams, said cams each comprising a ramp surface; and c. a spring for mounting on such shaft and comprising a plurality of circumferentially spaced, radially extending spring arms, each arm having an outer end bearing on one of said circumferentially spaced ramp surfaces, said spring normally applying spring force on said ramp surface forcing the movable driven pulley member toward the fixed arm pulley member.
Claim 16
Dependent Claim
35 words
A driven pulley belt drive according to claim 1 comprising a sleeve affixed to said fixed driven pulley member for mounting on such shaft, the movable driven pulley member being rotatably mounted on said sleeve.
Claim 17
Dependent Claim
21 words
A driven pulley belt drive according to claim 10 comprising a hub rotatably mounting said movable pulley member on said sleeve.
Claim 18
Dependent Claim
27 words
A driven pulley belt drive according to claim 10 wherein said spring comprises a central opening affixed to said sleeve and through which such shaft may extend.
Claim 19
Dependent Claim
33 words
A driven pulley belt drive according to claim 12 comprising a threaded member for threading engagement with threads on such shaft and for securing said spring in an axial direction against said sleeve.
Claim 20
Dependent Claim
66 words
A driven pulley belt drive according to claim 13 wherein the central opening of said spring has a smaller opening than the outside of the first named sleeve and comprising a further sleeve having a larger outer surface than said central opening and positioned in between said threaded member and spring for engagement therebetween and for securing said spring in place against the first named sleeve.
Claim 21
Dependent Claim
27 words
A driven pulley belt drive according to claim 9 wherein said ramps are evenly spaced and symmetrically curved about the axis of rotation of said driven pulley.
Claim 22
Dependent Claim
49 words
A driven pulley belt drive according to claim 15 comprising a stop at one end of each ramp, the ramps each extending from a ramp position adjacent each stop tOward the fixed driven pulley member to a ramp position which is further away from said fixed driven pulley member.
Claim 23
Dependent Claim
180 words
A variable pitch diameter driven pulley belt drive for mounting on a shaft, comprising: a. two coaxial, relatively axially movable, generally frusto-conical driven pulley members for mounting on such shaft and between which a belt is passed, one of said driven pulley members being fixed and the other being movable relative to the fixed one in an axial direction; b. a sleeve affixed to and coaxial with said fixed driven pulley member; c. said movable driven pulley member comprising a hub rotatably mounted and axially slidable on said sleeve; d. said movable drive pulley member comprising a plurality of evenly circumferentially spaced cams, each comprising a ramp surface, said ramp surfaces being curved symmetrically about the axis of rotation of said driven pulley; e. a spring comprising a plurality of evenly circumferentially spaced, radially extending arms, each arm having an outer end bearing on one of said ramp surfaces and normally applying a force on such ramp surface, forcing the movable driven pulley member towards the fixed driven pulley member; and f. means for affixing said spring to said sleeve.
Claim 24
Dependent Claim
180 words
A variable pitch diameter driven pulley belt drive for mounting on a shaft, comprising: a. two coaxial, relatively axially movable, generally frusto-conical driven pulley members for mounting on such shaft and between which a belt is passed, one of said driven pulley members being fixed and the other being movable relative to the fixed one in an axial direction; b. a sleeve affixed to and coaxial with said fixed driven pulley member; c. said movable driven pulley member comprising a hub rotatably mounted and axially slidable on said sleeve; d. said movable drive pulley member comprising a plurality of evenly circumferentially spaced cams, each comprising a ramp surface, said ramp surfaces being curved symmetrically about the axis of rotation of said driven pulley; e. a spring comprising a plurality of evenly circumferentially spaced, radially extending arms, each arm having an outer end bearing on one of said ramp surfaces and normally applying a force on such ramp surface, forcing the movable driven pulley member towards the fixed driven pulley member; and f. means for affixing said spring to said sleeve.
Claim 25
Dependent Claim
49 words
A driven pulley belt drive according to claim 17 comprising a stop at one end of each ramp, the ramps each extending from a ramp position adjacent each stop toward the fixed driven pulley member to a ramp position which is further away from said fixed driven pulley member.
Claim 26
Dependent Claim
27 words
A driven pulley belt drive according to claim 17 wherein said spring comprises a central opening affixed to said sleeve and through which such shaft may extend.
Claim 27
Dependent Claim
33 words
A driven pulley belt drive according to claim 19 comprising a threaded member for threading engagement with threads on such shaft and for securing said spring in an axial direction against said sleeve.
Claim 28
Dependent Claim
66 words
A driven pulley belt drive according to claim 20 wherein the central opening of said spring has a smaller opening than the outside of the first named sleeve and comprising a further sleeve having a larger outer surface than said central opening and positioned in between said threaded member and spring for engagement therebetween and for securing said spring in place against the first named sleeve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |