Patent US4549641A successfully refreshed from Google Patents.
US4549641A
Expired / Lapsed
US
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Clutch disc
Assignee: Toyota Motor Corp
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Filing: 1982-08-06
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Granted: 1985-10-29
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Expires: 2002-08-06
Abstract
Abstract Disclosed herein is a clutch disc comprising a thrust plate incorporated between the first frictional plate, which is interposed between the subdisc plate and the hub flange, and the hub flange, so as to rotate relatively to the hub flange within the range of slight angular displacement corresponding to the amount of play defined between the pawl portion of the thrust plate and the cutaway portion of the aperture opened through the hub flange, and a frictional plate fixed to the thrust plate on the flange side, said frictional plate having a smaller frictional coefficient than the first frictional plate.
Inventors
- 👤 Hisao Ootani
- 👤 Satoru Maruyamano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:27
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/12; F16F15/129
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
In a clutch disc having a circular hub, a circular hub flange fixed on the outer periphery of said hub, a disc plate disposed on one side of said flange, a subdisc plate disposed on the other side of said flange, said disc plate being connected to said subdisc plate by stopper pins at the outer peripheral portions thereof, and said disc plate and said subdisc plate determining a play angle A; an improvement comprising a first frictional plate connected to said subdisc plate so as to rotate therewith, a thrust plate disposed between saib hub flange and said first frictional plate and connected to saib hub flange so as to rotate up to a play angle B relative thereto, said play angle A being larger than said play angle B, an elastic means disposed between said first frictional plate and said subdisc plate for pressing said first frictional plate toward said thrust plate, and a second frictional plate attached to said thrust plate on the hub flange side, said second frictional plate having a smaller frictional coefficient than said first frictional plate.
Claim 2
Dependent Claim
183 words
In a clutch disc having a circular hub, a circular hub flange fixed on the outer periphery of said hub, a disc plate disposed on one side of said flange, a subdisc plate disposed on the other side of said flange, said disc plate being connected to said subdisc plate by stopper pins at the outer peripheral portions thereof, and said disc plate and said subdisc plate determining a play angle A; an improvement comprising a first frictional plate connected to said subdisc plate so as to rotate therewith, a thrust plate disposed between saib hub flange and said first frictional plate and connected to saib hub flange so as to rotate up to a play angle B relative thereto, said play angle A being larger than said play angle B, an elastic means disposed between said first frictional plate and said subdisc plate for pressing said first frictional plate toward said thrust plate, and a second frictional plate attached to said thrust plate on the hub flange side, said second frictional plate having a smaller frictional coefficient than said first frictional plate.
Claim 3
Dependent Claim
16 words
The clutch disc as defined in claim 1 wherein said elastic means is a Belleville spring.
Claim 4
Dependent Claim
23 words
The clutch disc as defined in claim 1 wherein said first frictional plate is connected through a backing plate to said subdisc plate.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |