Patent US3850277A successfully refreshed from Google Patents.
US3850277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch assembly
Assignee: Daikin Seisakusho KK
•
Filing: 1972-12-29
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Granted: 1974-11-26
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Expires: 1992-12-29
Abstract
Abstract A clutch in which there is provided a clutch disc having clutch facings made of cerametallic or like material, a flywheel having a friction surface to be brought into frictional contact with one of the facings, and a pressure plate supported by a clutch cover for conjoint rotation with the flywheel and urged in a direction to press the facing against the flywheel, with the pressure plate having a friction surface to be brought into frictional contact with the other facing. Segments made of heat-treated hard steel plate are fixed to each of the flywheel and the pressure plate to provide the friction surface thereof.
Inventors
- 👤 K Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:43
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D13/70; F16D69/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A clutch assembly comprising a clutch disc having clutch facings made of cerametallic or like material, a flywheel having a friction surface to be brought into frictional contact with one of the facings, the friction surface including separate segments made of heat-treated hard steel plate and fixed to the flywheel, and a pressure plate urged in a direction to press the facing against the friction surface of the flywheel, a clutch cover supporting said pressure plate for conjoint rotation with the flywheel, the pressure plate having a friction surface to be brought into frictional contact with the other facing, and the second-mentioned friction surface including separate segments made of heat-treated hard steel plate and fixed to the pressure plate thereby improving the durability of the friction surfaces of the flywheel and the pressure plate.
Claim 2
Dependent Claim
134 words
A clutch assembly comprising a clutch disc having clutch facings made of cerametallic or like material, a flywheel having a friction surface to be brought into frictional contact with one of the facings, the friction surface including separate segments made of heat-treated hard steel plate and fixed to the flywheel, and a pressure plate urged in a direction to press the facing against the friction surface of the flywheel, a clutch cover supporting said pressure plate for conjoint rotation with the flywheel, the pressure plate having a friction surface to be brought into frictional contact with the other facing, and the second-mentioned friction surface including separate segments made of heat-treated hard steel plate and fixed to the pressure plate thereby improving the durability of the friction surfaces of the flywheel and the pressure plate.
Claim 3
Dependent Claim
37 words
The clutch assembly as set forth in claim 1 wherein the segments fixed to each of the flywheel and pressure plate are in the form of a suitable number of divided pieces arranged in its circumferential direction.
Claim 4
Dependent Claim
47 words
The clutch assembly as set forth in claim 1 wherein the segments fixed to each of the flywheel and pressure plate are in the form of a suitable number of divided pieces arranged in its circumferential direction, with radially extending air flow grooves provided between the segments.
References Cited (Backward Citations)
US2163884A
Cited
US2885047A
Cited
US3161260A
Cited
US3221853A
Cited
US3191734A
Cited
US3298476A
Cited
US3329246A
Cited
US3318424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |