Patent US3712436A successfully refreshed from Google Patents.
US3712436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch plate spring with pivot rings
Assignee: Valeo SE
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Filing: 1971-12-03
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Granted: 1973-01-23
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Expires: 1991-12-03
Abstract
Abstract A clutch of the kind comprising a diaphragm acting between a cover and a clamping-plate and rockably mounted on said cover by means of a plurality of small pillars fixed on said cover, in cooperation with supporting means extending, at least in part, over two circumferences enclosing all said pillars, one of said supporting means being mounted between the diaphragm and the cover while the other supporting means is a keeper-ring mounted on the other side of said diaphragm, in which said keeper-ring comprises at least one flattened portion adapted to co-operate with the head of an associated pillar, said flattened portion being limited circumferentially by lateral stop flanks which lock said keeper-ring against rotation. The device is intended to prevent wear of the keeper-ring.
Inventors
- 👤 M Rist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/583; F16D13/585
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A clutch of the kind comprising a diaphragm acting between a cover and a clamping plate and rockably mounted on said cover by means of a plurality of small pillars fixed on said cover, in cooperation with supporting means extending, at least in part, over two circumferences enclosing all said pillars, one of said supporting means being mounted between the diaphragm and the cover while the other supporting means is a keeper-ring mounted on the other side of said diaphragm, in which said keeper-ring comprises at least one flattened portion adapted to co-operate with the head of a pillar, said flattened portion being limited circumferentially by lateral stop flanks which ensure the locking of said keeper-ring for rotation.
Claim 2
Dependent Claim
118 words
A clutch of the kind comprising a diaphragm acting between a cover and a clamping plate and rockably mounted on said cover by means of a plurality of small pillars fixed on said cover, in cooperation with supporting means extending, at least in part, over two circumferences enclosing all said pillars, one of said supporting means being mounted between the diaphragm and the cover while the other supporting means is a keeper-ring mounted on the other side of said diaphragm, in which said keeper-ring comprises at least one flattened portion adapted to co-operate with the head of a pillar, said flattened portion being limited circumferentially by lateral stop flanks which ensure the locking of said keeper-ring for rotation.
Claim 3
Dependent Claim
22 words
A clutch as claimed in claim 1, in which said ring is provided with as many flattened portions as there are pillars.
Claim 4
Dependent Claim
41 words
A clutch as claimed in claim 1, in which the lateral stop flanks of each flattened portion of said ring converge towards each other parallel to the plane of said ring and in the direction of the exterior of said ring.
Claim 5
Dependent Claim
28 words
A clutch as claimed in claim 3, in which said lateral stop flanks of a flattened portion form with each other an angle in the vicinity of 90*.
Claim 6
Dependent Claim
28 words
A clutch as claimed in claim 1, in which said lateral stop flanks of a flattened portion are substantially tangential to the body of the associated small pillar.
Claim 7
Dependent Claim
36 words
A clutch as claimed in claim 1, in which said lateral stop flanks of a flattened portion diverge from each other in a direction perpendicular to the plane of said ring, starting from said flattened portion.
Claim 8
Dependent Claim
44 words
A diaphragm clutch as claimed in claim 1, in which said flattened portions are formed by a punching operation applied to said keeper-ring in an asymmetric manner, each of said flattened portions then having a stamping bulge along the external periphery of said ring.
Claim 9
Dependent Claim
40 words
A diaphragm clutch as claimed in claim 1, in which said keeper-ring co-operates with said diaphragm through the intermediary of a curved surface, said flattened portions being formed on the surface of the ring axially opposite to said curved surface.
Claim 10
Dependent Claim
26 words
A keeper-ring for a diaphragm clutch as claimed in claim 1, in which said ring comprises at least one flat portion limited circumferentially by lateral flanks.
References Cited (Backward Citations)
GB1213918A
Cited
US3595355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |