US4114742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction clutch cover assemblies
Assignee: Whitnash PLC
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Filing: 1977-02-15
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Granted: 1978-09-19
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Expires: 1997-02-15
Abstract
Abstract A clutch cover assembly for a diaphragm spring friction clutch has a generally annular clutch cover with a plurality of circumferentially arranged holes in the cover, a diaphragm spring attached to the clutch cover and having an annular portion and a plurality of inwardly projecting spring fingers integral therewith, and a pressure plate secured to the cover so that the diaphragm spring is interposed between the cover and the pressure plate. The diaphragm spring is attached to the clutch cover by a plurality of individual wire members each of which passes through two of the plurality of circumferentially arranged holes in the cover and encompasses one finger of the diaphragm spring and a portion of the cover.
Inventors
- 👤 Dennis George Rawlings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:53
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/583; F16D13/585
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
A clutch cover assembly comprising a clutch cover of a generally annular configuration; a plurality of holes circumferentially arranged in the cover; a diaphragm spring attached to the cover and having an annular frusto-conical portion and a plurality of inwardly spaced projecting spring fingers integral therewith; a pressure plate secured to the cover so that the diaphragm spring is interposed between the pressure plate and the cover; a pluraity of individual wire members each of which consists of a length of wire formed into a substantially closed rectangular ring and passes through adjacent holes in the cover so as to tightly embrace and axially clamp together one finger of the diaphragm spring and a portion of the cover between said adjacent holes and a portion of said ring lies against the side of the finger away from the cover so as to provide a fulcrum for the movement of the finger relative to the cover.
Claim 2
Dependent Claim
155 words
A clutch cover assembly comprising a clutch cover of a generally annular configuration; a plurality of holes circumferentially arranged in the cover; a diaphragm spring attached to the cover and having an annular frusto-conical portion and a plurality of inwardly spaced projecting spring fingers integral therewith; a pressure plate secured to the cover so that the diaphragm spring is interposed between the pressure plate and the cover; a pluraity of individual wire members each of which consists of a length of wire formed into a substantially closed rectangular ring and passes through adjacent holes in the cover so as to tightly embrace and axially clamp together one finger of the diaphragm spring and a portion of the cover between said adjacent holes and a portion of said ring lies against the side of the finger away from the cover so as to provide a fulcrum for the movement of the finger relative to the cover.
Claim 3
Dependent Claim
20 words
A clutch cover assembly according to claim 1 wherein an individual wire member encompasses each finger of the diaphragm spring.
Claim 4
Dependent Claim
29 words
A clutch cover assembly according to claim 2 wherein the plurality of circumferentially arranged holes are arranged so that the holes are aligned with spaces between the spring fingers.
Claim 5
Dependent Claim
91 words
A clutch cover assembly according to claim 1 including an annular groove in one side of the cover away from the diaphragm spring and a complementary annular rib on the second side of the cover adjacent the diaphragm spring, wherein the plurality of circumferentially arranged holes are located in the annular groove in said one side of the cover and the annular groove runs around the inner perimeter of the cover and the complementary annular rib on the second side of the cover acts as a pivot for the diaphragm spring.
Claim 6
Dependent Claim
37 words
A clutch cover assembly according to claim 4 wherein the substantially closed rectangular rings are arranged so that the incomplete side of the ring is located in the annular groove on said one side of the cover.
Claim 7
Dependent Claim
89 words
A clutch cover assembly according to claim 5 wherein the diaphragm spring is also provided with an annular rib on the side of the spring adjacent the cover which has a complementary groove on the side of the spring away from the cover and the annular rib on the spring is aligned with the annular rib on the second side of the cover, and the rectangular wire rings are located in the angular groove on said one side of the cover and the aligning groove on the diaphragm spring.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |