US4375253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection limiting stop for a diaphragm spring clutch
Assignee: Borg Warner Corp
•
Filing: 1980-09-24
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Granted: 1983-03-01
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Expires: 2000-09-24
Abstract
Abstract A deflection limiting stop for a diaphragm spring clutch which is positioned in the clutch cover to be engaged by the outer periphery of the diaphragm spring as it pivots from the engaged to the disengaged position of the clutch. The use of the stop prevents an overstressed condition for the spring, and thus improves the fatigue life thereof.
Inventors
- 👤 Philip J. Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:29
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/583; F16D13/585; F16D13/70; F16D13/71
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
In a vehicle clutch assembly including a flywheel, a clutch cover secured to the flywheel, a pressure plate operatively connected with said clutch cover and having a fulcrum surface formed adjacent its outer periphery, a clutch plate positioned between and adapted to be squeezed by the flywheel and pressure plate, and a diaphragm spring pivotally mounted intermediate its inner and outer edges in said clutch cover and engaging said fulcrum surface on said pressure plate radially outwardly of said clutch cover pivotal mounting, the outer edge of said spring having freedom of movement within said clutch cover, the improvement comprising at least one deflection limiting stop secured in said clutch cover to be engaged by said outer spring edge and limit pivotal movement of said diaphragm spring.
Claim 2
Dependent Claim
127 words
In a vehicle clutch assembly including a flywheel, a clutch cover secured to the flywheel, a pressure plate operatively connected with said clutch cover and having a fulcrum surface formed adjacent its outer periphery, a clutch plate positioned between and adapted to be squeezed by the flywheel and pressure plate, and a diaphragm spring pivotally mounted intermediate its inner and outer edges in said clutch cover and engaging said fulcrum surface on said pressure plate radially outwardly of said clutch cover pivotal mounting, the outer edge of said spring having freedom of movement within said clutch cover, the improvement comprising at least one deflection limiting stop secured in said clutch cover to be engaged by said outer spring edge and limit pivotal movement of said diaphragm spring.
Claim 3
Dependent Claim
35 words
A vehicle clutch assembly as set forth in claim 1, in which said limiting stop is located on the interior surface of said clutch cover so as to engage the periphery of said diaphragm spring.
Claim 4
Dependent Claim
22 words
A vehicle clutch assembly as set forth in claim 1, in which an annular limiting stop is secured to said clutch cover.
Claim 5
Dependent Claim
21 words
A vehicle clutch assembly as set forth in claim 2, in which said limiting stop is integral with said clutch cover.
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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |