Patent US3171522A successfully refreshed from Google Patents.
US3171522A
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Plate clutch
Assignee: Rolls Royce PLC
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Filing: 1961-12-01
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Granted: 1965-03-02
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Expires: 1981-12-01
Abstract
No abstract record available.
Inventors
- 👤 Petrie James Alexander
- 👤 Bracey Kenneth Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:57
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/22; F16D13/38; F16D13/52; F16D13/58; F16D13/60; F16D13/64; F16D13/69; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
A PLATE CLUTCH COMPRISING A DRIVING MEMBER AND A DRIVEN MEMBER BOTH ROTATABLE ABOUT A COMMON AXIS, AT LEAST TWO CLUTCH PLATES CARRIED BY ONE OF SAID MEMBERS, AT LEAST ONE CLUTCH PLATE CARRIED BY THE OTHER OF SAID MEMBERS AND DISPOSED BETWEEN SAID TWO CLUTCH PLATES FOR ENGAGEMENT THEREWITH, AN ANNULAR UNDULATED SPRING PLATE DISPOSED BETWEEN SAID TWO CLUTCH PLATES, ENGAGEMENT MEANS CARRIED BY SAID TWO CLUTCH PLATES AND ENGAGING SAID SPRING PLATE SUCH THAT MOVEMENT OF SAID TWO CLUTCH PLATES TOWARDS ONE ANOTHER FORCES THE SPRING PLATE INTO AN INCREASINGLY UNDULATING FORM, SAID SPRING PLATE URGING SAID TWO CLUTCH PLATES APART, AND BEING ADAPTED TO MOVE SAID TWO CLUTCH PLATES OUT OF ENGAGEMENT WITH SAID ONE CLUTCH PLATE, AND MEANS SELECTIVELY OPERABLE TO OVERCOME THE FORCE OF SAID SPRING PLATE AND URGE SAID TWO CLUTCH PLATES INTO ENGAGEMENT WITH SAID ONE CLUTCH PLATE.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |