US3177852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drives suitable for operating fans of automotive vehicles
Assignee: Dowty Hydraulic Units Ltd
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Filing: 1963-08-08
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Granted: 1965-04-13
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Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur E H Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:43
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/25; F01; F01P; F01P7/00; F01P7/02; F01P7/08; F01P7/081; F01P7/082; F01P7/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN COMBINATION, ROTATABLE DRIVEN AND DRIVING MEMBERS FORMING A CLUTCH, ROTATABLE DRIVE MEANS OPERATING TO ROTATE THE DRIVING MEMBER, FIRST AND SECOND CAMS ROTATABLY MOUNTED ON THE DRIVE MEANS AND THE DRIVING MEMBER, RESPECTIVELY, AND HAVING CAM SURFACES THEREON WHICH ROTATE IN OVERLAPPING PATHS, RESILIENT MEANS URGING THE SECONE CAM TO ROTATE ITS CAM SURFACE INTO CONTACT WITH THE CAM SURFACE ON THE FIRST CAM, A CLUTCH ACTUATOR, MEANS RESPONSIVE TO THE OPERATION OF THE CLUTCH ACTUATOR TO ROTATE THE FIRST CAM IN THE DIRECTION OF BIAS ON THE SECOND CAM, WITH THE CONSEQUENT EFFECT OF ROTATING THE SECOND CAM IN THE DIRECTION OPPOSING SUCH BIAS, AND MEANS OPERABLE TO ENGAGE THE DRIVING MEMBER WITH THE DRIVEN MEMBER IN RESPONSE TO ROTATION OF THE SECOND CAM IN THE DIRECTION OF BIAS AFTER THE CRESTS OF THE CAM SURFACES TOGGLE OVER ONE ANOTHER.
Claim 2
Dependent Claim
142 words
IN COMBINATION, ROTATABLE DRIVEN AND DRIVING MEMBERS FORMING A CLUTCH, ROTATABLE DRIVE MEANS OPERATING TO ROTATE THE DRIVING MEMBER, FIRST AND SECOND CAMS ROTATABLY MOUNTED ON THE DRIVE MEANS AND THE DRIVING MEMBER, RESPECTIVELY, AND HAVING CAM SURFACES THEREON WHICH ROTATE IN OVERLAPPING PATHS, RESILIENT MEANS URGING THE SECONE CAM TO ROTATE ITS CAM SURFACE INTO CONTACT WITH THE CAM SURFACE ON THE FIRST CAM, A CLUTCH ACTUATOR, MEANS RESPONSIVE TO THE OPERATION OF THE CLUTCH ACTUATOR TO ROTATE THE FIRST CAM IN THE DIRECTION OF BIAS ON THE SECOND CAM, WITH THE CONSEQUENT EFFECT OF ROTATING THE SECOND CAM IN THE DIRECTION OPPOSING SUCH BIAS, AND MEANS OPERABLE TO ENGAGE THE DRIVING MEMBER WITH THE DRIVEN MEMBER IN RESPONSE TO ROTATION OF THE SECOND CAM IN THE DIRECTION OF BIAS AFTER THE CRESTS OF THE CAM SURFACES TOGGLE OVER ONE ANOTHER.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |