US3203525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction clutch
Assignee: ZF Friedrichshafen AG
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Filing: 1963-03-04
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Granted: 1965-08-31
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Herbst Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:06
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/04; F16D13/22; F16D13/24; F16D13/26; F16D13/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
157 words
IN A CLUTCH OF THE CLASS DESCRIBED, A ROTATIVE SHAFT, A CLUTCH CARRIER MOUNTED ON SAID SHAFT AND ROTATIVE THEREWITH, A DRIVEN ELEMENT TO BE COUPLED TO SAID SHAFT FOR TORQUE TRANSMISSION, A FRICTION RING CARRIED ON SAID SHAFT AND A RADIAL CAM THERION AND ROTATIVE THEREWITH AND DISPOSED TO EXERT AXIAL THRUST ON SAID FRICTION RING, SAID FRICTION RING BEING AXIALLY SHIFTABLE FOR DRIVE ENGAGEMENT WITH SAID DRIVEN ELEMENT, AND A CAM ELEMENT, ROTATIVE WITH SAID CARRIER HAVING A CAMMING COATING WITH SAID RADIAL CAM, SAID FRICTION RING BEING SUPPORTED SOAS TO HAVE A PREDETEMINED TERMINED DEGREE OF ROTATION RELATIVE TO SAID CAM ELEMENT TO EFFECT AN AXIAL FORCE COMPONENT ON SAID FRICTION RING THROUGH SAID RADIAL CAM, SAID RADIAL CAM COMPRISING A RADIAL EDGE OF SAID FRICTION RING, SAID FRICTION RING HAVING A CONICAL INTERNAL FRICTION SURFACE TERMINATING AT ONE FACE OF SAID FRICTION RING, AND AT AN OPPOSITE FACE TERMINATING AT SAID RADIAL EDGE.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |