US3323623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable coupling device
Assignee: Eaton Corp
•
Filing: 1961-04-20
•
Granted: 1967-06-06
•
Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Daniel W Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:04
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/04; F01P7/042; F16; F16D; F16D35/00; F16D35/02; F16D35/029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A COUPLING OF THE VISCOUS SHEAR FLUID TYPE, A A PAIR OF COUPLING MEMBERS RELATIVELY ROTATABLE ON A COMMON AXIS, ONE OF SAID COUPLING MEMBERS COMPRISING HOUSING MEANS HAVING A WORKING CHAMBER AND THE OTHER OF SAID COUPLING MEMBERS BEING LOCATED IN SAID CHAMBER, SAID COUPLING MEMBERS HAVING SPACED OPPOSED SURFACE PORTIONS DEFINING A VISCOUS FLUID SHEAR CHAMBER THEREBETWEEN AND COOPERABLE WITH SHEAR FLUID IN SAID CHAMBER TO TRANSMIT TORQUE BETWEEN SAID MEMBERS, SAID VISCOUS SHEAR CHAMBER COMPRISING A RADIALLY EXTENDING CHAMBER OF A SUBSTANTIALLY FIXED VOLUME, SAID HOUSING MEANS HAVING AN INNER WALL EXTENDING ADJACENT SAID OTHER COUPLING MEMBER AND AN OUTER WALL AXIALLY SPACED FROM SAID INNER WALL, SAID INNER WALL HAVING AXIALLY EXTENDING OPENING MEANS COMMUNICATING WITH SAID WORKING CHAMBER, CYL-
Claim 2
Dependent Claim
125 words
IN A COUPLING OF THE VISCOUS SHEAR FLUID TYPE, A A PAIR OF COUPLING MEMBERS RELATIVELY ROTATABLE ON A COMMON AXIS, ONE OF SAID COUPLING MEMBERS COMPRISING HOUSING MEANS HAVING A WORKING CHAMBER AND THE OTHER OF SAID COUPLING MEMBERS BEING LOCATED IN SAID CHAMBER, SAID COUPLING MEMBERS HAVING SPACED OPPOSED SURFACE PORTIONS DEFINING A VISCOUS FLUID SHEAR CHAMBER THEREBETWEEN AND COOPERABLE WITH SHEAR FLUID IN SAID CHAMBER TO TRANSMIT TORQUE BETWEEN SAID MEMBERS, SAID VISCOUS SHEAR CHAMBER COMPRISING A RADIALLY EXTENDING CHAMBER OF A SUBSTANTIALLY FIXED VOLUME, SAID HOUSING MEANS HAVING AN INNER WALL EXTENDING ADJACENT SAID OTHER COUPLING MEMBER AND AN OUTER WALL AXIALLY SPACED FROM SAID INNER WALL, SAID INNER WALL HAVING AXIALLY EXTENDING OPENING MEANS COMMUNICATING WITH SAID WORKING CHAMBER, CYL-
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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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |