Patent US3259221A successfully refreshed from Google Patents.
US3259221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscous coupling
Assignee: Eaton Corp
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Filing: 1964-03-02
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Granted: 1966-07-05
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Ward L Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:29
CPC Classifications
F; F16; F16D; F16D35/00; F16D35/02; F16D35/021; F16D35/023; F01; F01P; F01P7/00; F01P7/02; F01P7/04; F01P7/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A FLUID COUPLING OF THE SHEAR TYPE COMPRISING A FIRST COUPLING MEMBER DEFINING A FLUID WORKING CHAMBER, A SECOND COUPLING MEMBER ROTATABLE IN THE FLUID WORKING CHAMBER, SAID SECOND COUPLING MEMBER HAVING FLUID WORKING ING CHAMBER PORTIONS ON THE OPPOSITE AXIAL SIDES THEREOF, ONE OF SAID WORKING CHAMBER PORTIONS BEING DEFINED BY OPPOSED SPACED SURFACES ON SAID FIRST AND SECOND COUPLING MEMBERS AND PROVIDING A FLUID SHEAR SPACE THEREBETWEEN, SAID OPPOSED SPACED SURFACES BEING COOPERABLE WITH THE FLUID SHEAR MEDIUM IN THE SHEAR SPACE TO TRANSMIT TORQUE BETWEEN THE COUPLING MEMBERS AND MEANS DEFINING A PLURALITY OF NOTCHES IN THE OUTER PERIPHERY OF THE SECOND COUPLING MEMBER AND EACH OF WHICH HAVE A LENGTH AND WIDTH WITH THE LENGTH BEING SUBSTANTIALLY LESS THAN THE CIRCUMFERENCE OF THE SECOND COUPLING MEMBER AND WHICH INTERSECT ONE AXIAL SIDE ONLY OF SAID SECOND COUPLING MEMBER AND TERMINATE AT THEIR INTERSECTION WITH SAID ONE AXIAL SIDE.
Claim 2
Dependent Claim
152 words
A FLUID COUPLING OF THE SHEAR TYPE COMPRISING A FIRST COUPLING MEMBER DEFINING A FLUID WORKING CHAMBER, A SECOND COUPLING MEMBER ROTATABLE IN THE FLUID WORKING CHAMBER, SAID SECOND COUPLING MEMBER HAVING FLUID WORKING ING CHAMBER PORTIONS ON THE OPPOSITE AXIAL SIDES THEREOF, ONE OF SAID WORKING CHAMBER PORTIONS BEING DEFINED BY OPPOSED SPACED SURFACES ON SAID FIRST AND SECOND COUPLING MEMBERS AND PROVIDING A FLUID SHEAR SPACE THEREBETWEEN, SAID OPPOSED SPACED SURFACES BEING COOPERABLE WITH THE FLUID SHEAR MEDIUM IN THE SHEAR SPACE TO TRANSMIT TORQUE BETWEEN THE COUPLING MEMBERS AND MEANS DEFINING A PLURALITY OF NOTCHES IN THE OUTER PERIPHERY OF THE SECOND COUPLING MEMBER AND EACH OF WHICH HAVE A LENGTH AND WIDTH WITH THE LENGTH BEING SUBSTANTIALLY LESS THAN THE CIRCUMFERENCE OF THE SECOND COUPLING MEMBER AND WHICH INTERSECT ONE AXIAL SIDE ONLY OF SAID SECOND COUPLING MEMBER AND TERMINATE AT THEIR INTERSECTION WITH SAID ONE AXIAL SIDE.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |