Patent US3081075A successfully refreshed from Google Patents.
US3081075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid springs
Assignee: Dunlop Rubber Co Ltd
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Filing: 1960-02-05
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Granted: 1963-03-12
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Expires: 1980-02-05
Abstract
No abstract record available.
Inventors
- 👤 Selman Alan Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:24
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/0445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A FLUID SPRING COMPRISING TWO END MEMBERS DISPLACEABLE TOWARD EACH OTHER, ONE OF SAID END MEMBERS HAVING A LARGER PRESSURE AREA THAN THAT OF THE OTHER END MEMBER, AN ANNULAR RETAINING MEMBER BETWEEN SAID END MEMBERS OVERLAPPING THE PERIMETER OF THE PRESSURE AREA OF THE END MEMBER OF LESSER PRESSURE AREA AND HAVING AN ANNULAR SKIRT EXTENDING TOWARD THE END MEMBER OF LESSER PRESSURE AREA, AND A HOLLOW BODY OF RESILIENT, FLEXIBLE, MATERIAL EXTENDING BETWEEN AND SEALED FLUID-TIGHTLY TO SAID END MEMBERS AND BULGING OUTWARDLY OF THE END
Claim 2
Dependent Claim
88 words
A FLUID SPRING COMPRISING TWO END MEMBERS DISPLACEABLE TOWARD EACH OTHER, ONE OF SAID END MEMBERS HAVING A LARGER PRESSURE AREA THAN THAT OF THE OTHER END MEMBER, AN ANNULAR RETAINING MEMBER BETWEEN SAID END MEMBERS OVERLAPPING THE PERIMETER OF THE PRESSURE AREA OF THE END MEMBER OF LESSER PRESSURE AREA AND HAVING AN ANNULAR SKIRT EXTENDING TOWARD THE END MEMBER OF LESSER PRESSURE AREA, AND A HOLLOW BODY OF RESILIENT, FLEXIBLE, MATERIAL EXTENDING BETWEEN AND SEALED FLUID-TIGHTLY TO SAID END MEMBERS AND BULGING OUTWARDLY OF THE END
References Cited (Backward Citations)
DE446516C
Cited
US2537637A
Cited
US2773686A
Cited
FR1163065A
Cited
US2933308A
Cited
US2956797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |