Patent US3303856A successfully refreshed from Google Patents.
US3303856A
Expired / Lapsed
US
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Controlled differential compression device
Assignee: Tayco Developments Inc
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Filing: 1963-09-16
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Granted: 1967-02-14
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Paul H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
F; F16; F16F; F16F5/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A COMPRESSIBLE LIQUID ACCUMULATOR COMPRISING A CASING, A TUBULAR PISTON RECIPROCABLY DISPOSED IN SAID CASING, A PISTON HEAD DISPOSED FOR RECIPROCATION IN SAID TUBULAR PISTON, SAID TUBULAR PISTON AND SAID PISTON HEAD BEING MOVABLE IN OPPOSITE DIRECTIONS, A MALE SEAL SECURED TO SAID PISTON HEAD AND SLIDABLY DISPOSED AGAINST THE INNER WALL OF SAID TUBULAR PISTON, A MALE SEAL SECURED TO SAID TUBULAR PISTON AND SLIDABLY ENGAGING THE INNER WALL OF SAID CASING TO PROVIDE AN EFFECTIVE PISTON DISPLACEMENT PER UNIT OF LINEAL MOVEMENT OF THE TUBULAR PISTON BETWEEN THE TWO MALE SEALS WHICH IS DIFFERENT FROM THE CORRESPOND-
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |