Patent US3367235A successfully refreshed from Google Patents.
US3367235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breaking liquid spring support with dormant lockout
Assignee: United States Department of the Navy
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Filing: 1966-05-13
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Granted: 1968-02-06
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Expires: 1986-05-13
Abstract
No abstract record available.
Inventors
- 👤 Zenas B Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:40
CPC Classifications
F; F42; F42B; F42B39/00; F42B39/24; F41; F41F; F41F3/00; F41F3/04; F41F3/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A DOUBLE ACTING SPRING COMPRISING AN OUTER CYLINDER HAVING A BORE; FIRST ATTACHING MEANS ON ONE END OF SAID CYLINDER FOR CONNECTION TO A LOAD TO BE SPRING ACTION CONTROLLED; A ROD SLIDEABLY RETAINED WITHIN SAID CYLINDER BORE; SECOND ATTACHING MEANS ON ONE END OF THE SAID ROD REMOTE FROM SAID FIRST ATTACHING MEANS; PISTON MEANS COMPRISING FIRST AND SECOND PISTONS EACH HAVING HEADS AND INTEGRAL PISTON SLEEVES SLIDEABLY RETAINED WITHIN SAID CYLINDER BORE, TELESCOPICALLY DISPOSED ABOUT SAID ROD AND DEFINING WITH SAID CYLINDER AND SAID ROD A CHAMBER COMPLETELY FILLED WITH FLUID; EACH PISTON HEAD HAVING AT LEAST ONE DAMPING ORIFICE THERETHROUGH; SAID CYLINDER HAVING AN OUTER FLUID CHAMBER SEPARATED FROM SAID CHAMBER BY SAID PISTON MEANS; AND HIGH PRESSURE SEALS DISPOSED ON EITHER SIDE OF SAID PISTON SLEEVES, SAID PISTON MEANS BEING ENGAGEABLE WITH SAID ROD SUCH THAT APPLICATION OF INCREASED TENSION AND COMPRESSION FORCES WILL CAUSE MOVEMENT OF SAID PISTON MEANS INTO SAID INNER CHAMBER THEREBY DISPLACING FLUID FROM SAID INNER CHAMBER TO SAID OUTER CHAMBER THROUGH SAID ORIFICES WHEREBY A DAMPING EFFECT IS
Claim 2
Dependent Claim
177 words
A DOUBLE ACTING SPRING COMPRISING AN OUTER CYLINDER HAVING A BORE; FIRST ATTACHING MEANS ON ONE END OF SAID CYLINDER FOR CONNECTION TO A LOAD TO BE SPRING ACTION CONTROLLED; A ROD SLIDEABLY RETAINED WITHIN SAID CYLINDER BORE; SECOND ATTACHING MEANS ON ONE END OF THE SAID ROD REMOTE FROM SAID FIRST ATTACHING MEANS; PISTON MEANS COMPRISING FIRST AND SECOND PISTONS EACH HAVING HEADS AND INTEGRAL PISTON SLEEVES SLIDEABLY RETAINED WITHIN SAID CYLINDER BORE, TELESCOPICALLY DISPOSED ABOUT SAID ROD AND DEFINING WITH SAID CYLINDER AND SAID ROD A CHAMBER COMPLETELY FILLED WITH FLUID; EACH PISTON HEAD HAVING AT LEAST ONE DAMPING ORIFICE THERETHROUGH; SAID CYLINDER HAVING AN OUTER FLUID CHAMBER SEPARATED FROM SAID CHAMBER BY SAID PISTON MEANS; AND HIGH PRESSURE SEALS DISPOSED ON EITHER SIDE OF SAID PISTON SLEEVES, SAID PISTON MEANS BEING ENGAGEABLE WITH SAID ROD SUCH THAT APPLICATION OF INCREASED TENSION AND COMPRESSION FORCES WILL CAUSE MOVEMENT OF SAID PISTON MEANS INTO SAID INNER CHAMBER THEREBY DISPLACING FLUID FROM SAID INNER CHAMBER TO SAID OUTER CHAMBER THROUGH SAID ORIFICES WHEREBY A DAMPING EFFECT IS
References Cited (Backward Citations)
US2985443A
Cited
US3221602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |