Patent US3331599A successfully refreshed from Google Patents.
US3331599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle leveling system
Assignee: Motors Liquidation Co
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Filing: 1965-03-30
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Granted: 1967-07-18
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Expires: 1985-03-30
Abstract
No abstract record available.
Inventors
- 👤 Von D Polhemus
- 👤 Peter B Loomis
- 👤 Gerard T Klees
- 👤 Robert W Plume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:34
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/044; Y; Y10; Y10S; Y10S267/00; Y10S267/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A SELF-ADJUSTING EXTENSIBLE SPRING SEAT COMPRISING, A FIXED TUBULAR MEMBER, A MOVABLE TUBULAR MEMBER TELESCOPINGLY EMBRACING SAID FIXED MEMBER, A FLUID INTAKE PASSAGE AND A FLUID EXHAUST PASSAGE FORMED IN SAID FIXED MEMBER, A VARIABLE VOLUME PRESSURIZABLE CAVITY FORMED BETWEEN SAID MEMBERS, A VALVE ASSEMBLY WITHIN SAID CAVITY INCLUDING A VALVING ELEMENT FOR CONTROLLING FLOW OF FLUID FROM SAID CAVITY THROUGH SAID EXHAUST PASSAGE, SAID VALVE ASSEMBLY FURTHER INCLUDING DIAPHRAGM MEANS DIRECTLY RESPONSIVE TO THE PRESSURE IN SAID CAVITY TO BIAS SAID VALVING ELEMENT TO A CLOSED POSITION AND OPPOSING SPRING MEANS FOR SELECTIVELY OPENING SAID VALVING ELEMENT AGAINST SAID CAVITY PRESSURE FOR DISCHARGING FLUID FROM SAID CAVITY THROUGH SAID EXHAUST PASSAGE.
Claim 2
Dependent Claim
112 words
A SELF-ADJUSTING EXTENSIBLE SPRING SEAT COMPRISING, A FIXED TUBULAR MEMBER, A MOVABLE TUBULAR MEMBER TELESCOPINGLY EMBRACING SAID FIXED MEMBER, A FLUID INTAKE PASSAGE AND A FLUID EXHAUST PASSAGE FORMED IN SAID FIXED MEMBER, A VARIABLE VOLUME PRESSURIZABLE CAVITY FORMED BETWEEN SAID MEMBERS, A VALVE ASSEMBLY WITHIN SAID CAVITY INCLUDING A VALVING ELEMENT FOR CONTROLLING FLOW OF FLUID FROM SAID CAVITY THROUGH SAID EXHAUST PASSAGE, SAID VALVE ASSEMBLY FURTHER INCLUDING DIAPHRAGM MEANS DIRECTLY RESPONSIVE TO THE PRESSURE IN SAID CAVITY TO BIAS SAID VALVING ELEMENT TO A CLOSED POSITION AND OPPOSING SPRING MEANS FOR SELECTIVELY OPENING SAID VALVING ELEMENT AGAINST SAID CAVITY PRESSURE FOR DISCHARGING FLUID FROM SAID CAVITY THROUGH SAID EXHAUST PASSAGE.
References Cited (Backward Citations)
US2592391A
Cited
US3179401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |