US3372919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vehicle leveling system
Assignee: Motors Liquidation Co
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Filing: 1966-07-29
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Granted: 1968-03-12
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Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 George W Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:15
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/43; B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
AN AUXILIARY SUSPENSION SYSTEM COMPRISING THE COMBINATION OF, A SHOCK ABSORBER HAVING A CYLINDER PORTION AND A PISTON ROD PORTION RECIPROCAL RELATIVE THERETO, FLUID SPRING MEANS FOR PRODUCING A PREDETERMINED HEIGHT RELATIONSHIP BETWEEN SAID CYLINDER PORTION AND SAID PISTON ROD PORTION, A PRESSURIZED ENCLOSURE HAVING COMPRESSOR MEANS THEREIN WITH AN OUTLET DISCHARGING INTERIORLY OF SAID ENCLOSURE, A FLUID RECEIVER FLUIDLY COMMUNICATED WITH THE INLET TO SAID COMPRESSOR MEANS, MEANS FOR DIRECTING PRESSURIZED FLUID FROM SAID PRESSURIZED ENCLOSURE INTERIOLY OF SAID FLUID SPRING MEANS, HEIGHT CONTROL MEANS INCLUDING VALVE MEANS FOR CONTROLLING FLOW OF FLUID FROM SAID FLUID SPRING MEANS BACK TO SAID FLUID RECEIVER, SAID PRESSURIZED ENCLOSURE, FLUID RECEIVER, FLUID SPRING AND FLUID DIRECTING MEANS HAVING A VOLUME INCLUDING A PREDETERMINED AMOUNT OF COMPRESSIBLE FLUID WHEREIN SAID SYSTEM IS MAINTAINED AT A PREDETERMINED PRESSURE WHEN SAID COMPRESSOR MEANS IS INOPERATIVE TO PREVENT COMPLETE DEFLATION OF SAID FLUID SPRING MEANS, SAID VOLUME AND SAID PREDETERMINED AMOUNT OF COMPRESSIBLE FLUID LIMITING THE PRESSURE BUILDUP IN SAID FLUID SPRING MEANS PRODUCED DURING OPERATION OF SAID COMPRESSOR MEANS.
Claim 2
Dependent Claim
174 words
AN AUXILIARY SUSPENSION SYSTEM COMPRISING THE COMBINATION OF, A SHOCK ABSORBER HAVING A CYLINDER PORTION AND A PISTON ROD PORTION RECIPROCAL RELATIVE THERETO, FLUID SPRING MEANS FOR PRODUCING A PREDETERMINED HEIGHT RELATIONSHIP BETWEEN SAID CYLINDER PORTION AND SAID PISTON ROD PORTION, A PRESSURIZED ENCLOSURE HAVING COMPRESSOR MEANS THEREIN WITH AN OUTLET DISCHARGING INTERIORLY OF SAID ENCLOSURE, A FLUID RECEIVER FLUIDLY COMMUNICATED WITH THE INLET TO SAID COMPRESSOR MEANS, MEANS FOR DIRECTING PRESSURIZED FLUID FROM SAID PRESSURIZED ENCLOSURE INTERIOLY OF SAID FLUID SPRING MEANS, HEIGHT CONTROL MEANS INCLUDING VALVE MEANS FOR CONTROLLING FLOW OF FLUID FROM SAID FLUID SPRING MEANS BACK TO SAID FLUID RECEIVER, SAID PRESSURIZED ENCLOSURE, FLUID RECEIVER, FLUID SPRING AND FLUID DIRECTING MEANS HAVING A VOLUME INCLUDING A PREDETERMINED AMOUNT OF COMPRESSIBLE FLUID WHEREIN SAID SYSTEM IS MAINTAINED AT A PREDETERMINED PRESSURE WHEN SAID COMPRESSOR MEANS IS INOPERATIVE TO PREVENT COMPLETE DEFLATION OF SAID FLUID SPRING MEANS, SAID VOLUME AND SAID PREDETERMINED AMOUNT OF COMPRESSIBLE FLUID LIMITING THE PRESSURE BUILDUP IN SAID FLUID SPRING MEANS PRODUCED DURING OPERATION OF SAID COMPRESSOR MEANS.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |