Patent US3128089A successfully refreshed from Google Patents.
US3128089A
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Suspension and height control system for vehicles
Assignee: Caterpillar Inc
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Filing: 1961-08-25
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Granted: 1964-04-07
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Expires: 1981-08-25
Abstract
No abstract record available.
Inventors
- 👤 Richard A Burris
- 👤 Robert E Gerber
- 👤 Jr Charles C Sons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:38
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/048; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
IN A VEHICLE SUSPENSION SYSTEM, A VERTICALLY DISPOSED HOLLOW STRUT FIXED RELATIVE TO A VEHICLE WHEEL, A CYLINDER FIXED TO THE VEHICLE BODY AND TELESCOPING DOWNWARDLY OVER SAID STRUT TO PROVIDE THEREWITH A LIQUID CHAMBER OF VARIABLE CAPACITY, A CYLINDRICAL GAS CHAMBER EXTENDING DOWNWARDLY FROM THE UPPER END OF SAID CYLINDER INTO SAID STRUT AND HAVING AN OPEN LOWER END, AND A FLOATING PISTON THEREIN TO CONFINE GAS TO ITS UPPER PORTION WHEREBY WEIGHT IMPOSED ON SAID CYLINDER WILL CAUSE SAID FLOATING PISTON TO MOVE UPWARDLY AGAINST THE PRESSURE OF GAS IN THE GAS CHAMBER, AND MEANS OPERABLE UPON RAISING AND LOWERING OF THE CYLINDER RELATIVE TO THE STRUT TO DECREASE AND INCREASE RESPECTIVELY THE VOLUME OF LIQUID IN SAID LIQUID CHAMBER TO MAINTAIN THE CYLINDER AND SUSPENDED VEHICLE AT A CONSTANT ELEVATION RELATIVE TO THE GROUND,
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |