US3123349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic leveling device with integrated automatic control
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:12
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/027; B60G17/0272; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN COMBINATION, A SPRUNG MASS, AN UNSPRUNG MASS, A FIXED SPRING SEAT ON THE UNSPRUNG MASS, A FLUID OPERATED EXTENSIBLE SPRING SEAT ON THE SPRUNG MASS, A COIL SPRING DISPOSED BETWEEN SAID SEATS, AND REACTION OPERATED CONTROL MEANS DISPOSED ENTIRELY BETWEEN SAID EXTENSIBLE SPRING SEAT AND SAID SPRUNG MASS RESPONDING DIRECTLY TO LOAD INCREASE ON SAID SPRUNG MASS TO CONTROL FLOW OF FLUID INTO AND OUT OF SAID EXTENSIBLE SPRING SEAT SO THAT THE DISPLACED RELATION THEREOF EQUALS THE AMOUNT OF COIL SPRING COMPRESSION RESULTING FROM INCREASED LOAD.
Claim 2
Dependent Claim
88 words
IN COMBINATION, A SPRUNG MASS, AN UNSPRUNG MASS, A FIXED SPRING SEAT ON THE UNSPRUNG MASS, A FLUID OPERATED EXTENSIBLE SPRING SEAT ON THE SPRUNG MASS, A COIL SPRING DISPOSED BETWEEN SAID SEATS, AND REACTION OPERATED CONTROL MEANS DISPOSED ENTIRELY BETWEEN SAID EXTENSIBLE SPRING SEAT AND SAID SPRUNG MASS RESPONDING DIRECTLY TO LOAD INCREASE ON SAID SPRUNG MASS TO CONTROL FLOW OF FLUID INTO AND OUT OF SAID EXTENSIBLE SPRING SEAT SO THAT THE DISPLACED RELATION THEREOF EQUALS THE AMOUNT OF COIL SPRING COMPRESSION RESULTING FROM INCREASED LOAD.
References Cited (Backward Citations)
US2687311A
Cited
US2977134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |