US3376739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic load limiter
Assignee: RTX Corp
•
Filing: 1965-10-12
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Granted: 1968-04-09
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 Marshall B Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:27
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/54; B66D1/58; B66C; B66C23/00; B66C23/88; B66C23/90; B66D3/00; B66D2700/00; B66D2700/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
IN A LOAD LIMITER FOR A CABLE HOIST, A CYLINDER AND PISTON ADAPTED TO BE CONNECTED IN SERIES IN THE CABLE BETWEEN THE HOIST MECHANISM AND AN OBJECT TO BE LIFTED, MEANS FOR VENTING SAID CYLINDER AT ITS END ADJACENT THE HOIST, AN ACCUMULATOR MOUNTED ON SAID CYLINDER INCLUDING A CLOSED CHAMBER HAVING FLUID COMMUNICATION WITH SAID CYLINDER ADJACENT THE OTHER END OF SAID CYLINDER, MEANS FOR CHARGING SAID CHAMBER WITH A HYDRAULIC FLUID, A FLEXIBLE BAG IN SAID CHAMBER, MEANS FOR CHARGING SAID BAG WITH AN EXPANSIBLE GAS TO PROVIDE AN INITIAL NO-DEFLECTION LOAD ON THE HYDRAULIC FLUID ACTING ON SAID PISTON, MEANS FOR GIVING AS VISUAL INDICATION OF THE PRESSURE ACTING ON SAID HYDRAULIC FLUID INCLUDING A PRESSURE GAGE, AND MEANS FOR GIVING AN AUDIBLE WARNING AS THE PISTON MOVES RELATIVE TO SAID CYLINDER.
References Cited (Backward Citations)
US2641926A
Cited
US3017939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |