US3599530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic replenisher for the hydro-pneumatic recoil systems of large caliber guns
Assignee: United States Department of the Army
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Filing: 1969-11-19
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Granted: 1971-08-17
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Expires: 1989-11-19
Abstract
Abstract In order to maintain a uniform starting point for the reciprocable piston in a hydropneumatic recuperator of the type utilized in the recoil systems of large caliber guns, a reservoir is jointly connected to each of the gas and oil chambers in the recuperator and is provided with a floating piston arranged to separate the oil and the gas into individual areas and maintain an equilibrium position therebetween arranged to return the recuperator piston against a fixed stop at the end of each firing cycle regardless of any change in the volume of the oil.
Inventors
- 👤 Robert E Seamands
- 👤 Elmer J Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:27
CPC Classifications
F; F41; F41A; F41A25/00; F41A25/16; F41A25/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
In a large caliber gun having a hydropneumatic recoil mechanism including a recuperator unit with a reciprocating piston responsive to the recoil flow of oil thereagainst for compressing a quantity of nitrogen gas to provide the motive power for returning the recoiling parts of the gun to battery position, means for returning the recuperator piston to the same starting position at the end of each firing cycle comprising, a replenisher connected to each end of the recuperator, and a piston slidably seated in said replenisher between the oil and the gas therein to maintain an equilibrium position responsive to changes in the quantity of oil within the entire recoil mechanism.
Claim 2
Dependent Claim
110 words
In a large caliber gun having a hydropneumatic recoil mechanism including a recuperator unit with a reciprocating piston responsive to the recoil flow of oil thereagainst for compressing a quantity of nitrogen gas to provide the motive power for returning the recoiling parts of the gun to battery position, means for returning the recuperator piston to the same starting position at the end of each firing cycle comprising, a replenisher connected to each end of the recuperator, and a piston slidably seated in said replenisher between the oil and the gas therein to maintain an equilibrium position responsive to changes in the quantity of oil within the entire recoil mechanism.
Claim 3
Dependent Claim
31 words
The invention defined in claim 1 wherein said replenisher piston is contoured to produce a differential pressure thereon responsive to changes in the volume of the oil in the recoil mechanism.
Claim 4
Dependent Claim
69 words
The invention defined in claim 1 wherein said replenisher piston comprises a head and a rod extending from one side of said head through the nitrogen gas to project outwardly of said replenisher whereby the area exposed to the oil is larger than the area exposed to the gas to provide a differential pressure thereagainst for normally urging said piston to compensate for changes in the volume of oil.
Claim 5
Dependent Claim
64 words
The invention defined in claim 1 wherein the connection between the recuperator and said replenisher includes a restricted passage for preventing the flow of oil therebetween during the reciprocation of the recoiling parts without affecting the required equalization of the pressure between the oil in the recuperator and the oil in said replenisher following the termination of the counterrecoil movement of the recoiling parts.
References Cited (Backward Citations)
US3410174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |