Liquid-gas constant force recoil spring

Details Liquid-gas constant force recoil spring Liquid-gas constant force recoil spring

1975-06-06

1978-08-22

Cherry, Johnny D.

Ordnance

Mounts

With recoil check

188269, 188298, 267 64A, 267121, F16F 500, F16F 908

Patent

active

041080467

ABSTRACT:
A constant-force spring of the liquid-gas type comprising a piston slidable n a cylinder and an elastomeric bladder enclosed in the cylinder. The bladder is filled with a gas, preferably nitrogen. The rest of the cylinder is filled with a compressible liquid having a low bulk modulus. A liquid that can be used is dimethyl silicone which has a bulk modulus of only 150,000 psi. The low bulk modulus gives a low spring constant which is necessary if a constant force characteristic is to be achieved.

REFERENCES:
patent: 2392387 (1946-01-01), Joy
patent: 2560005 (1951-07-01), Shawbrook et al.
patent: 2914089 (1959-11-01), Allinquant
patent: 2973694 (1961-03-01), Herlach et al.
patent: 3034803 (1962-05-01), Doulgheridis
patent: 3304077 (1967-02-01), Eaton et al.
patent: 3484092 (1969-12-01), Scarpatetti

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