Hydropneumatic jack

Details Hydropneumatic jack Hydropneumatic jack

1988-06-30

1989-08-22

Stormer, Russell D.

Wheel substitutes for land vehicles

Combined or convertible

305 31, 267 6413, 267 6426, B62D 5530

Patent

active

048590061

ABSTRACT:
The hydropneumatic jack comprises a tubular body (14) closed at one end and open at the other end. A hollow rod (9) is slidably mounted in the body (14) in a sealed manner and in the rod is formed a first chamber (18) containing a freely slidable piston (19) which divides the chamber into two compartments (18a, 18 b) which are sealed off from each other, a second chamber (23) being defined between a transverse end wall (21) constituting the end of the hollow rod (9) and the inner wall of the body (14). The transverse end wall (21) is provided with a nozzle (22) putting the second chamber (23) in communication with the neighbouring compartment (18b) of hollow rod (9). The compartment (18b) and the second chamber (23) are filled with a hydraulic liquid under pressure and the second compartment (18a) is filled with a pressurized gas. This jack automatically and instantaneously corrects the decreases in tension of the track (1) in the static state, subsequent to wear or expansion of the track and rollers.

REFERENCES:
patent: 2753036 (1956-07-01), Joy
patent: 3304076 (1967-02-01), Doversberger
patent: 3539229 (1970-11-01), Scully
patent: 3656632 (1972-04-01), Karakashian et al.
patent: 3853311 (1974-12-01), Kreuzer et al.
patent: 3944198 (1976-03-01), Sakamoto
patent: 4029306 (1977-06-01), Sakaguchi et al.
patent: 4381857 (1983-05-01), Cook
patent: 4470583 (1984-09-01), Peiffer et al.
patent: 4506869 (1985-03-01), Masclet et al.

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