Shock absorber with reservoir and working chamber communicating

Details Shock absorber with reservoir and working chamber communicating Shock absorber with reservoir and working chamber communicating

1977-09-06

1981-04-21

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

188269, 267 8R, F16F 906

Patent

active

042627796

ABSTRACT:
A shock absorber and suspension strut unit having an outer cylinder containing a predetermined amount of a damping liquid. An inner cylinder is mounted rigidly and concentrically in the outer cylinder and is arranged so as to form an intermediate concentric space between the cylinders. A movable piston rod assembly is movable relative to the double-cylinder assembly and has a piston slidably arranged within the inner cylinder for movement therealong. Check valves are provided in the piston for permitting selective fluid flow from one side of the piston to the other. Further, one or more communication passages are provided in an end of the inner cylinder which abuts the enclosed and the outer cylinder for allowing fluid passage therethrough mutually between a liquid chamber formed below the piston within the inner cylinder and lower part of the annular space formed by and between the cylinders. Thus, these spaces are a substantially unified liquid chamber. A first gas-filled chamber formed at the upper part of the further liquid chamber above the piston within the inner cylinder, while a second gas-filled chamber is formed at the upper part of the annular space. The resulting unit is characterized by the first and second gas-filled chambers being so arranged that either one of them is caused to expand during the contracting or expanding stroke of the unit, while the remaining one of the chambers is caused to simultaneously contract. A fluid flow-limiting passage is provided through the wall of the inner cylinder for allowing free fluid flow passage between the two gas-filled chambers.

REFERENCES:
patent: 1455265 (1923-05-01), Rabb
patent: 2974946 (1961-03-01), Tuczek
patent: 3661236 (1972-05-01), Wossner

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