Multi-tube shock absorber

Details Multi-tube shock absorber Multi-tube shock absorber

1990-06-22

1991-12-10

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

188318, 18832219, F16F 900

Patent

active

050709704

ABSTRACT:
A hydraulic damper for a suspension system comprises a fluid-filled inner cylinder mounting a reciprocating piston and piston rod. The piston divides the interior of the inner cylinder into upper and lower chambers. A reservoir tube surrounds the inner cylinder and forms a reservoir in the interior volume between the reservoir tube and the inner cylinder. A base valve assembly permits the return of fluid into the lower chamber from the reservoir. A pair of concentric tubes are mounted between the inner cylinder and the reservoir tube and provide a one-way laminar flow path for fluid exiting the upper chamber of the inner cylinder and entering the reservoir. The length and the spacing of the concentric tubes can be varied to provide a preselected damping force.

REFERENCES:
patent: 2025199 (1935-12-01), Funston
patent: 2048037 (1936-07-01), Smith
patent: 3078967 (1963-02-01), Brown et al.
patent: 3127958 (1964-04-01), Szostak
patent: 3966030 (1976-06-01), Sirven
patent: 4702356 (1987-10-01), Katz et al.
patent: 4828229 (1989-06-01), Fannin et al.

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