Variable damping force hydraulic shock absorber

Details Variable damping force hydraulic shock absorber Variable damping force hydraulic shock absorber

1994-09-16

1996-06-04

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188319, F16F 946

Patent

active

055224849

ABSTRACT:
A variable damping force hydraulic shock absorber has a solenoid driven control valve that controls the size of an opening to a control passage contained within the piston rod. The control passage allows fluid contained within the cylinder to bypass the resistance mechanism of the piston. The size of the opening to the control passage varies according to the movement of a control element within the hollow piston rod. The movement of the control element is controlled by the magnitude of the electrical current delivered to a solenoid driven control valve. The movement of the control element is aided by a compression spring located between the control element and an adjusting bolt. The damping force of the shock absorber is externally adjustable by turning the adjusting bolt located within one end of the piston rod.

REFERENCES:
patent: 2349244 (1944-05-01), Brown
patent: 2931035 (1960-03-01), Reinhard
patent: 3158232 (1964-11-01), Doetsch
patent: 4954799 (1990-09-01), Kumar
patent: 4986392 (1991-01-01), Komossa

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