Hydraulic shock absorber with adjustable damping force

Details Hydraulic shock absorber with adjustable damping force Hydraulic shock absorber with adjustable damping force

1986-08-07

1988-05-03

Dorner, Kenneth J.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188285, 25112906, 25112911, F16K 3102, F16F 946

Patent

active

047414162

ABSTRACT:
A hydraulic shock absorber of the adjustable damping force type includes a piston rod which is projected out of a cylinder and provided with a damping factor adjusting actuator includes a casing. The actuator accommodating a rotor for rotation with an adjusting rod, an ultrasonic vibratory element and a vibration transmitting member. A high frequency voltage is applied to the ultrasonic vibratory element from outside to generate surface waves of a high frequency on the surface of the vibration transmitting member to rotationally drive the rotor. The rotor thus rotates the adjusting rod to adjust the damping force of the hydraulic shock absorber.

REFERENCES:
patent: 3465732 (1969-09-01), Kattches
patent: 4577832 (1986-03-01), Sogabe
patent: 4647006 (1987-03-01), Glynn et al.

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