Hydraulic damper of adjustable damping force type

Details Hydraulic damper of adjustable damping force type Hydraulic damper of adjustable damping force type

1989-06-06

1991-03-05

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

188282, 188285, 188299, F16F 944

Patent

active

049970682

ABSTRACT:
A hydraulic damper for use in a vehicle capable of adjusting a damping force in accordance with road conditions. The hydraulic damper includes a cylinder chamber divided into two chambers by a piston, a bypass passage formed in the piston for communicating the two chambers, a plurality of damping force generation valves adaped to generate the damping forces in the extension side and the contraction side strokes, and a shutter for controlling the flow passage area of the bypass passage. Rotation of the shutter permits selective switching of the damping force generation valves to provide various kinds of damping force characteristics as suitable for the road condition.

REFERENCES:
patent: 4085667 (1978-04-01), Kurrat
patent: 4535877 (1985-08-01), Shimokura
patent: 4620619 (1986-11-01), Emura et al.
patent: 4723640 (1988-02-01), Beck
patent: 4754855 (1988-07-01), Kuwana et al.
patent: 4765446 (1988-08-01), Murata et al.
patent: 4826207 (1989-05-01), Yoshioka et al.

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