Hydraulic damper

Details Hydraulic damper Hydraulic damper

1987-12-14

1989-05-30

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Relative speed of thrust member or fluid flow

188282, 18832214, 18832215, 18832222, F16F 949, F16F 934

Patent

active

048342220

ABSTRACT:
A hydraulic damper has a valve mechanism adapted to generate a damping force during extension and contraction strokes of the damper. The valve mechanism includes a disc valve assembly consisting of a main disc valve for generating a damping force and an orifice for generating a damping force in low operation speed region of the damper. The orifce is provided with an additional disc valve for controlling the damping force generated.

REFERENCES:
patent: 3991862 (1976-11-01), Tanabe
patent: 4034860 (1977-07-01), Leppich
patent: 4113072 (1978-09-01), Palmer
patent: 4114735 (1978-09-01), Kato
patent: 4191281 (1980-03-01), Nishikawa et al.
patent: 4203507 (1980-05-01), Tomita et al.
patent: 4512447 (1985-04-01), Miura
patent: 4561524 (1985-12-01), Mizumukai et al.
patent: 4610332 (1986-09-01), Mourray
patent: 4635765 (1987-01-01), Schmidt
patent: 4721130 (1988-01-01), Hayashi
Abstract, Japanese, 6--129442, published, Jul. 10, 1985, entitled "Valve Structure of Oil Damper", Tatsuya Takagi.

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