Hydraulic damper

Details Hydraulic damper Hydraulic damper

1982-01-27

1983-10-25

Spar, Robert J.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

18832217, 267126, F16F 936

Patent

active

044113420

ABSTRACT:
A hydraulic damper includes a dual-tube type housing consisting of inner and outer tubes, a piston slidably disposed in the inner tube and dividing the interior thereof into two oil chambers, a piston rod secured to the piston and extending to the outside of the housing, a reservoir chamber defined between the inner and outer tubes and containing therein oil and gas, a passage connecting one of the oil chambers through which the piston rod extends with the gas containing portion of the reservoir chamber, and a valve member formed of a resilient material and having a lip portion acting as one-way valve for allowing fluid flow in the passage only in the direction from the one oil chamber to the reservoir chamber. A substantial portion of the radially inner surface of the lip portion is supported by a rigid annular retaining member.

REFERENCES:
patent: 3203511 (1965-08-01), Long
patent: 4005769 (1977-02-01), Itoh
patent: 4108287 (1978-08-01), Kato
patent: 4185721 (1980-01-01), Karklins et al.
patent: 4189033 (1980-02-01), Katsumori
patent: 4245825 (1981-01-01), Ohtomo et al.
patent: 4274517 (1981-06-01), Kato et al.

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