Shock absorber

Details Shock absorber Shock absorber

1992-03-25

1994-07-26

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

188317, F16F 950

Patent

active

053320697

ABSTRACT:
The invention provides a hydraulic shock absorber for controlling an attenuating force in a very low speed range and a medium or high speed range of the speed of a piston. A leaf valve for the high speed range and another leaf valve for the medium or high speed range are disposed for opening and closing movement at an exit end of a port formed in a partition wall member such as the piston. The leaf valve for the low speed range is supported at a rear face of an inner peripheral portion thereof for up and down floating movement on an upper face of a valve stopper. In the medium or high speed range, the leaf valve for the low speed range is deflected to move the inner peripheral portion thereof floatingly, which prevents the leaf valve from being deflected excessively and hence prevents a possible break of the leaf valve.

REFERENCES:
patent: 3837445 (1974-09-01), Pierle
patent: 4076276 (1978-02-01), Wijnhoven et al.
patent: 4203507 (1980-05-01), Tomita et al.
patent: 4485900 (1984-12-01), Kato et al.
patent: 4721130 (1988-01-01), Hayashi
patent: 4782925 (1988-11-01), Grandai
patent: 4819773 (1989-04-01), Ito et al.
patent: 4964493 (1990-10-01), Yamaura et al.
patent: 4972929 (1990-11-01), Ivers
patent: 5042624 (1991-08-01), Furuya et al.

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