Shock absorber

Details Shock absorber Shock absorber

1994-03-31

1995-05-09

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

18832215, F16F 9348

Patent

active

054131952

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), Fierle
patent: 4076276 (1978-02-01), Wijnhoven et al.
patent: 4088207 (1978-05-01), Kato
patent: 4782925 (1988-11-01), Grundei
patent: 4964493 (1990-10-01), Yamaura et al.
patent: 5042624 (1991-08-01), Furuya et al.

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