Brakes – Internal-resistance motion retarder – Resistance alters relative to direction of thrust member
Patent
1993-04-08
1994-05-31
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Resistance alters relative to direction of thrust member
188320, 18832215, F16F 9348
Patent
active
053161130
ABSTRACT:
A hydraulic shock absorber includes a hollow cylinder which defines therein a fluid chamber filled with a working fluid, and a piston which is reciprocally disposed within the fluid chamber and divides the fluid chamber into upper and lower chambers. The piston is formed with fluid passages for establishing fluid communication between the upper and lower chambers. Each of the fluid passages is controlled by a disk valve assembly comprising a plurality of elastic disk plates, so as to introduce the working fluid from one of the upper and lower chambers to the other chamber when fluid pressure in one of the chambers is greater than a predetermined value. The disk valve assembly has a bypassing fluid passage which has a plurality orifices configured so as to gradually decrease fluid pressure and flow velocity of the working fluid passing therethrough.
REFERENCES:
patent: 3756357 (1973-09-01), Graff et al.
patent: 4460074 (1984-07-01), Muller et al.
patent: 4512447 (1985-04-01), Miura
patent: 4809828 (1989-03-01), Nakazato
patent: 4834222 (1989-05-01), Kato et al.
Atsugi Motor Parts Company Ltd.
Oberleitner Robert J.
Rutherford Kevin D.
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