Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1978-12-26
1980-11-11
Reger, Duane A.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
F16F 934
Patent
active
042327679
ABSTRACT:
A hydraulic telescopic shock absorber filled with a damping medium in which a piston and a piston rod are reciprocatingly arranged. The piston head which divides the cylinder into two portions is provided with a plurality of longitudinally extending and circumferentially spaced passages extending therethrough. The passage openings on the lower surface of the piston head are closed by a ring-shaped resilient valve. A rigid pie-shaped closing member is coaxially and movably mounted about the piston rod on the upper surface of the piston head. The closing member includes a longitudinally extending adjustment tab which engages an adjustment pin which is fixedly mounted to the lower surface of the cylinder cap. The passages are selectively opened or closed by extending the piston rod until the pin engages the tab and thereafter rotating the piston rod to expose the desired number of passages.
REFERENCES:
patent: 967285 (1910-08-01), Wilson
patent: 2148891 (1939-02-01), Applegarth
patent: 3827538 (1974-08-01), Morgan
IT&T Industries, Inc.
Michals William J.
Raden James B.
Reger Duane A.
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