Brakes – Internal-resistance motion retarder – Resistance alters relative to direction of thrust member
Patent
1995-02-21
1996-03-12
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Resistance alters relative to direction of thrust member
188319, 18832215, 280714, F16F 950
Patent
active
054978629
ABSTRACT:
In a hydraulic shock absorber having a variable damping force characteristic structure, at least one extension phase one-way passageway and one compression phase one-way passageway are formed in a piston body so as to allow a fluid flow to be communicated between a first chamber and a second chamber in the extension and compression phases, respectively, and a grooved control rod forms a control valve element rotatably disposed in a hollow rod extended in a cylinder containing damping fluid. Extension and compression phase throttles are formed in the extension and compression phase one-way passageways by ports radially penetrated through a side wall of the hollow rod and the grooved control rod whose fluid cross sectional areas are varied according to a rotated position of the grooved control rod. In addition, four disc-shaped damping valves are formed in an interior of the cylinder.
REFERENCES:
patent: 4826207 (1989-05-01), Yoshioka et al.
patent: 5307907 (1994-05-01), Nakamura et al.
patent: 5404973 (1995-04-01), Katoh et al.
Patent Abstracts of Japan, vol. 12, No. 131 (M-688), JP 62-253507, Nov. 1987.
Oberleitner Robert J.
Unisia Jecs Corporation
Young Lee W.
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