Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1992-12-04
1994-11-29
Butler, Douglas C.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
188299, 18832215, 188282, 18832222, F16F 944
Patent
active
053681428
ABSTRACT:
A damping force control type of hydraulic shock absorber includes a cylinder in which a piston is fitted to define two chambers. A main hydraulic fluid passage extends between the chambers, and a damping force generating mechanism is provided in the passage. A bypass passage is also provided between the two chambers. Two check valves are provided in the bypass passage and allow hydraulic fluid to flow in opposite directions, respectively, through the bypass passage. A first hydraulic fluid passage bypasses the first check valve and a second hydraulic fluid passage bypasses the second check valve. A control valve is provided to vary the sectional area of each of the first and second hydraulic fluid passages.
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patent: 5226512 (1993-07-01), Kanari
patent: 5242038 (1993-09-01), Yamaoka
patent: 5248014 (1993-09-01), Ashiba
Ashiba Masahiro
Nakadate Takao
Butler Douglas C.
Tokico Ltd.
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