Damping force control type of hydraulic shock absorber

Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber

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Details

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: 5129488 (1992-07-01), Furuya et al.
patent: 5178242 (1993-01-01), Nakamura et al.
patent: 5226512 (1993-07-01), Kanari
patent: 5242038 (1993-09-01), Yamaoka
patent: 5248014 (1993-09-01), Ashiba

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