Controllable shock absorber for motor vehicles

Details Controllable shock absorber for motor vehicles Controllable shock absorber for motor vehicles

1994-02-17

1995-10-31

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188319, B60G 1708, F16F 950

Patent

active

054621437

ABSTRACT:
A shock absorber for an automotive vehicle includes a damping cylinder having a cylinder chamber containing damping fluid; a damping piston axially slidably received in the damping cylinder and dividing the cylinder chamber into first and second work chambers; pressure-responsive valves mounted on the damping piston for controlling the flow of fluid through the damping piston in the pressing and pulling phases; an axially hollow piston rod affixed to the damping piston and extending axially in the damping cylinder; an outer tube coaxially surrounding the damping cylinder and defining an equalizing chamber therewith; and a bottom valve assembly provided in the second work chamber. The equalizing chamber is in communication with the second work chamber through the bottom valve assembly. There are further provided a first bypass channel coupling the first and second work chambers with one another through the hollow piston rod; a second bypass channel coupling the second work chamber with the equalizing chamber by circumventing a bottom valve of the bottom valve assembly; and a setting device for controlling the first and second bypass channels as a function of relative rotary displacements between the damping cylinder and the piston rod.

REFERENCES:
patent: 3559776 (1971-02-01), Schultze
patent: 4720085 (1988-01-01), Shinbori et al.
patent: 5080205 (1992-01-01), Miller et al.
patent: 5150775 (1992-09-01), Charles et al.
patent: 5180186 (1993-01-01), Charles et al.

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