Adjustable vibration damper

Details Adjustable vibration damper Adjustable vibration damper

1988-06-06

1989-11-14

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188298, 188315, 188318, 18832213, 280707, 280714, B60G 1708, F16F 950, F16F 1504

Patent

active

048800864

ABSTRACT:
Adjustable vibration damper, in particular for motor vehicles, with a cylinder containing a damping fluid, an axially-movable piston rod inserted in the cylinder in a sealed manner, and a damping piston fastened to the piston rod, which piston divides the cylinder into two work chambers, whereby a damping valve with an axially-movable valve body and a valve seat controls the effective cross section of a damping passage. Control of such a vibration damper should guarantee a continuous adjustment capability, a high adjustment speed, a good temperature behavior and reliably reproducible damping force characteristics, as well as the use of a small amount of control energy. For this purpose, starting from its pressurized end surface, the valve body comprises at least one constant throttle hole running toward the opposite rear side, and another throttle hole running from the rear side in the discharge direction of the damping passage is controlled by a continuously adjustable control pin, whereby the rear side of the valve body and the housing guiding the valve body form a control chamber.

REFERENCES:
patent: 3584712 (1971-06-01), Dickinson
patent: 3621950 (1971-11-01), Lutz
patent: 3991863 (1976-11-01), Lee
patent: 4010829 (1977-03-01), Naito et al.
patent: 4054277 (1977-10-01), Sirven
patent: 4325468 (1982-04-01), Siorek
patent: 4445673 (1984-05-01), Clark
patent: 4502673 (1985-03-01), Clark
patent: 4597411 (1986-07-01), Lizell
patent: 4650042 (1987-03-01), Knecht et al.
patent: 4749069 (1988-06-01), Knecht et al.
patent: 4752062 (1988-06-01), Domenichini
patent: 4785920 (1988-11-01), Knecht et al.
patent: 4802561 (1989-02-01), Knecht et al.

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