Vibration mode responsive variable damping force shock absorber

Details Vibration mode responsive variable damping force shock absorber Vibration mode responsive variable damping force shock absorber

1990-11-14

1992-07-14

Peters, Jr., Joseph F.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

188317, 18832215, F16F 950

Patent

active

051294885

ABSTRACT:
A variable damping force shock absorber includes a cylinder tube defining therein two axially aligned fluid chambers separated by a piston. The fluid chambers are connected via first and second fluid paths for fluid communication therebetween. A high damping force generating valve is disposed in the first fluid path. A low damping force generating valve is disposed in the second fluid path. A variable orifice is also formed in the second fluid path. The variable orifice is associated with a control valve which adjusts fluid path area of the variable orifice. The control valve is axially shiftable for adjusting the orifice area. A pressure chamber is formed opposing one axial end of the control valve, which pressure chamber is in fluid communication with one of the fluid chamber via the variable orifice. A bias means is active on the other axial end of the control valve, remote from the pressure chamber, for exerting a bias force in a direction opposite to the force exerted by working fluid in the pressure chamber.

REFERENCES:
patent: 4453638 (1984-06-01), Wallace
patent: 4610332 (1986-09-01), Mourray
patent: 4620619 (1986-11-01), Emura et al.
patent: 4832162 (1989-05-01), Bacardit
patent: 4895229 (1990-01-01), Kato
patent: 4953671 (1990-09-01), Imaizumi
patent: 4972928 (1990-11-01), Sirven
patent: 4997068 (1991-03-01), Ashiba

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