Shock absorber with stanchion mounted bypass damping

Details Shock absorber with stanchion mounted bypass damping Shock absorber with stanchion mounted bypass damping

1997-11-14

2000-02-22

Schwartz, Christopher P.

Brakes

Internal-resistance motion retarder

Piezoelectric

1882825, 188316, 188317, 1883191, 1883225, 280275, 280276, F16D 5700

Patent

active

060269391

ABSTRACT:
A dampener (628) for a shock absorber of a vehicle, such as a bicycle, is mounted within a telescoping front fork including a stanchion tube (116) and a coaxial slide tube (618). The dampener includes an internally received hydraulic fluid sleeve (640) that defines a hydraulic chamber (648) in which a piston assembly (732) is disposed. Movement of the piston assembly through hydraulic fluid within the hydraulic chamber is selectively adjusted by metering the flow of bypass hydraulic fluid to the back side of the piston assembly by adjusting a responsive valve assembly (670) disposed longitudinally within the stanchion tube. The responsive valve assembly includes a piezoelectric bender (702) that is controlled by circuitry (712) to change its biasing relative to a valve member (694) in response to sensed velocity and/or displacement of the piston assembly.

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