Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1997-03-17
1999-08-10
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
1882991, 18832213, F16F 500
Patent
active
059344229
ABSTRACT:
A shock absorber includes the typical fluid valving in the piston and in the base valve assembly which is designed to provide a firm damping characteristic for the shock absorber. A stepper valve assembly includes a bypass fluid passage between the upper working chamber and the reserve chamber which when opened provides a soft damping characteristic during an extension movement of the shock absorber. The stepper valve assembly also includes a bypass fluid passage between the lower working chamber and the reserve chamber which when opened provides a soft damping characteristic during a compression movement of the shock absorber. The stepper valve assembly selectively opens and closes the bypass fluid passages to adapt the shock absorber to changing vehicle conditions.
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Lipka Pamela J.
Oberleitner Robert J.
Tenneco Automotive Inc.
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