Brakes – Internal-resistance motion retarder – Valve structure or location
Patent
1996-11-12
1998-10-20
Butler, Douglas C.
Brakes
Internal-resistance motion retarder
Valve structure or location
18832222, 188317, 1882825, 1882828, 188320, 18832213, F16F 934
Patent
active
058233067
ABSTRACT:
A two-stage shock absorber having a pressure tube within which a valve assembly is slidably disposed. A piston rod is attached to the valve assembly and extends out of the pressure tube. In a first embodiment, a ring which is slidably disposed within the pressure tube engages the valve assembly after a specified amount of movement of the valve assembly with respect to the pressure tube In both an extension and compression movement of the shock absorber. The engagement of the ring with the valve assembly reduces the fluid flow through the valve assembly to switch the shock absorber from soft damping to firm damping. In a second embodiment, the ring switches the shock absorber from soft damping to firm damping only during an extension movement.
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Butler Douglas C.
Tenneco Automotive Inc.
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