Spring devices – Resilient shock or vibration absorber
Patent
1997-08-11
1999-11-02
Butler, Douglas C.
Spring devices
Resilient shock or vibration absorber
188378, 267131, 267 6424, 280124157, 29619007, 180 8912, 248550, B62D 2404, B62D 3310
Patent
active
059755083
ABSTRACT:
A seat of a vehicle is connected to the vehicle body by a support linkage that enables movement of the seat. A hydraulic actuator is connected between the seat and the vehicle body to produce motion which counteracts the influence of the vehicle body movement on the seat. An air bag, coupled between the seat and vehicle body, has a variable spring preload to compensate for differing masses placed on the seat. A motion sensor detects movement of the seat and a displacement sensor detects seat displacement. A force sensor detects a force exerted on the actuator by an operator sitting in the seat. A controller responds to the motion and displacement sensors by operating the actuator to nullify effects of the movement of the vehicle body from acting on the seat, and responds to the force sensor by varying the spring preload of the air bag to maintain the force exerted on the actuator to within a defined range.
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Applied Power Inc.
Butler Douglas C.
LandOfFree
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