Chairs and seats – Movable bottom – Tiltable
Patent
1985-09-30
1987-08-18
Aschenbrenner, Peter A.
Chairs and seats
Movable bottom
Tiltable
298399, 297301, A42C 300
Patent
active
046872507
ABSTRACT:
A vehicle seat assembly comprises a support frame attachable to a vehicle cab floor by a guide/slide rail assembly. A manually actuatable horizontally swingable lever mounted on the guide/slide rail assembly alongside the seat releasably locks the entire seat assembly is selected fore and aft positions. A seat and pivotally interconnected backrest are pivotally, slidably and resiliently mounted on the support frame. The seat is horizontally shiftable fore and aft on the support frame to vertically tilt the backrest. A manually actuatable vertically pivotable backrest adjustment bar is mounted on and extends horizontally along the front of the seat and releasably locks the seat on the support frame so as to maintain the backrest in selected tilt positions. A resilient suspension, which resiliently supports the seat and backrest on the support frame, includes a pair of helical tension springs having upper ends hooked to the upper rear of the support frame and lower ends connected to the ends of a flexible non-stretchable cable that passes beneath the seat. The cable bight is connected to stationary cable anchors and to an adjustably movable cable adjustment member, both mounted on the underside of the seat. A manually rotatable screw mounted on the front of the seat adjustably positions the cable adjustment member to adjust spring tension to account for differences in seat occupant weight and severity of road shock. Resilient bumpers reduce shock when the seat and backrest reach their vertical travel limits and dampers slow down vertical motion of the backrest.
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Aschenbrenner Peter A.
Kirby Thomas F.
Milsco Manufacturing Company
Nilles James E.
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