Seat leveling device
First Claim
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1. Apparatus for adjustable seat suspension, said apparatus utilizable with seats of the type having a base attached to the floor of a vehicle, a pedestal supporting a seat, and structure joining said pedestal and said base enabling said pedestal to move with respect to said base thereby raising or lowering said seat, said apparatus comprising:
- means to adjust the height of said seat with respect to said base;
means to control said adjustment means,said control means adapted to enable the positioning of said seat with respect to said base,said control means having a first attitude, a second attitude, and a third attitude; and
means to actuate said control means responsive to movement or deflection of said pedestal,said actuating means including a link arm having two ends,the first of said ends being connected to said control means,the second of said two ends positioned to contact said floor when said seat is lowered a pre-selectable distance;
said link arm having a slot formed therethrough intermediate said first and second ends,said actuating means further including means positionable within said slot to direct the motion of said link arm with respect to said control means when said seat is being raised with respect to said base.
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Abstract
A seat leveling apparatus for air-suspension seats of the type used in over-the road vehicles moves the seat to its lowermost position when the driver alights therefrom. When the driver reenters the seat, apparatus is provided to raise the seat to a preselected driving position responsive to the weight of the driver on the seat.
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Citations
20 Claims
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1. Apparatus for adjustable seat suspension, said apparatus utilizable with seats of the type having a base attached to the floor of a vehicle, a pedestal supporting a seat, and structure joining said pedestal and said base enabling said pedestal to move with respect to said base thereby raising or lowering said seat, said apparatus comprising:
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means to adjust the height of said seat with respect to said base; means to control said adjustment means, said control means adapted to enable the positioning of said seat with respect to said base, said control means having a first attitude, a second attitude, and a third attitude; and means to actuate said control means responsive to movement or deflection of said pedestal, said actuating means including a link arm having two ends, the first of said ends being connected to said control means, the second of said two ends positioned to contact said floor when said seat is lowered a pre-selectable distance; said link arm having a slot formed therethrough intermediate said first and second ends, said actuating means further including means positionable within said slot to direct the motion of said link arm with respect to said control means when said seat is being raised with respect to said base. - View Dependent Claims (2, 3, 4, 5, 6, 7, 20)
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8. Apparatus for seat suspension, said suspension of the type having a base attached to the floor of a vehicle or the like, a supporting pedestal, a seat thereon, and structure joining said base to said support pedestal whereby said support pedestal may be raised or lowered with respect to said base, said structure including a first pivot shaft joining said structure to said support pedestal, and a second pivot shaft joining said structure to said base, said apparatus comprising:
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means to position said support pedestal relative to said base, said positioning means including an air spring joined to said support pedestal; means to control air flow to and from said air spring, said control means including an air supply valve, said air supply valve operating in a first mode to allow air to enter said air spring, a second mode to maintain air within said air spring, and a third mode to exhaust air from said air spring; and means to actuate said control means, said actuating means including a first arm adapted to place said air supply valve in one of said modes, a second arm having two ends, said second arm connected to said first arm at the first of said ends, said second arm adapted to move said first arm at the first of said ends, said second arm adapted to move said first arm responsive to the weight of an occupant either sitting down upon or alighting from said seat, an outer housing mounted to said support pedestal, a link arm assembly pivotally maintained within said housing, said housing having at least one slot formed therethrough, said slot having a plurality of detents formed therealong, said link arm assembly having at least one pin traveling in said slot, said link arm assembly being connected to said air supply valve, said air supply valve operating in said first mode when said pin rests in a first of said detents, operating in said second mode when said pin rests in a second of detents, operating in said third mode when said pin rests in a third of said detents. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification