Dynamic combination seating and backrest support system
First Claim
1. A dynamically inflatable support system comprising:
- a seat cushion having first and second mating sets of inflatable cells, the first set including a pair of spaced-apart elongate longitudinal cells extending along a cushion axis corresponding to the longitudinal axis of a person supported on the support system, the second set including inner cell means positioned between the pair of longitudinal cells, at least one of the first and second sets of cells further including transverse cell means extending laterally between the longitudinal cells intermediate the ends of the longitudinal cells;
pressure means for alternatingly inflating and deflating the first and second sets of cells so that a person seated on the seat cushion is supported primarily by alternate sets of cells; and
a back cushion adapted for extending upwardly along the back of a chair when the support system is positioned on a chair with the seat cushion on the chair seat, the back cushion including two sets of interdigitated elongate laterally extending back cells, with the cells in the two sets alternating in position along the cushion axis, and wherein the pressure means alternately inflates and deflates the first and second sets of back cells.
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Accused Products
Abstract
A seating support cushion system has a seat cushion with an H-shaped inflatable cell, with the sides of the "H" extending parallel to a cushion axis that corresponds to the longitudinal axis of a person sitting on the cushion, and therefore parallel to the thighs. The crossbar cell is midway in the cushion, forward of the location of the position of the ischial tuberosities of a person supported on the cushion. A pair of inner cells fill in the voids of the "H" shape, with one cell in the rear of the cushion positioned for supporting the ischial tuberosities. This rear cell also preferably has a recess for receiving the coccyx without significant pressure, and a secondary crossbar portion adjacent to the crossbar cell. A back cushion has two sets of alternatingly inflated, laterally extending cells forming a spinal recess and contoured to conform to the shape of a person'"'"'s back. The back cushion also has a pair of inflatable, opposing, and longitudinally extending side support cells positioned adjacent to the outer edges of the laterally extending back cells The inflation of the back and seat cells is coordinated so that the top of the pelvis is pressed forward at the same time that the ischial tuberosities are supported. The preischial crossbar cells provide support and resistance to movement of a seated person forward on the cushion.
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Citations
11 Claims
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1. A dynamically inflatable support system comprising:
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a seat cushion having first and second mating sets of inflatable cells, the first set including a pair of spaced-apart elongate longitudinal cells extending along a cushion axis corresponding to the longitudinal axis of a person supported on the support system, the second set including inner cell means positioned between the pair of longitudinal cells, at least one of the first and second sets of cells further including transverse cell means extending laterally between the longitudinal cells intermediate the ends of the longitudinal cells; pressure means for alternatingly inflating and deflating the first and second sets of cells so that a person seated on the seat cushion is supported primarily by alternate sets of cells; and a back cushion adapted for extending upwardly along the back of a chair when the support system is positioned on a chair with the seat cushion on the chair seat, the back cushion including two sets of interdigitated elongate laterally extending back cells, with the cells in the two sets alternating in position along the cushion axis, and wherein the pressure means alternately inflates and deflates the first and second sets of back cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification