Chairs and seats – Bottom or back with means to alter contour – Providing support for lower back region
Patent
1996-08-19
1997-10-21
Nelson, Jr., Milton
Chairs and seats
Bottom or back with means to alter contour
Providing support for lower back region
2972843, 2972849, 29745241, 297DIG3, A47C 454
Patent
active
056788916
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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Linley Peter W.
O'Neill Hugh
Anderson Edward B.
Jr. Milton Nelson
Linley Peter W.
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