ApplicationNo. 903790 filed on 06/24/1992
US Classes:5/653, Removable support specially adapted for seating5/652.1Ventilated or permitting substantial air or liquid passage
ExaminersPrimary: Saether, Flemming
Attorney, Agent or Firm
International ClassA47C 027/00
AbstractPressure relief for wheelchair patients is improved by use of a relatively higher density foam, such as 2.4 pounds per cubic foot or above and a 25 percent ILD characteristic of at least about 50 pounds, together with independently acting cube shaped segments. The segments have predetermined respective separation and rounded upper edges with a predetermined radius of curvature which is larger about the periphery of the wheelchair pad. A relatively lowered pad thickness of about 3 inches facilitates patient movement onto and off from a wheelchair cushion. A removable covering of laminated materials is stretchable so as to slide over the rounded edges of the segments and down into separations therebetween to maintain independent action of such segments during use with the covering. An upper layer of the covering comprises a base layer of woven fabric of elastic synthetic fibers. A lower layer of the covering comprises a water resistant coating of urethane generally at least about 1 mil thick. The stretchable covering features can be used separately with other forms of patient supports, such as mattress pads having convolutions or other forms of independent support segments with separations therebetween.