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US 4,603,445 AGranted
Support pad and method of manufacture
AssigneeSpan-America Medical Systems, Inc.
InventorDonald C. Spann
Life of this patent
Estimating the term…
Abstract
A unitary support pad constructed of synthetic foam is described especially for use as a mattress pad for hospital patients. The pad has a number of discrete upstanding projections being independently compressible and formed in the pad so as to provide a generally flat surface with voids between the projections, preferably extending entirely through the pad, formed by compressing the foam, in discrete areas, which is severed as through the action of a transverse band saw while compressed.
Claims2
A foam pad, comprising:
- a foam block having upper and lower surfaces;
- a plurality of upstanding four-sided projections integrally associated in checkerboard patterns on both of said surfaces of said block, and having planar apex surfaces;
- a generally flat surface on at least one surface of said block, said flat surface being defined by said planar apex surfaces;
- a plurality of generally four-sided voids, defined by said block, on each side of a plurality of said projections and extending completely through said block;
- connecting foam portions integrally joining corners of said projections, at points thereof beneath said flat surface, to corners of adjacent projections;
- and
- said projections having planar sidewalls slightly slanted from being perpendicular to said flat surface, and said connecting foam portions having quadralateral cross-sections in a plane perpendicular to said flat surface.
4 more elements
Dependencies are inferred from the claim text.