Edge-shear reduction in body support foam pads

Details Edge-shear reduction in body support foam pads Edge-shear reduction in body support foam pads

1990-08-20

1991-09-17

Trettel, Michael F.

Beds

Bedclothing

And means to facilitate changing thereof

5461, 5481, A47C 2714

Patent

active

050481371

ABSTRACT:
Shear stress on the skin is relieved at cavity edges in a resilient foam pad by cavity walls shaped to define a region of diminished support under the cavity edge. The edge material yields more easily under loading and may roll into the cavity to avoid pressing into body tissues. The interior wall or walls of the cavity are slanted outwardly to undercut all or part of the cavity edge to reduce the thickness of material under the edge. The shape and curvature of the cavity and cavity walls can be adapted and tailored to achieve particular pressure gradients and patterns.

REFERENCES:
patent: 1548728 (1925-08-01), Milam
patent: 2659418 (1953-11-01), Berman
patent: 2763013 (1956-09-01), Valkenburgh
patent: 2953195 (1960-09-01), Turck, Jr.
patent: 3885257 (1975-05-01), Rogers
patent: 4955096 (1990-09-01), Gilroy et al.

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