Pressure relief cushion

Details Pressure relief cushion Pressure relief cushion

1989-07-26

1990-08-28

Trettel, Michael F.

Beds

Having safety device

Side guard

5436, 5468, 5481, 297459, A47C 2700

Patent

active

049513346

ABSTRACT:
A pressure relief cushion with a gross effective spring rate of from about 75 to about 300 pounds per inch is disclosed. This cushion contains at least two different resilient materials, each of which has a different identation force deflection rating; and it also has a substantially U-shaped aperture in its back side.

REFERENCES:
patent: 2085296 (1937-06-01), Carey
patent: 2257848 (1941-10-01), Larkin
patent: 3833259 (1974-09-01), Pershing
patent: 3987507 (1976-10-01), Hall
patent: 4122567 (1978-10-01), Hanson
patent: 4682818 (1979-07-01), Morell
patent: 4688285 (1987-08-01), Roberts
patent: 4819288 (1989-04-01), Lowthian
patent: 4824174 (1989-04-01), Dunn, Sr.
Literature on the "Profile Seating Orthosis" Published 1983, 1985 by AliMed Inc., Boston, MA 02111.
Literature on the "Tush Cush" Orthopedic Cushion published 1986, by KDI Inc., San Diego, CA 92131.

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