Pressure relief back cushion

Details Pressure relief back cushion Pressure relief back cushion

1993-08-04

1995-09-26

Cranmer, Laurie K.

Chairs and seats

Bottom or back

Contoured back

29745227, 29725235, 29745237, 297DIG1, A47C 702

Patent

active

054529409

ABSTRACT:
An integral lower back pressure relief cushion with a substantially U-shaped aperture at the lower portion of the cushion open at the bottom and extending from the front to the rear of the cushion, such that the sacral and coccyx areas of the user are free from pressure contact while the portions of the cushion on either side of the aperture support the posterior superior iliac spine of the user, the cushion comprising at least three segments of resilient material, a removable convex shape in the front side above the aperture, and the rear side having a convex side and support base.

REFERENCES:
patent: 2855986 (1958-10-01), Engelen
patent: 3749442 (1973-07-01), Berg et al.
patent: 4189182 (1980-02-01), Rhoe
patent: 4951334 (1990-08-01), Maier
patent: 5039158 (1991-08-01), Maier

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