Adjustable seat cushion with tension limiting means

Details Adjustable seat cushion with tension limiting means Adjustable seat cushion with tension limiting means

1986-12-18

1987-12-15

Dorner, Kenneth J.

Chairs and seats

Bottom or back with means to alter contour

244122R, 297216, A47C 714, B64D 1106, B64D 2504

Patent

active

047128348

ABSTRACT:
A bottom cushion for use in a seat of the type used in situations where an occupant could be subjected to spine damaging injury resulting from rapid vertical acceleration or deceleration. The seat cushion includes a frame mounted above the rigid seat pan of the seat with an air-permeable, flexible membrane suspendingly carried in the frame. The seat cushion is provided with a membrane adjusting mechanism by which an occupant applies tension to the membrane to lift his or her posterior above the seat pan for comfort reasons, and has a vertical displacement limiting mechanism which for safety reasons prevents the occupant from lifting the membrane and his or her posterior an excessive distance above the set pan.

REFERENCES:
patent: 280004 (1883-06-01), Bakewell
patent: 1182854 (1916-05-01), Poler
patent: 2692010 (1954-10-01), Christie
patent: 3178221 (1965-04-01), Schwartz
patent: 3208794 (1965-09-01), Gunn
patent: 3273877 (1966-09-01), Geller et al.
patent: 4462635 (1984-07-01), Lance

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