Seat cushion with portions with different compression characteri

Details Seat cushion with portions with different compression characteri Seat cushion with portions with different compression characteri

1987-12-01

1989-06-13

Smith, Gary L.

Beds

Bedclothing

And means to facilitate changing thereof

5481, 297459, 297DIG1, A47C 718

Patent

active

048378810

ABSTRACT:
A seat cushion with compression characteristics which differ by portions including an upper layer portion, which is made of a low hardness foamed body and forming an entire surface of the seat, and a lower layer portion, which is made of a high hardness foamed body and supporting the upper layer portion, the upper and lower layer portions being soft composition polyurethane foamed bodies and molded in a same foaming mold to form an integral body with a strong boundary portion formed along their interface. A basic profile of the upper layer portion is a sloped plane with its height increased toward a front, edge, in the longitudinal direction, while that of the lower layer portion corresponds to a sitting posture of a human body occupying the seat. In a hind seat portion, a thickened portion is provided for the entire surface in a transverse direction by thickening the low hardness foamed body into having a cross section of a concaved arc form in the longitudinal direction by approximating the sitting posture line of a buttocks. In a front seat portion, on either a right or left side, the upper layer portion is made thicker than the basic profile by gradually increasing its thickness toward the front edge in sloped form, in the longitudinal direction, with this thickened portion shaped into a circular arc form in the transverse direction.

REFERENCES:
patent: 4405681 (1983-09-01), McEvoy
patent: 4682818 (1987-07-01), Morell
patent: 4726086 (1988-02-01), McEvoy
patent: 4726624 (1988-02-01), Jay
patent: 4755411 (1988-07-01), Wing et al.

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