Chair insert having a contoured back support portion and a seat

Details Chair insert having a contoured back support portion and a seat Chair insert having a contoured back support portion and a seat

1990-03-21

1992-05-19

Dorner, Kenneth J.

Chairs and seats

Supplemental back

Including a means to adjust supplemental back relative to a...

297456, A47C 702

Patent

active

051142090

ABSTRACT:
An insert for a chair includes a seat portion and a back portion, and is molded from dense firm rubber, or the like. The seat portion tapers from a front edge to the rear such that the upper surface is essentially parallel with the floor when the insert is installed on the chair. The back portion includes a lower concave front surface fitting the gluteal region of the pelvis, a central convex portion fitting the lumbar curve, and an upper concave portion matching the thoraic kyphotic curve. The use of the insert maintains the user's spine in a natural postion that places the center of gravity of the head over the vertical axis of the spine.

REFERENCES:
patent: 2853124 (1958-09-01), Shapiro
patent: 2855986 (1958-10-01), Engelen, Sr.
patent: 3265437 (1966-08-01), Mincieli
patent: 3361471 (1968-01-01), Radford
patent: 3511537 (1970-05-01), Ackermann
patent: 3953072 (1976-09-01), Esquivel
patent: 4753482 (1988-06-01), Warren
patent: 4810034 (1989-03-01), Beier
patent: 4824169 (1989-04-01), Jarrell

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