Chair with a lumbar support

Details Chair with a lumbar support Chair with a lumbar support

1996-12-02

1998-06-02

Brown, Peter R.

Chairs and seats

Bottom or back with means to alter contour

Providing support for lower back region

A47C 746

Patent

active

057589259

ABSTRACT:
A chair has a base, a generally horizontal seat supported on the base, and a generally vertical back supported on the base behind the seat and provided at a predetermined spacing above the seat with a horizontally extending flex joint having formations for permitting free pivoting backward of an upper portion of the back to a predetermined backwardly deflected position and for thereafter resisting further backward deflection. The back comprises a front plate, a cushion carried on the front plate, and a rear plate fixed to the front plate and formed with the flex joint. The formations include a pair of extending flanges extending generally horizontally from the rear plate and a bight interconnecting the two flanges. The flex joint can be unitarily formed with the rear plate. Its flanges are vertically spaced from each other and only touch when the predetermined backwardly deflected position is reached.

REFERENCES:
patent: 4444430 (1984-04-01), Yoshida et al.
patent: 4615563 (1986-10-01), Kobayashi
patent: 4690456 (1987-09-01), Chiba et al.
patent: 4862533 (1989-09-01), Adams, III
patent: 4960304 (1990-10-01), Frantz
patent: 5076643 (1991-12-01), Colasanti et al.
patent: 5137329 (1992-08-01), Neale
patent: 5406661 (1995-04-01), Pekar
patent: 5562324 (1996-10-01), Massara et al.

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