Chair

Details Chair Chair

1993-12-27

1996-11-19

Dorner, Kenneth J.

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

297322, A47C 1032, A47C 300

Patent

active

055750958

ABSTRACT:
A chair, in particular a work or office chair, having a seat that is pivotal toward the front of the seat about a horizontal pivot axis. The seat is variable in inclination and has a backrest that is overproportionately variable in inclination as a function of the change in inclination of the seat. With increasing inclination of the seat, the backrest follows an additional relative motion with respect to a backrest end of the seat. Pivot levers are positioned to support arms of the chair frame on both sides of the seat. The free ends of the pivot levers are fixedly and non-rotatably attached to the backrest for support. The seat is rotatably connected to the pivot levers approximately in its middle region. The desired relative motions between the seat, seat back and chair frame can be accomplished and varied solely by means of the connection between the seat, the backrest, pivot levers which serve as arm supports or armrests, and the chair frame. The seat, in the region of its front edge, is supported and shifted upward with respect to the pivot shaft of the pivot levers, and is non-adjustably or limitedly adjustably rotatable on extensions of the support arms. The axis of rotation between the pivot levers and the seat is limitedly adjustable or non-adjustable.

REFERENCES:
patent: 4429917 (1984-02-01), Diffrient
patent: 4616877 (1986-10-01), Slaats et al.
patent: 4668012 (1987-05-01), Locher
patent: 4732424 (1988-03-01), Uredat-Neuhoff
patent: 5100200 (1992-03-01), Keusch et al.
patent: 5193880 (1993-03-01), Keusch et al.
patent: 5308144 (1994-05-01), Korn

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