Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Patent
1990-09-11
1992-09-29
Brown, Peter R.
Chairs and seats
Back movement resiliently opposed in operating position
Back adjusts independent of seat
297317, 297353, A47C 1032
Patent
active
051509482
ABSTRACT:
A chair which is provided with a seat having an adjustable inclination comprises a seat carrier, which is pivoted by a first pivot to a link arrangement which carry the seat, a back rest, which is carried by a back rest carrier, which is pivoted to the link arrangement by a second pivot, and a device for shifting the chair from a position for work, in which the seat is approximately horizontal and includes with the back rest an angle of about 90 degrees, to a position for reclining, in which the seat is rearwardly inclined and includes an obtuse angle with the back rest. The shift from the position for reclining to the position for work is effected by movements of the body of the occupant and is assisted by springs. The seat carrier is provided with slide bearings and slots, in which the first pivot is displaceable away from the column as the chair is shifted to its position for reclining. The pivotal movement which is imparted to the back rest by the movement of the body of the occupant is adapted to be a transformed to the displacement by a shifting device which includes pairs of levers. Owing to that design, the center of gravity is displaced so that the back rest can be swung further to the rear without a risk that the stability of the chair might be endangered.
REFERENCES:
patent: 2471024 (1949-05-01), Cramer
patent: 4502729 (1985-03-01), Locher
patent: 4687250 (1987-08-01), Esche
patent: 4693514 (1987-09-01), Volkle
patent: 4848837 (1989-07-01), Volkle
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