Chairs and seats – Back movement resiliently opposed in operating position – Back and seat adjust simultaneously
Patent
1986-06-09
1987-09-22
McCall, James T.
Chairs and seats
Back movement resiliently opposed in operating position
Back and seat adjust simultaneously
297312, A47C 300, A47C 1032
Patent
active
046950931
ABSTRACT:
A work chair (10) has a seat (15) divided into a forward seat part (15.1) and a rear seat part (15.3) of which the forward seat frame part (17.1) and rear seat and back frame part (17.2) are connected with one another by a hinge joint with a hinge axis (18). The frame parts are supported on a pedestal (11) by seat frame supports (20,21). On the column (13) of the pedestal there is provided a column support part (25) which carries the pivot axis (23) and a swivel support part (28). On the pivot axis (23) seat frame supports (21) are mounted. The swivel support part (28) is tiltable by means of an inclination adjusting device with an actuating handle (6) for tilting the plane (E). The swivel support part (28) has forwardly an elongated bearing opening in which the sliding axis (22) is slidable against the force of an adjustable spring. The sliding axis (22) carries the seat frame support (20). The sliding axis can be secured against sliding by an arresting device having an arresting lever (51) with a swivel bar (52). The spring force can be adjusted by means of an elbow lever. For this purpose a grip (45.4) is provided. By swinging the arresting lever (51) up, a pivoting about the pivot axis (23) can be effected by pressure on the backrest (16) with a lowering of the rear surface of the seat (15), while the forward rounded seat region (15.6) maintains its height.
REFERENCES:
patent: 4143910 (1979-03-01), Geffers et al.
patent: 4380352 (1983-04-01), Diffrient
patent: 4390206 (1983-06-01), Faiks et al.
patent: 4411469 (1983-10-01), Drabert et al.
patent: 4521053 (1985-06-01), DeBoer
Suhr Heinz-Peter
Weinberger Bernd
Burns Robert E.
Firma August Froscher G.m.b.H. & Co. K.G.
Lobato Emmanuel J.
McCall James T.
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