Chairs and seats – Back movement resiliently opposed in operating position – Back and seat adjust simultaneously
Patent
1984-06-27
1987-02-10
Dorner, Kenneth J.
Chairs and seats
Back movement resiliently opposed in operating position
Back and seat adjust simultaneously
297304, 297292, A47C 300
Patent
active
046418857
ABSTRACT:
The work chair is provided with a one-piece chair shell (8), in the rear region of which an integrally incorporated hinge portion (11) is formed between the lumbar region and buttocks portion (12) and the backrest portion (11). The seat shell (13) contains a base bearer (14) which forms part of an adjusting mechanism and on which the chair shell (8) is suspended for longitudinal movement by means of spring-loaded pivoting members (27, 32). The base bearer (14) and the backrest portion (10) are connected together with the aid of a control member (36) fastened by guide means (37, 38), in such a manner that a variation of the inclination of the backrest portion (10) caused by an adjusting force brings about a simultaneous variation of the inclination of the seat shell (13) in the same direction. Through the elimination of the adjusting force, the backrest portion is returned to its normal position or position of rest.
REFERENCES:
patent: 3542422 (1970-11-01), Flint
patent: 3603640 (1971-09-01), Doerner
patent: 4084850 (1978-04-01), Ambasz
patent: 4200332 (1980-04-01), Brauning
patent: 4451085 (1984-05-01), Franck et al.
patent: 4479679 (1984-10-01), Fries et al.
Chen José V.
Dorner Kenneth J.
Protoned B.V.
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