Chairs and seats – Back movement resiliently opposed in operating position – Back and seat adjust simultaneously
Patent
1986-07-25
1988-01-12
Dorner, Kenneth J.
Chairs and seats
Back movement resiliently opposed in operating position
Back and seat adjust simultaneously
297301, 297326, 297328, A47C 1024
Patent
active
047187255
ABSTRACT:
Support and adjusting mechanism for the seat and backrest of a work chair having a pedestal with feet and a vertical support column comprises a support part fixed on the upper end of the support column and having laterally spaced, parallel upwardly extending support flanges. A seat support has laterally spaced, parallel downwardly extending flanges which partially overlap and are pivotally connected with the flanges of the support part. A backrest support has laterally spaced, parallel, forwardly extending flanges partially overlapping and pivotally connected with the flanges of the support part and also the flanges of the seat support. A coupling lever has spaced, parallel flanges which partially overlap and are pivotally with the flanges of the support part, the seat support and the backrest support. An air spring acts between a lower region of the support part and a lower region of the backrest support.
REFERENCES:
patent: 2650646 (1953-09-01), Herold et al.
patent: 2746520 (1956-05-01), Ducrot
patent: 2859799 (1958-11-01), Moore
patent: 4143910 (1979-03-01), Geffers et al.
patent: 4596421 (1986-06-01), Schmitz
Suhr Heinz-Peter
Weinberger Bernd
Brown Peter R.
Burns Robert E.
Dorner Kenneth J.
Firma August Froscher G.m.b.H. & Co. K.G.
Lobato Emmanuel J.
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