Chairs and seats – Back movement resiliently opposed in operating position – Back and seat adjust simultaneously
Patent
1987-07-16
1988-12-20
Dorner, Kenneth J.
Chairs and seats
Back movement resiliently opposed in operating position
Back and seat adjust simultaneously
297302, 297304, 297320, A47C 300
Patent
active
047921870
ABSTRACT:
The pivot mechanism is intended for height-adjustable seats, especially office chairs or office armchairs, with a seat (6) and a back 7) arranged at an underframe (8) to be pivotable in synchronism and being under the effect of a pretensionable pullback spring against the tilting motion oriented rearwardly, as well as with a device for locking the back (7) in positions of varying tilt. The pivot mechanism is characterized in that the seat (6) exhibits spring elements (11) effective in the pivoting plane of the back (7), which spring elements are attached to the underframe (8) and to the back (7) and act on the back (7) as pullback springs tensionable by the user's weight.
REFERENCES:
patent: 2296603 (1942-09-01), Feldman
patent: 2619153 (1952-11-01), Van Osselen
patent: 4479679 (1984-10-01), Fries et al.
patent: 4653806 (1987-03-01), Willi
Cranmer Laurie K.
Dorner Kenneth J.
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