Pivot mechanism for seats

Details Pivot mechanism for seats Pivot mechanism for seats

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

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