Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Patent
1989-11-16
1991-01-22
Brown, Peter R.
Chairs and seats
Back movement resiliently opposed in operating position
Back adjusts independent of seat
297320, A47C 1032
Patent
active
049866010
ABSTRACT:
A tilting mechamism for supporting a seat portion and a backrest of chair in integral fashion. This mechanism comprising an upright support; a pedestal block mounted on an upper end of the upright support for swivel movement; an arm member pivotally engaged at the rear side thereof by a first horizontal shaft mounted on the pedestal block toward the front of the upright support; a seat plate pivotally engaged at a front portion thereof with the end of this arm member by a second horizontal shaft; an elastic body such as a spring lying between this plate and the block; a backrest supporting member on which a backrest can be mounted, the supporting member being elongated and carried in part on the lower face of the seat plate and pivotally engaged with a long hole formed at the rear end of the seat plate by a third horizontal shaft; the forward part of this supporting member mounted on the pedestal block by the first shaft pivotally engaging the arm member with the block; and a gas spring connecting between a fourth shaft mounted on the front end of this supporting member and the second shaft positioned at the front end of the arm member.
REFERENCES:
patent: 2471024 (1949-05-01), Cramer
patent: 4502729 (1985-03-01), Locher
patent: 4709962 (1987-12-01), Steinmann
patent: 4848837 (1989-07-01), Volkle
Brown Peter R.
Itoki Co. Ltd.
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