Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Patent
1991-10-03
1993-08-24
Brown, Peter R.
Chairs and seats
Back movement resiliently opposed in operating position
Back adjusts independent of seat
297304, A47C 1032
Patent
active
052382940
ABSTRACT:
There is provided an interlocking supporting mechanism for supporting the seat and seat back of a chair, particularly an office chair. In the supporting mechanism a link system is utilized to interlock the seat with the seat back, so that the chair is capable of smoothly moving as a seated person moves.
The front portion of a lever member is pivotally connected to the front portion of a frame member which is supported by a fixing member and which extends toward the front portion of the seat. The lever member is attached, with the aid of horizontal shafts on the right-hand and left-hand sides of the seat, to the lower portions of back supporting bars. A spring member is provided between the frame member and the lever member so that the lever member is rocked on the horizontal shafts. A member for receiving the seat includes a front seat-receiving member and a back seat-receiving member. The front seat-receiving member is provided with the aid of an elastic member so that it can move up and down and right and left, on the front portion of the frame member. The back seat-receiving member is provided, with the aid of shafts parallel with the horizontal shafts, on the back portion of the lever member so that it can rock on these shafts. The seat is supported by the front and back seat-receiving members.
REFERENCES:
patent: 217584 (1879-07-01), Chichester
patent: 4640548 (1987-02-01), Desanta
patent: 4776633 (1988-10-01), Knoblock et al.
patent: 4986601 (1991-01-01), Inoue
patent: 5114211 (1992-05-01), Desanta
Ishi Yuji
Kano Tetsuya
Nagao Toru
Obata Hironaga
Uematsu Yasuo
Brown Peter R.
Itoki Co. Ltd.
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