Chairs and seats – Movable back
Patent
1997-02-05
1997-12-09
Brown, Peter R.
Chairs and seats
Movable back
297340, 482130, A47C 1032
Patent
active
056952503
ABSTRACT:
A chair with a swivel seat and backrest includes a base support having an upright shaft, a seat having a bottom provided with a supporting board having to two opposite bolts, the two opposite bolts being fixedly installed on two opposite ends of an oscillating plate, the oscillating plate having a central portion pivotally connected with a tubular axle, the tubular axle being put on to the upright shaft of the base support, a backrest, a casing mounted on the upright shaft of the base support and located under the oscillating plate, the casing being provided with a vertical shaft having an upper portion fixedly engaged with the backrest and a lower end fixedly connected with a first gear, two linking rods each having an end pivotally connected a respective end of the oscillating plate, and means pivotally connected with the two linking rods and driven by the first gear.
REFERENCES:
patent: 2568988 (1951-09-01), Childs
patent: 4822093 (1989-04-01), Kawai et al.
patent: 5110121 (1992-05-01), Foster
patent: 5336138 (1994-08-01), Arjawat
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