Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Patent
1993-02-25
1996-04-30
Cranmer, Laurie K.
Chairs and seats
Back movement resiliently opposed in operating position
Back adjusts independent of seat
297353, 297383, 297298, A47C 300
Patent
active
055118526
ABSTRACT:
An apparatus is provided for adjusting the position of a backrest relative to a chair seat. The backrest includes an elongated stem having a curved lower portion. Preferably, a spring operably engages the stem to bias it in an upward direction. A housing is adapted to slidably receive the curved portion of the stem and guide the spring. A latch mechanism is adapted to engage the stem to lock the backrest in a desired position, and an actuator member is adapted to move the latch mechanism between an engaged and disengaged position. In operation, the latch mechanism is disengaged to allow the backrest stem to move in a curvilinear path to a desired height and corresponding angular position, and reengaged to lock the backrest stem in said position.
REFERENCES:
patent: 910357 (1909-01-01), Case
patent: 1927491 (1933-09-01), Gabb
patent: 2271925 (1942-02-01), Niles
patent: 2272980 (1942-02-01), McCellan et al.
patent: 2307621 (1943-01-01), Dorton
patent: 2313023 (1943-03-01), Ruegger
patent: 2369580 (1945-02-01), Koenig
patent: 2845994 (1958-08-01), Thompson
patent: 3224807 (1965-12-01), Welch et al.
patent: 3232574 (1966-02-01), Ferro
patent: 3351379 (1967-11-01), Street
patent: 4102549 (1978-07-01), Morrison et al.
patent: 4372609 (1983-02-01), Boisset
patent: 4406497 (1983-09-01), Kluting
patent: 4429917 (1984-02-01), Diffrient
patent: 4529247 (1985-07-01), Stampf et al.
patent: 4536031 (1985-08-01), Latone
patent: 4660885 (1987-04-01), Suhr et al.
patent: 4776633 (1988-10-01), Knoblock et al.
patent: 4795212 (1989-01-01), Bailey et al.
patent: 4861106 (1989-08-01), Sondergeld
patent: 5024484 (1991-06-01), Buchacz
Kusiak James L.
Schoenfelder Rodney C.
Cranmer Laurie K.
Herman Miller Inc.
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