Chairs and seats – Bottom or back with means to alter contour
Patent
1983-03-30
1985-08-13
Downey, Kenneth
Chairs and seats
Bottom or back with means to alter contour
A47C 300
Patent
active
045345929
ABSTRACT:
A lumbar support adjusting apparatus has a release plate pressed against a ratchet by a compression spring for urging the release plate under uniform resilient forces, and biased to return in its direction of rotation by a torsion spring, preferably a spiral spring, having one end secured to a shaft and the other end to a support plate. The compression force of the compression spring, and the torsional force of the spiral spring can be set independently of each other. The release plate can turn the ratchet and can be angularly returned to its original position smoothly and reliably without fail.
REFERENCES:
patent: 3973797 (1976-08-01), Obermeier et al.
patent: 4019777 (1977-04-01), Hayashi
patent: 4162807 (1979-07-01), Yoshimura
Aisin Seiki Kabushiki Kaisha
Downey Kenneth
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