Title: Chair control

Abstract: A chair control for adjustment of the rest position of a resiliently pivotable chair back, and of the degree of resiliency of the connection of the chair back to the chair frame. A spring brace is mounted on the frame beneath the seat and provides an aperture. A rod assembly connected to the chair back at a universal joint has its remote and extending through the aperture, the rod assembly being slidable through the aperture. A spring tension handwheel concentric with the rod assembly is disposed between the spring brace and the universal joint, and is internally threaded for axially adjustable connection to the rod assembly. A spring retainer is provided on the face of the spring brace nearest the universal joint, and has an aperture corresponding with the spring brace aperture. A compression spring concentric with the rod assembly is confined between the spring retainer and the spring tension handwheel. The chair control further comprises rod assembly front travel stop means adjacent the rod assembly remote end and engageable with the spring brace, and chair back rest position control means connected to the rod assembly for adjusting the distance between the front travel stop means and the universal joint.

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Inventors: Parker, James A. (Orange, MA, US)

Application Number: 024402
Filing Date: 1979-03-26
Publication_date: 1980-11-11
Assignee: Collier-Keyworth Company (Gardner, MA)
Primary Class(es): 297/300.5 248/578, 297/300.6, 297/303.5
Other Classes:
US Patent Ref:

366262	Jul, 1887	Schumacher	248/578.
1586166	May, 1926	Travers	248/578.
1986105	Jan, 1935	Foote	297/304.
2188605	Jan, 1940	Herold	297/304.
2249750	Jul, 1941	Dickson	297/305.
2410871	Nov, 1946	Fields et al.	297/305.

Other Refs:
Primary Examiner: Zugel, Francis K.
Assistant Examiner:
Attorney: