Chair control with front to rear torsion bar

Details Chair control with front to rear torsion bar Chair control with front to rear torsion bar

1975-07-21

1977-01-04

McCall, James T.

Chairs and seats

Back movement resiliently opposed in operating position

Constantly oriented during up-and-down movement

248373, 297354, A47C 300

Patent

active

040009254

ABSTRACT:
A chair control for an office-type chair having a seat supporting frame upon which a bucket-type seat is supported. A seat back supporting structure is pivotally supported at its lower end on the frame and is provided at its upper end with a conventional back member. Intermediate its ends, the seat back supporting structure is adjustably connected to a torsion bar so that the torsion bar will yieldably resist backward tilting movement of the seat back member. The torsion bar is mounted on the seat frame and extends front to rear of the seat. This enables a low profile assembly of the chair control and location of the chair control within the outer shell which forms a part of the bucket seat.

REFERENCES:
patent: 3598354 (1971-08-01), Williams
patent: 3602537 (1971-08-01), Kerstholt
patent: 3672721 (1972-06-01), Williams

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