Split-back chair, particularly office chair

Details Split-back chair, particularly office chair Split-back chair, particularly office chair

1988-01-27

1989-05-16

McCall, James T.

Chairs and seats

Back movement resiliently opposed in operating position

Back secured to resilient upright bar or rod

297296, 297304, A47C 300, B60N 110

Patent

active

048304301

ABSTRACT:
To permit adjustment of back parts of the chair, spring means, preferably in form of two U-bent spring rods, couple a lower back part (19) to an upper back part (21) and the effective spring length of the springs (23) is adjustable or changeable by moving a slider (27, 29), connected to one (21) of said back parts, for example via an attachment arrangement (23) of the spring elements themselves, longitudinally of the spring elements. Preferably, a positive stop arrangement to maintain an adjusted position is provided; or the adjusted position may be infinitely variable, for example by clamping the spring element in position by means of an eccentric. The ultimate deflection of the respective back parts can be limited by a stop (36) engaging a stop rod (47') which, simultaneously, can function as a slider guide, the stop rod (47), when springy itself, providing for a stiff terminal spring constant while permitting more easily yielding deflection before its engagement.

REFERENCES:
patent: 530880 (1894-12-01), Briggs, Jr.
patent: 764287 (1904-07-01), Gilson
patent: 786326 (1905-04-01), Travers

Affiliated with

Also associated with

Rating

Split-back chair, particularly office chair does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Split-back chair, particularly office chair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Split-back chair, particularly office chair will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2317293