Chair with swivelling seat and backrest portions

Details Chair with swivelling seat and backrest portions Chair with swivelling seat and backrest portions

1984-09-19

1987-05-26

Aschenbrenner, Peter A.

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

297301, A47C 103

Patent

active

046680128

ABSTRACT:
The seat member and the back member are adjustably mounted at each side of the chair in two support bearings or pivot joints of a chair base and are connected to one another by a third pivot joint. The seat member comprises an extension in the direction of the back member while the back member is maintained in spaced relationship to the third pivot joint by part of a lower strut portion on each side of the chair. A spring element is mounted at its ends on the free end of the extension part of the seat member and on the back member. In transition from the working position (full lines) into the relaxed or reclined position (broken lines), a relative motion is superimposed upon the pivoting motions of the seat member and of the back member. This relative motion produces unequal vertical downward displacements of the free end of the seat extension and of the backrest portion where it joins the strut portion. The action of this relative motion avoids the otherwise inevitable stretch effect on the occupant of the chair without requiring the supplementary linkages employed in known constructions.

REFERENCES:
patent: 3989297 (1976-11-01), Kerstholt
patent: 4143910 (1979-03-01), Geffers
patent: 4362335 (1982-12-01), Drabert et al.
patent: 4432582 (1984-02-01), Weismann et al.
patent: 4502729 (1985-03-01), Locher
patent: 4509793 (1985-04-01), Weismann et al.

Affiliated with

Also associated with

Rating

Chair with swivelling seat and backrest portions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chair with swivelling seat and backrest portions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chair with swivelling seat and backrest portions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-699235