Adjustable chair

Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

2973022, 2973024, 2973032, 297329, A47C 1024

Patent

active

055778020

ABSTRACT:
A chair comprises a base with a fixed stem extending vertically from the base and a track member mounted to the top of the stem. The track member is a segment of a circle, the center of which is forward of the chair and coincident with either the knee or ankle of the person utilizing the chair. A carriage having wings which are concentric with the track slides in the track. A seat is mounted on the carriage. The disclosure also relates to a backrest for a chair which pivots around an axis coincident with the H point axis relative to the chair, and to a chair which can shift in response to a person sitting on the chair, the chair also comprising a backrest which pivots around the H point.

REFERENCES:
patent: 117915 (1871-08-01), Morrison
patent: 137091 (1873-03-01), Parker
patent: 160624 (1875-03-01), Spencer
patent: 465719 (1891-12-01), Mitchell
patent: 673578 (1901-05-01), Johnson
patent: 975019 (1910-11-01), Cogger
patent: 2217756 (1940-10-01), Lichter
patent: 2313023 (1943-03-01), Ruegger
patent: 2492106 (1949-12-01), Orton
patent: 2492110 (1949-11-01), Prosser et al.
patent: 2611420 (1952-09-01), Diehl
patent: 3999799 (1976-12-01), Daswick
patent: 4383714 (1983-05-01), Ishida
patent: 4547017 (1983-12-01), Lescure
patent: 4650249 (1987-03-01), Serber
patent: 4709960 (1987-12-01), Launes
patent: 4715654 (1987-12-01), Laskowitz
patent: 4738487 (1988-04-01), Shalinsky et al.
patent: 4981326 (1991-01-01), Heidman
patent: 5024484 (1991-06-01), Buchacz
patent: 5026117 (1991-06-01), Faiks et al.
patent: 5042876 (1991-08-01), Faiks
patent: 5048893 (1991-09-01), Cowan et al.
patent: 5052753 (1991-10-01), Buchacz
patent: 5121934 (1992-06-01), Decker et al.
Society of Automotive Engineers (SAE) Handbook, 1986, pp. 34.32-34.35; 34.55; 34.57.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Adjustable 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 Adjustable chair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable chair will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1967761

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.