Locking chair tilt mechanism with torsion bar

Details Locking chair tilt mechanism with torsion bar Locking chair tilt mechanism with torsion bar

1991-09-18

1993-04-20

Brittain, James R.

Chairs and seats

Back movement resiliently opposed in operating position

Adjustable resistance

248394, A47C 300

Patent

active

052038530

ABSTRACT:
A locking chair tilt mechanism for a chair in which the backrest and rear seat portion tilt rearwardly and downwardly, and the front seat portion of the chair slides generally horizontally is disclosed. The chair is supported by a tilt mechanism mounted between the base and the chair. Front and rear support arms extend from the biasing member mounted on top of the base, to the chair frame. The front support arm is slidably and pivotably mounted to the chair frame to create the horizontal sliding movement of the front portion of the chair. The locking mechanism mounts immediately adjacent the elongated opening and comprises a pivotable locking bar, a high pitch screw fixedly attached to said bar, a rack with a first set of teeth and a gripping member threadably mounted on said screw with a second set of teeth. The first and second set of teeth are selectively cooperable upon rotation of the locking bar and screw through movement of the threadably mounted gripping member.

REFERENCES:
patent: 2158453 (1939-05-01), Wood
patent: 2303308 (1942-11-01), McArthur
patent: 2429017 (1947-10-01), De Rose
patent: 3870269 (1975-03-01), Werner et al.
patent: 4099775 (1978-07-01), Mizelle
patent: 4304384 (1981-12-01), Cremer
patent: 4314728 (1982-02-01), Faiks
patent: 4375301 (1983-03-01), Pergler et al.
patent: 4390206 (1983-06-01), Faiks et al.
patent: 4432582 (1984-02-01), Wiesmann et al.
patent: 4438898 (1984-03-01), Knoblauch et al.
patent: 4451085 (1984-05-01), Franck et al.
patent: 4494795 (1985-01-01), Roossien et al.
patent: 4502729 (1985-03-01), Locher
patent: 4509793 (1985-04-01), Wiesmann et al.
patent: 4513937 (1985-04-01), Langmesser, Jr. et al.
patent: 4537445 (1985-08-01), Neuhoff
patent: 4653806 (1987-03-01), Willi
patent: 4668012 (1987-05-01), Locher
patent: 4695093 (1987-09-01), Suhr et al.
patent: 4707029 (1987-11-01), Korn
patent: 4718726 (1988-01-01), Estkowski et al.
patent: 4773706 (1988-09-01), Hinrichs
patent: 4776633 (1988-10-01), Knoblock et al.
patent: 4792187 (1988-12-01), Desanta
patent: 4805865 (1989-02-01), Goforth
patent: 4840426 (1989-06-01), Vogtherr et al.
patent: 4865384 (1989-09-01), Desanta
patent: 4889385 (1989-12-01), Chadwick et al.
patent: 4892354 (1990-01-01), Estkowski et al.
patent: 4979778 (1990-12-01), Shields

Affiliated with

Also associated with

Rating

Locking chair tilt mechanism with torsion bar does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Locking chair tilt mechanism with torsion bar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Locking chair tilt mechanism with torsion bar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1523029