Chair

Details Chair Chair

1980-09-29

1983-01-25

Zugel, Francis K.

Chairs and seats

Legrest or footrest interconnected to move relative to...

297 83, 297319, 297433, A47C 1034

Patent

active

043699979

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a chair with elevated seat surface, having a seat mounted on a vertically adjustable column and a backrest, which seat and backrest are displaceable around horizontal transverse axes, and having a displaceable footrest.
Such chairs can be used in particular as work chairs at high work places. Generally they have an ordinary adjustment mechanism which permits a limited swinging motion of seat and/or backrest around horizontal transverse axes. For example, the seat is adjustable at most between a substantially horizontal position and a slightly rearward inclined position.
In addition to this a chair is known from U.S. Pat. No. 2,858,876 in which the footrest is fastened directly. to the seat and can be swung with the latter. The chair of this U.S. patent permits its use as so-called standing support or standing aid, against which a person can rest upon work which is carried out in a standing position.
The object of the invention is to develop a chair of the aforementioned type in such a manner that the seat, the footrest and the backrest are swingable synchronously with each other in an ergonomically favorable manner between different positions suitable for sitting and a standing-support position.
This object is achieved in accordance with the invention in a chair of the aforementioned type by a yoke which is swingable around a horizontal transverse axis and to the upper end of which the backrest is swingably connected while its lower end is developed as footrest.
The seat is preferably also connected with the middle region of the yoke. Such a chair permits simultaneous displacement of seat, backrest and footrest by means of a single manipulation.
The seat, the backrest and/or the footrest can be connected with the yoke via adjustment devices which permit an additional, separate adjustment movement of these parts. Such separate adjustment movements can also be made possible in the manner that the yoke is developed in two or more parts and is provided in the regions of connection of the individual sections with adjustment devices which permit mutual displacement of the sections of the yoke.
For ergonomic reasons it may be advantageous to impart the seat a smaller swinging motion than the backrest and footrest upon conversion of the chair from a sitting position into the standing-support position. For this purpose, the seat can, for instance, be swingably supported in its front region in a horizontal transverse axis on a forward extending extension arm of the column and be connected with the yoke in the rearward region in a horizontal link which permits parallel displacement with respect to the seat and/or the yoke so that the seat does not participate in the full swinging motion of the yoke upon the swinging of the latter.
The aforementioned link on the rear bottom side of the seat, which link is displaceable with respect to the seat and/or the yoke can preferably be formed by a hydraulic cylinder, force accumulator, detent mechanism or the like which is arranged below the seat and the extendable piston rod of which points rearward and is connected at its free end with a link which is arranged fixed on the yoke. By such an adjustment mechanism the movements of seat, foot-rest and yoke can be locked and unlocked by a single manipulation. This solution can also be used for ordinary chair mechanisms and therefore with chairs without footrest. It offers the advantage that the locking mechanism or force accumulator can be arranged flat below the seat and thus does not interfere with the covering of the seat from below, and it furthermore permits, as will be explained in further detail, complete relief of the locking mechanism from bending forces.
The yoke can, for instance, extend upwards from the footrest and then along below the seat and upwards along the rear of the seat to the backrest, but it may also have some other shape. Several embodiments of the invention will be explained in further detail below with reference to the accompanying drawing in which
FIGS. 1 to 3 show diagrammatic

REFERENCES:
patent: 9128 (1852-07-01), Bass
patent: 186870 (1877-01-01), Patch
patent: 2471024 (1949-05-01), Cramer
patent: 2858876 (0000-01-01), Woodson, Jr.
patent: 2919746 (1960-01-01), Fidel
patent: 3005660 (1961-10-01), Winick

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1621189