Chairs and seats – Movable bottom – Tiltable
Patent
1989-05-02
1991-04-23
Chen, Jose V.
Chairs and seats
Movable bottom
Tiltable
297342, 297301, A47C 102
Patent
active
050094661
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF INVENTION
This invention relates to reclining chairs by which is meant chairs in which the user can tilt backwards as is common in office or so-called judge's chairs. In this regard, the word "reclining" is used to mean tilting of the seat and or arms of a chair in the direction of the user's back. A wide variety of reclining chairs have been known for many years for instance the chairs shown in the following patents which were found in a search of Class 297, Subclasses 68, 78, 79, 80, 281, 282, 312, and 354 after the chair of this invention was designed: U.S. Pat. Nos. 14,890; 2,517,278; 2,609,432; 3,711,152; 4,040,660; 4,341,420, and 4,536,029 and the following patents cited in the parent application identified above: U.S. Pat. Nos. 4,744,600; 4,732,424; 4,653,806; 4,641,885; 4,032,190; 3,778,104; 142,145; 790,242; 2,532,025; 2,586,951; 2,617471; 3,446,532; 3,712,666; 3,741,607; 4,570,994; Germany Pat. No. 3,322,450; and France Pat. No. 2,584,587.
The known reclining chairs provide a variety of forms of control for the reclining motion and a variety of levels of comfort during reclining and in the various reclined positions, but each of these known designs has its own disadvantages.
SUMMARY OF INVENTION
In accordance with this invention, I have developed a design for reclining chairs providing a new level of comfort and control of the reclining motions of the chair, and these new levels of comfort and control can be achieved with simple and economical structure using to a great extent simple pivot joints. In this regard, it is intended that the word "pivot" is used in its broadest sense including pin and socket joints and also various flexures and rolling joints with which pivotal movement may be accompanied by translation.
The new reclining chair of this invention includes several new aspects which may be used together to produce cooperative functions.
In one new aspect of this invention the chair includes a seat having a bottom portion adapted to engage and support the user's seat and an upstanding low-back portion extending approximately at right angles to the seat (between about seventy and one hundred and ten degrees) approximately six inches (between about five and seven inches) above the bottom portion and adapted to engage and support the user's low-back. A back is pivotally connected to the top of the low-back portion of the seat adapted to engage and support the user's upper back. Means support the seat and back for reclining whereby when the chair is reclined the pivotal movement between the back and seat is located adjacent to the low-back of the user instead of the user's seat and pressure on the user's low back is increased.
In the broadest sense of this invention, this arrangement of a reclining seat with an upstanding low back portion and a reclining back above the low back portion of the seat provides important low back support in place of slouching. This arrangement can be used with conventional mechanisms that support the seat from below, but in the preferred structure of the chair, the seat is suspended from above, by pivotal suspension of chair arms, so that the low back pressure is applied by levers which distribute proportions of the user's weight.
In another aspect of the invention the chair includes: a frame for supporting the chair on a floor, a seat having a front and a back adapted to support a user, an arm pivotally supported on the frame above the seat and pivotally coupled to the front and back of the seat to suspend the seat from the frame for reclining. A back panel is adapted to engage the user's back and forms a first control lever which comprised the coupling between the arm and the back of the seat with the first lever pivoted near its lower end to the seat and pivoted intermediate of its ends for moving the seat horizontally with respect to the arm responsive to pressure on the first lever by the user's back. A thigh support adapted to engage the user's upper legs forms a second control lever which comprised the coupling between the arm and the fron
REFERENCES:
patent: 1191438 (1916-07-01), Kilburn
patent: 2586951 (1952-02-01), Johnson
patent: 2617471 (1952-11-01), Lorenz
patent: 3482874 (1969-12-01), Henebry et al.
patent: 3712666 (1973-01-01), Stoll
patent: 4711491 (1987-12-01), Ginat
patent: 4840426 (1989-06-01), Vogtherr et al.
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