Patient's defined-motion chair
OwnerRoger K. Leibinventor
Life of this patent
Estimating the term…
Abstract
A chair, especially suited for use by sitters lacking in normal strength, provides a lilting motion without shifting the base of the chair, and provides support and assistance to the sitter in exiting the chair. The seat and back of the chair are supported by continuously flexible members, and the back is orthopaedically designed for maintaining spinal support, even as a user of the chair moves with the motion of the chair.
Claims21
A chair capable of a lilting motion comprising a pair of spaced apart, parallel seat-supporting members and a pair of spaced apart, converging back-supporting members continuous and extending upwardly from the rear of the seat-supporting members, the seat-supporting and back-supporting members defining in elevation a seat and a back for the chair, the seat-supporting members and the back-supporting members being cantilevered rearwardly to deflect about a horizontal axis above the seat, the back-supporting members being generally S-shaped in elevation and having a lower section convex relative to the seat plane and an upper section concave relative to the seat plane, the convex section having a radius of curvature at its apex of from about 4 to about 7 inches and the concave section having a radius of curvature at its apex of from about 30 to about 50 inches, the apex of the convex section being from about 5 to about 8 inches above the seat plane and the apex of the concave section being from about 16 to about 21 inches above the seat plane, the apex of the concave section being rearward of the apex of the convex section.
A chair capable of a lilting motion comprising a pair of spaced apart, parallel seat-supporting members and a pair of spaced apart, converging back-supporting members continuous and extending upwardly from the rear of the seat-supporting members, the seat-supporting and back-supporting members defining in elevation a seat and a back for the chair, the seat-supporting members and the back-supporting members being continuously flexible and being cantilevered to deflect about a horizontal axis above the seat, the back-supporting members being generally S-shaped in elevation and comprising three sections, a first section curving upwardly and forwardly relative to the seat plane, a second section curving from the first section rearwardly and upwardly at an angle of from about 74 degrees to about 77 degrees relative to the seat plane when the chair is unoccupied, and a third section curving from the second section forwardly and upwardly at an angle of from about 72 degrees to about 77 degrees relative to the seat plane when the seat is unoccupied,
- the first and second sections joining from about 5 to about 8 inches above the seat plane in a first smooth curve having a radius of curvature of from about 4 to about 7 inches, the first curve being convex relative to the seat plane,
- the second and third sections joining from about 16 to about 21 inches above the seat plane in a second smooth curve having a radius of curvature of from about 30 to about 50 inches, the second curve being concave relative to the seat plane.
In a rocking chair comprising a base, a seat, a back, and arms above the seat and generally parallel to the plane of the seat, the improvement comprising:
- (a) the arms extending forwardly of the seat in a direction generally parallel to the plane of the seat;
- (b) a pair of substantially rigid supports extending upwardly from the base for supporting the arms, the back, and the seat, each arm being fixedly supported in front of and above the seat by a respective one of the supports to resist forward, rearward, and vertical movement of the forward portions of the arms when sitting down into and rising out of the chair, the supports alone supporting the seat, the back, and the arms;
- and
- (c) means for permitting the seat, back, and arms to rock with respect to the base.
Dependencies are inferred from the claim text.