Reclining chair mechanism having sole support pivot

Details Reclining chair mechanism having sole support pivot Reclining chair mechanism having sole support pivot

1990-09-07

1992-04-28

Dorner, Kenneth J.

Closure fasteners

Bolts

Spring arm

297317, 297321, 297323, 297436, A47C 102, A61G 1500

Patent

active

051081482

ABSTRACT:
An essentially self-balancing reclining chair is provided. The invention may be adapted to for use by any individual, regardless of size, shape or weight. The chair has a base and two parallelogram linkages spaced apart from and facing each other in parallel vertical planes. Each parallelogram linkage has upper, lower, front and rear linkage arms pivotally connected to each other to define the parallelogram. A back support is mounted behind and between the rear linkage arms, a seat support is suspended below and between the lower linkage arms, and a leg support is suspended below and between the front linkage arms. The upper linkage arms are pivotally connected to the base, such that the chair may be balanced by positioning the pivotal connection at a position corresponding to the approximate center of gravity of the chair and an average person. The pivoting points between the back support and the seat support are aligned with the person's hip joints. The pivoting points between the seat support and the leg support are aligned with the person's knee joints. The pivoting points between the rear and upper linkage arms are at the center of a quarter circle defined by the person's center of gravity in moving from an upright to horizontal position.

REFERENCES:
patent: 27663 (1860-03-01), Woodbury
patent: 248656 (1881-10-01), Koken et al.
patent: 358326 (1887-02-01), Berninghaus
patent: 723465 (1903-03-01), Horning
patent: 1510376 (1924-09-01), Berninghaus
patent: 3727974 (1973-04-01), Swenson et al.
patent: 4877291 (1989-10-01), Taylor

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