Power operated chair lift mechanism

Details Power operated chair lift mechanism Power operated chair lift mechanism

1982-08-16

1984-05-15

Foss, J. Franklin

Supports

Stand

Adjustable vertically

2482811, 297347, F16M 1300

Patent

active

044483821

ABSTRACT:
A power operated chair lift mechanism including long links pivotally connected at one end to a horizontally movable follower block and pivotally connected at the other end to a vertically movable chair support, and short links pivotally connected at one end intermediate the ends of the long links and at the other end to the base to form an isosceles linkage for raising and lowering the chair in response to horizontal movement of the follower block. Auxiliary links are connected to a second follower block and to vertical guideways in the chair support and are pivotally connected intermediate their ends to the short links to provide a second isosceles linkage for maintaining the chair support in a fixed attitude during raising and lowering of the chair. The chair can be rotated about an upright axis in all vertically adjusted positions.

REFERENCES:
patent: 2156148 (1939-04-01), Giacomo et al.
patent: 2766007 (1956-10-01), Krilanovich
patent: 3479086 (1969-11-01), Sheridan
patent: 3554598 (1971-01-01), Dunkin
patent: 3698673 (1972-10-01), Olsen
patent: 4173372 (1973-11-01), Norris

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