Chairs and seats – Movable bottom – Interconnected with back for relative concurrent movement
Patent
1989-01-30
1990-08-07
Brown, Peter R.
Chairs and seats
Movable bottom
Interconnected with back for relative concurrent movement
297330, 297DIG10, 297325, A47C 102
Patent
active
049462229
ABSTRACT:
A power-assisted lift platform for a chair includes a base, a lift frame, left and right side lift linkages and an electrically powered linear actuator connected between the base and the lift frame. The chair may be mounted to the lift frame. The lift linkages are pivotally connected at their forward ends to the base and at their rear ends to the lift frame. The lift linkages are arranged so that when the actuator is extended, the lift frame and chair are raised in a generally vertical path to reduce the fore-to-aft motion of the occupant's feet from the rest or seated position. While raising the occupant, the mechanism also tilts the occupant forwardly and transfers the occupant's center of gravity forwardly, more directly over his or her ankles to provide greater stability to the occupant in alighting from or entering the chair.
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patent: 3138402 (1964-06-01), Heyl, Jr. et al.
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patent: 3596991 (1971-08-01), Mckee
patent: 3640566 (1972-02-01), Hodge
patent: 3851917 (1974-12-01), Horstmann et al.
patent: 3881771 (1975-05-01), Amstutz
patent: 4007960 (1977-02-01), Gaffney
patent: 4637652 (1987-01-01), Bergenwall
patent: 4752100 (1988-06-01), Lemaire
Brown Peter R.
Triangle Engineering of Arkansas Inc.
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