Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1992-05-06
1993-03-16
Valenza, Joseph E.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
198322, 198326, 198835, B66B 908
Patent
active
051936500
ABSTRACT:
A portable stair lift system, for assistance in traversing short or medium length stairways, employs a pair of spaced elongated solid metal plates extending the stairway length and supported by a pair of vertically extending end brackets attached to a block of wood at each end thereof. An axle extends through each pair of end brackets and each axle supports a roller transversely disposed at the metal plate ends. At least one of these rollers is provided with a sprocket wheel secured to the axle between split roller segments. A reversible drive gear motor, drive chain connected to the sprocket wheel, drives the roller. A heavy duty conveyor belt is positioned about the pair of rollers. A passenger support system (either a chair seat or step segments) is secured to and movable with the conveyor belt. Manual switch means for controlling motor operation and direction are provided and actuatable by the passenger at any point along the stairway. Automatic cut-off switches stop the stair lift at either end of the inclined stairway. In a modified embodiment, (FIG. 9) dual drive chains are provided for use with long stairways.
REFERENCES:
patent: 966394 (1910-08-01), Gavryloff
patent: 1768650 (1930-07-01), Wood
patent: 1838204 (1931-12-01), Wood
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patent: 1933131 (1933-10-01), Wood
patent: 2563260 (1951-08-01), Miller
patent: 3422947 (1969-01-01), Kraft et al.
patent: 3500963 (1970-03-01), Beutler
patent: 4043427 (1977-08-01), Ackerman
patent: 4564086 (1986-06-01), Kingston
patent: 5125481 (1992-06-01), Shibata
Nelson Wallace J.
Reichard Dean A.
Valenza Joseph E.
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