Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1986-09-03
1988-05-10
Rolla, Joseph J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
74 8915, 74665D, B66B 1104
Patent
active
047428910
ABSTRACT:
A compact and simple elevator system is disclosed which does not require a counterweight, a hoistway rope, a winding drum, safety devices such as an emergency stopping device, a speed governor or the like, and in which the installation space as well as the production costs thereof can be reduced, and which is most suitable for installation in private homes. The elevator system comprises a hoistway, an elevator car accommodated in the hoistway and movable in the vertical direction, a screw shaft vertically disposed in the hoistway and having a screw thread formed on the outer peripheral surface thereof, a rotary element mounted on the elevator car and adapted to be threadedly engaged with the screw shaft, a drive source mounted on the elevator car for driving the rotary element to rotate, and a mechanism for restraining the rotation of the screw shaft at least in the normal operating condition of the elevator system, whereby when the rotary element is driven to rotate by means of the drive source, it is caused to displace vertically along the screw shaft to thereby move the elevator car in the vertical direction.
REFERENCES:
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patent: 2873620 (1959-02-01), Sinclair
patent: 3215227 (1965-11-01), MacChesney
patent: 3548677 (1970-12-01), Becker
patent: 4494025 (1985-01-01), Fickler
patent: 4548298 (1985-10-01), Born
Hirabayashi Terumi
Kunii Kazushi
Mitsubishi Denki & Kabushiki Kaisha
Noland Kenneth
Rolla Joseph J.
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