Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1978-04-28
1979-12-18
Song, Robert R.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 17, 187 89, B66B 908
Patent
active
041790120
ABSTRACT:
A stairway lift for use by an invalid or handicapped person has at the upper end of the stairs a drive sprocket, at the lower end of the stairs an idler sprocket, and a pair of tubular guides between the sprockets. An endless conveyor element in the form of a cable provided with a succession of closely spaced balls is displaceable within this guide and is connected to a carriage so that rotation of the drive sprocket can move this carriage up or down along the stairway. The idler sprocket is permanently connected to a centrifugal brake that stops displacement of the conveyor element whenever its speeds exceeds a predetermined maximum safe level. Furthermore the cable and the balls are relatively dimensioned so that the cable can transmit compressive forces to the idler sprocket and the brake in the event of cable rupture immediately above the carriage.
REFERENCES:
patent: 1237627 (1917-08-01), Forbes
patent: 1873807 (1932-08-01), Baldwin
patent: 3968861 (1976-07-01), Kernen
patent: 4046226 (1977-09-01), Flinchbaugh
Rigert Maschinenbau AG
Ross Karl F.
Song Robert R.
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