Elevator drive apparatus using a traction-type speed change gear

Details Elevator drive apparatus using a traction-type speed change gear Elevator drive apparatus using a traction-type speed change gear

1982-12-06

1984-08-14

Witkowski, S. J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 20, 318 9, 318 12, 318 14, 310 80, 74640, 74750R, B66B 130

Patent

active

044651627

ABSTRACT:
A drive apparatus for elevators and the like utilizes a traction-type speed change gear to transmit power with little noise and vibrations from an electric drive motor to the drive sheave of an elevator. An abnormality detection device is provided to detect when slippage occurs in the speed change gear, and a control device activated by the abnormality detection device is provided to bring the elevator to a safe emergency stop when such slippage occurs.

REFERENCES:
patent: 2458459 (1949-01-01), Wright
patent: 3128641 (1964-04-01), Musser
patent: 3187862 (1965-06-01), Musser
patent: 3587350 (1971-06-01), Wanlass
patent: 3943780 (1976-03-01), Klaue
patent: 4044274 (1977-08-01), Ohm
patent: 4072212 (1978-02-01), Terazono et al.
patent: 4165801 (1979-08-01), Watanabe et al.
patent: 4278923 (1981-07-01), Nowak et al.
patent: 4341982 (1982-07-01), Lahti et al.
NASA Technical Paper 1378 "Performance of a Nasvytis Multiroller Traction Drive", Nov. '78, Lowenthal et al. p. 22.

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