Hydraulic elevator

Details Hydraulic elevator Hydraulic elevator

1986-11-07

1987-12-29

Miller, Charles D.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187134, B66B 126

Patent

active

047154780

ABSTRACT:
The velocity of a cage during a time interval from the start of deceleration to the stoppage of the cage is controlled by utilizing a velocity characteristic which changes depending upon the load condition or oil temperature of a hydraulic elevator, that is, a magnitude by which the velocity characteristic during the acceleration of the cage differs from a reference running characteristic. Thus, even when the load state or the oil temperature has changed, the operating period of time of the hydraulic elevator is shortened, so that a comfortable ride, energy saving, cost reduction etc. are attained.

REFERENCES:
patent: 4009766 (1977-03-01), Satoh
patent: 4434874 (1984-03-01), Caputo
patent: 4440266 (1984-04-01), Kohler
patent: 4593792 (1986-06-01), Yamamoto

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