Hydraulic elevator
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United States of America Patent
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-
Dec 29, 1987
Grant Date -
N/A
app pub date -
Nov 7, 1986
filing date -
Nov 25, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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