Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means – Monitors operational parameter
Reexamination Certificate
2005-09-30
2010-11-02
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With monitoring, signalling, and indicating means
Monitors operational parameter
C187S281000
Reexamination Certificate
active
07823705
ABSTRACT:
An elevator apparatus is equipped with an elevator component that is operated during operation of an elevator, a detector for measuring a change in a physical quantity other than temperature as to the elevator component, and a control device for controlling the operation of the elevator based on information from the detector. The elevator component is, for example, a hoisting machine for moving a car of the elevator. The hoisting machine has a motor, and a driving sheave that is rotated by the motor. The detector measures a strain of a frame of the motor as the physical quantity other than temperature. The control device determines based on the strain of the frame of the motor whether or not there is an abnormality in the operation of the elevator, and controls the operation of the elevator. It is therefore possible to determine easily and more reliably whether or not there is an abnormality in the operation of the elevator, without the need to directly measure the temperature of the motor (6).
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Sakai Masaya
Ueda Takaharu
Yumura Takashi
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Salata Jonathan
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