Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means – Monitors operational parameter
Reexamination Certificate
2004-09-09
2009-12-29
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With monitoring, signalling, and indicating means
Monitors operational parameter
Reexamination Certificate
active
07637357
ABSTRACT:
In an elevator apparatus, a main rope suspending a car and a balance weight is looped around a traction sheave and a driven sheave of a traction machine. A driving-side speed detecting portion for detecting rotational speed of the traction sheave and a driven-side speed detecting portion for detecting rotational speed of the driven sheave are electrically connected to an operation control device. The operation control device includes a determination portion determining presence or absence of an abnormality in an elevator by calculating speed difference between rotational speeds of the traction sheave and comparing the speed difference to a fixed reference value, set in advance, and a control portion for controlling the operation of the elevator based on information from the determination portion.
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Ando Eiji
Hayashi Yoshikatsu
Matsukawa Koei
Mitsui Atsushi
Nakagawa Hiroyuki
Leydig , Voit & Mayer, Ltd.
Mitsubishi Electric Corporation
Salata Jonathan
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