Lifting apparatus including overload sensing device
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United States of America Patent
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Sep 2, 1997
Issued Date -
N/A
app pub date -
May 13, 1996
filing date -
Feb 16, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A load lifting apparatus comprising: a frame; a load engaging mechanism for engaging a load having a weight; a hoist mechanism for raising the load engaging mechanism, the hoist mechanism being mounted on the frame and including a member supporting the load engaging mechanism during lifting of the load, the member having therein an aperture; a sensor disposed in the aperture for detecting a force exerted by the load engaging mechanism on the member, the sensor providing a variable output indicative of the magnitude of the force; and a control for disabling the hoist mechanism when the output reaches a first predetermined value corresponding to the maximum load of the load lifting apparatus.
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