Electric hoist
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 21, 2006
Grant Date -
Oct 20, 2005
app pub date -
Jun 20, 2003
filing date -
Dec 19, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention is to provide an electric hoist using a suspended electric winch that maintains a horizontal posture in any cargo handling operation. A hoist in one aspect includes a winch including a drum axially connected to a drive shaft of a motor, a suspension hook attached to the winch above the center of gravity of the winch that is in a horizontal posture thereof in and empty load state thereof, a first roller arranged on the opposite side of the winch from the suspension hook and turning the direction of a wire paid out from the drum toward the center of gravity, and a second roller for turning the direction of the wire to be aligned with a vertical line downward extended from the center of gravity of the winch. The winch is suspended in the simplest suspension method when the winch is used as a hoist. The suspension method is implemented in many plants and warehouses without any particular facility. The winch in the suspended posture thereof is balanced in a fore-after direction and a lateral direction, and continuously maintains a horizontal aligned posture during a load empty period and a load raising and lowering period.
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