Lifting tool for safe 105 degree rotation
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United States of America Patent
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-
Nov 27, 2001
Grant Date -
N/A
app pub date -
Dec 28, 1999
filing date -
Dec 28, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Lifting tools for safe, 105 degree, off-center rotation of large, heavy objects are disclosed. A lifting tool includes a bar that can be positioned generally parallel to a centerline of the object, and first and second clamps that are rotatably or slidably coupled to first and second ends of the bar, respectively. The clamps are adapted to secure the tool to edges of the object. The tool also includes a pivot arm that is rotatably coupled to the bar, which allows the object to be lifted, rotated up to 90 degrees, moved, and then set down. The pivot arm includes first and second chain sprockets disposed along a length thereof. A second pair of chain sprockets is coupled to the second chain sprocket via a common shaft. A pair of chain segments are attached to the pivot arm, and engage each of the second pair of chain sprockets. A first end of the pivot arm can be coupled to a hoist hook, for example, via a chain that engages the first and second chain sprockets, and is coupled to the bar at a point between the clamps.
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