Device for mounting and dismounting chain blocks
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 27, 1984
Grant Date -
N/A
app pub date -
Dec 3, 1981
filing date -
Dec 3, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A U-shaped suspension ring is pivotally supported on a horizontal pin inserted through a suspension shaft supported by the top plate of a load suspending tripod or by a support member disposed at a high place. In order to lift a chain block to the position of the suspension ring, a rope passed around the hook of the chain block is divided into a hook lifting rope portion extending around the opposite ends of the horizontal pin and tension rope portions to be pulled from the ground. As a result of this arrangement, the hook can be brought into engagement with the suspension ring in such a manner that the opening in the hook of the chain caught by the lifting rope portion remains unchanged in direction with respect to the suspension ring; on the other hand, the suspension ring can be disengaged from the hook by an operation on the tension rope portions, which operation causes the guide between the arm portions of the suspension ring to change the angle of the suspension ring around the axis of the horizontal pin.
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