Restraint device for traction sheaves
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United States of America Patent
Stats
-
Nov 27, 2012
Grant Date -
Apr 16, 2009
app pub date -
Oct 12, 2007
filing date -
Oct 12, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A restraint device is disclosed that limits the movement of the cable or rope relative to the traction, thus reducing or eliminating the popping noise associated with the cable or rope snapping back against the traction sheave. In one embodiment, the restraint device comprises a molded component that is fitted to encompass the region of the sheave where separation of the wire rope from the sheave is most likely to occur. The restraint device may be mounted so that it is removable and replaceable with minimal dismantling of the hoist containing the sheave. The restraint device may be reversible so that one restraint device may by used for at least two cycles before being replaced. Indication of the need for replacement may be provided by including a second color material at the depth where wear reaches the allowable limit, thereby providing a visual signal to initiate replacement as seen during service.
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