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US 2011/0215601 A1Published application
Lifting sling with excessive elongation warning indictor
OwnerDeWayne Muellerinventor
Life of this patent
Estimating the term…
Abstract
A lifting sling having warning markings that indicate if the maximum safe load for the sling has been exceeded, whereby a visible indicator is provided to the operator at the time of overload. In an embodiment, an externally visible releasable member retained by a frangible indicator member connected to the cover of the lifting sling is released upon breaking of the frangible indicator member to provide a permanent indication of sling overload.
Claims5
A lifting sling comprising:
- a load bearing core and a cover, wherein said load bearing core and said cover elongate under load;
- a frangible indicator member affixed to a first web member and a second web member, said first and second web members being affixed to said cover, and a jacket member covering said frangible indicator member, said jacket member being affixed to said cover or one of said web members, said jacket member further comprising an opening;
- and
- a releasable member comprising an aperture, wherein said frangible indicator member passes through said aperture and at least a portion of said releasable member extends through said opening of said jacket member so as to be visible externally;
- whereby upon excessive elongation of said lifting sling, said frangible indicator member breaks and said releasable member is released from said frangible indicator member and said sling.
2 more elements
Dependencies are inferred from the claim text.