Lifting sling with excessive elongation warning indicator
OwnerDeWayne Muellerinventor
Life of this patent
Estimating the term…
Abstract
A lifting sling having warning markings that indicate the extent of elongation of the sling under load, whereby an operator can visually determine if the maximum safe load weight of the sling has been exceeded. The markings are disposed on the surface of the sling cover and initially covered by a non-elongating body, but are exposed as the sling elongates under load.
Claims18
A lifting sling comprising a load bearing core, a cover and excessive elongation warning indicator means, wherein said load bearing core and said cover elongate under load;
- said excessive elongation warning indicator means comprising a non-elongating body attached to said cover, wherein said non-elongating body is non-load bearing and comprises an extended portion of said cover, and warning markings disposed on said cover, said non-elongating body further comprising demarcation means to indicate in combination with said warning markings the extent of elongation of said sling.
A lifting sling comprising a dynamic load bearing core, a dynamic cover and excessive elongation warning indicator means;
- said excessive elongation warning indicator means comprising a static non-elongating body attached to said cover, wherein said non-elongating body is non-load bearing and comprises an extended portion of said dynamic cover, and warning markings disposed on said cover, said static non-elongating body further comprising demarcation means to indicate in combination with said warning markings the extent of elongation of said sling.
A lifting sling comprising a dynamic load bearing core, a dynamic cover and excessive elongation warning indicator means, wherein said dynamic load bearing core and said dynamic cover elongate under load, said sling having a load rating for the maximum load to be lifted by said sling;
- said excessive elongation warning indicator means comprising a static non-elongating body attached to said dynamic cover, wherein said static non-elongating body is non-load bearing, and warning markings disposed on said cover, said static non-elongating body further comprising demarcation means to indicate in combination with said warning markings the extent of elongation of said sling, wherein at least some of said warning markings are covered by said static non-elongating body when the load being lifted by said sling does not exceed said load rating.
Dependencies are inferred from the claim text.