Fiber sling and method for evaluating its performance
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United States of America Patent
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Mar 23, 2010
Grant Date -
Mar 13, 2008
app pub date -
Oct 28, 2005
filing date -
Nov 2, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An object of the present invention is to enable easy and sure evaluation of practical performance of a fiber sling without taking troublesome labor such as to decompose it. As a means of achieving this object, a fiber sling according to the present invention is a fiber sling S such that: a strand 20 having a load capacity is circulated in a plurality of rows to thus form an annulus wherein the annulus is contained in a protective bag 10 having a hollow annular shape, which fiber sling S comprises: detection wires 30 each having electroconductivity and disposed in the lengthwise of the strand 20, the number of the detection wires 30 being plural and less than the total number of the rows of the strand 20; sheaths 40 covering the outer circumference of the detection wires 30; and a pair of detection terminals 32 and 32 connected electrically with the opposite ends of the plural number of detection wires 30 and exposed to the outer surface of the annular protective bag 10.
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