Handling: hand and hoist-line implements – Hoist-line slings
Patent
1996-01-22
1997-07-29
Raimund, Christopher
Handling: hand and hoist-line implements
Hoist-line slings
57201, 57210, 57 3, 57 21, B66C 112
Patent
active
056515723
ABSTRACT:
Disclosed is a flexible roundsling construction which comprises a fiber optic signal strand component in a bundle of strands of endless parallel loop lifting core yarn contained inside a tubular protective cover material from which two free ends of the fiber optic strand emerge as means for providing a signal of defective continuity in the sling lifting core.
REFERENCES:
patent: 4210089 (1980-07-01), Lindahl
patent: 4850629 (1989-07-01), St. Germain
McNulty Anthony J.
Raimund Christopher
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