Protective coated wire rope sling and method for making same

Details Protective coated wire rope sling and method for making same Protective coated wire rope sling and method for making same

1978-01-23

1979-10-23

Marbert, James B.

Handling: hand and hoist-line implements

Hoist-line slings

A44B 3100

Patent

active

041718402

ABSTRACT:
A wire rope sling having a coating for protecting material lifted thereby, and having eyes at both ends for engaging a crane hook. The coating is a flexible, abrasion resisting plastic, such as urethane, positioned on a substantial part of the sling intermediate the eyes. The coating is fixed to the wire rope and thick enough to withstand the maximum load of the wire rope.
The method of applying a plastic coating to a wire rope sling including hanging the wire rope vertically, placing a tube over a portion of the sling to be coated, closing the lower end of the tube with a cylindrical block having a bore therethrough to receive the wire rope and having a conical recess at its upper end to form a taper at the lower end of the coating on the wire rope, securing the tube and block on the wire rope, filling the tube from its upper end with the liquid plastic coating, inserting two semicylindrical blocks into the upper end of the tube, said upper blocks having diametrical contacting faces and a central bore formed in said faces to fit around the rope adjacent the upper end of the tube. The upper blocks having flanges around their upper ends to fit over the tube, and together at their lower ends form a downwardly opening conical recess to form a taper at the upper end of the coating. The plastic coating is embedded into outer rope surfaces and cured by heating.

REFERENCES:
patent: 3394455 (1968-07-01), Grimmer
patent: 3512223 (1970-05-01), Willinger
patent: 3718945 (1973-03-01), DE Troglede

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