Lifting hook

Details Lifting hook Lifting hook

1984-06-22

1986-02-04

Marbert, James B.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Resilient suspension means

294 8219, B66C 1134

Patent

active

045681180

ABSTRACT:
The present invention mainly relates to improvements in the head construction of a lifting hook, wherein the hook head has an annular recess over its certain axial length, the upper portion of said recess forming a double curvature profile, and the surface of said recess being pressurized by a rolling roller to develop a compressive residual stress. An external half sleeve is fitted on said annular recess and seated on a thrust bearing, the sleeve being surrounded with a collar nut.

REFERENCES:
patent: 3230004 (1966-01-01), Lock
patent: 3250563 (1966-05-01), Walsh

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