Retaining keeper assembly for a hoisting device
AssigneeThe Crosby Group, Inc.
InventorsErnest E. Lutter, Alan C. Doughty, Paul A. Boeckman
Life of this patent
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Abstract
A retaining keeper assembly for a hoisting device. A shank has a plurality of circumferential grooves perpendicular to an axis of the shank. A thrust bearing surrounds the shank and is supported by the hoisting device. A split retaining collar having a plurality of interior circular protrusions mates with the circumferential grooves in the shank to prevent axial movement of the shank. A cylindrical retaining collar cover having a closed top and an open bottom encloses the retaining collar, the cover having an inner diameter slightly larger than an outer diameter of the retaining collar. A fastener mechanism fastens the retaining collar cover to the split retaining collar and to the shank.
Claims15
A retaining keeper assembly for a hoisting device, which assembly comprises:
- a shank having a plurality of circumferential grooves perpendicular to an axis of said shank;
- a thrust bearing surrounding said shank and supported by said hoisting device;
- a split retaining collar having a plurality of interior circular protrusions which mate with said circumferential grooves in said shank;
- a cylindrical retaining collar cover having a closed top and an open bottom, said retaining collar cover having an inner diameter slightly larger than an outer diameter of said retaining collar;
- and
- a fastener mechanism to fasten said retaining collar cover to said split retaining collar.
A method of installing a retaining keeper assembly for a hoisting device wherein such method comprises:
- installing a thrust bearing surrounding a shank supported against said hoisting device;
- installing a shank having a plurality of circumferential grooves in said hoisting device wherein said grooves are perpendicular to an axis of said shank;
- installing a split retaining collar having a plurality of interior circular protrusions around said grooves of said shank;
- sliding a cylindrical retaining collar cover over said split retaining collar and said shank;
- securing said retaining collar cover to said collar and shank;
- and
- installing a circular seal over said retaining collar cover between said cap and said device.
Dependencies are inferred from the claim text.