The Crosby Group, Inc.

Paul A Boeckman

Roger E Beall

Ernest E Lutter

Alan C Doughty

Larry L Postelwait

Charles R Garrett

Chris Whitehead

Larry Postelwait

A thimble mechanism for retention of a shackle in a wire rope loop termination. In one preferred embodiment, a thimble device is provided for a shackle having a pair of opposed legs with each leg having an end with a width smaller than a depth. The thimble device includes a thimble body having an external arcuate edge with a rope groove for receipt of a wire rope therein. A central opening extends through the thimble body with the central opening larger than the width but smaller than the depth of the shackle ends. A keyway is provided in the thimble body extending from the central opening to the arcuate edge of the thimble body.

Thimble mechanism for retention of a shackle in a wire loop termination

A securing mechanism for a shackle having a pair of opposed legs with an opening at one end of each of the pair of opposed legs to form a pair of opposed openings. The securing mechanism includes a shackle bolt having a head at one end and a circumferential groove near an opposed end wherein the shackle bolt is received through the pair of opposed openings in the shackle. A two piece hinged clamp assembly is received in the circumferential groove in order to retain the shackle bolt in the shackle. A retainer pin is received in an opening in the two piece clamp assembly to hold the two piece clamp assembly in a closed position. A retainer clip surrounds the retainer pin. A lock pin through the two piece clamp assembly retains the retainer pin in the two piece clamp.

Securing mechanism for shackle

Flexible RFID housing

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 keeper ring having an open top and an open bottom encloses the assembled retaining collar, the keeper ring having an inner diameter slightly larger than an outer diameter of the retaining collar. A pair of retaining rings surround the split retaining collar above and below the keeper ring to trap the keeper ring in place.

Retaining keeper assembly for a hoisting device

A field adjustable block for use with a bridge crane having a rotating cylindrical drum for rope. The block includes a cylindrical center pin having a key way recess parallel to an axis of the center pin. An inner side plate has an opening therethrough and an extending key receivable in the key way recess to prevent rotation of the inner side plate. Multiple sheaves are receivable over the center pin. At least one toroidal spacer is receivable over the center pin. A lock washer has an inwardly extending key receivable in the key way recess of the center pin and has a plurality of radially extending tabs. A nut has at least one notch to receive one of the extending tabs therein. An outer side plate is removably attached to the inner side plate by fasteners.

Field adjustable bridge crane block

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.

Growing community of inventors

Tulsa, OK, United States of America

Paul A Boeckman