Load leveling sling rigging apparatus

Details Load leveling sling rigging apparatus Load leveling sling rigging apparatus

1997-05-09

1998-11-17

Kramer, Dean

Handling: hand and hoist-line implements

Hoist-line slings

294 8212, B66C 112

Patent

active

058366318

ABSTRACT:
An apparatus and method for rigging a sling between a load to be lifted and a lifting machine such as a crane. The sling rigging apparatus includes first and second plates which have a plurality of aligned apertures. A shaft is fixed between the plates and is attachable to a crane hook to allow the rigging apparatus to be raised. A plurality of sling engageable pins are insertable in a longitudinal direction through the aligned apertures to positions spanning a space between the plates. When inserted through the apertures, the pins are spaced from each other in a direction transverse to the longitudinal direction and arranged to define a multi-curved pathway. A sling positioned along this pathway contacts parts of the exterior peripheries of the plurality of pins, and when a load is applied on the sling, this contact with the pins causes the sling to be frictionally locked within the rigging apparatus.

REFERENCES:
patent: 3602544 (1971-08-01), Marsh
patent: 3709548 (1973-01-01), Hogshead
patent: 4525007 (1985-06-01), Chapalain
patent: 4762355 (1988-08-01), Hogg
patent: 4850629 (1989-07-01), St. Germain
patent: 5058243 (1991-10-01), Rasmussen
Product brochure entitled "Rigging Attachments-Catalog RA-1" by The Caldwell Company, Inc. of Rockford, IL, 1992, and especially pp. 4 and 5.
Product brochure entitled "Slingmax Rigging Products #9511," by Slingmax Rigging Products of Aston, PA, 1995, and especially p. 11.

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