Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Cable and hook tackle
Patent
1987-08-03
1989-05-23
Cherry, Johnny D.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Cable and hook tackle
B66C 112
Patent
active
048323926
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to tackle acting as an adjustable sling connected between a conventional hoist and a load to be lifted and allowing the load to be tilted and maintained in the tilted position.
BACKGROUND ART
When lifting a load with a hoist and a sling, it is sometimes desirable or required to tilt the load, such as when removing or installing the engine of a vehicle, which can require changing the attachment of the hoist to the sling.
Ehrhardt U.S. Pat. No. 3,391,957, issued July 9, 1968, discloses a "Universal Hoisting Fixture" in which the central portion of a single sling line is wound on a drum and the free ends of the line are connected to the load to be lifted. The drum can be turned for tilting the load. Prior to lifting the load the loose coils of sling line may become crossed or bind against each other on the frame supporting the drum making it difficult to rotate the drum. In addition, as the drum is rotated the coils of sling line have a tendency to progress toward a side of the frame and can exert substantial side pressure on the frame. Further, only the weight of the load tightening the coils on the drum deters the line from slipping relative to the drum, and in an extreme tilted position the load can slip toward a more horizontal position.
Other types of hoist tackle in which a sling line is wound on a drum are shown in: Caldwell U.S. Pat. No. 2,356,147, issued Aug. 22, 1944, Pridy U.S. Pat. No. 2,617,677, issued Nov. 11, 1952, Morith U.S. Pat. No. 2,620,218, issued Dec. 2, 1952, Young U.S. Pat. No. 3,254,913, issued June 7, 1966, Tattoo et al. GB patent No. 1,576,311, published Oct. 8, 1980, and Khark SU patent No. 1096187, issued June 7, 1984.
DISCLOSURE OF THE INVENTION
The tilting hoist tackle in accordance with the present invention includes a drum rotatably mounted in a block adapted to be connected to a conventional hoist and, preferably, two separate sling lines each with one end portion fitted through a slot in the drum and knobbed to secure such line end portion to the drum. The sling lines are wound in opposite senses around the drum and their free end portions are adapted to be connected at spaced locations to the load to be lifted Mechanism is provided for locking the drum relative to its block and, with the locking mechanism released, the drum can be rotated to haul in one sling line while paying out the other so as to tilt the load, whereupon the locking mechanism can be actuated to maintain the load in its tilted position One or more guide plates are provided to prevent the coils of sling lines from crossing or riding up on each other. The tackle is of simple and inexpensive construction, in compact form and easy to use, yet rugged and reliable for repeated use over a long period.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top perspective of tilting hoist tackle in accordance with the present invention with some parts shown in exploded relationship and some parts deleted;
FIG. 2 is a somewhat diagrammatic side elevation of the tilting hoist tackle of FIG. 1 in assembled condition, and FIG. 3 is a somewhat diagrammatic end elevation thereof with parts broken away;
FIG. 4 is an enlarged, fragmentary, vertical, transverse section of the tilting hoist tackle of FIGS. 1, 2 and 3,.a d FIG. 5 is a further enlarged fragmentary, vertical transverse section thereof;
FIG. 6 is an enlarged fragmentary end elevation of the tilting hoist tackle of FIGS. 1, 2 and 3 with parts broken away, and FIG. 7 is a horizontal section along line 7--7 of FIG. 6;
FIG. 8 is a top perspective of a second form of tilting hoist tackle in accordance with the present invention with some parts shown in exploded relationship and some parts deleted;
FIG. 9 is a somewhat diagrammatic side elevation of the tilting hoist tackle of FIG. 8 in assembled condition, and FIG. 10 is a somewhat diagrammatic end elevation thereof with parts broken away;
FIG. 11 is an enlarged, fragmentary, vertical, transverse section of the tilting hoist tackle of FIGS. 8, 9 and 10. and FIG. 12 is an enla
REFERENCES:
patent: 2053976 (1936-09-01), Stahl
patent: 2329943 (1943-09-01), Robins
patent: 2356147 (1944-08-01), Caldwell
patent: 2617677 (1952-11-01), Pridy
patent: 2620218 (1952-12-01), Morith
patent: 2629625 (1953-02-01), Phillips
patent: 3254913 (1966-06-01), Young
patent: 3391957 (1968-07-01), Ehrhardt
patent: 3663051 (1972-05-01), Yu
patent: 4684162 (1987-08-01), Butler
Beach Robert W.
Brown Ward
Cherry Johnny D.
Oberg Enterprises, Inc.
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