Traversing hoists – With haul-in line
Patent
1974-11-27
1977-01-18
Spar, Robert J.
Traversing hoists
With haul-in line
52116, 52716, B66C 2362
Patent
active
040034755
ABSTRACT:
A lifting crane has a boom of box lattice type construction, and a steel wire rope hoist line extending adjacent to the boom is alternately slackened and tensioned during a cyclical work period as to slap, pound or rub against some of the lattice members. This makes such lattice members vulnerable to damage by contact with the hoist line and subjects the hoist line to abrasive wear by contact with the lattice members. An elongate, rigid connector extends longitudinally of a lattice member vulnerable to damage by hoist line contact and defines a mounting base receiving slot therein. A strip of expendable material softer than the hoist line has a mounting base portion shaped to fit within the slot in the connector for securing the strip thereto and has an enlarged head portion that is positioned between the connector and the hoist line when the strip is secured to the connector to form a shock absorbing cushion that is non-abrasive to the hoist line.
REFERENCES:
patent: 1620933 (1927-03-01), Wilcox
patent: 2461082 (1949-02-01), Purnell
patent: 3290082 (1966-12-01), Fritsch
patent: 3323660 (1967-06-01), Allin
patent: 3388523 (1968-06-01), Evans
patent: 3430778 (1969-03-01), Brown
patent: 3606432 (1971-09-01), Honatzis
patent: 3842564 (1974-10-01), Brown
Edwards J. W.
FMC Corporation
Johnson R. B.
Spar Robert J.
Tripp C. E.
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