Traversing hoists – With haul-in line
Patent
1976-11-15
1978-05-30
Oresky, Lawrence J.
Traversing hoists
With haul-in line
212 8R, 212 55, 212 59R, B66C 2362
Patent
active
040919366
ABSTRACT:
The overall length of boom assembly can be increased by the use of a pair of boom extension sections. When the boom extension sections are not required, they are supported at storage locations adjacent to one side of a main boom assembly. When the overall length of the main boom assembly is to be increased, a first one of the boom extension sections is pivotally connected with the outer end portion of the main boom assembly and the second boom extension section is pivotally connected with the outer end portion of the first boom extension section. The two boom extension sections are swung outwardly together. After the first boom extension section has been firmly connected with the outer end portion of the main boom assembly, the second boom extension section is pivoted about the outer end portion of the first boom extension section. In order to guide movement of the second boom extension section from its storage position into engagement with the first boom extension section, a roller on the second boom extension section rolls along a track which is connected with the main boom assembly. As the second boom extension section is moved into engagement with the first boom extension section, the roller moves off the track to thereby release the second boom extension section.
REFERENCES:
patent: 3366250 (1968-01-01), Grove
patent: 3785505 (1974-01-01), Keller, Jr.
patent: 3831771 (1974-08-01), Wiencek
patent: 3944082 (1976-03-01), Fritsch
patent: 3968884 (1976-07-01), Johnson et al.
Lorain, "Moto-Crane", MC-35H, Specifications by Koehring Lorain Division, 5/1975.
Spence Charles R.
Wuerflein James G.
Oresky Lawrence J.
The Warner & Swasey Company
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