Traversing hoists – Having horizontally swinging boom or bridge – And vertically swinging
Patent
1988-11-21
1991-05-28
Peters, Jr., Joseph F.
Traversing hoists
Having horizontally swinging boom or bridge
And vertically swinging
212189, 212195, 14 24, B66C 2304, B66C 2378, B66C 2372, E01D 1512
Patent
active
050186302
ABSTRACT:
A high-capacity lift assembly consisting essentially of a multipurpose platform and a pair of commercially available truck cranes or crawler cranes wherein the lifting capacity of the respective cranes is combined to create an overall assembly capable of lifting an object weighing at least double the capacity of the individual cranes. The invention further includes a drive shaft to interconnect the hoists of the respective cranes to synchronize the rotation of the hoists, a mast and boom mounting arrangement to support the loading forces with the platform and an equalizing beam to distribute the load forces equally between the two truck cranes.
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American Hoist & Derrick Company brochure, "900 Series Sky Horse Counterbalancing Crane", Form No. 900-SHG-3.
American Hoist & Derrick Company brochure, "1100 Series Super Sky Horse Machine Specifications", Form No. 1100-SSH-6.
Johnson R. B.
Peters Jr. Joseph F.
Sjoquist Paul L.
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