Traversing hoists – Having vertically swinging boom – Having means to swing boom vertically
Patent
1989-11-02
1991-05-21
Basinger, Sherman
Traversing hoists
Having vertically swinging boom
Having means to swing boom vertically
212183, B66C 2382
Patent
active
050167685
ABSTRACT:
A portable derrick assembly adapted for mounting on a pickup truck or a trailer, includes a base frame, a derrick tower, a tower erection subassembly, and an elongated boom pivotally mounted on the tower. A traveling sheave and cable subassembly interconnects a tail end of the boom with the tower for pivoting the boom about a pitch axis. A hoist cable is raised and lowered by a hoist traveling sheave subassembly mounted on the boom.
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Super-Master catalog sheet by Air Technical Industries.
Kennard James C.
Kennard, Jr. Dwight C.
Wick Carl J.
Basinger Sherman
Brahan Thomas J.
Kennard James C.
Kennard, Jr. David C.
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