Traversing hoists – Having vertically swinging boom – Protruding laterally from vehicle
Patent
1993-02-22
1994-07-26
Huppert, Michael S.
Traversing hoists
Having vertically swinging boom
Protruding laterally from vehicle
212151, 212163, B66C 1342
Patent
active
053321103
ABSTRACT:
A tractor having a pair of endless, segmented, high drive tracks includes a side boom and a side-mounted counterweight. Boom angle is controlled by a boom winch with a load winch provided for lifting a load. Both winches are hydraulically driven and provide positive drive in raising and lowering. A boom automatic stop arrangement detects full-up boom position and actuates a release valve for dumping hydraulic pressure and preventing further retraction of the boom. The counterweight is pivotally coupled to the tractor by means of a support frame which provides for outward and upward as well as downward and inward displacement of the counterweight over an arc-like path to compensate for boom inclination and the weight of a load.
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Brahan Thomas J.
Huppert Michael S.
Vanguard Hydraulic Pipelayer
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