Traversing hoists – Overhead – Cable
Patent
1976-02-13
1977-10-11
Oresky, Lawrence J.
Traversing hoists
Overhead
Cable
212 46A, 212 58R, B66C 2336
Patent
active
040530604
ABSTRACT:
A mobile rotary crane that can easily be moved on site while assembled, transported on the highway when disassembled, and lift large loads with a full range of movement. A vehicular support supports a crane base for rotary movement with respect thereto, the vehicular support having a pair of end sections with multiple axle wheel trains pivotally mounted with respect thereto. A center section of the vehicular support includes outrigger means for providing a wide base of support during lifting with the crane. A main boom section is pivotally mounted to the crane base, and lever arms disposed at right angles with respect to the main boom and mounted on a common center therewith provide for lifting of the main boom from a generally horizontal position, whereat any number of sections comprising the main boom may be attached together, to its generally vertical operating position. A jib boom is pivotally mounted on the load side of the main boom, and counterweight is disposed on the crane base on the opposite side of the main boom as the jib boom. A tower that is at least 1/3 the length of the jib boom, extends from the main boom, and provides support for the cable assembly for pivoting the jib boom with respect to the main boom. A reeving assembly extends on the load side of the tower, associated with cable extending between the tower and the jib boom, and a strongback assembly is provided on the counterweight side of the main boom.
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patent: 3734302 (1973-05-01), Durand
patent: 3767061 (1973-10-01), Tax et al.
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