Crane with telescopic jibs

Details Crane with telescopic jibs Crane with telescopic jibs

1978-12-26

1981-12-01

Blix, Trygve M.

Traversing hoists

Having means facilitating assembly or disassembly

Of traversing hoist from support

52118, 212188, B66C 2342

Patent

active

043031650

ABSTRACT:
A crane comprising a ground jib, a sliding jib telescopically engaged with the ground jib and movable in a telescoping direction, and a head jib pivotally mounted to the sliding jib. A catch hook is pivotally mounted to the head jib on a pivot axis which extends in the telescoping direction of the sliding jib and a catch member is connected to the ground jib in a position to engage with the catch hook when the sliding jib is protracted into the ground jib and when the head jib is pivoted toward the ground jib. The catch member extends in the telescoping direction so that the catch hook is disengaged from the catch member when the sliding jib is extended with respect to the ground jib. A method is also disclosed for stowing the head jib of the crane.

REFERENCES:
patent: 1002259 (1911-09-01), Goedeke
patent: 1348028 (1920-07-01), Martin
patent: 3366250 (1968-01-01), Grove

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