Crane with a pivotal assembly for detachably connecting and supp

Details Crane with a pivotal assembly for detachably connecting and supp Crane with a pivotal assembly for detachably connecting and supp

1975-10-24

1978-05-30

Hoffman, Drayton E.

Traversing hoists

With haul-in line

212 55, 212 70, 242 684, B66C 2362

Patent

active

040919358

ABSTRACT:
To facilitate transferring a massive boom assembly from a regular crane carrier vehicle to an independent transport trailer, retractable pivot pins and power means to actuate the same are provided on the boom support frame of the crane turntable. The pivot pins, when in their active positions, project through main journals on the crane boom suspension structure. Safety locking elements prevent accidental retraction of the pivot pins during normal operation of the boom on the regular carrier vehicle.

REFERENCES:
patent: 2163010 (1939-06-01), Richards et al.
patent: 2167851 (1939-08-01), Pierson et al.
patent: 2609005 (1952-09-01), Booth
patent: 2759679 (1956-08-01), Torregrossa et al.
patent: 2968448 (1961-01-01), Drum
patent: 3794184 (1974-02-01), Higgins
patent: 3856150 (1974-12-01), Wellman

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