Boom assembly

Details Boom assembly Boom assembly

2011-01-25

2011-01-25

Brahan, Thomas J. (Department: 3654)

Traversing hoists

Boom position lock

C212S223000, C212S253000

Reexamination Certificate

active

07874438

ABSTRACT:
A boom assembly comprising: a base anchored to a structure/ground. A boom is rotatably mounted to the base at a connected end so as to be rotatable about a generally vertical axis, the boom having a device to support loads at a free end. An orientation clutch is provided between the base and the boom. The orientation clutch has a mechanism for locking a rotation of the boom with respect to the generally vertical axis so as to selectively adjust an orientation of the boom. The orientation clutch has a release configuration to allow the boom to self-adjust its orientation to align with a load pulled by the device.

REFERENCES:
patent: 2782940 (1957-02-01), Beseler
patent: 4200315 (1980-04-01), Carlsson
patent: 4496166 (1985-01-01), Anderson
patent: 6893189 (2005-05-01), Matsushita et al.
patent: 1214510 (1986-02-01), None

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