Articulated boom jib assembly

Details Articulated boom jib assembly Articulated boom jib assembly

1988-03-28

1989-06-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Means maintaining platform level on angularly movable support

Swingable support

212266, B66F 1104

Patent

active

048383813

ABSTRACT:
A jib assembly displaceably attached to an articulated boom comprising an elongated jib member having an attachment sleeve element secured thereto. A planetary gear reducer having a driving element, is coupled to a gear train and securable inside the boom. The gear train has an output drive gear protruding adjacent a side wall of the boom. A drive gear coupling element is secured to the jib attachment sleeve and in toothed engagement with the output drive gear for rotatably connecting the sleeve element closely spaced to the boom side wall to reduce stress on the gear coupling caused by the load associated with the jib assembly. Also, stress is reduced on the bucket support shaft associated with said boom by providing a closer spacing of the bucket to the boom.

REFERENCES:
patent: 3146853 (1964-09-01), Eckels
patent: 3474922 (1969-02-01), Wood et al.
patent: 4466506 (1984-08-01), Dolenti
patent: 4533119 (1985-08-01), Liverance et al.
patent: 4582206 (1986-04-01), Johnson

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