Adjustable boom

Details Adjustable boom Adjustable boom

1987-05-18

1988-10-04

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

414718, E02F 300

Patent

active

047752874

ABSTRACT:
An earth moving or grading machine having a first boom mounted on the base structure. A second boom is telescopically mounted to be received by the first boom and a third boom is mounted to the outermost end of the second boom. Articulated connecting means connects the third boom to the second boom so that the angle of articulation between the telescopically mounted second boom and the third boom can be adjusted.

REFERENCES:
patent: 3388819 (1968-06-01), Przybylski
patent: 3977547 (1976-08-01), Holopainen
patent: 4327932 (1982-05-01), Anderson
"Gradall Hydraulic Excavators Catalog No. G660C", 1985, The Gradall Company, New Philadelphia, Oh. 44663.
"See How To Beat Competitive Bidding with Gradall Attachments", Form No. EE-18412-R-5/85, The Gradall Company, New Philadelphia, Oh. 44663.

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