Excavator arm

Details Excavator arm Excavator arm

1989-12-18

1991-10-08

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

212247, 414722, E02F 332

Patent

active

050549901

ABSTRACT:
An excavator arm with basic boom 12, intermediate boom 14 and shovel stem 16 with digging implement is connected to a support part 86 which can be driven directly or indirectly into rotation about a vertical axis 84. In order to dig trenches with vertical walls outside the longitudinal axis of the vehicle and to achieve an advantageous transport position, the intermediate boom 14 consists of a front part 14a, a rear part 14b and a common rotary joint 20, the most advantageous transport position being achieved by rotating by 180.degree. the front part 14a, about the axis of rotation 22 set vertically, from the extended operational position relative to the rear part 14b.

REFERENCES:
patent: 3149737 (1964-09-01), Guinot
patent: 3283928 (1966-11-01), Bosredon
patent: 3313431 (1967-04-01), Kelly
patent: 3463336 (1969-08-01), Mork
patent: 4029225 (1977-06-01), Wirt
patent: 4394913 (1983-07-01), Lanning et al.
patent: 4797060 (1989-01-01), Kishi et al.

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