Tool controlling mechanisms for excavator with telescopic arm

Details Tool controlling mechanisms for excavator with telescopic arm Tool controlling mechanisms for excavator with telescopic arm

1990-04-09

1992-03-03

Werner, Frank E.

Material or article handling

Vertically swinging load support

Shovel or fork type

414912, 414694, 52118, 212268, B66C 2300

Patent

active

050927337

ABSTRACT:
An excavator comprising a movable body, a boom mounted on the movable body, first hydraulic cylinders, an outer arm pivotally mounted on the boom, a second hydraulic cylinder mounted on a rear surface of the boom, an inner arm inserted into the outer arm and movable telescopically relative to the outer arm, a bucket connected to one end of the inner arm, a bucket connected to the tip end of the inner arm, a bucket cylinder provided between the bucket and a guide mechanism, the guide mechanism being slidably mounted on guide plates fixed to the outer arm, a third hydraulic cylinder connected to a base end of the outer arm and having a rod connected to a central portion of the inner arm for moving the inner arm relative to the outer arm, and a synchronizing device for moving the base end of the outer arm for a length corresponding to the distance the inner arm moves relative to the outer arm. A hook mechanism can be mounted at a front portion of the inner arm. An interlocking device can be connected between the guide mechanism and the front portion of the inner arm.

REFERENCES:
patent: 3245559 (1966-04-01), Russell
patent: 3390794 (1968-07-01), McMullen et al.
patent: 3624785 (1971-11-01), Wilson
patent: 3688930 (1972-09-01), Shumaker
patent: 3836025 (1974-09-01), Olson et al.
patent: 3874532 (1975-04-01), Metailler
patent: 4274797 (1981-06-01), Coon
patent: 4293270 (1981-10-01), Prime
patent: 4523684 (1985-06-01), Baisden
patent: 4699562 (1987-10-01), Crook et al.
patent: 4793765 (1988-12-01), Paul et al.

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