Excavator

Details Excavator Excavator

1986-04-24

1988-02-16

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

414694, 4146955, 414718, E02F 502

Patent

active

047251875

ABSTRACT:
An excavator for use in tunneling operations wherein there is minimal head room, comprising a boom mounted to a mobile carriage for rectilinear movement in a horizontal plane and angular movement in a vertical plane. A rigid arm is pivotally mounted at one end to the distal end of the boom for angular movement relative thereto and a slide is supported by the arm for rectilinear movement thereon. The backhoe is fixed to the slide and there is linkage for manipulating the backhoe.

REFERENCES:
patent: 3002638 (1961-10-01), Needy
patent: 3129831 (1964-04-01), Mrozek
patent: 3319812 (1967-05-01), Waite
patent: 3445015 (1969-05-01), Sampo et al.
patent: 4142308 (1979-03-01), Brandtjen
patent: 4264265 (1981-04-01), Stoychoff
patent: 4266908 (1981-05-01), Leiker
patent: 4274797 (1981-06-01), Coon
patent: 4306832 (1981-12-01), Schmiesing
patent: 4553899 (1985-11-01), Magni
patent: 4677772 (1987-07-01), Morelli

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