Back to results
US 4,169,629 AGranted
Tunneling machine with plural adjustable arms carrying single cutter
OwnerMarie G. J. Legrandinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerMarie G. J. Legrandinventor
Estimating the term…
Machine for the digging of passages, galeries or tunnels in underground work, of the type in which the stoping device consists of a single stoping drum or mill of which the axis of rotation is practically perpendicular to the plane of the working-face, and whereby this rotary mill is attached to an arm which pivots around a shaft which is also practically perpendicular to the working-face, characterized by the fact that the latter bears in a second arm, which in its turn is attached on a shaft which is practically perpendicular to the working-face and bears in the machine frame, whereby the length of the two arms and the angles of rotation of the arms are chosen in such a manner that the mill can cover the entire surface of the working-face to be stoped, without having to move the machine laterally.
Machine for the digging of passages, galeries or tunnels in underground work, of the type in which the stoping device consists of a single rotary cutter of which the axis of rotation is generally perpendicular to the plane of the working-face, said rotary cutter being mounted on a first arm which pivots around an axis which is also generally perpendicular to the working-face, said first arm being journalled about said axis on a second arm, which in turn is attached on a shaft which is generally perpendicular to the working-face and bears in the machine frame, the length of the two arms and the angles of rotation of the arms being selected so that the mill can cover the entire surface of the working-face to be stoped, without having to move the machine laterally.
Dependencies are inferred from the claim text.