Tunnel excavator

Details Tunnel excavator Tunnel excavator

1981-03-27

1983-06-14

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

299 67, E21D 908

Patent

active

043879284

ABSTRACT:
An excavator has a support mountable within the hull of a tunneling shield. A swing frame is rotatably journalled in the support about an axis canted with respect to the axis of the tunnel to permit effective application of an excavating implement. A link has one end pivotally mounted on the swing frame for moving the other end so that it has a component of movement toward and away from the work face of the tunnel. A dipper arm is pivotally mounted between the link and the excavating implement. A hydraulic drive means rotates the swing frame and pivots the link, dipper arm, and excavating implement.

REFERENCES:
patent: 2606013 (1952-08-01), Acker, Jr.
patent: 2652640 (1953-09-01), Schield
patent: 3404920 (1968-10-01), Tabor
patent: 3556599 (1971-01-01), Fikse
patent: 3612609 (1971-10-01), Reuls
patent: 3907093 (1975-09-01), Skibo
patent: 3958831 (1976-05-01), Nakashima et al.
patent: 4190294 (1980-02-01), Fikse
patent: 4203626 (1980-05-01), Hamburger
patent: 4349230 (1982-09-01), Hamburger et al.

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