US PATENT SUBCLASS 299 / 1.3
.~ Of tunneling apparatus having a wall temporary support


Current as of: June, 1999
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299 /   HD   MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL

1.05  DF  AUTOMATIC CONTROL; SIGNALING OR INDICATING {4}
1.3.~ Of tunneling apparatus having a wall temporary support


DEFINITION

Classification: 299/1.3

Of tunneling apparatus having a wall temporary support:

(under subclass 1.05) Process or apparatus where a subterranean corridor is formed by an earth penetrating machine with a wall engaging means, where the machine is adjusted to follow a predetermined path.

SEE OR SEARCH CLASS

405, Hydraulic and Earth Engineering,

141+, for boring a tunnel with the cutting device including a shield.