Process and apparatus to form an underground passage or space
OwnerShanda Tianinventor
Life of this patent
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Abstract
The invention is in an apparatus of self propelled type for forming an underground passage or space as the apparatus moves horizontally, vertically or in some other direction relative to the surface of the ground. The apparatus includes a head for reducing resistance of the soil through which it moves and for squeezing the soil in a desired direction as the head is caused to undergo multimode vibration. The apparatus also includes a thrust producing means for developing forward thrust and a connection for connecting the head and thrust producing means.
Claims20
An apparatus for self-propelled movement in soil for forming an underground passage or space comprising
- (a) head means for reducing resistance of the soil and squeezing the soil in a desired direction;
- (b) means supported within said head means for imparting to said head means a controlled multimode vibration;
- (c) thrust producing means including
- (1) thrust spiral means for engaging said soil and in cooperation with said head means develops a forward thrust to advance said apparatus, and
- (2) a prime mover for rotating said thrust spiral means;
- (d) connection means for connecting said thrust producing means and head means.
Dependencies are inferred from the claim text.