Earth boring system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 13, 2007
Grant Date -
Sep 1, 2005
app pub date -
Nov 22, 2004
filing date -
Nov 20, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An earth boring apparatus for sinking shafts and removing shaft material from the shaft, the apparatus having at least two decks; hydraulic means for allowing movement of the decks relative to one another; releasable anchoring means associated with the decks for engaging walls of the shaft to secure the apparatus in a stationary position; whereby the releasable anchoring means of one of the decks engages the wall while the releasable anchoring means of the other deck is released from the wall to allow motion of the other deck along the shaft, in cooperation with the hydraulic means. The apparatus also includes guide means for forcing a bucket for hoisting shaft material from the shaft along a predetermined path, and an in-stage cut-boom drill.
First Claim
Other Claims data not available
