Resources Contact Us Home
Earth boring system

Image Number 16 for United States Patent #7293615.

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.

  Recently Added Patents
Soybean cultivar CL1013665
Functional component compensation reconfiguration system and method
Light-emitting element, light-emitting device, and electronic device
Thin film transistor and flat panel display device including the same
Multiple carrier compression scheme
Dynamic web page construction based on determination of client device location
Tool bag with removable tool wall
  Randomly Featured Patents
Exhaust device for a four-cycle outboard motor
Central heating furnace
Apparatus and method of producing a food server with pre-fold of glue panels
Dynamic context-data tag cloud
Ladies competition suit
Reflective mechanism for stage lamp
Coin discriminating apparatus
Flame treatment apparatus
Method for treating infertility comprising administering GnRH analog, gonadotrophins, and growth hormone
Electrostatic chuck for wafer metrology and inspection equipment