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
Process and intermediates for preparing lapatinib
Particle measurement process and apparatus
Process for producing .beta.-sialon fluorescent material
Electrical conduit containing a fire-resisting thermoplastic composition
Carrying case
Author signatures for legal purposes
Near-field transducers for focusing light
  Randomly Featured Patents
Device for extracting from a milking flow an analysis sample having a proportional amount
Via transmission lines for multilayer printed circuit boards
Assembly node
Method and apparatus for removing contamination from substrate
Method for machining components of a gas turbine and composite material
Compact multi-use lancing device
Water tap
Oil filled rotary damper having a symmetrically shaped flexible membrane
.DELTA..SIGMA. digital-to-analog converter with bit grouping by significance for reducing feedback computation time
Method for installing a number of risers or tendons and vessel for carrying out said method