Resources Contact Us Home
Pipe replacement method and rotary impact mechanism for pipe bursting

Image Number 7 for United States Patent #6755593.

An impactor for use with a directional boring machine having a drill string connectable to the impactor for pulling the impactor through an existing pipeline uses rotation of the drill string to drive an internal striker. The internal striker delivers impacts in the pulling direction to an impactor housing as the impactor housing tows a replacement pipe behind it. The impactor housing is free to move axially in response to impacts from the striker over a limited distance in the pulling direction independently of the replacement pipe and drill string.

  Recently Added Patents
Pharmaceutical compositions of paclitaxel, paclitaxel analogs or paclitaxel conjugates and related methods of preparation and use
Halogen-free flame retardants for epoxy resin systems
Image coding apparatus and image decoding apparatus
Cognitive radio cooperative spectrum sensing method and fusion center performing cognitive radio cooperative spectrum sensing
Process and apparatus for producing composite material that includes carbon nanotubes
Resistive random access memory cell and resistive random access memory module
Methods of saccharification of polysaccharides in plants
  Randomly Featured Patents
Dew sensor having a conductive power-containing moisture sensing material disposed between opposing electrodes
Suspension transport system
Apparatus and a method for investigating the properties of a solid material by inverse chromatography
Cover for working cast and articulator
Leg and foot shield
Pallet guard section
Adjustable, self-balancing flat panel display mounting system
Control system for mechanically adjustable speed motor drives
Photographic elements containing acyl substituted oxonol dyes
Orthodontic bracket