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
Filter-free projector
Electronic device with cooling module
Capacitor array layout arrangement for high matching methodology
System, method and computer readable medium for communicating with a zigbee device from a peripheral network
User equipment and mobile communication method
Use of aliasing in an installer
Indazole, benzisoxazole, and benzisothiazole kinase inhibitors
  Randomly Featured Patents
Semiconductor device and method of manufacturing the same
Exposure apparatus, exposure method, device manufacturing method, and system
Method for applying an ink-receiving layer to any given substrace
Technique for searching for a specific object in an ISPF panel for automated testing
Method and apparatus for collecting sharps
Lids for containers having rectilinear configurations
Learning apparatus and object detecting apparatus
Top board for tables, shelves or the like and a connector for board sections forming the top board or the like
Self-pumping water boiler system
Peroxy-containing microbicides stable in storage