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
Fuel cell with air channel actuator
Heap/stack guard pages using a wakeup unit
Charged particle cancer therapy beam path control method and apparatus
Radio link monitoring (RLM) and reference signal received power (RSRP) measurement for heterogeneous networks
Fluorescent dyes, fluorescent dye kits, and methods of preparing labeled molecules
Apparatus and method for adapted deblocking filtering strength
Methods, systems and computer program products for importing data from an edge router to a network management system
  Randomly Featured Patents
Thermally stabilized segmented copolyester adhesive
Cyclic triamine chelating agents
Multi carbide alloy for bimetallic cylinders
Pulse output circuit, display device, and electronic device
Folding stage riser
Anchored anulus method
Precision casting process
Air-fuel control for alternative engine fuels
Molding and gauging method
Valved two-way catheter