Inventor:Crane; Robert F.
No. of patents:1
||Title Of Patent
||Pipe replacement method and rotary impact mechanism for pipe bursting
||June 29, 2004|
|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 |