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Crane; Robert F.
Oconomowod, WI
No. of patents:

Patent Number Title Of Patent Date Issued
6755593 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

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