The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 2002
Filed:
May. 13, 1997
Applicant:
Inventor:
Christian J. Brahler, Naperville, IL (US);
Assignee:
TT Technologies, Inc., Aurora, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
F16L 1/028 ;
U.S. Cl.
CPC ...
F16L 1/028 ;
Abstract
The present invention is directed toward a method for replacing or lining existing underground pipe. The present invention replaces the pipe between two manholes without the need to dig associated trenches. A diagonal pilot hole is formed by a piercing tool. A guide cable is passed through the existing pipe and pilot hole and attached to a ramming tool operative in bringing new pipe through the pilot hole, and into the existing pipe. The ramming tool bursts the existing pipe into the surrounding soil and replaces the existing pipe with the new pipe.