1
Allan T Fisk, David I Freed, Thomas A Mann: Pipe bursting and replacement apparatus and method. Consolidated Edison Company of New York, Brooks Haidt Haffner & Delahunty, January 8, 1991: US04983071 (26 worldwide citation)

Tool for slitting and laterally expanding underground steel gas mains and inserting replacement plastic piping into the spread apart pipeline has a forward end cylindrical portion mounting a single, rearwardly angled blade to make only one line of cut, and a conical pipe spreader portion at its rear ...


2
Fisk Allan T, Freed David I, Mann Thomas A: Appareil servant a la coupe et au remplacement de tuyaux, et methode connexe, Pipe bursting and replacement apparatus and method. Consolidated Edison Company Of New York, SMART & BIGGAR, May 17, 1994: CA2036674 (1 worldwide citation)

TITLE: PIPE BURSTING AND REPLACEMENT APPARATUS AND METHOD Abstract of the Disclosure: Tool for slitting and laterally expanding undergroundsteel gas mains and inserting replacement plastic piping intothe spread apart pipeline has a forward end cylindrical portionmounting a single, rearwardly angled ...


3
Allan T Fisk, David I Freed, Thomas H Mann: Pipe bursting and replacement apparatus. Consolidated Edison Company of New York, Brooks Haidt Haffner & Delahunty, June 11, 1996: USRE035271

Tool for slitting and laterally expanding underground steel gas mains and inserting replacement plastic piping into the spread apart pipeline has a forward end cylindrical portion mounting a single, rearwardly angled blade to make only one line of cut, and a conical pipe spreader portion at its rear ...


4
Steven W Wentworth, Robert F Crane: Pipe bursting and replacement apparatus and method. Philip G Meyers, Philip G Meyers Law Office, November 4, 2004: US20040218982-A1

A pipe bursting and pulling apparatus for use in replacing horizontal underground pipes including a cylindrical body with a tapered forward section including means for attaching one of a cable, rod, rope or chain, the cylindrical body including an annular inner wall defining a longitudinally extendi ...


5
Steven W Wentworth, Robert F Crane: Pipe bursting and replacement apparatus and method. Philip G Meyers, Philip G Meyers Law Office, July 31, 2008: US20080181728-A1

A pipe bursting and pulling apparatus for use in replacing horizontal underground pipes including a cylindrical body with a tapered forward section including means for attaching one of a cable, rod, rope or chain, the cylindrical body including an annular inner wall defining a longitudinally extendi ...


6
Fisk Allan T, Freed David I, Mann Thomas A: Pipe bursting and replacement apparatus and method. Consolidated Edison Company Of New York, HAFFNER Alfred L Jr, November 28, 1991: WO/1991/018235

Tool (21) for slitting and laterally expanding underground steel gas mains (27) and inserting replacement plastic piping (77) into the spread apart pipeline has a forward end cylindrical portion (45a) mounting a single, rearwardly angled blade (56) to make only one line of cut (80) and a conical pip ...


7
Fisk Allan T, Freed David I, Mann Thomas A: Pipe bursting and replacement apparatus and method.. Cons Edison Co, March 3, 1993: EP0528801-A1

Tool for slitting and laterally expanding underground steel gas mains and inserting replacement plastic piping into the spread apart pipeline has a forward end cylindrical portion mounting a single, rearwardly angled blade to make only one line of cut, and a conical pipe spreader portion at its rear ...