Manuel E Vieira

US Patent:

39770761, Aug 31, 1976

Filed:

Oct 23, 1975

Appl. No.:

5/625021

Inventors:

Manuel Vieira - Union NJ
Michael M. Vieira - Union NJ
Robert M. Vieira - Union NJ

Assignee:

One Michigan Avenue Corporation - Union NJ

International Classification:

B23D 2114
B26D 316

US Classification:

30103

Abstract:

An internal pipe cutting tool to be inserted in an end opening of a pipe to be cut from the inside out has an outer elongated hollow support member with an adjustable support collar at one end to adjust the length of the pipe to be cut by the pipe cutting tool, and a cam member at the opposite end having a cam face of predetermined shape. An inner drive member lies in the longitudinal center line of the outer support member and projects at one end to the exterior thereof for receiving a driving tool on said exterior end and at the opposite end is threadably connected through the cam member so that a support and guide member outboard thereof will provide means for pivotally connecting the cutting jaws of a cutting jaw assembly disposed in assembled position to coact with the cam surface of said cam member. When the outer support member is turned clockwise the cam member is caused to expand the cutting jaws of the cutting jaw assembly into cutting position with the inner wall of the pipe to be cut and the inner drive member drives the expanded cutting jaws of the cutting jaw assembly, so that as the cutting jaw assembly is progressively expanded by clockwise movement of the outer support member the cutting jaws will progressively cut through the pipe to be cut from the inside wall out.