Patent ID: 8857036
Filing Date: 2014-10-14
Classification: F16L,Y10T

Abstract:
1. A method of forming a leak tight connection between a pipe and a port made of different metals, the method comprising: inserting the pipe positioned in a plastic grommet, into an opening in the port, the pipe being made of a first metal and the port being made of a second metal; providing a tool, the tool comprising an expandable portion and an inner wedge capable of increasing a diameter of the tool, further comprising, as to the expandable portion, a split tubular stiffener comprising a tube having at least one cut along a portion of a length of the tube and a projection on the end; inserting the tool into the pipe; rotating the tool in the pipe and increasing the diameter of the tool by pulling up the inner wedge whereby the projection engages an inner wall of the pipe, the increased diameter of the tool increasing the diameter of the pipe and forming a first seal between the pipe and the port at a first position in the pipe where the projection engages the inner wall of the pipe; and removing the tool from the pipe.