Pipe connection having a cutting ring
AssigneeH. Schwer GmbH Edelstahl-Fittings
InventorPaul Gumpel
Life of this patent
Estimating the term…
Abstract
In a pipe connection having a cutting ring comprising a metallic compound, in particular an alloy with the constituents CrNiMo, which cutting ring surrounds the pipe wall and can be pressed into same with at least one cutting edge, the cutting ring is cut to length and shaped from an elongate portion, in particular a hollow profile member or tube, that is drawn from stainless steel and cold hardened. A cutting ring (16) according to the invention of that kind is preferably cut to length from a tube drawn from stainless steel, and then shaped and cold hardened.
Claims14
A pipe connection comprising a shaped elongated cutting ring which embraces a wall of a pipe, said cutting ring having at least one cutting edge, means associated with said cutting ring for pressing said at least one cutting edge into the wall of the pipe, said cutting ring comprising a stable austenitic stainless steel CrNiMo alloy compound in cold hardened condition.
A method for forming a pipe connection having a cutting ring provided with at least one cutting edge comprising:
- providing a CrNiMo stainless steel alloy;
- drawing said alloy to form a hollow elongated piece;
- cold working said hollow elongated piece to form a cold hardened stable austenitic alloy piece;
- cutting a length from said cold hardened piece;
- and
- forming said cutting ring.
A method for forming a pipe connection having a cutting ring formed with at least one cutting edge comprising:
- providing a CrNiMo stainless steel alloy;
- drawing said alloy to form a hollow elongated piece;
- cutting a length from said hollow elongated piece;
- forming said cutting ring from said length of said hollow elongated piece;
- and
- cold working said cutting ring to form a cold hardened stable austenitic alloyed piece.
Dependencies are inferred from the claim text.