Back to results
US 2009/0014082 A1Published application
Exhaust apparatus and method
OwnerJames R. Cannaleyinventor
Life of this patent
Estimating the term…
Abstract
A rotary swaging method for the tapering of metal tubes is disclosed. The method comprises the use of a rotary swaging machine comprising a die comprising a die taper comprising a length of greater than about 12 inches, a diameter reduction of greater than about 30%, and/or a taper angle of less than about 12 degrees.
Claims20
1) A method for imparting a taper of length greater than 12 inches to a tubular metal work piece, said method comprising the steps of:
- a) providing a tubular metal work piece;
- b) providing a rotary swaging machine comprising a die comprising:
- a die taper of length greater than 12 inches;
- a die taper having a reduction in diameter of greater than about 30%;
- or
- a die taper having a taper angle of greater than about 12 degrees;
- c) rotary swaging an endlength of said tubular metal work piece, with said rotary swaging machine, through said die, thereby imparting a taper to the work piece;
- wherein the taper imparted to the work piece in a single pass has a length bounded by a first diameter and a second diameter;
- wherein the second diameter is less than the first diameter;
- and wherein the taper is free of flaking and cracks.
7 more elements
14) A die element having the following specifications:
- a die taper of length greater than 12 inches;
- a die taper having a reduction in diameter of greater than about 30%;
- or
- a die taper having a taper angle of greater than about 12 degrees.
1 more element
Dependencies are inferred from the claim text.