The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2022
Filed:
Oct. 23, 2019
Applicant:
National Machinery Llc, Tiffin, OH (US);
Inventors:
Jeffrey W. Carper, Tiffin, OH (US);
Christopher W. Snavely, Republic, OH (US);
Assignee:
NATIONAL MACHINERY LLC, Tiffin, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K 21/04 (2006.01); F42B 33/00 (2006.01); B21C 23/21 (2006.01); B21C 23/20 (2006.01); F42B 5/02 (2006.01); B21C 23/18 (2006.01); F42B 5/28 (2006.01);
U.S. Cl.
CPC ...
F42B 33/00 (2013.01); B21C 23/186 (2013.01); B21C 23/205 (2013.01); B21C 23/217 (2013.01); B21C 23/218 (2013.01); B21K 21/04 (2013.01); F42B 5/02 (2013.01); F42B 5/28 (2013.01);
Abstract
A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.