Invention Grant
- Patent Title: Long cartridge case
-
Application No.: US16661058Application Date: 2019-10-23
-
Publication No.: US11333473B2Publication Date: 2022-05-17
- Inventor: Jeffrey W. Carper , Christopher W. Snavely
- Applicant: National Machinery LLC
- Applicant Address: US OH Tiffin
- Assignee: National Machinery LLC
- Current Assignee: National Machinery LLC
- Current Assignee Address: US OH Tiffin
- Agency: Pearne & Gordon LLP
- Main IPC: B21K21/04
- IPC: B21K21/04 ; F42B33/00 ; B21C23/21 ; B21C23/20 ; F42B5/02 ; B21C23/18 ; F42B5/28

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.
Public/Granted literature
- US20200056870A1 LONG CARTRIDGE CASE Public/Granted day:2020-02-20
Information query