Thin walled steel cartridge case
US4041868A · kind A · utility
28Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Feb 5, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B14/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thin walled steel cartridge case having a substantially larger internal volume than a conventional cartridge case. The cartridge case is fabricated from a high strength, heat treated carbon steel or boron steel and the wall contour in the head area is designed to avoid localized high stress. A low friction coating is applied to the outer surface of the cartridge case and serves to reduce stress concentrations in the head area and to reduce extraction force in the event of interference between the case and the chamber during extraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.