Lead-free primed rimfire cartridge
US5216199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B5/32
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing an improved lead-free primed rimfire cartridge for ammunition or industrial powerloads providing a gas source for driving fasteners with power-fastening tools. A lead-free priming mixture is consolidated into an annular cavity of a rimfire casing and dried in the cavity. The primer is secured in the cavity by tamping at least a portion of propellant into the casing against and over the dried primer. The tamping pressure per casing may range from 1,300 psi to 8,800 psi. Any remaining portion of required propellent is added over the tamped compacted propellant layer. The ammunition and powerload casings are then sealed and finished in a conventional manner. A rimfire cartridge for both ammunition and industrial powerload applications manufactured as described above is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.