Method and apparatus for production of cartridged propellant charges for barrel weapons
US4688465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Feb 20, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B33/025
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method and an apparatus for production of cartridged propellant charges for barrel weapons with charge weights up to 1.4 kg/liter. According to the invention, more granular or particle-shaped propellant powder is driven down or compacted than can be housed in free-running condition within the same volume by means of a piston or plunger (6) in a single stage down into a case (4) the inside of which is coated with a friction-reducing coating. The piston or plunger (6) can then be provided with an elastically deformable leading part (7) of e.g. rubber and/or with a conically tipped leading end (7a). According to one variant of the invention the powder is pressed down into a bag (12, 13) of combustible fibre material which has been inserted in advance down into the case (4) coated internally with a friction-reducing coating or which has itself been impregnated with a friction-reducing coating. The invention also enables the powder to be compacted to advantage at a temperature that is higher than the room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.