Cartridge case preparation device
OwnerDouglas Giraudinventor
Life of this patent
Estimating the term…
Abstract
Described are devices used to manufacture or assemble firearm ammunition using either new or used metallic cartridge cases. Specifically, these devices combine the necessary means to trim cartridge cases to a predetermined length while removing burrs and chambering both the inside and outside of the case mouth, removing cartridge case material used to crimp primers into the cartridge case by swaging, cutting the cartridge case primer pocket to a predetermined depth, chambering both the inside and outside surface of the cartridge case flash hole, and trimming the wall thickness of the cartridge case neck to a uniform dimension, all with the same device and by a manner that increases convenience and accuracy over any other means currently available.
Claims22
A cartridge case preparation device comprising:
- a base having two main planes being 90 degrees apart from each other, the main planes allowing the use of the device in either horizontal or vertical orientation;
- a derive system mounted to the base;
- and
- a cylindrical-shaped body mounted to the base, the body further comprising:
- a cartridge case holder assembly aligned through a center axis of the body;
- a rotating shaft assembly further comprising a main body shaft threadably attached to an interchangeable body section, the rotating shaft assembly having a first end accepting a plurality of sealed bearings, the rotating shaft assembly inserting at the first end into a bearing pocket of the body, the rotating shaft assembly coupled at a second end to the drive system;
- and
- a cylindrical guard fitting over and shielding a bowl-shaped relief cut into the body, the cylindrical guard slidably attached to the body.
A spring-loaded cartridge case holder assembly, for holding a cartridge case, and keeping the cartridge case from contacting a blade when the cartridge case is not touched, and for automatically withdrawing the case from the blade when additional manual force is not applied, the cartridge case holder assembly configured to present a cartridge case mouth towards a cutting action, the cartridge case holder assembly comprising:
- a cartridge case, with a cartridge mouth presented to the cartridge case holder assembly;
- an outer threaded body having a positive stop face for traveling the cartridge case, the outer threaded body mating at a first end with a cylindrical-shaped body;
- an annular groove about the inside of a second end of the outer threaded body;
- an inner support chamber having an annular step for limiting the travel of a mouth of a cartridge case, the inner support chamber secured to the second end of the outer threaded body having the annular groove;
- a spring biasing the inner support chamber against the outer threaded body;
- and
- an internal snap ring securing the inner support chamber inside the outer threaded body.
A spring-loaded cartridge case holder assembly, for holding a cartridge case and keeping the cartridge case from contacting a blade when the cartridge case is not touched, and for automatically withdrawing the case from the blade when additional manual force is not applied, the cartridge case holder assembly configured to present a cartridge case head towards a cutting action, the cartridge case holder assembly being internally contoured to match the largest diameter of a cartridge case, the cartridge case holder assembly comprising:
- a cartridge case, with a cartridge case head presented to the cartridge case holder assembly;
- an outer threaded body having a positive stop face inside its core, for traveling the cartridge case head, the outer threaded body mating at a first end with a cylindrical-shaped body;
- an annular groove about the inside of a second end of the outer threaded body;
- an inner support chamber having an annular step for limiting the travel of a head of a cartridge case, the inner support chamber secured to the second end of the outer threaded body having the annular groove;
- a spring biasing the inner support chamber against the outer threaded body;
- and
- an internal snap ring securing the inner support chamber inside the outer threaded body.
Dependencies are inferred from the claim text.