Compact case trimmer
OwnerDouglas Hilton Giraudinventor
Life of this patent
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Abstract
A method and apparatus for sizing ammunition cartridge cases includes a cartridge case trimmer including a cylindrical housing, a mandrel detachably coupled to a longitudinally-oriented opening formed in a first side of the cylindrical housing, the mandrel having a first end including a cutting tool disposed in a slot on the first end and comprising one or more notched cutting surfaces, the mandrel having a second end opposing the first end, the second end protruding from the first side of the cylindrical housing and sized to be received in a chuck, a bearing disposed within the cylindrical housing adjacent to a second side of the cylindrical housing, and an insert comprising a tapered region disposed in an inside diameter of an inner ring of the bearing.
Claims15
A cartridge case trimmer, comprising:
- a cylindrical housing having a longitudinally-oriented opening formed in a first side of the housing;
- a detachable transparent cover disposed on the cylindrical housing;
- a mandrel detachably coupled to the longitudinally-oriented opening formed in a first side of the cylindrical housing, the mandrel having a first end including a cutting tool disposed in a slot on the first end and comprising one or more notched cutting surfaces, the mandrel having a second end opposing the first end, the second end protruding from the first side of the cylindrical housing and sized to be received in a chuck;
- a bearing disposed within the cylindrical housing adjacent to a second side of the cylindrical housing;
- and
- a removable and replaceable insert comprising a tapered region disposed in an inside diameter of an inner ring of the bearing to receive a cartridge case, wherein the longitudinally oriented opening includes a threaded region having a length that is less than a length of the mandrel, and wherein the mandrel includes threads that interface with the threaded region.
A cartridge case trimmer, comprising:
- a cylindrical housing having a longitudinally-oriented opening formed in a first side of the housing;
- a mandrel having a first end and a second end opposing the first end, the first end of the mandrel being detachably coupled to the longitudinally-oriented opening formed in a first side of the cylindrical housing and including a cutting tool that has a cutting edge that extends beyond a diameter of the mandrel, the second end of the mandrel protruding from the first side of the cylindrical housing and sized to be received in a chuck;
- a locking fastener that couples the mandrel to the cylindrical housing;
- a bearing disposed within the cylindrical housing adjacent to a second side of the cylindrical housing;
- and
- an insert disposed in an inside diameter of an inner ring of the bearing, the insert being replaceable based on a desired cartridge case caliber to be trimmed, wherein the longitudinally-oriented opening includes a threaded region and a channel is formed across a portion of the threaded region, and wherein a width of the channel is slightly greater than a width of the cutting tool.
A cartridge case trimmer, comprising:
- a cylindrical housing having a first side and a second side opposing the first side and a longitudinally-oriented opening having a threaded region formed in the first side of the housing;
- a mandrel detachably coupled to the longitudinally-oriented opening comprising a threaded region formed in the first side of the cylindrical housing, the mandrel having a first end including a cutting tool disposed in an indexing slot on the first end and comprising one or more notched cutting surfaces, the mandrel having a second end opposing the first end, the second end protruding from the first side of the cylindrical housing and sized to be received in a chuck and having a channel across a portion of the threaded region of the opening;
- a bearing disposed within the cylindrical housing adjacent to a second side of the cylindrical housing;
- and
- an insert disposed in an inside diameter of an inner ring of the bearing to receive a cartridge case, wherein the cutting tool is configured to reduce a length of the cartridge case, chamfer the cartridge case, and deburr the cartridge case in one operation.
Dependencies are inferred from the claim text.