US 10,309,757 B1Granted

Ammunition reloading apparatus

OwnerVolodymyr Drobockyi, Anthony Viggianoinventors

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Abstract

A device for reshaping casings of spent ammunition cartridges, in one embodiment reduces the diametrical size of the casing wall by forcing the casing into an annular space at the end of a housing through which a plunger shaft slides. In another embodiment, the mouth of a casing is flared outwardly by engagement with the exterior of the end of a housing which has a circumscribing groove to enable easier disengagement of the re-shaped casing. The preferred reshaping devices comprise a plunger having shaft which, when contacted by a casing being re-shaped, compresses an elastomer spring that substantially fills a spring housing cavity and has an exceptionally high spring rate. After each reshaping, the spring causes the plunger shaft to disengage the casing from the device. A recess in the terminal end of a plunger shaft avoids damaging new types of unique two piece casings that have a wave at the interior bottom of the casing.

Claims15

Dependent claims

A device having a length axis, a proximal end, and a distal end, for reshaping a casing having a substantially cylindrical open-end portion a flash hole, and a wall, to prepare the casing for reuse, comprising:

a spring housing having an interior cavity, a first end which is the proximal end of the device, and a second end;
a plunger housing, having a first end connected to the second end of the spring housing, a second end which is the distal end of the device, and a bore running lengthwise from a bore opening at the second end of the plunger housing to said cavity of the spring housing;
a plunger comprising a piston slidably positioned for lengthwise movement within said interior cavity of the spring housing and a shaft connected to the piston, the shaft having a substantially smaller diameter than the piston, slidably positioned for lengthwise movement within the bore of the plunger housing and extending to a shaft terminal end at the distal end of the device, the plunger having a rest position wherein the terminal end of the shaft projects outwardly from said bore opening;
a spring, contained within the interior cavity of the spring housing and in contact with the piston, for urging the plunger toward the distal end of the device;
and,
a pin, substantially smaller in diameter than the terminal end of the plunger shaft, extending lengthwise therefrom, for fitting within the flash hole of the casing;
wherein the portion of said plunger housing bore which is near said bore opening decreases in diameter with distance from said bore opening and is spaced apart from the plunger shaft, thereby providing an annular space for receiving said open-end portion of the casing and for pressing radially inwardly the wall of the casing;
and,
wherein the terminal end of the plunger shaft comprises a face for pressing on the interior of the casing, the face having a recess circumscribing said pin.

6 more elements

A device having a length axis, a proximal end, and a distal end, for reshaping the substantially cylindrical open-end portion of a casing to prepare the casing for reuse, comprising:

a spring housing having an interior cavity, a first end which is the proximal end of the device, and a second end;
a plunger housing, having a first end connected to the second end of the spring housing, a second end which is the distal end of the device, and a bore running lengthwise from a bore opening at the second end of the plunger housing to said interior cavity of the spring housing;
a plunger comprising a piston slidably positioned for lengthwise movement within said interior cavity of the spring housing and a shaft connected to the piston, the shaft having a substantially smaller diameter than the piston and slidably positioned for lengthwise movement within the bore of the plunger housing, the shaft extending lengthwise to a shaft terminal end at the distal end of the device, the plunger having a rest position wherein the terminal end of the shaft projects outwardly from said bore opening;
and,
a spring, contained within the interior cavity of the spring housing and in contact with the piston, for urging the plunger toward the distal end of the device;
wherein said plunger housing second end is shaped for fitting into said open-end portion of the casing and comprises a frusto-conical exterior that increases in diameter with distance from said bore opening;
and, wherein at least one groove circumscribes said exterior of the plunger housing.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/653,995Filed 19 Jul 2017 · us provisional application
Priority: 19 Jul 2016
Granted: 4 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

F42B 33/10
Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor: reconditioning used cartridge cases
F42B 33/0207
Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges: processes for loading or filling propulsive or explosive…
F42B
Explosive charges

Family

Application62/363,941Us provisional application · filed 19 Jul 2016
US 10,309,757 B1This patent

From the US filing history. Foreign family members aren’t listed.

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