Back to results
US 5,208,424 AGranted
Full metal jacket hollow point bullet
AssigneeOlin Corporation
InventorsDavid K. Schluckebier, Jack D. Dippold, Alan J. Corzine
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeOlin Corporation
InventorsDavid K. Schluckebier, Jack D. Dippold, Alan J. Corzine
Estimating the term…
A full metal jacket hollow point bullet is disclosed which has a portion of the jacket extending within the hollow open front end of the bullet. The portion of the jacket in the hollow front end has a plurality of radial slits and reinforced pointed prongs therebetween. A rearwardly extending completely empty blind bore extends from the tips of the prongs axially rearwardly into the bullet core. The base of each of the prongs is reinforced at the mouth of the front end by a fillet on each side between the ogive portion of the jacket and the base of the prong in the hollow front end. These prongs project generally radially outward upon upset of the bullet in soft tissue after passing through barrier materials such as clothing and deer hide. The jacket has a coating of copper oxide on its inner and outer surfaces which bonds the soft lead core to the jacket and minimizes lead wash.
A bullet comprising:
A bullet comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Of the casing: coatings
Characterised by the warhead or the intended effect: expanding before or on impact, i.e. of dumdum or mushroom type
Of the casing: of jackets for smallarm bullets ; Jacketed bullets or projectiles
Explosive charges
Term ended 2 Apr 2011 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention generally relates to bullets and more particularly to a small caliber projectile having a hollow point and a full metal jacket.
Jacketed bullets are well known in the art. The bullet typically is made of a lead alloy and has a jacket typically made of a copper alloy and covers at least part of the ogive and the cylindrical body portions of the bullet. This type of jacketed bullet gives a more controlled expansion in soft body tissue than an unjacketed lead bullet. Further expansion can be obtained upon initial target penetration by providing a hollow in the front end of the bullet. The front end may also be formed with cuts and/or ribs in the jacket or with cuts or ribs in the core within the hollow tip to further control the expansion upon upset of the bullet in soft tissue.
One typical hollow point jacketed bullet is disclosed in U.S. Pat. No. 3,157,137, assigned to the assignee of the present invention. This patent discloses a jacketed bullet with a rosette type of hollow point formed entirely from the open jacket end. Another is U.S. Pat. No. 3,349,711 which has external cuts in the ogive portion of the full metal jacket around the hollow tip. Another example is U.S. Pat. No. 4,550,662. In this patent, the hollow tip is formed with axially extending ribs in the soft metal core.
FIG. 1 is a side elevational view of a cartridge containing the bullet in accordance with a first embodiment of the invention.
FIG. 2 is an end view of the bullet of the first embodiment of the invention removed from the cartridge case in FIG. 1.
FIG. 3 is a longitudinal cross sectional view of the bullet of the invention taken along the line 3--3 in FIG. 2.
A first embodiment of a full metal jacket hollow point bullet 10 constructed in accordance with the invention is shown loaded into a cartridge case 12 in FIG. 1 and separately in FIGS. 2 and 3.
Bullet 10 has a generally cylindrical core body portion 14, a generally ogival front end portion 16, and a hollow open recess or cavity 18 axially extending into the front end portion 16. The core portions 14 and 16 are preferably formed of a malleable metal such as lead or a lead alloy.
A full metal jacket 20 covers at least a major portion of the cylindrical core body portion 14, all of the ogival front end portion 16 and extends fully into the hollow open cavity 18 so as to enclose the front end portion 16. The jacket is made of a malleable metal such as a copper or copper alloy.