Rifle barrel
First Claim
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1. IN A RIFLE BARREL, THE COMBINATION OF AN OUTER TUBE CONSISTING OF A FIBERGLASS REINFORCED PLASTIC, AN INNER METAL FLEXIBLE TUBE HAVING A SMOOTH BORE AND SUBSTANTIALLY COEXTENSIVE IN LENGTH WITH SAID OUTER TUBE, SAID TUBES LONGITUDINALLY THEREOF AND HAVING A LONGITUDINAL TWIST CONFORMING TO A DESIRED RIFLING OF SAID BARREL, SAID OUTER TUBE EXERTING THOURGH SAID RISERS A FORCE WHEREBY SAID INNER TUBE IS PRESTRESSED IN COMPRESSION AND THE WALL OF SAID INNER TUBE HAVING A THICKNESS SUCH THAT SAID SMOOTH BORE IS CHANGED TO A RIFLED BORE BY FLEXURE UPON THE APPLICATION OF A PREDETERMINED GAS PRESSURE THEREIN.
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1 Claim
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1. IN A RIFLE BARREL, THE COMBINATION OF AN OUTER TUBE CONSISTING OF A FIBERGLASS REINFORCED PLASTIC, AN INNER METAL FLEXIBLE TUBE HAVING A SMOOTH BORE AND SUBSTANTIALLY COEXTENSIVE IN LENGTH WITH SAID OUTER TUBE, SAID TUBES LONGITUDINALLY THEREOF AND HAVING A LONGITUDINAL TWIST CONFORMING TO A DESIRED RIFLING OF SAID BARREL, SAID OUTER TUBE EXERTING THOURGH SAID RISERS A FORCE WHEREBY SAID INNER TUBE IS PRESTRESSED IN COMPRESSION AND THE WALL OF SAID INNER TUBE HAVING A THICKNESS SUCH THAT SAID SMOOTH BORE IS CHANGED TO A RIFLED BORE BY FLEXURE UPON THE APPLICATION OF A PREDETERMINED GAS PRESSURE THEREIN.
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Current AssigneeAndrew J. Grandy, John J. Donnely Jr
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Original AssigneeAndrew J. Grandy, John J. Donnely Jr
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InventorsGrandy, Andrew J., Donnely, John J. Jr.
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Application NumberUS04/023,582Time in Patent Office2,092 DaysField of SearchUS Class Current89/16CPC Class CodesF41A 21/02 Composite barrels, i.e. bar...
