Shotshell having a protective barrier layer
First Claim
1. A shotshell comprising:
- a projectile;
a propellant charge;
a hull having a plastic portion extending for a substantial portion of a length of the shotshell and accommodating the projectile in a front portion and the propellant charge in an aft portion;
a metallic cap attached to the hull at an aft end of the hull; and
a thermally protective material selected from the group consisting of paper and fiberglass and adhered to a substantially cylindrical exterior surface of the plastic portion.
1 Assignment
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Accused Products
Abstract
A shotshell having a hull with a protective barrier layer of fiber or other alternate material that prevents the hull from being in contact with the chamber. The protective layer may cover any portion of the exterior of the hull. The protective layer protects the plastic hull from the hot chamber of the barrel that would adversely affect the structural integrity or functioning of the shotshell. The protective material may be of precut size and thickness that when applied to the exterior of the hull will increase the diameter to reduce the clearance with the chamber and thereby resist sliding out of the chamber before the breech is closed. The protective layer may also have an adhesive surface disposed between the exterior surface of the hull and the protective layer to prevent the separation of the hull and the protective material.
25 Citations
19 Claims
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1. A shotshell comprising:
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a projectile; a propellant charge; a hull having a plastic portion extending for a substantial portion of a length of the shotshell and accommodating the projectile in a front portion and the propellant charge in an aft portion; a metallic cap attached to the hull at an aft end of the hull; and a thermally protective material selected from the group consisting of paper and fiberglass and adhered to a substantially cylindrical exterior surface of the plastic portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An industrial shell for use with an industrial ballistic tool comprising:
- a projectile;
a hull having a plastic portion extending for a substantial portion of a length of the shell and having a front portion holding the projectile and an aft portion enclosing a propellant charge; a metallic cap attached to the hull at an aft end of the hull; and a thermally protective member substantially surrounding and adhered to a substantially cylindrical exterior surface of the plastic portion and comprising a material selected from the group consisting of paper and fiberglass. - View Dependent Claims (17, 18)
- a projectile;
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19. A method for preparing a shotshell for discharging from a firing chamber comprising:
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forming a hollow hull having a plastic portion having exterior and interior surfaces; forming a metallic cap at a proximal end of said hull for receiving a primer; and forming a thermally protective material layer adhering to a substantially cylindrical portion of the exterior surface wherein the protective material is selected from the group consisting of paper and fiberglass for providing the barrier between a plastic portion of the hull and the firing chamber and having substantially greater resistance to melting and softening than the plastic portion when contacted with such chamber having a temperature elevated by repeated firing and having a thickness effective to slightly increase a diameter of said shotshell.
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Specification