Abstract A shot shell having a tubular casing made of hard polycarbonate plastic and terminating at its lower end at an integral base wall formed to provide an inwardly and axially projecting primer pocket is provided with a soft, yieldable polyethylene base wad having an axially extending central passage within which said primer pocket is received. The concave top surface of the base wad has a central aperture of smaller diameter than said axially extending passage, thereby defining an annular shoulder which abuts against the top of said primer pocket in sealing contact therewith. The aforesaid central aperture in the top of the base wad has a diameter at least equal to that of the inside of the primer pocket to thereby provide an unrestricted flash passage above a primer cap inserted into the primer pocket. An annular clearance space between the axial passage in the base wad and the tubular primer pocket in combination with a plurality of longitudinally spaced peripheral teeth on the base wad provide expansion room into which the resilient base wad may be compressed downwardly to provide a cushioning and shock absorbing effect that protects the lower end and base wall of the hard plastic casing from the pressures generated by the exploding propellant charge within the casing.
Inventors
👤 George L Herter
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 12:48
CPC Classifications
F; F42; F42B; F42B7/00; F42B7/02; F42B7/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
201 words
A shot shell comprising: a tubular casing made entirely of hard, polycarbonate plastic, said casing terminating at its lower end at an integral base wall having a peripheral flange of larger diameter than said casing; a tubular primer pocket extending axially into said casing from the center of said base wall, said primer pocket being formed integrally with said base wall; an annular base wad having an elongated central passage within which said tubular primer pocket is received and a bottom surface conforming to the inside surface of said base wall and seated there against in surrounding relation to said primer pocket, said base wad being made from relatively soft, yieldable and resilient plastic an having an annular shoulder at the center thereof resting upon the top of said tubular pocket in sealing contact therewith, and the inside diameter of said shoulder being at least as great as the inside diameter of said tubular pocket; a powder charge within said casing on top of said base wad; and a plurality of continuous resilient teeth closely spaced longitudinally along said base wad and extending circumferentially about its periphery, said teeth being arranged in sealing contact with the inside surface of said casing.
Claim 2
Dependent Claim
201 words
A shot shell comprising: a tubular casing made entirely of hard, polycarbonate plastic, said casing terminating at its lower end at an integral base wall having a peripheral flange of larger diameter than said casing; a tubular primer pocket extending axially into said casing from the center of said base wall, said primer pocket being formed integrally with said base wall; an annular base wad having an elongated central passage within which said tubular primer pocket is received and a bottom surface conforming to the inside surface of said base wall and seated there against in surrounding relation to said primer pocket, said base wad being made from relatively soft, yieldable and resilient plastic an having an annular shoulder at the center thereof resting upon the top of said tubular pocket in sealing contact therewith, and the inside diameter of said shoulder being at least as great as the inside diameter of said tubular pocket; a powder charge within said casing on top of said base wad; and a plurality of continuous resilient teeth closely spaced longitudinally along said base wad and extending circumferentially about its periphery, said teeth being arranged in sealing contact with the inside surface of said casing.
Claim 3
Dependent Claim
80 words
A shot shell as defined in claim 1 wherein: the inside wall surface of said elongated central passage of said base wad is disposed radially outwardly from the outside surface of said tubular primer pocket for a substantial portion of the length thereof so as to define an elongated, annular clearance space therebetween into which the plastic material of said base wad may flow as it is compressed by the pressure generated by said powder charge exploding within said casing.