초록 ▼

A dual sealed composite wad structure for use within a cartridge for a firearm. The wad structure comprises the following described integrally joined components: a shot column which has at least two separate, pliable petals; a shot column gas seal which forms the base of the shot column and fits aga

A dual sealed composite wad structure for use within a cartridge for a firearm. The wad structure comprises the following described integrally joined components: a shot column which has at least two separate, pliable petals; a shot column gas seal which forms the base of the shot column and fits against the interior surface of the cartridge to form a gas seal; a powder chamber gas seal; and a post section which has at least two pliable crimped post members attached between the shot column seal and the powder chamber gas seal. The powder chamber gas seal has an inverted cup-shaped lower surface providing an outer rim which fits loosely against the interior wall of the cartridge. The diameter of the powder chamber gas seal is smaller than the diameter of the shot column gas seal such that, upon ignition of the powder below the powder chamber gas seal, a limited amount of propulsive gas escapes into the post section. Under gas pressure, the rim of the shot column gas seal flares outwardly against the cartridge wall, thus preventing gas escape from the post section, and the rim of the powder chamber gas seal flares outwardly against the cartridge wall and confines the greater part of the propulsive force beneath the powder chamber gas seal. The dual seals of the current invention, in addition to the action of the crimped posts, thereby act to preclude shot deformation and reduce recoil without loss of shot velocity.

대표청구항 ▼

A dual sealed composite wad structure for use within a cartridge for a firearm which produces less shot deformation and provides a more accurate, dense shot cloud, such composite wad structures comprising: a shot column member for receiving shot of said cartridge, said shot column member having a ba

A dual sealed composite wad structure for use within a cartridge for a firearm which produces less shot deformation and provides a more accurate, dense shot cloud, such composite wad structures comprising: a shot column member for receiving shot of said cartridge, said shot column member having a base for substantially conforming with an interior surface of said cartridge to form a gas seal therebetween, and at least two pliable petal-shaped elements extending from said base, said petal-shaped elements configured whereby edges thereof closely approach to form a substantially continuous shot column wall when within said cartridge but substantially diverge when exterior said cartridge; a post section having at least two pliable post members each having a first end integrally joined to said base of said shot column, and a further end, said post members each being provided with a crimped portion intermediate said first and further ends whereby said post members bend upon application of compression force to opposite ends and resume initial configuration upon removal of said compressive force; and a powder chamber gas seal member, said powder chamber gas seal member provided with an upper surface integrally joined to said further ends of said post members, and an inverted cup-shaped lower surface defining an outer rim, said outer rim of said powder chamber gas seal having a diameter about 0.94 to about 0.97 times a diameter of said base of said shot column member, said powder chamber gas seal defining a peripheral cylindrical surface to be proximate to but spaced from said inner surface of said cartridge when within said cartridge to define a gap between said peripheral and said inner surface, said gap providing initial partial escape of gases from below said powder chamber gas seal into said post section.