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US 7,461,597 B2Granted
Waterproof cartridge seal
AssigneeCombined Systems, Inc.
InventorMichael Brunn
Life of this patent
Estimating the term…
Abstract
A closure wad is placed at the mouth of the launching end of a shotgun cartridge before the mouth is crimped down to seal the launching end of the cartridge. Both the walls of the closure cap and the walls at the mouth of the plastic envelope are crimped down together, thereby forming a substantially impermeable seal at the launching end of the cartridge. In addition, the inventive closure cap substantially reduces the detritus which is sometimes expelled when a launcher cartridge is fired.
Claims13
A cartridge comprising:
- a rigid base;
- an envelope forming a tube having a base end connected to said rigid base and a launching end opposite said base end;
- a closure wad at the launching end of the envelope;
- and
- a closure cap disposed adjacent the closure wad, said closure cap comprising:
- a bottom;
- a side wall extending from said bottom, said bottom and
- side wall forming a tube having the bottom at one end and
- an opening at the other end opposite the bottom;
- wherein the launching end of the envelope and the side wall of the opening end of the closure cap are crimped together to form a substantially impermeable seal.
7 more elements
Dependencies are inferred from the claim text.