Ammunition and explosives – Cartridges – Shot
Reexamination Certificate
2000-06-14
2001-06-26
Tudor, Harold J. (Department: 3641)
Ammunition and explosives
Cartridges
Shot
C102S513000
Reexamination Certificate
active
06250228
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a shotgun cartridge to be used in hunting or skeet shooting in general.
There is a need for a steel shot loaded shotgun cartridge that can be safely fired through barrels designed for lead shot only. This cartridge should be constructed to facilitate a shrinkage. Nontoxic shot is lighter in weight than lead shot. This causes loss of killing range which is 80 yards with lead shot. Closer shooting and more lead on flying birds has to be used.
Lead on flying birds is difficult for most bird hunters, even with lead shot.
The newly designed 3½ inch shotgun cartridges overcomes some of the yardage loss but lead is still a factor. The older barrels are not chambered for 3½ inch cartridges.
There is a need for a means to identify a proper lead, hunting flying birds and kill distance. More cartridges are wasted in bird hunting than in any other type shotgun hunting. Lead and judging proper distance before firing are the major causes of misses or near misses. This is the cause of wounded suffering birds and expensive cartridge waste.
There is a need for a means of identifying lead and kill distance in bird hunting.
SUMMARY OF THE INVENTION
The present invention overcomes the disadvantages of prior art shotgun cartridges, and provides improvements previously considered outside the scope of operation of shotgun cartridges. In addition the present invention makes for a more skillful and economic form of shotgun bird hunting.
As used herein the term “compression rod cartridge” refers to a shotgun cartridge casing containing a centrally located “compression rod” within its inner confines.
As used herein the term “compression cylinder” cartridge refers to a shotgun cartridge casing containing a compressible cylinder within its inner confines.
As used herein the term “tracer cartridge” refers to a shotgun cartridge casing containing a powder filled “tracer tube” element, centrally located within its inner confines.
It is an object of the present invention to create a shotgun cartridge load that shrinks to the diameter of the barrel choke and passes through without damage to the choke diameter.
It is another object of the present invention to create a shotgun cartridge containing a powder filled tracer tube with a nonflammable, non-oxidizing, non-polluting, biodegradable powder such as calcium carbonate.
Other embodiments, features and advantages of the invention become apparent upon reading the specifications.
REFERENCES:
patent: 875762 (1908-01-01), Winans et al.
patent: 1457337 (1923-06-01), Barrows
patent: 2440568 (1948-04-01), Orter
patent: 3796157 (1974-03-01), Anderson
patent: 4167904 (1979-09-01), Ferri
patent: 4635555 (1987-01-01), Ferri
patent: 4733613 (1988-03-01), Bilsbury et al.
patent: 4773329 (1988-09-01), Bilsbury
patent: 5299502 (1994-04-01), Maki
patent: 5429054 (1995-07-01), Topping
patent: 632203 (1936-07-01), None
patent: 1454931 (1966-10-01), None
patent: 1427005 (1976-03-01), None
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