Ammunition and explosives – Cartridges – Practice projectile type
Reexamination Certificate
1998-12-30
2001-02-20
Poon, Peter M. (Department: 3643)
Ammunition and explosives
Cartridges
Practice projectile type
C042S096000
Reexamination Certificate
active
06189454
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to reusable training or practice rounds of ammunition. The invention relates in particular to so-called “dummy” rounds of ammunition which contain no explosive.
In many practice or training applications of firearms, such as practice in use of the loading and ejection mechanisms, the use of live ammunition is not necessary. In such applications, the use of live ammunition is undesirable, because it is dangerous and expensive. It is dangerous because of the obvious risk of accidental discharge, which may create a life-threatening situation for the operator and endanger surrounding animate and inanimate objects. It is expensive because live ammunition is “consumed”, even though not discharged or fired since, in undergoing contact with the loading and ejection mechanisms of firearms, live ammunition is generally damaged to the extent that it should not be relied on to fire properly. Thus, it is common to discard live ammunition after it has been used in testing or training in the loading and ejection mechanisms of firearms.
It is possible to use blank ammunition for testing, training or practice purposes, but this has most of the disadvantages of live ammunition, discussed above, although it is less dangerous because it does not have a projectile.
Accordingly, there have heretofore been provided inert or “dummy” practice rounds which do not contain explosives. However, some such prior inert practice rounds have been of relatively complex and expensive multi-part construction. Others, made for small caliber guns, have been made of plastic and can serve only as a dry fire round for a short period of time. Such practice rounds do not resemble live ammunition sufficiently for actual practice of loading and unloading of a firearm and will not cycle without breaking. Other types of practice rounds are simply made from real ammunition, assembled without primer or gun powder. These latter types cannot be dry fired and are also short-lived in cycling service due to being made of generally soft brass. Furthermore, prior inert practice rounds designed for larger caliber guns have typically been designed to closely simulate live ammunition of comparable caliber in appearance, weight and balance. Thus, such practice rounds could easily be mistaken for actual live ammunition.
SUMMARY OF THE INVENTION
It is a general object of the invention to provide an inert practice round which avoids the disadvantages of prior practice rounds while affording additional structural and operating advantages.
An important feature of the invention is the provision of an inert practice round which is of simple and economical construction that will withstand the rigors of extended cycling and dry firing.
Another feature of the invention is the provision of a practice round of the type set forth, which does not damage the firing pins of associated firearms.
Still another feature of the invention is the provision of a practice round of the type set forth which can readily be distinguished from live ammunition of the same caliber.
Certain ones of these and other features of the invention may be attained by providing an inert practice round comprising: a unitary, one-piece, solid, cavityless body having an external surface contour and size of a live round of a predetermined caliber.
Other features of the invention may be attained by providing a practice round wherein the body has an axial cavity formed centrally in the base end thereof and a cushioning structure disposed in the cavity.
The invention consists of certain novel features and a combination of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the details may be made without departing from the spirit, or sacrificing any of the advantages of the present invention.
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Bergin James S.
Poon Peter M.
Shaw Seyfarth
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