Ammunition and explosives – Projectiles – Dumdum or mushrooming
Reexamination Certificate
1999-07-26
2001-06-12
Tudor, Harold J. (Department: 3641)
Ammunition and explosives
Projectiles
Dumdum or mushrooming
C102S501000
Reexamination Certificate
active
06244186
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to ammunition and in particular to pellets for compressed gas powered weapons, especially air rifles or air guns.
BACKGROUND OF THE INVENTION
Air gun pellets have either been designed for deep penetration or for “mushrooming” upon impact The two designs have opposite objectives and have entirely different effects. Pellets designed for deep penetration typically have pointed tips to drive the pellet deeper into the target. Pellets that are designed to mushroom open upon impact typically have a cup-shaped head which spreads open upon impact with the target. Mushrooming defines the deformation radially outwardly and subsequently towards the back of portions of the head of the pellet. Both designs have their advantages and disadvantages with respect to hunting.
Deep penetrating pellets drive further into the body of an animal but do not cause much damage with the result that. unless a vital organ or structure is hit, the animal is not struck down and thus, can escape. Cup headed pellets are designed for mushrooming spread open in the body, but do not penetrate deep enough into the body to damage major organs. They operate on a shock wave principle and may strike down an animal, but not permanently so that again the animal may escape.
It is not desirable when hunting to only wound an animal and permit the wounded animal to escape, since this will not only result in loss of the animal, but will expose it to prolonged suffering. Thus, the effectiveness of both penetrating and mushrooming pellets requires improvement. Hence, the need for a pellet which will not only penetrate deep into the animals body but also cause serious damage to vital organs.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a pellet for a weapon powered by compressed gas such as air, the pellet having a head for both high impact and penetration into the target.
This is achieved with a pellet for a compressed gas powered weapon including a pellet head having a circumferential rim with means for promoting sectioning of the rim and mushrooming on impact and a central penetration point. The pellet is designed so that the rim will spread open on impact and mushroom while the central point will provide penetration into the target, resulting in a larger and longer wound channel.
The pellets are preferably made of a relatively soft material which will allow for easy mushrooming upon impact, such as fead.
REFERENCES:
patent: D. 231447 (1974-04-01), Abbott
patent: 3557656 (1971-01-01), Precoul
patent: 3881421 (1975-05-01), Burczynski
patent: 4005660 (1977-02-01), Pichard
patent: 4048922 (1977-09-01), Buljovcic
patent: 4136616 (1979-01-01), Schirneker
patent: 4413564 (1983-11-01), Brown
patent: 4979443 (1990-12-01), Rittel et al.
patent: 5175389 (1992-12-01), Kramer et al.
patent: 5185495 (1993-02-01), Petrovich et al.
patent: 5339743 (1994-08-01), Scarlata
patent: 5385100 (1995-01-01), Crozine et al.
patent: 5471719 (1995-12-01), Sawyers
patent: 5515787 (1996-05-01), Middleton
patent: 614316 (1978-07-01), None
patent: WO 97/40334 (1997-10-01), None
Tudor Harold J.
Varnum Riddering Schmidt Howlett LLP
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