Mechanical guns and projectors – Fluid pressure – With control for discharge of fluid pressure
Reexamination Certificate
1999-07-30
2001-04-24
Poon, Peter M. (Department: 3643)
Mechanical guns and projectors
Fluid pressure
With control for discharge of fluid pressure
C124S060000, C124S065000, C124S069000, C124S075000
Reexamination Certificate
active
06220237
ABSTRACT:
TECHNICAL FIELD
This invention relates to compressed air guns, and specifically to compressed air toy guns which fire a succession of projectiles.
BACKGROUND OF THE INVENTION
Toy guns which shoot or launch projectiles have been very popular for many years. These guns have been designed to launch projectiles in a number of ways. A common method of launching has been by the compression of a spring which propels the projectile upon its decompression or release, as, for example, with BB guns and dart guns. These guns however usually do not generate enough force to launch projectiles with great velocity.
Toy guns have also been designed which use compressed air to launch projectiles such as foam darts or balls. These types of guns use a reciprocating air pump to pressurize air within a pressure tank. In use, a single dart is loaded and the pump is typically reciprocated several times with each firing of the gun. Therefore, the gun must be loaded and pumped with each firing as it is not capable of firing several darts in rapid sequence. The rapid firing of a gun may be desired for those playing a mock war or other type of competition.
Today children who play mock wars often carry several guns at one time in order to fire several shots simultaneously or in rapid succession or carry a gun which is capable to firing several shots. Guns which may fire several shots in rapid succession typically include a magazine which holds the projectiles. However, the transfer of the projectiles from the magazine to the breach of the gun has been difficult to accomplish, especially wherein the projectiles are made of a soft, pliable material. The difficulty with the transfer of soft projectiles and the like has been the inherent tendency to deform under force rather than being guided by a force. As such, the projectiles often become stuck within the transfer mechanism or within the breach itself.
Accordingly, it is seen that a need remains for a toy air gun which may be fire a succession of projectiles from a magazine without the projectiles becoming lodged during the transfer between the magazine and the breach mechanism. It is to the provision of such therefore that the present invention is primarily directed.
SUMMARY OF THE INVENTION
In a preferred form of the invention a gun adapted to launch a projectile comprises an elongated launch tube having an longitudinal axis and sized and shaped to receive a projectile. The gun also has a moveable seal mounted within the interior of the launch tube sized and shaped to sealably engage a first portion of the projectile positioned within the launch tube and a stationary seal positioned within the interior of the launch tube adapted to engage a second portion of the projectile generally opposite the first portion. The stationary seal is adapted to allow reciprocal movement of the launch tube relative to the stationary seal while maintaining sealing engagement between the stationary seal and the launch tube. The launch tube, moveable seal and stationary seal define a firing chamber. The launch tube is moveable between a loading position and a firing position so as to vary the distance between the moveable seal and the stationary seal along the longitudinal axis of the launch tube to cause the moveable seal to sealably engage the projectile and capture the projectile between the moveable and stationary seals. The gun also includes means for providing a supply of compressed air to the firing chamber for launching the projectile from the launch tube. With this construction, the projectile is captured between the seals through relative movement of the moveable and stationary seals to each other which ensures sealing engagement of the projectile with the moveable seal during the transfer of compressed air into the firing chamber.
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Applewhite John T.
Johnson Lonnie G.
Matthews Jeffrey Shane
Baker, Donelson Bearman & Caldwell
Bergin James S.
Johnson Research & Development & Company, Inc.
Poon Peter M.
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