Mechanical guns and projectors – Fluid pressure – With control for discharge of fluid pressure
Reexamination Certificate
2000-03-15
2001-11-06
Poon, Peter M. (Department: 3643)
Mechanical guns and projectors
Fluid pressure
With control for discharge of fluid pressure
C124S074000
Reexamination Certificate
active
06311683
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a gas rifle (air rifle) which is generally used for hunting, and more particularly, the present invention relates to a device for assembling and disassembling a gas rifle and a gas tank to and from each other, which enables the gas tank to be easily disassembled from the gas rifle when storing the gas rifle in a place and taking the gas tank for gas recharging, thereby improving a user's convenience and increasing a safety factor upon handling the gas rifle and the gas tank.
2. Description of the Related Art
Generally, a gas rifle refers to a gun which propels a projectile using compressed gas which is charged into a gas tank. A projectile which is used in a gas rifle, is divided into a single bullet type projectile and shrapnel type projectiles.
A single bullet type projectile has a diameter of about 4.5 mm-5.5 mm and is propelled singularly. Shrapnel type projectiles are a plurality of small-sized pellets which are contained in a cartridge. The plurality of small-sized pellets are simultaneously and distributedly propelled as one end of the cartridge is opened.
Regardless of a type of a projectile, a projectile is propelled from the same rifle. In other words, projectiles are divided merely by a use thereof. The projectiles are propelled by discharging pressure of a quantity of compressed gas which is momentarily discharged from a gas tank upon actuation of a trigger mechanism of a gas rifle.
However, a conventional gas tank which is used in a gas rifle, suffers from defects in that, since the conventional gas tank is constructed in a manner such that it cannot be easily disassembled from the gas rifle except when the gas rifle is to be carried by parts or is to be repaired, inconvenience is caused due to its weight and/or its outer appearance. Furthermore, when compressed gas is ultimately depleted, the gas rifle must be moved to a gas charging station in a state wherein the gas tank is attached thereto. Therefore, when moving the gas rifle, a sensation of fear can be roused in others, and an accidental firing can occur.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and an object of the present invention is to provide a device for assembling and disassembling a gas rifle and a gas tank to and from each other, which enables the gas tank to be easily disassembled from the gas rifle when storing the gas rifle in a place and taking the gas tank for gas recharging, thereby improving a user's convenience, contributing to the extension of a lifetime of the gas rifle, not rousing in others a sensation of fear, and preventing accidental firing from occurring, when storing and moving the gas rifle.
In order to achieve the above object, according to the present invention, there is provided a device for assembling and disassembling a gas rifle and a gas tank to and from each other, respectively, the device comprising: a gas tank having a rear cap, the rear cap being formed with a fixing pin hole and having a one-touch type connection pipe, the one-touch type connection pipe having an inclined surface at a distal end thereof and a circumferential bearing groove, the rear cap further having an adjusting valve for adjusting a gas discharging amount of the gas tank; a gas discharging pipe having a fixing pin which is inserted into the fixing pin hole of the rear cap to prevent the gas tank from fluctuating; a fixed pipe secured to the gas discharging pipe and having a plurality of holes which are formed in a manner such that they are spaced apart one from another in a circumferential direction, the fixed pipe further having a plurality of balls which are fitted into the plurality of holes, respectively, the plurality of balls constituting a sliding ball bearing and being able to be moved between a retracted position and a projected position, the plurality of balls being engaged into the circumferential bearing groove of the one-touch type connection pipe at the retracted position and being disengaged from the circumferential bearing groove of the one-touch type connection pipe at the projected position; a control pipe for controlling the movement of the plurality of balls between the retracted position and the projected position, thereby to allow the gas tank to be assembled to the gas discharging pipe when the plurality of balls are in the retracted position and to be disassembled from the gas discharging pipe when the plurality of balls are in the projected position; a contact valve being brought into close contact with the inclined surface of the one-touch type connection pipe when the gas tank is assembled to the gas discharging pipe and being detached from the inclined surface of the one-touch type connection pipe when the gas tank is disassembled from the gas discharging pipe; a first spring for biasing forward the control pipe; and a second spring for biasing forward the fixed pipe.
REFERENCES:
patent: 3761117 (1973-09-01), Shendure
patent: 4060219 (1977-11-01), Crawford
patent: 4664420 (1987-05-01), Demeri
patent: 4819609 (1989-04-01), Tippmann
patent: 5755213 (1998-05-01), Gardner, Jr. et al.
patent: 5950611 (1999-09-01), Lopez et al.
Agris Cheryl H.
Jakel Kevin
Poon Peter M.
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