Power plants – Pressure fluid source and motor – Pneumatic motor with gas supply or removal device
Reexamination Certificate
1997-08-04
2001-05-22
Nguyen, Hoang (Department: 3748)
Power plants
Pressure fluid source and motor
Pneumatic motor with gas supply or removal device
C091S433000, C124S073000, C124S072000, C124S074000
Reexamination Certificate
active
06233928
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to paint ball guns and more particularly to an improved paint ball gun and an improved rotary breech, regulator, control valve, power piston and power valve assemblies for utilization therein.
Numerous types of paint ball guns have been developed for utilization in various manners, such as in simulated war games. These paint ball guns generally include a CO
2
cartridge or cylinder which is utilized as the power source to propel paint balls, generally at a specified velocity, such as three hundred (300) feet per second. In general, the prior art paint ball guns include a typical firearm type mechanism including a bolt, spring and cocking handle. This standard configuration is not conducive to efficient operation of the paint ball guns.
These prior art paint ball guns generally do not operate at low ambient temperatures below about forty (40) degrees Fahrenheit. These paint ball guns have metal or metallic moving parts which require lubrication and preventive maintenance. The bolt type mechanism also leads to breakage of the paint balls themselves. The prior art paint ball guns generally do not include pressure regulators. One prior art paint ball gun includes a regulator which is of a conventional configuration including a heavy main spring adjusted by a screw bearing against the spring. If the screw is removed while the paint ball gun is under pressure, the regulator can be ejected under pressure causing potential injury.
It therefore would be desirable to provide an improved paint ball gun which eliminates lubricants and metal on metal surfaces, has pressure regulation and which will operate consistently and at low ambient temperatures. Further it also would be desirable to provide an improved rotary breech, regulator, control valve, power piston and power valve assemblies for utilization in paint ball guns and in other devices.
SUMMARY OF THE INVENTION
The present invention provides an improved paint ball gun which operates consistently, at low temperatures and is easily regulated. The moving parts of the paint ball gun do not have metal to metal surfaces and hence eliminate lubrication. The paint ball gun includes a pressure regulator and also operates at low gas operating pressures with minimal damage to the paint balls themselves. The paint ball gun has a rotary breech to eliminate the prior art bolts and spring assemblies. The improved paint ball gun rotary breech, regulator, control valve, power piston and power valve assemblies can be utilized in paint ball guns separately or together or in other type devices.
REFERENCES:
patent: 5265582 (1993-11-01), Bhogal
patent: 5280778 (1994-01-01), Kotsiopoulos
patent: 5494024 (1996-02-01), Scott
patent: 5669369 (1997-09-01), Scott
Friedland Norman
Nguyen Hoang
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