Mechanical guns and projectors – Fluid pressure – With control for discharge of fluid pressure
Patent
1998-10-19
2000-07-11
Swiatek, Robert P.
Mechanical guns and projectors
Fluid pressure
With control for discharge of fluid pressure
124 73, F41B 1126
Patent
active
060857358
ABSTRACT:
A computerized device for propelling tennis balls by pneumatic pressure. The device contains a support pad to protect the tennis court. There is a by-pass valve which, when open, allows the blower for the pneumatic system to blow continuously, thereby avoiding carbon deposits. There is a pressure tank for the build-up of pressure for the pneumatic system when the by-pass valve is closed. Course and fine pressure valves are used to control the pressure in the pressure tank within narrow limits. A hopper contains pushers which prohibit balls accumulating in areas of little motion. A carousel advances only when a ball can drop freely into the ball outlet tube. A cover over the feeder point prevents balls in the hopper from interfering with the ball in the feeder point. The ball is held in an injection area until forced through a flap door into the pressure tank and a guide channel. The injection area contains a solenoid-controlled sweep arm which controls a injector which forces the ball through the flap door. The ball is held in the barrel by impeders until a solenoid releases the impeders through a sliding sleeve. Thus, timing of the release can be controlled by computers within narrow limits. A computer-controlled spin plate can impart spin and curve properties to the ball. Computerized lateral and vertical aiming mechanisms result in concise placement of the ball. The device is suitable for training, testing and recreational purposes and is capable of simulating an actual tennis game.
REFERENCES:
patent: 3917265 (1975-11-01), Schrier et al.
patent: 4046131 (1977-09-01), Clark et al.
patent: 4372283 (1983-02-01), Balka, Jr.
Huff Richard L
Swiatek Robert P.
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