| 摘要 |
An air driven ball return pitching apparatus that is unique in that the motor, when activated creates a vacuum zone on part of the system and a pressurized zone on the remainder of the system. The motor housing is equipped with a blower that acts upon the system through a Y connection in the pipe. When activated the blower forces air into the pressurized zone and creates the vacuum in that zone. The ball is pitched at the target of the back stop; the ball falls to the bottom which is graded to direct the ball to the return system. The vacuum acts upon the ball causing it to enter the return system and travel to the motor housing where it switches zones into the pressurized zone returning the ball to the pitching position for reuse.
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