| 摘要 |
A portable baseball throwing device that is treadle-cocked and trigger releasable. The device further has an adjustable tension spring which serves to actuate a throwing arm which is cocked when the aforementioned treadle is depressed to that a depending foot on the treadle contacts the ground. The throwing arm is channel-shaped with an adjustable ball stop positioned across the channel and further with a frictional rub strip attached to each wall of the channel for accurate positioning of a baseball. For this same reason, the ball chute feeding the throwing arm has finger slots in it. The throwing arm is surrounded by a cage to protect the user of the device.
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