| 摘要 |
A pitching machine accessory for modifying an existing pitching machine. The existing pitching machine having a pitching apparatus mounted on a sleeve rotatably attached to a shaft and the shaft is connected to a stand. The accessory includes a base rigidly attached to the shaft, a turning means mounted on the base and a gear assembly attached to the turning means. The gear assembly is also attached to the sleeve, whereby the turning means causes the gear assembly to move the sleeve laterally in relation to the stand.
|
