<p>A barrel (14) for a gas powered ball machine of the type used to simulate balls propelled whilst playing ball sports, especially those machines used to propel balls with a raised seam, such as a baseball or softball. The barrel (14) has one or more openings (16) along its cylindrical length that allow expanding gas to escape as a ball is fired from the machine. The openings (16) assist in predicting the pressure and volume of gas required to repeatedly propel a ball at a predetermined speed from the ball machine.</p>
申请公布号
WO2006089345(A1)
申请公布日期
2006.08.31
申请号
WO2006AU00062
申请日期
2006.01.20
申请人
REALISTIC PITCHING MACHINES PTY LTD;KELLY, HAYDN;BRODRICK, COLIN