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    • 49. 发明授权
    • Ball projecting device
    • 球投射装置
    • US4094294A
    • 1978-06-13
    • US764197
    • 1977-01-31
    • Richard Speer
    • Richard Speer
    • A63B69/40F41B11/02F41F1/04
    • A63B69/409F41B11/53
    • A ball projecting device is provided for propelling a ball pneumatically, wherein the speed of the ball projected is, at least in part, determined by utilizing a pneumatically operated, preferably variable, detent in the barrel of the device. The detent holds the ball within the barrel until a predetermined air pressure is built up behind the ball, which then causes the detent to quickly, almost immediately, collapse, permitting the ball to be projected out of the barrel.The invention further comprises a ball feeding mechanism, for feeding projectile balls to the barrel, the feeding mechanism comprising a rotating multi-apertured disk, rotating about an axis transverse to the horizontal and an overhanging ball guard device to prevent the blocking of the feed mechanism with a plurality of balls.
    • 提供球投射装置用于气动地推动球,其中投射的球的速度至少部分地通过利用装置的筒中的气动操作的,优选可变的棘爪来确定。 制动器将球保持在枪管内,直到在球后面形成预定的空气压力,其然后使制动器迅速地几乎立即倒塌,从而使球能够突出到枪管外。