Mechanical guns and projectors – Fluid pressure
Patent
1977-03-29
1978-09-12
Pinkham, Richard C.
Mechanical guns and projectors
Fluid pressure
124 51R, 124 51A, 273 29R, F41F 104
Patent
active
041129113
ABSTRACT:
Apparatus that collects and transports generally spherical objects, such as tennis balls, and recycles them to a practice device that propels the balls to a tennis player for practice or recreation. Balls are fed one at a time to a chamber from whence they are metered to a transport device without jamming or bridging. Balls are fed or conveyed to a ball delivery zone by a pair of oppositely moving and aligned conveyor belts, each belt being located on opposite sides of the delivery zone. The delivery zone is of such dimensions that only one ball at a time can fall downwards thereinto. Located within the delivery zone is a horizontally reciprocating piston and oppositely opposed thereto and in alignment therewith is a ball exit port communicating with a vacuum tube leading to a pneumatic ball projector. As balls enter the delivery zone, they are fed through the exit port by the reciprocating cylinder and into the vacuum tube and served to a player by means of the projector.
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patent: 4021037 (1977-05-01), Torbet
Brown T.
Pinkham Richard C.
Shooting Star Tennis
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