Tennis Ball pitching apparatus with anti-jamming ball feed mecha

Details Tennis Ball pitching apparatus with anti-jamming ball feed mecha Tennis Ball pitching apparatus with anti-jamming ball feed mecha

1976-08-05

1977-11-22

Pinkham, Richard C.

Mechanical guns and projectors

Miscellaneous

124 51R, 124 49, F41B 1500

Patent

active

RE0294799

ABSTRACT:
Apparatus for propelling tennis balls at timed intervals from a storage hopper. The hopper has the configuration of an inverted truncated cone. At the base of the cone and in a position to receive balls from the cone, is a rotating ball selector. The ball selector is driven through a clutch which disengages at a predetermined torque. Upon disengagement, the clutch permits the drive to rotate for approximately one-half revolution without transmitting any torque to the ball selector, and then induces a partial counter-rotation or reverse motion of the ball selector by the action of a spring loaded pin engaging an inclined face on a clutch cam.

REFERENCES:
patent: 808856 (1906-01-01), Melton
patent: 2716973 (1955-09-01), Desi
patent: 3298569 (1967-01-01), Weitzman
patent: 3421491 (1969-01-01), Brown

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