Mechanical guns and projectors – Projectile impelled by coacting wheels
Patent
1977-11-11
1980-04-15
Browne, William R.
Mechanical guns and projectors
Projectile impelled by coacting wheels
273260, 124 81, F41B 1500
Patent
active
041978277
ABSTRACT:
A baseball pitching machine includes a pair of adjacent ball engaging wheels each provided with a groove or concave surface formed in a body of an elastomeric material. As the baseball is received between the grooved wheels, the groove edges are laterally distorted, since the edges are unrestrained, to grip the baseball securely on opposite sides thereof and pitch the baseball in an accurately predetermined direction.
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"LD-167 A Liquid Urethane Elastomer Yielding Very Hard Vulcanizates"--Development Products Report No. 12 Oct. 1958 E. I. Du Pont de Nemours & Co. (Inc.). Wilmington 98, Del. _
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