Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1978-04-10
1980-12-23
Marlo, George J.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
273 65D, 273 61D, 137846, 152349, 152427, F16K 1516, A63B 3904
Patent
active
042406307
ABSTRACT:
An improved check valve is disclosed primarily for use in game balls such as tennis balls, racquet balls, footballs, basketballs, and the like. The valve is adapted for molding into the shell of the game ball upon initial manufacture or for insertion therein as part of a valve insert subsequent to manufacture. The valve is characterized by being of unitary construction and having a normally open and a normally closed portion. The valve is constructed of a tapered deformable elastomeric material such that the normally closed portion seals the ball against low initial internal pressures sufficiently to allow the internal pressure within the ball to deform the normally open portion into wedged engagement with the passageway through the wall of the ball. As thus configured, increased internal pressure wedges the normally open portion increasingly tightly into the passageway to provide a tight seal which is resistant to opening upon impact of the ball. The normally open portion is provided with knife edges and a polished surface on the interior to provide leak-free sealing.
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