A - Human Necessities – 63 – B
Patent
A - Human Necessities
63
B
273/175
A63B 41/00 (2006.01) A63B 39/04 (2006.01) F16K 15/14 (2006.01) F16K 15/20 (2006.01)
Patent
CA 1196353
TENNIS BALL ABSTRACT An improve tennis ball having an integrally molded valve in the sidewalls thereof for assuring constant pressure within the ball and, therefore, constant playing characteristics. 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 opened portion into wedged engagement with the passageaway through the wall of the ball containing the valve. As thus configured, increased internal pressure wedges the normally opened portion increasingly tightly into the passageway to provide a tight seal which is resistant to opening upon impact of the ball. The normally opened portion is provide with knife edges and a polished surface on the interior to provide leak-free sealing. The fabric covering of the tennis ball is made of a gas-permeable material disposed over the valve opening which is further protected by a gauze filter between the opening and the covering fabric. The ball can be pressurized to predictable bounce characteristics regardless of altitude and temperature by placing the ball within a sealed container at the play site and then reducing the volume of the container a fixed amount. Also, a method of making the valved tennis ball so as to preserve the automatic pressurization characteristics thereof. Two core halves are first prepared -- one having the valve molded therein. The interior sealing lips of the valve are then bonded together and the balance of the ball completed.
390946
Hoffman Allan C.
Smart & Biggar
LandOfFree
Tennis ball does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tennis ball, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tennis ball will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1299808