A - Human Necessities – 63 – B
Patent
A - Human Necessities
63
B
226/7
A63B 41/12 (2006.01) A63B 39/04 (2006.01)
Patent
CA 1066242
TECHNIQUE FOR PRESSURIZING A SEALED ARTICLE ABSTRACT OF THE DISCLOSURE A technique for controlling the pressure in a closed, sealed article, such as a tennis ball or the like. A needle having a sharp, forward, outer end adapted to puncture the article includes a passage in its rear end which communicates with a flow orifice in the side of the needle, between the ends of the needle. Means are pro- vided at the outer end of the needle to carry a resilient sealing plug. The sealing plug may be a separate plug element attached to the tip of the needle before the needle punctures the article of the plug may be cut di- rectly from the article wall as the sharp forward end of the needle advances through the wall. The article is punctured by the needle to expose the flow orifice in- teriorly of the article and to locate the plug within the article. The needle may be attached to a syringe or other appropriate means for injecting or withdrawing air from the article. Air is introduced or withdrawn from the article as desired. When the desired pressure level is reached, the needle is withdrawn. The needle and plug are arranged so that as the needle is withdrawn, the wall of the article engages the plug frictionally to hold it in the hole and effect a seal after the needle is completely withdrawn.
260480
Desatnick Allen H.
Wasserman George J.
Desatnick Allen H.
Wasserman George J.
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