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Self-sealing injection button and method of making same

  • US 4,428,364 A
  • Filed: 07/16/1982
  • Issued: 01/31/1984
  • Est. Priority Date: 04/11/1979
  • Status: Expired due to Fees
First Claim
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1. A self-sealing injection button adapted to be pierced by a hypodermic needle, said injection button comprising a unitary body of cured silicone rubber swollen with a swelling agent which is nonvolatile under atmospheric conditions, and a restraining means for preventing the swollen silicone rubber from occupying the volume it would ordinarily occupy in the absence of the restraining means to provide and maintain compressive forces within the silicone rubber for sealing punctures, said restraining means comprising multiple parallel layers of fabric oriented in more than one weave direction, said layers being impregnated with and in intimate contact with the silicone rubber.

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