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Catheter having polymer stiffener rings and method of making the same

  • US 7,815,975 B2
  • Filed: 06/25/2004
  • Issued: 10/19/2010
  • Est. Priority Date: 06/25/2003
  • Status: Expired due to Fees
First Claim
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1. A method of making a catheter, comprising the steps of:

  • providing an inner tubular member of a soft, flexible polymer material; and

    spraying a hard polymer material on an outer surface of said tubular member to form a plurality of hard polymer rings on said outer surface of said inner tubular member at spaced locations along a length of the tubular member, said hard polymer material having a hardness greater than said soft, flexible polymer material to provide resistance to crushing and kinking, wherein said hard polymer rings are formed concentric with the tubular member and are completely separated from each other.

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