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Method of producing tapered or pointed cannula

  • US 7,076,987 B2
  • Filed: 08/05/2004
  • Issued: 07/18/2006
  • Est. Priority Date: 08/05/2004
  • Status: Active Grant
First Claim
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1. A method of producing a pointed cannula, comprising:

  • providing a tubular stock having an axial passage;

    heating the tubular stock at a first heating location to form a softened section, the softened section separating a workplace portion of the tubular stock from a remaining portion of the tubular stock;

    heating the tubular stock at a second heating location, the second heating location being offset from the first heating location along a longitudinal direction of the tubular stock; and

    drawing the workpiece portion away from the remaining portion to elongate the softened section and separate the workpiece portion from the remaining portion to form the tubular device,wherein the drawing separates the workpiece portion from the remaining portion at a beveled angle of between about 10°

    to about 45°

    with respect to a longitudinal axis of the tubular stock.

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