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Hypodermic needle and method of making needles

  • US 4,383,530 A
  • Filed: 06/05/1981
  • Issued: 05/17/1983
  • Est. Priority Date: 06/05/1981
  • Status: Expired due to Fees
First Claim
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1. An improved needle structure for use with hypodermic needle assemblies and the like, having a generally hollow tubular needle which is beveled at one end to provide a generally truncated cylindrical leading tip segment with a relatively sharp point at its tip and which has a relatively straight portion with a straight axis therethrough, wherein the improvement comprises:

  • a generally arcuate portion behind said leading tip, said arcuate portion having a generally arcuate axis which diverges from the straight axis of the needle but curves back in a direction towards the straight axis in a generally bulge-like configuration to incline said leading tip segment at a relatively small angle relative to the straight axis of the needle to shield, at least partially, its hollow interior for reducing the amount of tissue that would otherwise enter the hollow needle interior while said needle is penetrating such tissue, such that tissue trauma associated with penetration into the tissue is substantially reduced.

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