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Solid blunt for a needle assembly

  • US 6,676,636 B2
  • Filed: 03/13/2002
  • Issued: 01/13/2004
  • Est. Priority Date: 12/23/1998
  • Status: Expired due to Term
First Claim
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1. A needle assembly comprising:

  • a cannula having an inner wall which defines an inner dimension and a sharp tip;

    a solid blunt disposed within said cannula, the solid blunt having an outer dimension which is nearly equal to the inner dimension of the cannula, wherein solid blunt has at least a first position and a second position, the first position has the solid blunt disposed entirely within a cannula of a needle, and the second position has the solid blunt advanced sufficiently to extend a tip of the blunt beyond an opening in the cannula and the solid blunt substantially blocks fluid flow in a first space defined by a circumferential portion of the inner wall and allows fluid flow in a second space defined by the circumferential portion of the inner wall in either position.

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