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Hypodermic needle with protective sheath

  • US 5,147,327 A
  • Filed: 08/01/1991
  • Issued: 09/15/1992
  • Est. Priority Date: 01/10/1990
  • Status: Expired due to Fees
First Claim
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1. A sheathed hypodermic needle comprisinga tubular fluid handling needle having a front end adapted for hypodermic penetration and a rear end adapted for connection to fluid ejection or withdrawal means,protrusions on the exterior forward portion of said needle formed by flattening a portion of said needle near its front end to cause a portion of the needle exterior diameter to protrude outward sufficient to frictionally engage the interior of said sheath while allowing unobstructed fluid flow through the needle interior,a retractable sheath slidably mounted on said needle and movable relative thereto between a rearward retracted position exposing the front end of said needle and a forward protective position enclosing the front end of said needle to prevent inadvertent injury by contact with said needle and to facilitate disposal of said needle,the interior of said sheath adapted to frictionally engage said protrusions in said forward protective position and cover the front end of said needle.

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