Retractable hypodermic needle

  • US 7,465,294 B1
  • Filed: 12/15/2004
  • Issued: 12/16/2008
  • Est. Priority Date: 05/19/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A retractable hypodermic needle assembly comprising:

  • a body, said body having a needle end and an attachment end, an attachment structure on the attachment end of said body for attachment to a device which handles biologically-active materials, said attachment structure comprising a Luer lock structure for engaging a Luer lock on a device for handling biological fluids and a cavity in said body for receiving the nozzle of said Luer lock;

    a tubular needle sheath on the needle end of said body, a tubular hypodermic needle having a fluid passage therethrough, said hypodermic needle being slidably mounted in said needle sheath from a first position where said needle does not extend from said needle sheath to a second position wherein said needle extends from said needle sheath said body having no biologically active material space except in said needle passage;

    a compression spring interengaged between said needle and said body to urge said needle towards said first position; and

    a seal structure within said cavity in said body for sealing said needle with respect to a device for handling biologically active fluids.

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