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Cannula with protection cap for medical infusion lines and the like

  • US 7,247,153 B2
  • Filed: 07/25/2003
  • Issued: 07/24/2007
  • Est. Priority Date: 07/26/2002
  • Status: Active Grant
First Claim
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1. A cannula (1) having a protection cap (2) for a medical infusion line, said cannula comprising a hollow body (3) defining at a first end (6) a female luer lock connector (4-5) adapted to be mated with a male luer lock connector and bearing at a second end an axial tubular ferrule (7), said hollow body (3) having an outer surface formed with lateral teeth (9), and said protection cap (2) having an inner surface formed with complementary lateral teeth (12), wherein said protection cap (2) is configured to be removably applied onto said hollow body (3) to enclose said tubular ferrule (7) with said lateral teeth (9, 12) of said hollow body (3) and said cap (2) is configured to be mutually coupled torsionally for a first direction of rotation corresponding to unscrewing said female leur lock connector (4-5) from said male leur lock connector, and wherein said outer surface of said hollow body (3) and said inner surface of said protection cap (2) are both cylindrical and said lateral teeth (9, 12) of said hollow body (3) and cap (2) have respective included sides configured to torsionally couple said protection cap (2) and said hollow body (3) in a second direction of rotation opposite to said first direction until a predetermined torque is reached and providing axial disengagement of said cap (2) relative to said cannula (1) when said predetermined torque is reached.

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