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Injector for a subcutaneous infusion set

  • US 5,851,197 A
  • Filed: 02/05/1997
  • Issued: 12/22/1998
  • Est. Priority Date: 02/05/1997
  • Status: Expired due to Term
First Claim
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1. An injector for transcutaneously placing a medical needle through the skin of a patient, comprising:

  • a barrel having an elongated bore formed therein;

    a plunger slidably received within said barrel for movement between an advanced position and a retracted position, said plunger including means for receiving and supporting the medical needle in a position for transcutaneous placement upon movement of said plunger from said retracted position to said advanced position;

    spring means for urging said plunger toward said advanced position; and

    trigger means for releasibly retaining said plunger in said retracted position, said trigger means being operable to release said plunger for spring-loaded movement with a controlled force and speed toward said advanced position;

    said means for receiving and supporting the medical needle including safety retainer means for retaining the medical needle on said plunger when said plunger is moved from said retracted position to said advanced position, said retainer means permitting separation of the medical needle from said plunger when said plunger is in the advanced position.

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