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Injection apparatus

  • US 5,993,412 A
  • Filed: 05/19/1997
  • Issued: 11/30/1999
  • Est. Priority Date: 05/19/1997
  • Status: Expired due to Fees
First Claim
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1. A needleless injector comprising:

  • a needleless syringe installed in the injector for holding medication prior to injection, the syringe including an injection aperture at a forward end thereof;

    a syringe plunger slidably mounted to a rear end of the syringe for forcing medication out of the syringe aperture;

    a syringe plunger drive mechanism providing power to drive the syringe plunger and thereby force medication out of the syringe;

    a drive control mechanism for controlling the operation of the drive mechanism, the drive control mechanism including a warning system which warns the user if any one of a plurality of pre-injection conditions is not met, an interlock system which prevents injection from taking place if any one of the plurality of pre-injection conditions are not met, and a sensing system which senses whether the plurality of pre-injection conditions is not met and conveys a signal to the warning and interlock systems informing as to whether all of the pre-injection conditions are met.

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