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Automatic injection devices

  • US 9,017,287 B2
  • Filed: 12/17/2013
  • Issued: 04/28/2015
  • Est. Priority Date: 06/23/2004
  • Status: Active Grant
First Claim
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1. A syringe plunger, comprising:

  • an upper solid portion having a circular cross-sectional profile;

    a lower solid portion having a distal end operable to move a bung and to transmit an expulsion force thereto, the lower solid portion having a circular cross-sectional profile and a first circular circumference; and

    a projecting portion comprising two flexible elbows on either side of a central void extending along a central axis of the plunger between the upper and lower solid portions, wherein the flexible elbows project outwardly from the central void when the projecting portion is in a first projecting position, and wherein the flexible elbows are inwardly collapsible toward the central void to fit within the first circular circumference when the projecting portion is in a second collapsed position.

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