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Liquid drug cartridges and associated dispenser

  • US 10,307,550 B2
  • Filed: 06/05/2015
  • Issued: 06/04/2019
  • Est. Priority Date: 06/09/2014
  • Status: Active Grant
First Claim
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1. A liquid drug cartridge, comprising:

  • a container configured to store a liquid drug;

    an end cap coupled with a first end of the container, the end cap having an ejection opening from which a volume of the liquid drug from the container can be selectively ejected;

    a removable cap configured to interface with the end cap such that the ejection opening is closed by the removable cap so as to block flow of the liquid drug through the ejection opening any time the removable cap is coupled with the end cap;

    a filter element positioned between the container and the ejection opening, the filter element being configured to filter the liquid drug prior to ejection from the ejection opening;

    a check valve disposed between the end cap and the container and configured to permit only one-way flow in an outward direction from the container to the ejection opening to block microbial ingress into the container from the ejection opening; and

    a piston that extends an entire distance between opposing sidewalls of the container, the piston being solid so as to prevent the liquid drug from passing through and/or beyond the piston, the piston sealing a second end of the container that is spaced apart from the first end, the piston being repositionable relative to the container so as to selectively eject a volume of the liquid drug from the container via the ejection opening.

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