Key for securing components of a drug delivery system during assembly and/or transport and methods of using same

  • US 10,420,880 B2
  • Filed: 04/30/2013
  • Issued: 09/24/2019
  • Est. Priority Date: 10/02/2007
  • Status: Active Grant
First Claim
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1. A system for preventing unintended linear extension of a telescoping portion of a drug delivery system, the system for preventing unintended linear extension comprising:

  • a telescoping assembly having a closed configuration and an extended configuration and an axis of linear telescoping movement, the telescoping assembly including at least a pushing nut screw and an internal screw in the closed configuration, the pushing nut screw and the internal screw being threadedly interconnected such that relative rotation between said pushing nut screw and said internal screw causes linear extension of said telescoping assembly to push fluid out of a cartridge injector, the pushing nut screw including a screw thread and the internal screw having a driver component applied thereto for rotating the internal screw; and

    ,an assembly key including a locking element removably installed on the telescoping assembly in the closed configuration,wherein the locking element of the assembly key, when the assembly key is installed on the telescoping assembly with the pushing nut screw and the internal screw threadedly interconnected, prevents relative rotation and linear telescoping movement of at least the pushing nut screw and the internal screw with respect to each other in the closed configuration, thereby preventing linear extension of the telescoping assembly in the closed configuration.

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