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In-line fluid transfer devices and ambulatory infusion devices including the same

  • US 8,372,041 B2
  • Filed: 05/08/2009
  • Issued: 02/12/2013
  • Est. Priority Date: 05/08/2009
  • Status: Active Grant
First Claim
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1. An infusion device, comprising:

  • a fluid transfer device includingan electromagnet including a coil having an inner-most diameter that defines an internal volume, a case defining an internal volume in which the coil is located, and a core having a fluid lumen, with an inlet and an outlet, extending therethrough, at least a portion of the core located within the internal volume defined by the case, anda piston that is movable relative to the core between a rest position and a pull-back position adjacent to the core and is biased to the rest position, the piston having a magnetic portion that is located within the volume defined by the inner-most diameter of the coil;

    an infusion device outlet operably connected to the fluid transfer device; and

    a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir.

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