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Patch-Sized Fluid Delivery Systems and Methods

  • US 20140114282A1
  • Filed: 12/23/2013
  • Published: 04/24/2014
  • Est. Priority Date: 02/09/2006
  • Status: Active Grant
First Claim
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1. A method for delivering an infusion medium to a user, the method comprising:

  • providing a first housing portion and a second housing portion;

    providing the first housing portion and the second housing portion with connection structure to allow the first housing portion and the second housing portion to be selectively engaged with each other for operation and disengaged from each other to allow disposal of the first housing portion without disposing of the second housing portion;

    supporting a drive shaft with the second housing portion, for movement in a generally linear dimension;

    operatively connecting a drive device to the drive shaft, to selectively move the drive shaft in the generally linear dimension;

    supporting a pump housing with the first housing portion, the pump housing having a piston channel having a generally linear, longitudinal axis;

    providing an inlet port extending to the piston channel and configured for connection to a source of fluidic medium;

    providing an outlet port in fluid flow communication with the piston channel;

    providing a piston having a surface for receiving a drive force from the drive shaft when the first housing portion and the second housing portion are engaged for operation; and

    supporting the piston in the piston channel for movement along the longitudinal axis of the piston channel between fill and dispense positions upon receiving a force from a drive shaft, such that;

    in the fill position, the piston is moved to a position to allow fluid flow communication through the inlet port and into the piston channel and piston chamber; and

    in the dispense position, the piston is moved to a position to obstruct fluid flow communication through the inlet port and to reduce the volume of the piston chamber to force fluid in the piston chamber out of the outlet port.

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