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Syringe type pump

  • US 10,117,989 B2
  • Filed: 06/15/2015
  • Issued: 11/06/2018
  • Est. Priority Date: 10/11/2010
  • Status: Active Grant
First Claim
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1. A device for subcutaneous injection of fluid into a patient'"'"'s skin, comprising:

  • a casing to house a pump;

    a cannula having a tip for insertion into the patient'"'"'s skin, the cannula being fixed in a position relative to the pump;

    a flexible base plate, the base plate fixed to the casing and including (1) a pre-stressed convex position in which the tip of the cannula is concealed, and (2) a released flat position in which the tip of the cannula is exposed beyond the base plate; and

    an adhesive layer fixed to a central region of the flexible base plate and extending without interruption towards an outer portion of the flexible base plate to adhere the base plate onto the patient'"'"'s skin,wherein when moving from the pre-stressed convex position to the released flat position, a portion of the base plate which is moving pulls the skin which is adhered to the base plate so that the patient'"'"'s skin moves against and is pierced by the tip of the cannula,wherein when the device is in (1) the pre-stressed convex position, a tip of the cannula is contained within the device,wherein when the device is in (2) the released flat position, the tip of the cannula is exposed beyond the baseplate, andwherein as the device transitions from (1) the pre-stressed convex position to (2) the released flat position, the cannula moves from being contained within the device to being exposed beyond the base plate such that a tip of the cannula is outside of the device.

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