Pressure vented fluid reservoir for a fluid infusion device
First Claim
1. A fluid infusion device that delivers a medication fluid to a body, the fluid infusion device comprising:
- a base plate;
a hollow fluid delivery needle coupled to the base plate to provide a fluid flow path for the medication fluid;
a sealing element coupled to the base plate and overlying at least a portion of the hollow fluid delivery needle, the sealing element comprising;
a base section;
a tip section extending from the base section; and
a retractable body section between the base section and the tip section; and
a fluid reservoir comprising;
a main body section that defines a fluid chamber for the medication fluid;
a fluid delivery port coupled to and extending from the main body section, the fluid delivery port comprising a fluid conduit and a pressure vent defined therein;
a funnel element associated with the fluid delivery port, wherein the pressure vent is formed in the funnel element; and
a septum located in the fluid delivery port and having a nominal non-pierced state forming a fluid seal within the fluid conduit;
wherein the pressure vent provides a venting conduit from inside the fluid chamber to outside the fluid chamber; and
wherein the pressure vent terminates at an exterior surface of the fluid delivery port, the exterior surface contoured to mate with a resilient sealing element of the fluid infusion device to seal the pressure vent.
1 Assignment
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Accused Products
Abstract
Disclosed herein is a fluid infusion device of the type that delivers medication fluid to the body of a patient. The device includes or cooperates with a fluid reservoir, and the device has a sealing assembly to receive and form a fluid seal with the fluid reservoir. A retractable sealing element surrounding a hollow fluid delivery needle may be used to seal a port of the fluid reservoir. The port may include a pressure vent that is sealed by the retractable sealing element. In one variation, the reservoir includes a moving valve sleeve that holds a septum. The septum moves to allow the reservoir to vent, and to form a seal with the port when the needle pierces the septum. In another variation, the device includes a needleless sealing assembly. In yet other variations, the device uses a needled fluid reservoir.
252 Citations
11 Claims
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1. A fluid infusion device that delivers a medication fluid to a body, the fluid infusion device comprising:
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a base plate; a hollow fluid delivery needle coupled to the base plate to provide a fluid flow path for the medication fluid; a sealing element coupled to the base plate and overlying at least a portion of the hollow fluid delivery needle, the sealing element comprising; a base section; a tip section extending from the base section; and a retractable body section between the base section and the tip section; and a fluid reservoir comprising; a main body section that defines a fluid chamber for the medication fluid; a fluid delivery port coupled to and extending from the main body section, the fluid delivery port comprising a fluid conduit and a pressure vent defined therein; a funnel element associated with the fluid delivery port, wherein the pressure vent is formed in the funnel element; and a septum located in the fluid delivery port and having a nominal non-pierced state forming a fluid seal within the fluid conduit; wherein the pressure vent provides a venting conduit from inside the fluid chamber to outside the fluid chamber; and wherein the pressure vent terminates at an exterior surface of the fluid delivery port, the exterior surface contoured to mate with a resilient sealing element of the fluid infusion device to seal the pressure vent. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fluid reservoir for a fluid infusion device that delivers a medication fluid to a body, the fluid reservoir comprising:
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a main body section that defines a fluid chamber for the medication fluid; a fluid delivery port coupled to and extending from the main body section, the fluid delivery port comprising a fluid conduit and a pressure vent defined therein; a funnel element associated with the fluid delivery port, wherein the pressure vent is formed in the funnel element; and a septum located in the fluid delivery port and having a nominal non-pierced state forming a fluid seal within the fluid conduit; wherein the pressure vent provides a venting conduit from inside the fluid chamber to outside the fluid chamber; and wherein the pressure vent terminates at an exterior surface of the fluid delivery port, the exterior surface contoured to mate with a resilient sealing element of the fluid infusion device to seal the pressure vent. - View Dependent Claims (8, 9, 10, 11)
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Specification