GAS-PRESSURED MEDICATION DELIVERY SERVICE
First Claim
1. A medication delivery device for injection of a medication, comprising:
- a medication reservoir;
a pressure housing;
a piston assembly comprising a piston coupled to a needle, the piston being movable from a retracted position to a deployed position; and
a valve fluidically coupled between the medication reservoir and the needle and between the pressure housing and the piston assembly,wherein the valve is movable from a first position in which the pressure housing is fluidically coupled to the piston assembly through a first fluid flow path, to a second position in which the pressure housing is fluidically coupled to the piston assembly through a second fluid flow path.
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Accused Products
Abstract
The present invention relates to medical devices and particularly to a medication delivery device for self-injection of a medication, or for healthcare professionals to administer a medication. In one embodiment, a medication delivery device utilizes a source of gas pressure to deploy a needle, deliver a desired amount of medication through the needle, and retract the needle for disposal. Fluid flow paths from the source of gas pressure communicate the gas pressure to the needle and to the medication in order to accomplish these steps. In one embodiment, a valve is positioned to open and close the flow of the pressurized gas to the needle and the flow of the medication to the needle, so that the valve can be operated to deploy the needle and deliver the medication through the needle when the user is ready for the injection. The valve can also be operated to retract the needle when the dose is complete.
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Citations
21 Claims
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1. A medication delivery device for injection of a medication, comprising:
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a medication reservoir; a pressure housing; a piston assembly comprising a piston coupled to a needle, the piston being movable from a retracted position to a deployed position; and a valve fluidically coupled between the medication reservoir and the needle and between the pressure housing and the piston assembly, wherein the valve is movable from a first position in which the pressure housing is fluidically coupled to the piston assembly through a first fluid flow path, to a second position in which the pressure housing is fluidically coupled to the piston assembly through a second fluid flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medication delivery device for injection of a medication, comprising:
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a medication reservoir; a pressure housing containing a source of gas pressure; a piston assembly comprising a piston coupled to a needle, the piston being movable from a retracted position to a deployed position; a first flow path from the pressure housing to the piston assembly; and a valve fluidically coupled between the pressure housing and the piston assembly, the valve being movable from a first position in which the valve blocks a flow of the gas pressure through the first flow path, to a second position in which the valve allows such flow to move the piston assembly from the retracted position to the deployed position. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A medication delivery device for injection of a medication, comprising:
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a medication reservoir; a source of gas pressure; and a piston assembly comprising a piston coupled to a needle, wherein the needle is fluidically coupled to the medication reservoir, and wherein the piston is movable, by a fluid flow from the source of gas pressure, from a retracted position in which the needle is contained within the medication delivery device to a deployed position in which the needle extends from the medication delivery device, and is movable, by the fluid flow from the source of gas pressure, from the deployed position to the retracted position. - View Dependent Claims (18, 19)
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20. A method for injecting medication, comprising:
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providing a medication delivery device comprising; a medication reservoir containing a medication; a pressure housing containing a source of gas pressure; and a piston assembly comprising a piston coupled to a needle, the piston being movable from a retracted position in which the needle is contained within the medication delivery device to a deployed position in which the needle extends from the medication delivery device; deploying the needle by communicating a fluid flow from the source of gas pressure to the piston assembly; delivering the medication to the needle by communicating the fluid flow from the source of gas pressure to the medication reservoir; and retracting the needle by communicating the fluid flow from the source of gas pressure to the piston assembly. - View Dependent Claims (21)
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Specification