Autoinjector
AssigneeNuance Designs of CT, LLC
InventorsDavid DeSalvo, Carlos Guillermo
Life of this patent
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Abstract
An autoinjector includes a main body having a container, the container having a drug therein, a hollow needle coupled to the container through which the drug can be delivered. The autoinjector also has a power source having a liquefied gas therein as a driver, a flow regulator, and at least one outlet through which some of the driver can exit the power pack in a gaseous state. The power source and container are coupled together for operation such that, when an injection is initiated, the flow regulator will control an exit rate of the driver such that the liquefied gas in the power source is maintained at substantially its vapor pressure and the power source will adjustably apply a force to deliver the drug via the hollow needle at a delivery rate that is a constant delivery rate.
Claims22
An autoinjector comprising:
- a main body that includes:
- a container having a drug therein;
- a hollow needle coupled to the container;
- and
- a power source coupled to the container, the power source including:
- a liquefied gas therein as a driver at a first pressure, and
- a flow regulator configured to regulate a flow of the driver out of he power source at a second pressure less than the first pressure,
- wherein the driver at the second pressure provides an adaptively variable force to drive the drug from the container and out the hollow needle.
The autoinjector of claim wherein the first pressure is about 108 to 845 psi and the second pressure is about 10 to 20 psi.
Dependencies are inferred from the claim text.