High workload needle-free injection system
AssigneeBioject, Inc.
InventorsSergio Landau, Daniel E. Williamson
Life of this patent
Estimating the term…
Abstract
A needle-free injection device is described. The injection device typically includes a system for providing directed and pre-selected pressure and a nozzle with an orifice for defining a stream of fluid that is directed toward the skin of a patient against which a front end of the nozzle is positioned. The device also normally includes an engagement system that can selectively engage the nozzle with the pressurizing system so that the nozzle can be mounted to the pressurizing system to receive pressure for injection and so that after injection the nozzle can be removed and replaced for each new use of the device.
Claims34
A needle-free injection device, comprising:
- a syringe assembly configured to draw in and expel injectable fluid;
- and
- a locking mechanism configured to prevent actuation of the device;
- a disposable nozzle configured to temporarily engage the housing and including a deactivatable mechanism for temporarily unlocking the locking mechanism, the disposable nozzle being in fluid communication with the syringe assembly when the disposable nozzle is engaged with the housing;
- wherein upon firing of the device, the mechanism for temporarily unlocking the locking mechanism is permanently deactivated.
A needle-free injection device comprising:
- a syringe assembly configured to expel injectable fluid upon application of an operative force to the syringe assembly;
- a first delivery mechanism adapted to delivery energy from an external energy supply to an energy reserve;
- a second delivery mechanism adapted to deliver the operative force from the energy reserve to the syringe assembly;
- a locking mechanism configured to prevent operation of the second delivery mechanism;
- a disposable nozzle configured to temporarily fluidly communicate with the syringe assembly, wherein engagement of the disposable nozzle with the syringe assembly initiates operation of the first delivery mechanism and releases the locking mechanism.
A method of performing an injection with a needle-free injection device including a trigger and a syringe assembly configured to expel injectable fluid upon delivery of an operative force to the syringe assembly, the method comprising:
- engaging a disposable nozzle assembly with the syringe assembly to deactivate a first locking mechanism configured to prevent actuation of the trigger;
- actuating the trigger to deactivate a second locking mechanism configured to prevent delivery of the operative force to the syringe assembly;
- and
- pushing the needle-free injection device against an injection site to deliver the operative force to the syringe assembly such that injectable liquid is expelled from the device.
A needle-free injection device, comprising:
- a system for providing directed and pre-selected pressure;
- a nozzle with an orifice for defining a stream of fluid that is directed toward the skin of a patient against which a front end of the nozzle is positioned;
- and
- an engagement system that can selectively engage the nozzle with the pressurizing system so that the nozzle can be mounted to the pressurizing system to receive pressure for injection and so that after injection the nozzle can be removed and replaced for each new use of the device.
A method of performing an injection with a needle-free injection device for a patient, comprising:
- mounting a removable nozzle assembly to a device for providing a pre-selected pressure, the nozzle assembly including an injection orifice for defining a flow of injectable fluid therethrough, the nozzle assembly further including a frangible web that conceals and protects the injection orifice but is axially spaced from the orifice and from a forward end of the nozzle;
- providing a supply of injection fluid to the nozzle;
- positioning the forward end of the nozzle against the patients skin;
- and
- firing the device to provide injection fluid under the pre-selected pressure to the injection orifice, causing the injection orifice to define the flow of injectable fluid, the defined flow of injectable fluid passing through an axial space and then through the frangible web to pierce the web, and then through another axial space before passing through the forward end of the nozzle and entering the skin of the patient.
Dependencies are inferred from the claim text.