Claims
- 1. A needle-free injection device, comprising:
a syringe assembly configured to draw in and expel injectable fluid, the syringe assembly being configured to expel injectable fluid upon application of pressurized gas to the syringe assembly from a gas reservoir; and a marking assembly configured to place a mark on or near an injection site to indicate an injection has occurred, the marking assembly being fluidly coupled with the needle-free injection device, such that the marking device is activated upon post-injection venting of the needle-free injection device.
- 2. The needle-free injection device of claim 1, where the marking assembly includes a housing adapted to retain a fluid reservoir.
- 3. The needle-free injection device of claim 2, where the fluid reservoir terminates in a nib adapted to draw fluid from within the fluid reservoir out of the fluid reservoir.
- 4. The needle-free injection device of claim 3 wherein the housing terminates in an outlet through which the nib at least partially extends.
- 5. The needle-free injection device of claim 4 including a fluid pathway adapted to direct exhaust gas from the syringe assembly across the nib and out of the outlet.
- 6. The needle-free injection device of claim 3, where the slidable valve assembly fluidly couples the gas reservoir with the housing such that exhaust gas from the gas reservoir is directed over a tip of the marking instrument.
- 7. The needle-free injection device of claim 1, where the syringe assembly includes a slidable valve assembly configured to control buildup and release of pressure within the gas reservoir, the slidable valve assembly being progressively movable from a fired position to a stored position, where:
when the slidable valve assembly is moved from the fired position to the stored position the slidable valve assembly fluidly couples the gas reservoir with the marking assembly.
- 8. A needle-free injection device comprising:
a user-grippable housing; a syringe assembly movably secured to the housing and configured to expel injectable fluid out of the nozzle upon application of a pressurized gas to the syringe assembly; a pressurized gas delivery mechanism disposed within the housing and configured to selective apply pressurized gas to the syringe assembly; and a marking assembly configured to place a mark on or near an injection site to indicate an injection has occurred, the marking assembly being fluidly coupled with the needle-free injection device, such that the marking device is activated by exhaust gas from the gas delivery mechanism.
- 9. The needle-free injection device of claim 8 wherein the exhaust gas is directed to the marking assembly upon post-injection venting of the needle-free injection device.
- 10. The needle-free injection device of claim 8 wherein the marking assembly includes a housing configured to retain a fluid reservoir.
- 11. The needle-free injection device of claim 10 wherein the fluid reservoir is a marker having a nib.
- 12. The needle-free injection device of claim 11 wherein the exhaust gas is directed over the nib of the marker and onto the surface of an injection recipient.
- 13. A needle-free injection device, comprising;
a gas reservoir; a syringe assembly configured to expel injectable fluid out of a nozzle upon application of pressurized gas from the gas reservoir to the syringe assembly; a pressurized gas delivery mechanism adapted to apply pressurized gas to the syringe assembly a marking assembly configured to place a mark on or near an injection site to indicate an injection has occurred; and an exhaust gas pathway configured to direct at least a portion of exhaust gas from the pressurized gas delivery mechanism to the marking assembly.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of U.S. patent application Ser. No. 10/164,920, filed Jun. 4, 2002, the disclosure of which is incorporated in its entirety for all purposes.
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
10164920 |
Jun 2002 |
US |
Child |
10756945 |
Jan 2004 |
US |