Triggering mechanism for needle-free injector
First Claim
1. A needle-free injection device comprising:
- a drug delivery system including a nozzle having a drug chamber and an outlet orifice, the drug delivery system adapted to expel a volume of liquid from the drug chamber through the outlet orifice;
an actuation system including;
an injection force assembly adapted to transmit a driving force to the drug delivery system; and
a trigger assembly adapted to alter the actuation system between a plurality of configurations including a fired configuration in which the injection force assembly transmits a driving force to the drug delivery system; and
a recoil restriction system including a restriction member adapted to couple the recoil restriction system to the trigger assembly, and a recoil member coupled to the injection force assembly and movable relative to the restriction member, wherein the restriction member limits movement of the recoil member once the recoil member moves a predetermined distance relative to the restriction member.
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Accused Products
Abstract
Needle-free hypodermic jet injection devices having an actuation system to effect an injection from a drug delivery system. The actuation system includes an injection force assembly adapted to transmit a driving force to the drug delivery system. The actuation system further includes a trigger assembly adapted to alter the actuation system between a plurality of configurations including a fired configuration in which the injection force assembly transmits a driving force to the drug delivery system. In some embodiments, the device has a recoil restriction system including a restriction member adapted to couple the recoil restriction system to the trigger assembly and a recoil member coupled to the injection force assembly and movable relative to the restriction member. The restriction member limits movement of the recoil member once the recoil member moves a predetermined distance relative to the restriction member.
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Citations
7 Claims
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1. A needle-free injection device comprising:
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a drug delivery system including a nozzle having a drug chamber and an outlet orifice, the drug delivery system adapted to expel a volume of liquid from the drug chamber through the outlet orifice; an actuation system including; an injection force assembly adapted to transmit a driving force to the drug delivery system; and a trigger assembly adapted to alter the actuation system between a plurality of configurations including a fired configuration in which the injection force assembly transmits a driving force to the drug delivery system; and a recoil restriction system including a restriction member adapted to couple the recoil restriction system to the trigger assembly, and a recoil member coupled to the injection force assembly and movable relative to the restriction member, wherein the restriction member limits movement of the recoil member once the recoil member moves a predetermined distance relative to the restriction member. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification