Safety-enhanced needle-free injector

A safety-enhanced needle-free injector system comprising:

• a housing;
• a bolt carrier with one or more springs held at a first end and having a firing chamber formed therein from the one or more springs to an opening at a second end opposite the first end, wherein the bolt carrier further includes a spring-driven member coupled to the one or more springs and located in the firing chamber;
• an ampoule coupleable to the bolt carrier, the ampoule having a compartment for storing an injectable for needle-free delivery and a seal for driving the injectable out an opening at a first end of the ampoule, wherein a plunger couples between the spring-driven member and the seal when a first end of the ampoule is coupled to the bolt carrier to allow the spring-driven member to engage the seal for driving the injectable along a length of the ampoule from the first end of the ampoule to a second end of the ampoule and out an opening at the second end of the ampoule, the opening comprising one or more orifices;
• and
• a user-sensible safety mechanism for providing safety-enhanced needle-free injection of the injectable, the user-sensible safety mechanism comprising a pressure-sensed, tactile-sensed or visual-sensed mechanism for preventing inadvertent user activation of the needle-free injector system.

A needle-free injector system comprising:

• a housing;
• a bolt carrier with one or more compression springs held at a first end and having a firing chamber formed therein from the one or more compression springs to an opening at a second end opposite the first end, wherein the bolt carrier further includes a spring-driven member coupled to the one or more compression springs and located in the firing chamber;
• and
• an ampoule coupleable to the bolt carrier, the ampoule having a compartment for storing an injectable for needle-free delivery and an injectable seal for driving the injectable out an opening at a first end of the ampoule, wherein the injectable seal couples to the spring-driven member via a plunger and a plunger pad when a second end of the ampoule is coupled to the bolt carrier to allow the spring-driven member to engage the injectable seal for driving the injectable seal along a length of the ampoule from the second end of the ampoule to a first end of the ampoule to eject the injectable out the opening at the second end of the ampoule, the opening at the second end of the ampoule comprising one or more orifices, and
• wherein the ampoule has one or more ampoule predefined structures formed at the second end of the ampoule and formed at an angle to a central longwise axis of the ampoule for physically inhibiting coupling of the ampoule to the bolt carrier when the one or more ampoule predefined structures do not match up to corresponding injector predefined structures formed on a plug on the second end of the bolt carrier.