Patent ID: 7618393

Claim:
A needle-less injector device comprising: an outer housing; an inner housing having opposed first and second ends; wherein the inner housing is within the outer housing, the inner housing being movable within the outer housing between a ready position and a firing position; a syringe in the first end of the inner housing, the syringe including a nozzle for delivering a dose of fluid held within the syringe; a plunger within the syringe; a spring powered hammer within the inner housing, the hammer communicating with the plunger to drive the fluid from the nozzle; an injection delivery spring located between the second end of the inner housing and the spring powered hammer; an outer housing supporting the inner housing; a tensioning spring mounted between the inner housing and the outer housing, and configured to provide force to the syringe such that a tip of the syringe pulls adjacent skin of a patient or animal taut when the inner housing is in a firing position; and a trigger mechanism in the outer housing, the trigger mechanism cooperating with the hammer to release the injection delivery spring.