Needle-less injector and method of fluid delivery
First Claim
1. A needle-less injector device comprising:
- an inner housing;
an outer housing supporting the inner housing such that the inner housing is axially movable within the outer housing between a ready position and a firing position;
a tensioning spring between the inner housing and the outer housing, the tensioning spring biasing the inner housing towards the ready position;
a compressible coiled delivery spring within the inner housing, anda hammer within the inner housing, wherein decompression of the compressible coiled delivery spring while the injector is in the firing position causes the delivery spring to move the hammer laterally within the inner housing.
2 Assignments
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Accused Products
Abstract
A needle-less injector device for delivering a dose of fluid intradermally, subcutaneously or intramuscularly to an animal or human. The device includes an inner housing having opposed ends. A syringe is disposed in one end of the inner housing. The syringe includes a nozzle for delivering a dose of fluid held within the syringe. A plunger is movably disposed within the syringe. A spring powered hammer is movably disposed within the inner housing. The hammer cooperates with the plunger to drive the dose of medicament from the nozzle. An injection delivery spring for powering the hammer is positioned and compressed between the other end of the inner housing and the spring powered hammer. An outer housing slideably supports the inner housing. A skin tensioning spring is mounted between the inner housing and the outer housing, the skin tensioning spring biasing the nozzle of the syringe against the animal or human. A trigger mechanism is disposed in the outer housing, the trigger mechanism cooperating with the spring powered hammer to release the injection delivery spring, wherein the size of the injection delivery spring and the length of the hammer dictate the amount of dose delivered and whether the dose is delivered intradermally, subcutaneously or intramuscularly to an animal or human.
117 Citations
13 Claims
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1. A needle-less injector device comprising:
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an inner housing; an outer housing supporting the inner housing such that the inner housing is axially movable within the outer housing between a ready position and a firing position; a tensioning spring between the inner housing and the outer housing, the tensioning spring biasing the inner housing towards the ready position; a compressible coiled delivery spring within the inner housing, and a hammer within the inner housing, wherein decompression of the compressible coiled delivery spring while the injector is in the firing position causes the delivery spring to move the hammer laterally within the inner housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification