CPC A61M 5/30 (2013.01) [A61M 5/3158 (2013.01); A61M 5/002 (2013.01); A61M 5/425 (2013.01); A61M 2005/208 (2013.01); A61M 2205/6081 (2013.01)] | 12 Claims |
1. A method of providing a needle-less injector comprising:
assembling a needle-less injector by steps comprising;
providing an inner housing;
providing an outer housing;
positioning the inner housing within the outer housing such that the inner housing is axially movable within the outer housing between a ready position and a firing position;
receiving input from a user selecting a delivery spring weight from a plurality of available delivery spring weights;
positioning a delivery spring having the selected delivery spring weight within the inner housing; and
delivering to the user the needle-less injector including the delivery spring.
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