A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/65
A61M 5/30 (2006.01)
Patent
CA 2021566
In general, needleless injectors for use with disposable syringes are intended for single injections or are unduly complicated. A simple, multi-dose needleless injector includes a cylindrical casing with a closed front end and an open rear end, a sleeve slidably mounted on the closed front end of the casing, a barrel extending through the outer free end of the sleeve into the front end of the casing for receiving a tubular syringe body, a cap for releasably retaining the syringe in the barrel, a tubular bushing slidable in the casing for movement between a cocked and a discharge position, a latch for releasably retaining the bushing in the cocked position, a plunger extending through the bushing for projecting into the syringe body to bear against a plug therein, a spring for driving the bushing and the plunger from the cocked position to a discharge position, a trigger for actuating the latch to release the bushing, whereby the spring drives the bushing and the plunger forwardly to move the plug in the syringe body towards a discharge orifice in the outer end of the syringe body, and a clutch in the bushing for releasably connecting the plunger to the bushing, whereby the plunger moves with the bushing during medicine discharge, and the plunger can be released from the bushing for rearward movement when cocking the injector or inserting a fresh syringe.
Idee International R. & D. Inc.
Seaby & Associates
LandOfFree
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