Auto-Injector

Abstract: an auto-injector comprising an elongate housing containing a syringe. the housing having an orifice intended to be applied against an injection site. the syringe is slidably arranged with respect to the housing. a spring pushing the needle from a covered position into an advanced position, operating the syringe and covering the needle. an activator arranged to lock the spring prior to manual operation and capable of, upon manual operation, releasing the spring means for injection. a first gear arrangement and a second gear arrangement arranged fro converting torque from a first end and a second end of the torsion spring into a translative force. the first end groundable in the housing while the second end acts on a plunger through the second gear arrangement for advancing the needle and supplying the dose.

Inventor(s): Thomas Mark Kemp, Timothy Donald Barrow-Williams, Matthew Ekman

CPC Classification: A61M5/3204 (DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals ; means for inserting tampons ; devices for administering food or medicines orally ; containers for collecting, storing or administering blood or medical fluids ); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery ; chemical aspects of surgical articles ); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents )})

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