Hypodermic syringe

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01) A61M 5/31 (2006.01) A61M 5/50 (2006.01) A61M 25/06 (2006.01)

Patent

CA 2096026

A hypodermic injection system (7) with a retractable needle (9) wherein the needle (9) retracts within an interior cavity (71) of a syringe plunger (59); so that the needle (9) is safely and confinedly held within the plunger (59) for ease of handling and transport, while remaining safely therein, A cylindrical spring housing (21) has resilient fingers (23) which can capture a coiled spring (15) which biasly, holds a needle holder (11) against the retaining force of the resilient fingers (23), The plunger (59) has a frangible end (65), which, when engaging the resilient fingers (23) under a, pre-determined amount of force, dissociate while remaining outwardly tapered shoulders (68) spread the resilient fingers (23), allowing the coiled spring (15) to eject the needle (9) and its holder (11) into the interior cavity (71) of the syringe plunger (59).

Système d'injection hypodermique (7) comportant une aiguille rétractile (9) dans lequel l'aiguille (9) se rétracte dans une cavité intérieure (71) d'un piston de seringue (59); l'aiguille (9) est ainsi maintenue de manière sûre à l'intérieur du piston (59), ce qui facilite la manutention et le transport. Une cage de ressort cylindrique (21) comporte des doigts résilients (23) qui peuvent saisir un ressort enroulé (15); ledit ressort maintient par sollicitation un support d'aiguille (11) en agissant contre la force de rétention des doigts résilients (23). Le piston (59) possède une extrémité cassante (65), qui, lorsque les doigts résilients (23) sont poussés avec une force prédéterminée, se dissocie, tandis que l'épaulement (68) extérieurement conique qui subsiste écarte les doigts résilients (23); le ressort enroulé (15) peut alors éjecter l'aiguille (9) et son support (11) dans la cavité intérieure (71) du piston de seringue (59).

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