Universal safety syringe

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01) A61M 5/50 (2006.01) A61M 5/315 (2006.01) A61M 5/34 (2006.01)

Patent

CA 2280192

Universal safety syringe having a protective cap, a cylinder, a plunger and a cannula mounted on a cannula base, it being the case that the cannula base is designed such that it can be pushed firmly against a stop in the protective cap, that the protective cap, which can be pushed externally onto a cone, corresponding to a Luer cone, of the cylinder, is provided with a narrowed section, which is provided on the inside of the cap, in front of a recess designed for receiving the cannula base, and delimits the push-on travel, that a recess which receives a cannula base is provided with an undercut which prevents the cannula base from being removed in the forward direction, and with an undercut of which the effect can be overcome by the cone being widened from the inside and which is provided for safeguarding the cannula stop from being pushed in unintentionally during insertion of the syringe, and it also being the case that the plunger is designed with a section which widens the cone cylindrically and with a mushroom-shaped plunger head, which comes into pulling contact with the needle stop. A preferred embodiment provides a safeguard against the plunger being unintentionally pushed in too early and too far.

Seringue de sécurité universelle comprenant une coiffe protectrice, un cylindre, un piston et une canule montée sur une embase, caractérisée en ce que l'embase de la canule est insérée dans la coiffe protectrice, rigidement à l'encontre d'une butée, la coiffe est montée coulissante sur la partie externe conique du cylindre correspondant à un cône Luer et présente un rétrécissement limitant le siège d'ajustage, prévu sur sa partie interne, à l'avant d'une cavité destinée au logement de l'embase de la canule, ladite cavité pour le logement de l'embase présentant une contre-dépouille empêchant que l'embase soit retirée vers l'avant, ainsi qu'une contre-dépouille pouvant être soulevée de l'intérieur par un élargissement du cône et destinée à empêcher que l'embase soit poussée involontairement vers l'intérieur pendant la piqûre, et en ce que le piston présente en outre une section élargissant cylindriquement le cône, ainsi qu'une tête de piston en forme générale de champignon entrant en contact, par sollicitation à la traction, avec l'embase de la canule. Selon une forme d'exécution préférée, des moyens de sécurité sont prévus pour empêcher un enfoncement involontaire trop précoce et trop prononcé du piston.

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