A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/30 (2006.01) A61M 5/20 (2006.01) A61M 5/24 (2006.01) A61M 5/28 (2006.01) A61M 5/31 (2006.01) A61M 5/315 (2006.01)
Patent
CA 2167586
A needle-less injector comprises a cartridge (3) prefilled with liquid (9), which cartridge contains a free sliding piston (32) and an injection orifice (10). A ram (22) is urged by a pre-loaded spring (24) for striking the said piston to cause the injections. Adjusting means (6) can be provided to vary the volume injected. A trigger device (26, 30) initiates injection only when the optimum contact pressure is reached between the discharge orifice (1) and epidermis of the subject. The initial loading of the power spring (24) is sufficient to dispense all of the contents of the medicament cartridge in one dose or multiple sequential doses. Disposable and reusable embodiments are described.
Un injecteur sans aiguille comporte une cartouche (3) remplie au préalable d'un liquide (9). La cartouche comporte un piston (32) coulissant librement et un orifice d'injection (10). Un butoir (22) est poussé par un ressort (24) comprimé au préalable, pour venir frapper ledit piston et provoquer les injections. On peut prévoir des moyens de réglage (6) pour modifier le volume injecté. Un dispositif de gâchette (26, 30) amorce l'injection uniquement lorsque la pression de contact optimale est atteinte entre l'orifice de sortie (1) et l'épiderme du sujet. La charge initiale du ressort (24) est suffisante pour injecter tout le contenu de la cartouche de médicament en une ou en plusieurs doses. Des formes d'exécution à usage unique et à usage multiple sont décrites.
Riches Mckenzie & Herbert Llp
Weston Medical Limited
Zogenix Inc.
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