Needleless hypodermic injection device with non-electric...

Details Needleless hypodermic injection device with non-electric... Needleless hypodermic injection device with non-electric...

A - Human Necessities

61

M

A61M 5/303 (2006.01) A61M 5/20 (2006.01) A61M 5/30 (2006.01) A61M 5/48 (2006.01) A61M 5/24 (2006.01) A61M 5/31 (2006.01)

Patent

CA 2507341

A device (11) for performing a needleless hypodermic injection of a liquid medication contained in the device (11). The device (11) includes pyrotechnical means for generating within the device (11) a pressure necessary for injecting the medication. The device (11) comprises non-electric ignition means for igniting a propellant (24a) contained in said device (11). The ignition means comprise in particular an impact sensitive primer material (2) and a firing pin (5) for striking said primer material (2), said primer material (2) being so positioned with respect to the propellant (24a) that when the firing pin (5) strikes the primer material (2) the hot products of combustion of said primer material (2) ignite the propellant (24a).

L'invention concerne un dispositif permettant d'injecter de manière hypodermique, sans aiguille, un médicament liquide dans le dispositif. Ledit dispositif comprend des moyens pyrotechniques destinés à produire à l'intérieur du dispositif une pression nécessaire à l'injection du médicament. Le dispositif comprend des moyens d'amorçage non électriques destinés à amorcer un propulseur contenu dans ledit dispositif. Lesdits moyens d'amorçage comprennent en particulier une matière d'amorce sensible aux impacts et une goupille de déclenchement destinée à amorcer ladite matière d'amorce, cette dernière étant positionnée par rapport au propulseur, de sorte que, lorsque la goupille de déclenchement amorce la matière d'amorce, les produits chauds de la combustion de ladite matière d'amorce enflamment le propulseur.

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