A hand-piece for injection device with a retractable and...

Details A hand-piece for injection device with a retractable and... A hand-piece for injection device with a retractable and...

A - Human Necessities

61

M

A61M 5/00 (2006.01) A61M 5/32 (2006.01) B01J 19/00 (2006.01)

Patent

CA 2369297

An injection device is arranged, and constructed to simultaneously rotate a needle (22) during its forward translation as a therapeutic agent such as a liquid is ejected therefrom. In one embodiment the injection device is an automatic device including a pump (12) forcing the liquid through a tube (18) to a hand-piece (20), a second position in which the needle (22) extends outwardly of the hand-piece (20) so that it can be used to eject the liquid, with the needle (22) being automatically uni-directionally or bi-directionally rotated as it is advanced between the first, and second positions. In an alternate position a syringe (100) is provided with a barrel (102), a plunger (112) extending into the barrel (102) by the operator. The needle (22), and plunger (112) are arranged so that as the plunger (112) enters the barrel (102) forcing the liquid to be expelled, the needle (22) automatically rotates about its axis at the same time.

La présente invention concerne un dispositif d'injection conçu pour simultanément mettre en rotation une aiguille (22) lors de son mouvement avant et injecter un agent thérapeutique tel qu'un liquide. Dans un des modes de réalisation, le dispositif d'injection est un dispositif automatique comportant une pompe (12) qui pousse le liquide dans un tube (18) vers une pièce à main (20). L'aiguille (22) présente une seconde position dans laquelle elle dépasse de la pièce à main (20) pour injecter le liquide, l'aiguille (22) étant automatiquement mise en rotation de façon unidirectionnelle ou bidirectionnelle lorsqu'elle avance entre les première et seconde positions. Dans une position alternée, la seringue (100) comprend un cylindre (102), un piston (112) s'étendant dans le cylindre (102) sous l'action de l'opérateur. L'aiguille (22) et le piston (112) sont conçus de sorte que le piston (112) pénètre dans le cylindre (102) pour pousser le liquide et l'expulser, l'aiguille (22) tournant automatiquement en même temps autour de son axe.

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