Syringe and removable needle assembly having binary...

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/34 (2006.01) B29C 45/44 (2006.01)

Patent

CA 2659171

A syringe and detachable needle assembly having binary attachment features include an elongate syringe barrel (48) having a longitudinal axis and an open distal end including a collar (55). The collar includes a cylindrically shaped sidewall having an inside surface and an outside surface. A needle assembly (61) includes the hub (62) having a body portion including a proximal end, a distal end and a conduit therethrough. A cannula (70) is attached to the hub. A lug (68) is provided on one of the collar and the hub and a ramp (59) and a rest surface is provided on the other of the collar and the hub. The ramp is oriented at an acute angle with respect to longitudinal axis for guiding the lug during needle assembly attachment, to the rest surface forcing the hub to contact the barrel to form a seal the hub and the barrel.

L'invention concerne un ensemble seringue et aiguille amovible présentant des caractéristiques de fixation binaires et comportant un cylindre de seringue allongé doté d'un axe longitudinal, d'une extrémité proximale ouverte et d'une extrémité distale ouverte comprenant un collier. Le collier comporte la paroi latérale en forme de cylindre dotée d'une surface interne et une surface externe. Un ensemble d'aiguille inclue un moyeu muni d'une partie de corps présentant une extrémité proximale, une extrémité distale et un conduit la traversant. Une canule munie d'une extrémité distale, d'une extrémité proximale et d'une lumière la traversant est fixée à l'extrémité distale du moyeu, de telle sorte que la lumière est en communication fluide avec la chambre. Une patte est disposée sur le collier ou le moyeu; une rampe et une surface d'appui sont disposées sur le moyeu ou collier. La rampe est orientée à un angle aigu par rapport à l'axe longitudinal pour guider la patte pendant la fixation de l'ensemble d'aiguille sur la surface d'appui, forçant le moyeu à entrer en contact avec le cylindre pour former un joint étanche entre le moyeu et le cylindre.

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