A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/32 (2006.01) A61M 5/34 (2006.01) A61M 5/50 (2006.01)
Patent
CA 2320783
A retracting needle syringe includes a barrel having a chamber, an open proximal end and an open distal end. A plunger is slidably positioned in fluid-tight engagement with an inside surface of the barrel. The plunger has an elongated cavity in its distal end and a cover element sealing the cavity. A needle assembly at the distal end of the barrel includes a needle cannula having an inner hub having an open proximal end and a distal end connected to the needle cannula so that the lumen of the cannula is In fluid communication with the chamber. A flange on the Inner hub is connected to a proximal end of an outer hub so that the needle cannula projects distally outwardly from a distal end of the outer hub. A spring is contained between the inner hub and the outer hub. A circular release element is movably connected to a proximal end of the flange. The release element has a distal end and a sharp proximal end projecting into the chamber, wherein distal motion of the plunger will cause the sharp proximal end to cut through the cover element and the distal end of the release element to dissociate an outer portion of the flange from an inner portion of the flange allowing the spring to expand and move the needle cannula into the cavity.
L'invention concerne une seringue à aiguille rétractable (20) comportant un cylindre (22) ayant une chambre (24), une extrémité proximale ouverte (25) et une extrémité distale ouverte (26). Le piston comporte une cavité allongée (34) dans son extrémité distale, et un élément de couverture étanche (35). L'ensemble aiguille (40) comporte un cathéter (41) ayant un embout intérieur dont l'extrémité distale est reliée de manière que la lumière soit en communication fluidique avec la chambre. Une collerette disposée sur l'embout intérieur est reliée à un embout extérieur, un ressort étant logé entre les embouts. Un élément de relâchement est relié de manière amovible à la collerette et présente une extrémité proximale aiguë en saillie dans la chambre. Du fait du mouvement distal du piston, l'extrémité proximale aiguë coupe l'élément de couverture, et l'élément de relâchement dissocie une partie extérieure de la collerette d'une partie intérieure de la collerette, permettant au ressort de s'étendre et de déplacer le cathéter dans la cavité.
Caizza Richard J.
Cipoletti Robert
Becton Dickinson And Company
Gowling Lafleur Henderson Llp
LandOfFree
Retracting needle syringe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Retracting needle syringe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retracting needle syringe will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1795755