Retractable needle syringe assembly

Details Retractable needle syringe assembly Retractable needle syringe assembly

A - Human Necessities

61

M

A61M 5/32 (2006.01) A61M 5/50 (2006.01)

Patent

CA 2578365

A syringe including a barrel (14), a retractable needle (12) and a plunger rod assembly (22) including inner (30) and outer (24) members with a stopper (46) for expelling fluids from the syringe is disclosed. An activation member (40, 44) associated with the plunger rod permits relative movement of the inner and outer members when activated. The stopper is configured to compress a sufficient amount when advanced distally in the barrel to cause the activation element to engage and cause retraction of the needle within the syringe.

L~invention concerne une seringue comportant un fût (14), une aiguille rétractable (12) et un ensemble de tige de piston (22) comportant des éléments intérieur (30) et extérieur (24) pourvus d~une butée (46) pour expulser des fluides de la seringue. Un élément d~activation (40, 44) associé à la tige de piston permet, une fois activé, le mouvement relatif des éléments intérieur et extérieur. La butée est configurée pour exercer une compression suffisante, lorsqu~elle est enfoncée dans le fût, pour amener l~élément d~activation à venir en prise avec l~aiguille dans la seringue et à la rétracter.

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