Injection syringe with needle projecting in the syringe body

Details Injection syringe with needle projecting in the syringe body Injection syringe with needle projecting in the syringe body

A - Human Necessities

61

M

A61M 5/50 (2006.01) A61M 5/28 (2006.01) A61M 5/32 (2006.01)

Patent

CA 2275347

The invention concerns an injection syringe (10) comprising a syringe body (12) bearing an injecting needle (22) and an actuating piston (14) movably mounted in the body (12). The injecting needle (22) extends axially inside the body (12) up to a rear end (22B) on one side of which is initially arranged in the body (12) a transverse wall (90, 96) capable of being perforated. Said transverse wall (90, 96) is movable relative to the needle from an initial position in which the transverse wall (90, 96) is at some distance from the needle (22) to a final position in which the transverse wall (90, 96) is pierced by said needle (22). The syringe comprises rigid means (64) for axially guiding the rear end (22) of the needle when the transverse wall (90, 96) is being pierced.

La seringue d'injection (10) comporte un corps de seringue (12) portant une aiguille d'injection (22) et un piston d'actionnement (14) monté déplaçable dans le corps (12). L'aiguille d'injection (22) se prolonge axialement à l'intérieur du corps (12) jusqu'à une extrémité arrière (22B) à l'écart de laquelle est initialement disposée dans le corps (12) une paroi transversale perforable (90, 96). Ladite paroi transversale (90, 96) est déplaçable par rapport à l'aiguille depuis une position initiale dans laquelle la paroi transversale (90, 96) est écartée de l'aiguille (22) jusqu'à une position finale dans laquelle la paroi transversale (90, 96) est transpercée par ladite aiguille (22). Elle comporte des moyens rigides (64) de guidage axial de l'extrémité arrière (22) de l'aiguille lors de la perforation de la paroi transversale (90, 96).

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