A needle for penetrating a membrane

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01)

Patent

CA 2513705

A needle (1) for penetrating a membrane (2), having a pointed end (3) provided with a penetrating tip (4) and with an opening (6) for letting a liquid in and/or out in a main direction (7) which is substantially parallel to the longitudinal extension of the needle (1). The penetrating tip (4) is designed with a substantially point-shaped edge (8) to initially prick the membrane when the membrane is penetrated. The outer edges (19) present on the pointed end (3) in the area from the point-shaped edge (8) to a position beyond the opening (6) are rounded so that after the initial penetration the pointed end (3) will push the membrane material away rather than cutting the membrane material.

L'invention concerne une aiguille (1) destinée à la pénétration d'une membrane (2), présentant une extrémité pointue (3) pourvue d'une pointe de pénétration (4) et d'une ouverture (6) pour le passage d'un liquide dans et/ou en dehors d'une direction principale (7), sensiblement parallèle à l'extension longitudinale de l'aiguille (7). La pointe de pénétration (4) est conçue de manière à présenter un bord (8) sensiblement profilé ponctuel pour piquer initialement la membrane lorsque celle-ci doit être pénétrée. Les bords extérieurs (19) situés sur l'extrémité pointue (3) dans la zone s'étendant à partir du bord ponctuel (8) vers un emplacement au-delà de l'ouverture (6), sont arrondis de telle façon qu'après une pénétration initiale, l'extrémité pointue (3) repousse à distance le matériau de la membrane plutôt que de couper ce matériau.

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