Pipette for dental material

Details Pipette for dental material Pipette for dental material

A - Human Necessities

61

C

A61C 5/06 (2006.01) B01L 3/02 (2006.01)

Patent

CA 2417694

A pipette (10) having a dispensing orifice (22) and a venting orifice (23, 50). An amount of the material to be dispensed is drawn into the central passageway (12), after which the venting orifice (23, 50) is closed off, causing the material within the central passageway (12) to remain due to unequal pressures between the central passageway (12) and the atmosphere, until the venting orifice (23, 50) is again uncovered. A squeeze pump (40) may be positioned between the dispensing orifice (22) and the dispensing orifice (23) to be pinched, thereby drawing liquid into or dispensing liquid from the central passageway (12).

L'invention concerne une pipette (10) présentant un orifice de distribution (22) et un orifice de ventilation (23, 50). Une quantité du produit à administrer est acheminée dans un conduit central (12), après quoi l'orifice de ventilation (23, 50) est fermé, ce qui bloque le produit dans ledit conduit central (12) du fait de la différence de pression entre le conduit central (12) et l'air libre, jusqu'à la prochaine ouverture de l'orifice de ventilation (23, 50). Une pompe péristaltique (40) peut être placée entre l'orifice de distribution (22) et l'orifice de ventilation (23) à pincer, de façon à aspirer ou refouler le liquide dans ou hors du conduit central (12).

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