Liquid transfer device

Details Liquid transfer device Liquid transfer device

B - Operations, Transporting

01

L

B01L 3/02 (2006.01) G01N 1/14 (2006.01)

Patent

CA 2166115

A liquid transfer device including a holder for a pipette array. A flexible preformed membrane (17) having cups (19) is over the proximal openings of the pipettes (23) and sandwiched therebetween with a housing (11) with the cups extending into the proximal openings of the pipettes. A vacuum drawn in the housing everts the membrane from the proximal openings thereby creating reduced pressure in the pipettes which when their distal ends are immersed in a liquid will draw up some of the liquid into the pipettes in substantial equal amounts. In one embodiment a movable abutment (13) is provided to control the upward travel of the everting membrane and thereby the amount of liquid drawn into the pipettes. A method for fabricating the preformed membrane is also shown.

L'invention concerne un dispositif de transfert de liquide comportant un support conçu pour une rangée de pipettes. Une membrane flexible préformée (17) présentant des cuvettes (19) est prévue par-dessus les ouvertures proximales des pipettes (23) entre lesquelles elle est prise en sandwich, et un boîtier (11), les cuvettes s'étendant dans les ouvertures proximales des pipettes. L'aspiration de vide dans le boîtier retourne la membrane depuis les ouvertures proximales, ce qui réduit la pression dans les pipettes qui, lorsque leur extrémité distale est immergée dans un liquide, envoient du liquide dans les pipettes en doses pratiquement égales. Dans un mode de réalisation, une butée mobile (13) est prévue pour commander le déplacement vers le haut de la membrane retournée ainsi que le volume de liquide envoyé dans les pipettes. Un procédé de fabrication de la membrane préformée est également décrit.

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