Patent ID: 7867449
Filing Date: 2011-01-11
Classification: B01L,G01N

Abstract:
1. A liquid supply device into which liquid enters and from which liquid exits, comprising: a tapered pipette tip having a substantially circular cross-section and including a distal end portion, a body portion and an outer peripheral step portion disposed between the distal end portion and the body portion, the distal end portion having an opening therein that dispenses or draws in liquid, the diameter of the body portion being larger than the diameter of the distal end portion; a flow path member including an end surface having formed therein an exit/entry opening through which the liquid enters and from which the liquid exits and which defines a flow path communicated with the exit/entry opening, at least one of a surface of the distal end portion of the pipette tip and the end surface of the flow path member being elastically deformable; and a receiving member that at least partially circumscribes the flow path member and includes a recessed portion that communicates with the exit/entry opening, wherein: the recessed portion is defined by: tip that is shorter than the length of the distal end portion in the insertion direction of the pipette tip, and diameter of the first inner wall portion and which includes an inner peripheral step portion adjacent the first inner wall portion, wherein the first inner wall portion is disposed closer to the flow path member than is the second inner wall portion, and a distal end surface of the pipette tip is pushed against an end surface of the flow path member in which the exit/entry opening is formed, whereby the opening in the pipette tip and the exit/entry opening of the flow path member are communicated with each other and the elastically deformable end surface of the pipette tip or the flow path member is deformed such that the outer peripheral step portion is brought into contact with the inner peripheral step portion.