Device and method for the complete uptake of liquids from vessels
A device is provided for the complete uptake of liquids from vessels using removal units having removal tips. The removal tips or the vessel bottoms are configured or arranged relative to one another such that the area of the surface of a vessel bottom on which the respective removal tip would touch down, when that removal tip is inserted into the vessel, and the end surface of the removal tip are tilted relative to each another, at least on a portion of the two surfaces. That is to say, the surfaces are not parallel there.
1. A device for taking up liquid from a vessel having a bottom with a curved surface, the device comprising a removal unit having a removal tip formed as a channel surrounded by a wall, the removal tip having at its end an end surface defined by the surrounding wall, wherein the removal tip or the vessel bottom is configured or arranged relative to each other such that an area of the surface of the vessel bottom on which the removal tip would touch down, when the removal tip is inserted into the vessel, and an area of the end surface of the removal tip are tilted relative to each other at least in one portion of the two surface areas, such that the two surface areas are not parallel at the tilted portion, and wherein the removal tip is arranged eccentrically to an apex of curvature of the vessel bottom surface, such that when the removal tip touches down on the vessel bottom there will always result a gap between the at least one portion of the surface area of the vessel bottom and the end surface area of the removal tip, so that the removal tip is prevented from suctioning to the vessel bottom and the liquid flows through the gap into the removal unit.
2. The device according to claim 1 , wherein the bottom surface of the vessel is positioned so as to be oblique relative to the end surface of the removal tip.
3. The device according to claim 1 , wherein the end surface of the removal tip is beveled relative to a longitudinal axis of the removal tip.
4. The device according to claim 1 , wherein the end surface of the removal tip has a shape deviating from a planar surface.
5. The device according to claim 1 , further comprising at least one compensation element designed to ensure that, when the removal tip touches the vessel bottom, the vessel or the removal tip will perform an evasive movement in a direction of relative movement between the removal tip and vessel.
6. The device according to claim 5 , wherein the compensation element is arranged in a guide unit comprising guide elements that guide the at least one compensation element, a holding device for the vessel, the vessel, or the removal unit along a straight path.
7. The device according to claim 6 , wherein the guide unit comprises a sleeve having walls and at least one opening at a top side of the sleeve, and wherein the walls of the sleeve form the guide elements.
8. The device according to claim 7 , wherein the sleeve has a length such that it receives the at least one compensation element.
9. The device according to claim 8 , wherein the sleeve length is such that it receives the holding device together with the compensation element.
10. The device according to claim 8 , wherein the sleeve length is such that it receives the at least one compensation element together with at least part of the vessel or part of the removal unit.
11. The device according to claim 5 , wherein the at least one compensation element comprises at least one element selected from the group comprising active and passive elements.
12. The device according to claim 5 , wherein the at least one compensation element comprises at least one element selected from the group comprising springs, resilient materials, piezo elements, muscle wires, and motors.
13. The device according to claim 5 , wherein the at least one compensation element is configured as a distance adjustment element.
14. The device according to claim 1 , further comprising a calibration element to calibrate a distance between the vessel bottom and the end of the removal tip.
15. A method for taking up liquid from a liquid-filled vessel having a curved bottom surface, the method comprising providing a removal unit having a removal tip formed as a channel surrounded by a wall, the removal tip having at its end an end surface defined by the surrounding wall, arranging the removal tip eccentrically to an apex of curvature of the vessel bottom, and tilting an area of the surface of the vessel bottom on which the removal tip would touch down, when the removal tip is inserted into the vessel, and an area of the end surface of the removal tip relative to each other at least in one portion of the two surface areas, such that the two surfaces are not parallel at the tilted portion, such that when the removal tip touches down on the vessel bottom there will always result a gap between the at least one portion of the surface area of the vessel bottom and the end surface of the removal tip, so that the removal tip is prevented from suctioning to the vessel bottom and the liquid flows through the gap into the removal unit.