Patent ID: 6773381
Filing Date: 2004-08-10
Classification: B01L,G01N,Y10T

Abstract:
A device for interchanging suction pipettes which are to be removed from a magazine and coupled to a fitting head of a fitting device and detached therefrom and deposited in the magazine, the fitting head comprising, on its side which faces the magazine, a motor having a drive shaft and a star-shaped part and a latching plate mounted thereon, the latching plate having at least one nub which, after insertion of the star-shaped part into a star-shaped cutout in the suction pipette and after rotation of the star-shaped part and the latching plate into a locking position, engages a notch which is situated in a surface of the suction pipette which faces the fitting head, and wherein the nub, on insertion of a suction pipette into the magazine can be moved out of the notch, further wherein the magazine has on a side facing the fitting head a sliding ring which is arranged in a rotationally fixed manner in the magazine and into which the suction pipette can be inserted so that an outer edge portion of latching plate comes to rest on the sliding ring at a point where it is raised away from the star-shaped part so that the nub is situated above that surface of the suction pipette which faces the fitting head, and after rotation of the star-shaped part and the latching plate into a locking position and removal of the suction pipette from the sliding ring, said nub engages the notch when the latching plate is relaxed, and when the star-shaped part enters into the sliding ring is raised by prestressing and raising the latching plate upward out of the notch.