Patent ID: 8011257
Filing Date: 2011-09-06
Classification: B01L

Abstract:
1. A multichannel pipette, comprising: a grip part that structurally defines a longitudinal axis and that includes a piston-driving device which is movable axially in the direction of the longitudinal axis; a displacement part including a plurality of cylinder and piston arrangements disposed alongside one another; and a connection device by which the grip part is detachably connected to the displacement part, the connection being axially rigid, but permitting a rotation of the displacement part relative to the grip part about the longitudinal axis, wherein the connection device includes a threaded connection element arranged on a support part of the grip part, and a connection part having a matching threaded element in engagement with the threaded connection element, wherein the displacement part is mounted on the connection part so as to rotate about the longitudinal axis, wherein the cylinder and piston arrangements include pistons and interconnected cylinders, the pistons being coupled to one another, and are jointly movable axially relative to the interconnected cylinders by actuation of a piston-driving device provided, wherein the connection part is connected with the coupled cylinders of the cylinder and piston arrangements in an axially fixed manner and includes a clearance for a rotary bearing provided therein, wherein matching form-fit configurations are respectively provided on the support part and the connection part, wherein the threaded elements are substantially engaged with one another, wherein the form-fit configurations are in engagement with one another in such a way that they prevent a reverse rotation of the connection part relative to the support part, and wherein, by a manual release action, the form-fit configurations are disengaged from one another, so that the connection part rotates in a reverse rotation relative to the support part.