Abstract: The invention relates to liquid dispensing and concerns a multichannel pipette, which comprises on its lower tip a shelf in the transverse direction of the tip and to which lower tip a pipette tip can be attached, which pipette tip comprises at least one longitudinal claw, whereby when the pipette tip is in its place, the point of the claw is above the shelf. Each cylinder is connected with a claw opening comprising an opener so that by pressing the opener downwards the claws can be turned outwards off the shelf. The opening mechanism further comprises an organ resilient in the longitudinal direction. In accordance with the invention, the tip removal is made to function reliably, even if there were significant differences in the dimensioning of the opening constructions of the lower tips.

Abstract: A pipette includes a housing defining a suction chamber. A piston is configured to move in the suction chamber. A first retainer mechanism includes a first threading configured to limit a motion of the piston in the suction chamber. A second retainer mechanism includes a second threading configured to limit the motion of the piston in the suction chamber, the second threading having a pitch less than a pitch of the first threading.

Abstract: The invention relates to a pipette comprising a housing, said housing comprising a suction chamber, said suction chamber provided with a movable piston, an adjustable, threaded retainer mechanism for retaining the piston's motion, said retainer mechanism being provided with a range adjustment threading, and a calibration mechanism for the motion of the piston. In addition, the pipette includes another adjustable, threaded retainer mechanism for retaining the motion of the piston, said retainer mechanism being provided with a fine adjustment threading with a pitch that is smaller than that of the range adjustment threading of the first retainer mechanism. According to the invention, the volume is adjusted rapidly and still accurately.

Abstract: The object of the invention is a ratchet wheel pipette having a body and in it a cylinder (3) and a piston (12) and a filling and dispensing arrangement to draw liquid into the cylinder and to dispense it in smaller portions with the aid of the piston.