Abstract: The present invention concerns a pipette comprising a mechanism with which the stroke length of a piston can be changed by rotating the piston rod. The pipette comprises a locking mechanism which prevents the rotation of the piston rod when the piston has been pushed a certain distance downwards from its upper position, but does not prevent the rotation when the piston is in its upper position.

Abstract: The present invention concerns a pipette comprising a mechanism with which the stroke length of a piston can be changed by rotating the piston rod. The pipette comprises a locking mechanism which prevents the rotation of the piston rod when the piston has been pushed a certain distance downwards from its upper position, but does not prevent the rotation when the piston is in its upper position.

Abstract: A handle pipette including at least one cylinder with an upper end and a lower end, said cylinder having a movable piston, an elongate handle (1), by which the pipette can be manually gripped, said handle having an upper part, and in the upper part of the handle, a sideways extending finger support (7), which finger support (7) is at least partly flexible and/or it can be shaped by the user.

Abstract: A handle pipette including at least one cylinder with an upper end and a lower end, said cylinder having a movable piston, an elongate handle (1), by which the pipette can be manually gripped, said handle having an upper part, and in the upper part of the handle, a sideways extending finger support (7), which finger support (7) is at least partly flexible and/or it can be shaped by the user.

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 including a cylinder part having a cylinder and a tip part, which includes a tip channel connected to the cylinder and a movable piston tightly fit within the cylinder for aspirating liquid into and removing liquid from the tip container attached to the cylinder. In the pipette at least the tip part is made of an elastic material, such as rubber. The tip container can thus be easily and reliably fixed to and removed from the tip container.

Abstract: The invention relates to an electric pipette (1) comprising a body (2), a tip part (4), a hook part (5), a push-button part (6) and a display part (7), said body (1) having a vertical axis (3) and at least one of the parts selected from the group consisting of the hook part (5), the push-button part (6) and the display part (7) is rotatable about the vertical axis (3) of the electric pipette (1) correspondingly by an angle ?1, ?2 or ?3.

Abstract: The invention relates to an electric pipette (1) comprising a body (2), a tip part (4), a hook part (5), a push-button part (6) and a display part (7), said body (1) having a vertical axis (3) and at least one of the parts selected from the group consisting of the hook part (5), the push-button part (6) and the display part (7) is rotatable about the vertical axis (3) of the electric pipette (1) correspondingly by an angle ?1, ?2 or ?3.

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 cylinder part (1) having a cylinder (2) and a tip part (3), which comprises a tip channel (4) connected to the cylinder and a movable piston (5) tightly fitted within the cylinder for aspirating liquid into a removing liquid from the tip container and attached to the cylinder. The pipette unit of the invention is characterised by at least the tip part (3) being made of an elastic material, such as rubber. The tip container can thus be easily and reliably fixed to and removed from the tip container.

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 patent application discloses a multi-cylinder pipette (1). The pipette specifically comprises 16 4.5 mm spaced channels (5), being thus suitable for use with a plate comprising equally spaced 16.times.24 wells. The set of cylinders of the pipette has been assembled from separate elements. A set of cylinders composed of elements provides ease of manufacture. Moreover, the same element and other components can be assembled to provide various pipettes.

Abstract: The invention relates to a pipette used for dosing of liquids. The most characteristic feature of the pipette is that in order to remove the liquid as completely as possible, the dosing piston (18) is pressed first into a low position below the basic position, after which an additional removing phase is carried out using a separate removing piston (13), so that the piston area that affects the liquid container (3) is greater during the additional removing phase. This way, a pressure stroke is formed, which effectively and reliably removes even the droplet that easily remains at the tip of the container. Most preferably, both the removing piston and the dosing piston move in the additional removing phase.

Abstract: A jet part pipette includes a body having an upper end and a lower end, the body having a longitudinal opening therein. A jet part is connected at the lower end of the body, and has an upper portion and a lower end. A replaceable jet container is connected to the lower end of the jet part, and has a lower element having a longitudinal opening therein. A movable rod extends through the jet part and through the longitudinal opening in the body, and has a manually operable upper end and a lower end engaging the lower element of the replaceable jet container for drawing liquid therein. A replaceable cover surrounds the upper portion of the jet part, and has a first end portion and a second end portion, the first end portion of the replaceable cover being detachably connected to an outer periphery of the upper portion of the jet part. The lower end of the jet part extends beyond the second end of the replaceable cover.

Abstract: A positive-displacement pipette is provided comprising a longitudinally extending body portion having a bore passing therethrough, a hand grip portion disposed at one end of the body, and a tip portion coupled to and coaxially extending from the hand-grip portion. A cylinder is employed connected to and extending coaxially from the tip portion of the pipette, wherein the cylinder has a jet at its bottom end and a piston rod extending through the cylinder to the jet. A gripping arm in the form of a slidable sleeve is movably supported within the bore of the body and is adapted for gripping the piston rod by force applied to the slidable sleeve to thereby cause the sleeve to attach itself to the piston rod by friction. A device located on the hand grip portion of the body is provided for applying force to the slidable sleeve and hence to the piston rod extending through the cylinder to the jet.

Abstract: Dosage equipment, which includes a peristaltic pump for the dosage of liquid. The set of hoses (17) of the peristaltic pump includes an upper piece (18) and a lower piece (19). The body of the pump includes an attaching piece (13), to which the upper piece and the lower piece can be attached.

Abstract: The invention relates to a pipette in which a piston is reciprocated in a cylinder by means of an electric motor. The pipette is preferably provided with a volume adjustment nut comprising locking mechanism to prevent accidental volume adjustment. According to another preferable embodiment the pipette is provided with contact switches for automatically stopping the motor. According to a third preferable embodiment the pipette comprises a cylinder assembly comprising a mechanism for ejecting a tip reservoir of the cylinder.