Labsystems Oy

Kommandiittiyhtio Finnpipette Osmo A. Suovaniemi

Aarre Kukka

Jukka Tervamaki

Osmo A Suovaniemi

Erkki Kaski

Mikael Fagerstedt

Pertti Ekholm

Esko Kaukanen

Olavi Vuorinen

Heikki Nikulin

A set of cuvettes wherein the measurement windows (5) are in the bottom of the cuvettes and surrounded by a matt-faced area (8). The matt-faced area eliminates the access of diffused light to the detector of the photometer.

Set of cuvettes

Pipette with adjustable volume

The subject of the invention is a pipette which comprises a frame portion (1) shaped as a handle, a cylinder being formed inside the frame portion (1), as well as a piston (5) fitted into the cylinder by means of a seal ring (7), a piston rod (4) connected to the piston (3), as well as a press knob (5) with shaft (6), fitted at the upper end of the frame portion (1). Around the shaft (6) of the press knob (5), a calibration sleeve (9) is fitted by means of a threaded joint (8), by means of which calibration sleeve (9) the lower limit of the movement of the piston (3) during pipetting can be determined. According to the invention, the calibration sleeve (9), as surrounded by the mantle (10) of the hollow press knob (5) and by the upper part of the pipette frame (1), is placed at a distance both from the mantle (10) of the press knob (5) and from the inner face of the cover of the upper part of the pipette frame (1). Thereby the hollow press knob (5) and the pipette frame (1) form a cover protecting from conducted heat and allow a space of air around the adjustment and calibration sleeve (9).

Thermal expansion resistant pipette

Microvette assembly

A disposable pipette tip vessel intended for use in connection with a dosage pipette. The lowest point of the tip vessel has a hole for suction of the liquid to be pipetted into the tip vessel and, correspondingly, for emptying of the tip vessel of the liquid contained therein. In the bottom part of the tip vessel around the filling and emptying hole, a plane or gently conical bottom portion has been shaped so that the tip vessel is arranged so that, between subsequent dosage steps to be performed by means of the pipette, the tip vessel allows the air column to be sucked into the bottom part of the tip vessel to rise as an air bubble or as bubbles of air above the liquid in the tip vessel, whereby the liquid column is correspondingly lowered to the bottom of the tip vessel.

Tip vessel for use in connection with a dosage pipette

Growing community of inventors

Helsinki, Finland

Aarre Kukka