Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1982-06-08
1984-08-21
Goldberg, Gerald
Measuring and testing
Sampler, sample handling, etc.
Capture device
222309, 422100, B01L 302
Patent
active
044662980
ABSTRACT:
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).
REFERENCES:
patent: 3882729 (1975-05-01), Roach
patent: 4141251 (1979-02-01), Oshikubo
patent: 4284604 (1981-08-01), Tervamaki
patent: 4294125 (1981-10-01), Lee
Fagerstedt Mikael
Kaski Erkki
Kukka Aarre
Tervamaki Jukka
Goldberg Gerald
Labsystems Oy
Noland Tom
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