Phase pipette

Details Phase pipette Phase pipette

1996-04-10

1997-12-09

Raevis, Robert

Measuring and testing

Sampler, sample handling, etc.

Capture device

B01L 302

Patent

active

056963300

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.

REFERENCES:
patent: 3646817 (1972-03-01), Hinchman et al.
patent: 3834590 (1974-09-01), Robinson et al.
patent: 3935734 (1976-02-01), Keegan
patent: 4061037 (1977-12-01), Keegan
patent: 4284604 (1981-08-01), Tervamaki
patent: 5104624 (1992-04-01), Labriola
European Search Report No. 96660008.2 dated May 8, 1996.

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