Pipettes

Details Pipettes Pipettes

1976-09-20

1977-12-06

Swisher, S. Clement

Measuring and testing

Measuring vessel

B01L 302

Patent

active

040610373

ABSTRACT:
A mechanical pipette having a measuring piston that controls the volume of liquid drawn into the pipette reservoir and a substantially larger piston that assures that all of the liquid in the reservoir is expelled therefrom on a discharge stroke. On the discharge stroke, a valve is opened to admit air being compressed by the larger piston into the reservoir. Means are provided to adjust the displacement of the larger piston so as to control the pressure developed by the larger piston.

REFERENCES:
patent: 3646817 (1972-03-01), Hinchman
patent: 3834590 (1974-09-01), Robinson

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