Hand-held micropipettor with fluid transfer volume adjustment me

Details Hand-held micropipettor with fluid transfer volume adjustment me Hand-held micropipettor with fluid transfer volume adjustment me

1977-06-15

1978-06-27

Swisher, S. Clement

Measuring and testing

Measuring vessel

222 43, B01L 302

Patent

active

040967514

ABSTRACT:
A micropipettor having an adjustable stop threadedly engaged with an internal reciprocal plunger assembly for defining the stroke length of the plunger and thus of a fluid displacing piston that is attached to the plunger assembly. The adjustable stop is manipulated by operable connection with a volume adjustment knob provided on the outside of the micropipettor body. The plunger carries a coarse volume indicating scale and the volume adjustment knob is provided with a fine volume setting scale. Accidental changes in volume adjustments are avoided by two types of automatic locks: a frictional engagement of the internal volume adjustment mechanism unless the plunger is deliberately placed in a certain position by the operator, and a detent lock of the volume adjustment knob unless the operator deliberately depresses it.

REFERENCES:
patent: 3327900 (1967-06-01), Goda
patent: 3810391 (1974-05-01), Souvaniemi
patent: 3827305 (1974-08-01), Gilson

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