PIPETTOR STROKE CONTROL MECHANISM

A pipette assembly for drawing and discharging liquid having a stroke control mechanism that produces a shorter stroke during liquid intake than on liquid discharge to assure complete fluid discharge, the control mechanism including an indexing sleeve carried by a main piston in the pipette, with th...

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1. Verfasser: WALKER C,US
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A pipette assembly for drawing and discharging liquid having a stroke control mechanism that produces a shorter stroke during liquid intake than on liquid discharge to assure complete fluid discharge, the control mechanism including an indexing sleeve carried by a main piston in the pipette, with the sleeve having opposed, axially disposed sets of flexible fingers in annular array that engage cams to positively rotate the indexing member in one direction in step-by-step fashion, bringing high and low stops on the indexing member selectively into engagement with abutments within the pipette.