Abstract: A hand-held pipette is disclosed including a pipette tip, a piston, and a voice recognition and control system. The pipette tip is provided at one end of an elongated enclosure. The piston is received in an opposite end of the elongated enclosure. The piston is adapted for reciprocal movement within at least a portion of the elongated enclosure through a selected first stroke to aspirate a first volume of fluid into the pipette tip and to expel the thus aspirated first volume of fluid out of the pipette tip. The voice recognition and control system is for automatically adjusting the stroke of the piston from the first stroke to a second stroke responsive to voice commands such that a second volume of fluid may be aspirated into the pipette tip and the thus aspirated second volume of fluid may be expelled out of the pipette tip.

Abstract: A hand-held pipettor comprising a piston received in one end of a cylinder, a pipettor tip removably secured to an opposite end of said cylinder, means for reciprocating said piston through a selected stroke to aspirate fluid into and to expel the thus aspirated fluid from said pipettor tip, mutually spaced stop members operatively associated with said manually driven means for defining the range of said stroke and motor driven means for varying the spacing between said stop members to thereby vary the volume of fluid being aspirated into and expelled from said pipettor tip.