Patent ID: 6428750
Filing Date: 2002-08-06
Classification: B01L,Y10T

Abstract:
A volume adjustable manual pipette, comprising:an axially elongated hand-holdable housing supporting (i) an electronic digital display and associated position sensing and control circuitry, (ii) a plunger unit and (iii) a quick set volume adjustment mechanism for simultaneously controlling the volume setting of the pipette and the electronic display, the quick set volume adjustment mechanism comprising: a pipette volume setting member for limiting upward movement of the plunger unit within the housing to define the volume setting for the pipette, the volume setting member being supported for axial movement on the plunger unit and a pipette user operable locking mechanism releasably securing the volume setting member relative to the housing such that when the volume setting member is released from the housing the volume setting member is axially moveable on and with the plunger unit to quickly set the volume for the pipette and when the volume setting member is secured to the housing the plunger unit is axially moveable relative to the volume setting member to aspirate and dispense liquid into and from a pipette tip secured to a hollow shaft extending from a lower end of the housing; and the sensing and control circuitry monitoring the volume setting to provide a real time display of the volume setting of the pipette on the electronic digital display.