ApplicationNo. 07/006701 filed on 01/22/1987
US Classes:73/864.87, Syringe with connector422/100, Pipette or other volumetric fluid transfer means422/928, Repeating pipettes, i.e. for dispensing multiple doses from a single charge [B01L 3/02C3R]73/864.18Plural or adjustable limit stops
ExaminersPrimary: Levy, Stuart S.
Assistant: Raevis, Robert
Attorney, Agent or Firm
International ClassB01L 3/02 (20060101)
AbstractAn adjustable volume pipette sampler and pressure-generating device comprises a barrel slidably and rotatably containing a cross-shaped plunger of radial flanges which is manually rotatable around its axis in the barrel, at least one of the radial flanges having open-ended slots or notches. A stop disc is rigidly secured on the top flange of the barrel in such a manner that it does not interfere with the vertical motion of the plunger shaft when its axial position is such that adjacent flanges of the plunger straddle the stop disc. Otherwise, the stop disc cooperates within the notches to stop vertical movement of the plunger at a selected position corresponding top a selected pipette volume.