Pipetting device having an automatic mechanism for replacing nozzle tips
AssigneeToyo Soda Manufacturing Co., Ltd.
InventorYuji Higo
Life of this patent
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Abstract
A pipetting device is formed of a supporting frame, a slider mounted on the supporting frame for vertical movement, a plunger type stem having a lower end fittable within the upper end of an approximately inverted cone shaped nozzle tip, the stem being mounted for vertical movement on the slider, and a conduit for supplying the lower end of the stem with an air supply and exhaust device so that the nozzle tip may be communicated with air or air may be sucked therefrom. A rotating cam cooperates with a pin on the slider for vertically moving the slider by a large stroke. An air cylinder has a piston fixed relative to the stem for vertically moving the stem by a small stroke. A lever loosely mounted on the lower end of the stem can engage the nozzle tip for removing the nozzle tip from the stem.
Claims9
A pipetting device comprising:
- a supporting frame;
- a slider mounted on said supporting frame for vertical movement;
- first power driving means for vertically moving said slider by a large stroke;
- a plunger type stem having a lower end fittable within the upper end of an approximately inverted cone shaped nozzle tip, said stem being mounted for vertical movement on said slider;
- means for communicating said lower end of said stem with an air supply and exhaust means, whereby said nozzle tip may be supplied with air or air may be sucked therefrom;
- and
- second power driving means independent from said first power driving means for vertically moving said stem in two directions on said slider by a small stroke as compared to said large stroke.
Dependencies are inferred from the claim text.