Pipetting device having an automatic mechanism for replacing noz

Details Pipetting device having an automatic mechanism for replacing noz Pipetting device having an automatic mechanism for replacing noz

1987-05-21

1988-11-22

Thronson, Mark J.

Measuring and testing

Sampler, sample handling, etc.

Capture device

7386411, 422100, B01L 302

Patent

active

047856777

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.

REFERENCES:
patent: 4555957 (1985-12-01), Frankel et al.

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