Dispensing device with syringe driving compensator for flexible

Details Dispensing device with syringe driving compensator for flexible Dispensing device with syringe driving compensator for flexible

1995-03-15

1997-01-14

Le, Long V.

Chemistry: analytical and immunological testing

Automated chemical analysis

Condition or time responsive

422 67, 422 81, 422100, 422116, 436 49, 436 54, 436 55, 436180, 7386411, 222 52, 222 63, 134 88, 134 2211, G01N 3510

Patent

active

055938930

ABSTRACT:
A dispensing device having a flexible tube provided with a pipetting nozzle at an end, a washing solution supplier supplying washing solution to the flexible tube and the pipetting nozzle, a syringe connected to another end of the flexible tube and a control section for controlling the driving of the syringe. The control section of the present invention includes a syringe driving compensator by which the washing solution is supplied into or discharged out of the syringe in an amount compensate for the variation in the inner volume of the tube caused by reduction in the liquid pressure when the washing solution is transmitted from the washing solution supplier into the flexible tube. The liquid surface of the washing solution contained in the pipetting nozzle is maintained at a constant level by actuating the driving compensator in response to the completion of washing of the pipetting nozzle with the washing solution.

REFERENCES:
patent: 4457184 (1984-07-01), Shiono
patent: 4459267 (1984-07-01), Bunce et al.
patent: 4586546 (1986-05-01), Mezei et al.
patent: 4926701 (1990-05-01), Tompkins
patent: 5133373 (1992-07-01), Hoffman et al.
patent: 5186194 (1993-02-01), Kitajima
patent: 5216926 (1993-06-01), Lipscomb

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