Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Patent
1991-01-17
1992-10-27
Johnston, Jill A.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
422 63, 7386301, 222 64, 222320, B01L 302
Patent
active
051587483
ABSTRACT:
A system for automatically dispensing and diluting an accurate volume of a sample includes a nozzle tip removably mounted on a nozzle for collecting a predetermined volume of the sample. The nozzle includes an inner tube and an outer tube. The system also includes a sample pump for sucking and discharging the sample and the reagent into and out of the nozzle tip, a first three-way valve that is adapted to communicate the reagent bottle with the sample pump or the sample pump with the nozzle, and a plunger pump for sucking and discharging a liquid surface-detecting gas supplied from a gas source. A second three way valve is adapted to communicate the gas source with the plunger pump or the plunger pump with the nozzle, and a pressure sensor is positioned between the second three-way valve and the gas passage in the nozzle. Also, a two-way valve is positioned between the pressure sensor and the gas passage of the nozzle.
REFERENCES:
patent: 3607094 (1971-09-01), Beer
patent: 4096972 (1978-06-01), Bartels et al.
patent: 4478094 (1984-10-01), Salomaa et al.
patent: 4574850 (1986-03-01), Davis
patent: 4800762 (1989-01-01), Sugaya
patent: 4810659 (1989-03-01), Higo et al.
patent: 4983515 (1990-01-01), Uchida
Ishida Kohei
Mochida Ei
Obi Hiroshi
Johnston Jill A.
Mochida Pharmaceutical Co. Ltd.
Wallenhorst Maureen M.
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