Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Patent
1994-10-21
1995-12-12
Housel, James C.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
422 63, 422 81, 422103, 436 43, 436 49, 436150, 7386422, 134169R, 134170, G01N 3510, B08B 304
Patent
active
054747449
ABSTRACT:
An automatic pipetting device comprising only one pipetting needle having a tip end and an open end. The device comprises a metering syringe having an outlet. The device also comprises a mechanism for cleaning the pipetting needle with a cleaning fluid when the pipetting needle is positioned in a cleaning position. The mechanism comprises a plunger pump, a second tube having a first end and a second end, a first valve, a second valve, and a third tube having a first end and a second end, the second end of the tubing immersed in a cleaning fluid. The second end of the first tube is in fluid communication with both the outlet of the metering syringe and the first valve. The first end of the second tube is in fluid communication with the first valve. The second end of the second tube is in fluid communication with both the plunger pump and the second valve. The first end of the third tube is in fluid communication with the second valve. The mechanism for cleaning the pipetting needle is operated to activate the plunger pump and for opening and closing the first valve and the second valve, so as to establish a predetermined pressure of cleaning fluid in the second tube while the first and second valves are closed and subsequently to force the cleaning fluid through the pipetting needle while the first valve is open and the second valve is closed.
REFERENCES:
patent: 3266322 (1966-08-01), Negersmith et al.
patent: 3911749 (1975-10-01), Hendry
patent: 3912456 (1975-10-01), Young
patent: 4318885 (1982-03-01), Suzuki et al.
patent: 4457184 (1984-07-01), Shiono
patent: 4516437 (1985-05-01), Pedroso et al.
patent: 4635665 (1987-01-01), Namba et al.
patent: 4730631 (1988-03-01), Schwartz
patent: 4820497 (1989-04-01), Howell
patent: 4926701 (1990-05-01), Tompkins
patent: 4948563 (1990-08-01), Kanewske, III
patent: 5133373 (1992-07-01), Hoffman et al.
patent: 5186194 (1993-02-01), Kitajima
Japanese Abstract vol. No. 6, No. 62 (P-111) (1982).
Japanese Abstract vol. No. 6, No. 229 (P-155) (1982).
Gould George M.
Hoffmann-La Roche Inc.
Housel James C.
Johnston George W.
Le Long V.
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