Dispensing – Processes of dispensing
Patent
1995-03-10
1995-11-07
Shaver, Kevin P.
Dispensing
Processes of dispensing
137115, 222397, B65D 8300
Patent
active
054641217
ABSTRACT:
A precision liquid reagent fluid dispensing apparatus (10) and method includes a continuously operating pump (16) inducting and pressurizing ambient air. The pressurized air is delivered at a first location into a flow-through volume (18) with provision to substantially completely abate at a second location any noncontinuous air flow or air pressure variations from the pump. A long-lived pressure sensor (32) which is substantially free of drift is associated with the flow through volume at a third location and provides a signal indicative of sensed air pressure. A controller (36) by reference to a calibration standard for the sensor provides a time-variant control signal in response to the sensed air pressure. At a forth location a duty cycle valve (38) vents pressurized air from the flow through volume in response to the control signal to provide at the second location a precisely regulated dispensing air pressure. The dispensing air pressure is applied via a reagent liquid container (46) and closure member (62) to a liquid reagent to pressurize this reagent for dispensing at a precise rate via a dispensing valve (82). The dispensing valve is sealingly carried by the closure member to reduce leakage paths and corrosion opportunities in the apparatus of the present invention.
REFERENCES:
patent: 4111223 (1978-09-01), Gelnett
patent: 4291612 (1981-09-01), Day
patent: 4456025 (1984-06-01), Childs
patent: 4482509 (1984-11-01), Iannelli
patent: 4537648 (1985-08-01), Shiino et al.
patent: 4589436 (1986-05-01), Schebler et al.
patent: 4836241 (1989-06-01), Schoenwald
patent: 4893646 (1990-01-01), Wimmer
patent: 4994180 (1991-02-01), Sims et al.
patent: 4997459 (1991-03-01), Pelkey
R. L. Jolley et al., "Nonpulsing Reagent Metering for Continuous Colorimetric Detection Systems", Analytical Biochemistry, 28:300-306, 1969.
Dade International Inc.
MacLean Kurt A.
Shaver Kevin P.
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