Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Patent
1977-12-16
1979-05-01
Serwin, R. E.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
73422R, G01N 114
Patent
active
041523911
ABSTRACT:
A liquid transfer valve assembly capable of measuring and transferring plural different volumes from a sample source to defined flow paths under the influence of pressurized fluid. The preferred valve assembly includes a pair of stationary outer disc members and a movable inner disc member sandwiched therebetween, their facing surfaces sealingly frictionally engaged. Each of the discs has a central axial passage arranged for mounting on a spindle, with the sandwiched disc having a radial pin entering its axial passage for cooperation with a slotted spindle, the rotation of the spindle rotating only said sandwiched disc relative between a pair of positions. The center disc carries at least a segmenting bore pair, at least one of the bores being a measuring passage and having a precise volume. A matching port pair is provided in each of the outer discs defining flow paths through the valve arranged selectively to be intercepted by said measuring bore of the segmenting bore pair. The center disc also carries at least one exterior sample loop sealingly fixedly secured thereto and communicating to passageways formed in the disc. A flow path also is defined in said center disc to communicate to the face of said disc opposite to the face from which the exterior sample loop extends, said flow path may take the form of an internal passageway formed interior of the center disc and opening to said opposite face, or, may take the form of a groove. Plural sets of ports are formed in one of the outer discs to establish flow paths communicating to the hollow loop member in one position of the valve and to the flow path in the other condition of the valve. The other outer disc includes a generally arcuate slot for accommodating the sample loop therethrough in assembled condition of the valve, the slot being generally arcuate but including a flat wall portion to accommodate the hollow loop during the movement thereof with movement of the center disc. The center disc is provided with a circumferential notch cooperating with a mounting post to limit the extent of movement of said disc between positions. Proper establishment of the respective flow paths in the two operating positions of the valve is assured. A second external hollow loop is described and is associated with a further flow path in the center disc. Likewise, associated port sets are formed in said other outer disc to establish communication to said second sample loop in one condition of the valve. Each of the loops are of precise internal volume; each serving to measure and to transfer its liquid segment of precise volume to a selected destination. The said further flow path is established as a gallery in the form of an arcuate groove.
REFERENCES:
patent: 3567389 (1971-03-01), Coulter et al.
patent: 3567390 (1971-03-01), Rothermel
patent: 3652228 (1972-03-01), Bernard
patent: 3976429 (1976-08-01), Ginsberg
patent: 3990853 (1976-11-01), Godin
patent: 3991055 (1976-11-01), Godin et al.
Coulter Electronics Inc.
Serwin R. E.
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