FLOW REGULATING STOPCOCKS AND RELATED METHODS
First Claim
Patent Images
1. A device comprising:
- a first chamber;
a first compressible member disposed in the first chamber;
a stopcock having a second chamber for holding aliquots of flow material to be dispensed;
a second compressible member disposed in the second chamber; and
a first pressure sensor;
wherein the second chamber is filled with flow material from first chamber when stopcock is in a first position and the stopcock device only dispenses flow material when the stopcock is in the second position that is not in fluid communication with the first chamber.
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Abstract
A novel enhanced stopcock is disclosed, as well as related methods, that safely controls flow of flow materials from a pump. Pump fills a first chamber, from which a second chamber is filled. Flow material is dispensed from the second chamber when the stop cock is moved to a different position wherein it is no longer in fluid communication with the first chamber. Pressure sensors disposed in fluid communication with first and second chambers are used to determine the volume of flow material dispensed.
128 Citations
19 Claims
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1. A device comprising:
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a first chamber; a first compressible member disposed in the first chamber; a stopcock having a second chamber for holding aliquots of flow material to be dispensed; a second compressible member disposed in the second chamber; and a first pressure sensor; wherein the second chamber is filled with flow material from first chamber when stopcock is in a first position and the stopcock device only dispenses flow material when the stopcock is in the second position that is not in fluid communication with the first chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising providing a stopcock device having:
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a first chamber; a first compressible member disposed in the first chamber; a stopcock having a second chamber for holding aliquots of flow material to be dispensed; a second compressible member disposed in the second chamber; and a first pressure sensor; wherein the second chamber is filled with flow material from first chamber when stopcock is in a first position and the stopcock device only dispenses flow material when the stopcock is in the second position that is not in fluid communication with the first chamber. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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positioning a stopcock into a first position whereby a first chamber and a second chamber are in fluid communication; positioning the stopcock into a second position whereby the first chamber and the second chamber are not in fluid communication and whereby the second chamber is in fluid communication with a dispensing conduit; measuring the pressure in the second chamber with a first pressure sensor; and calculating the flow rate in about real time. - View Dependent Claims (16, 17, 18, 19)
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Specification