Measuring and testing – Specific gravity or density of liquid or solid
Reexamination Certificate
2007-08-21
2007-08-21
Williams, Hezron (Department: 2856)
Measuring and testing
Specific gravity or density of liquid or solid
C073S019030, C073S061470, C073S061780, C073S061790
Reexamination Certificate
active
11458869
ABSTRACT:
Techniques for measuring a density of a liquid within a fluid that includes both a liquid and a gas are described. A pressure of the fluid oscillates according to a time-varying function, which causes a density of the fluid also to oscillate according to the same time-varying function. A resulting pressure signal and density signal are analyzed to extract at least a first and second pressure value and at least a first and second density value, where the first pressure and density values occur at a first time, and the second pressure and density values occur at a second time. Then, the liquid density is calculated from the first and second pressure and density values. As a result, the liquid density may be calculated quickly and easily, with a minimum of effort on the part of an operator, and without requiring disruption of other measurement processes associated with the flowtube.
REFERENCES:
patent: 4365505 (1982-12-01), Holzl
patent: 5224372 (1993-07-01), Kolpak
patent: 5295083 (1994-03-01), Yano et al.
patent: 6496781 (2002-12-01), Chen et al.
patent: 6766680 (2004-07-01), Chen et al.
patent: 2004/0206157 (2004-10-01), Chen et al.
International Search Report mailed Feb. 24, 2006 for PCT/US04/41432, filed Dec. 13, 2004.
Written Opinion mailed Feb. 24, 2006 for PCT/US04/41432, filed Dec. 13, 2004.
Mattar Wade M.
Vignos James H.
Fish & Richardson P.C.
Fitzgerald John
Invensys Systems Inc.
Williams Hezron
LandOfFree
Densitometer with pulsing pressure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Densitometer with pulsing pressure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Densitometer with pulsing pressure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3848526