US Patent No: 5,343,764
Number of patents in Portfolio can not be more than 2000
Coriolis-type mass flowmeter
Stats
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Sep 6, 1994
Issued date -
Apr 30, 1992
filing date -
07/879,156
serial no -
In Force
status
Importance
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Abstract
A rigid central manifold block defines a coaxial inlet and outlet of the flowmeter and supports at least one continuous conduit loop substantially encircling the block and having its inlet and outlet ends closely spaced and rigidly connected to the block. Preferably, the loop includes a straight section perpendicular to the inlet and outlet ends. Dual drive means are preferably provided for oscillating the straight section back and forth about its perpendicular bisector and complementary position detectors employed at or near the opposite ends of the straight section, preferably at the same location as the drive units, provide readouts which are combined algebraically and synchronously demodulated to yield a Coriolis-related output indicative of mass flow. Preferably, a second loop, identical and parallel to the first, is supported by the same block. The block is channeled to serve as a manifold and interchangeable manifolds are disclosed for series and parallel flow through the two loops, respectively. The plane of the loop or loops can be oriented perpendicular or parallel (in line) to the process line.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
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| RE31450 Method and structure for flow measurement | 97 | 1982 | |
| 4,491,025 Parallel path Coriolis mass flow rate meter | 128 | 1982 | |
| 4,491,009 Electronic circuit for vibrating tube densimeter | 20 | 1983 | |
| 4,660,421 Apparatus for mass flow rate and density measurement | 44 | 1985 | |
| 4,768,385 Parallel path Coriolis mass flow meter | 20 | 1986 | |
| 4,817,448 Auto zero circuit for flow meter | 53 | 1986 | |
| 4,756,198 Sensor apparatus for mass flow rate measurement system | 31 | 1987 | |
| 4,823,613 Density insensitive coriolis mass flow rate meter | 32 | 1988 | |
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| 4,733,569 Mass flow meter | 31 | 1985 | |
| 4,782,711 Method and apparatus for measuring mass flow | 40 | 1986 | |
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| 4,691,578 Coriolis-type mass flowmeter | 26 | 1986 | |
| 4,756,197 Coriolis-type mass flowmeter | 23 | 1987 | |
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| 4,622,858 Apparatus and method for continuously measuring mass flow | 42 | 1985 | |
| 4,763,530 Apparatus and method for continuously measuring mass flow | 8 | 1986 | |
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| 4,784,000 Magnetic flowmeter coil driver and method | 13 | 1987 | |
| 4,784,001 Magnetic flowmeter with isolation amplifier and ranging circuit therefor and method | 10 | 1987 | |
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| 4,192,184 Mass flowmeter | 31 | 1978 | |
| 4,311,054 Mass flowmeter with sensor gain control | 32 | 1980 | |
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| 4,187,721 Method and structure for flow measurement | 69 | 1978 | |
| 4,252,028 Method and apparatus for measuring flow | 33 | 1979 | |
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| 4,559,833 Meter for measuring mass flow rate | 23 | 1984 | |
| 4,655,089 Mass flow meter and signal processing system | 32 | 1985 | |
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| 4,793,192 Electromagnetic pulse receiver for a flow meter | 14 | 1986 | |
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| 4,680,974 Mass flow meter on the coriolis principle | 35 | 1986 | |
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| 4,470,294 Method and apparatus for simultaneous determination of fluid mass flow rate, mean velocity and density | 18 | 1982 | |
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| 4,781,069 Mode selection apparatus for multiple tube coriolis type mass flow meters | 18 | 1986 | |
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| 4,747,312 Double-loop Coriolis type mass flowmeter | 45 | 1987 | |
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| 4,891,991 Coriolis-type mass flowmeter | 53 | 1986 | |
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| 4,716,771 Symmetrical mass flow meter | 26 | 1986 | |
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| 4,422,338 Method and apparatus for mass flow measurement | 90 | 1981 | |
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| 4,381,680 Mass flow meter | 14 | 1980 | |
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| 4,444,059 Oscillating tube mass flow rate meter | 18 | 1982 | |
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| 4,703,660 Apparatus and method for continuously measuring mass flow | 17 | 1986 | |
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| 4,658,657 Mass flow meter | 16 | 1985 | |
| 4,628,744 S-tube Coriolis force flow meter | 28 | 1985 | |
| 4,823,614 Coriolis-type mass flowmeter | 100 | 1986 | |
| 4,759,223 Fluid mass flow meter | 8 | 1986 | |
| 4,798,091 Dual S-tube Coriolis force flowmeter | 16 | 1986 | |
| 4,831,885 Acoustic wave supressor for Coriolis flow meter | 39 | 1987 | |