Patent US3934473A successfully refreshed from Google Patents.
US3934473A
Expired / Lapsed
US
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Fluid flow meter with counter rotating turbine impellers
Assignee: Individual
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Filing: 1974-06-12
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Granted: 1976-01-27
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Expires: 1994-06-12
Abstract
Abstract A fluid flow meter with two independantly counter rotating turbine impellers is disclosed in which fluid characteristics and/or upstream flow disturbances cause minimal variations in volume flow rate measurements by the meter as a result of fluidynamic interaction between the impellers. The angular velocities of each of the impellers are sensed in a conventional manner after which the velocity signals are added to indicate a total volume thruput, and/or rate of flow, and optionally compared to indicate an occurance of mechanical or electronic degradation.
Inventors
- 👤 Joseph B. Griffo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:11
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/115
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
141 words
A meter for measuring fluid flow comprising: a. A fluid conduit; b. shaft support means mounted within said conduit; c. a shaft axially mounted on said shaft support means; d. a first turbine impeller having a plurality of blades rotatably mounted in said conduit on said shaft; e. a second turbine impeller having a plurality of blades rotatably mounted in said conduit on said shaft, said second turbine impeller mounted proximate and downstream from said first turbine impeller, said second turbine impeller free to respond to any fluidynamic aberration developed from said first turbine impeller, said second turbine impeller arranged to rotate in a direction opposite that of said first turbine impeller; f. first sensing means for sensing the angular velocity of said first turbine impeller; and g. second sensing means for sensing the angular velocity of said second turbine impeller.
Claim 2
Dependent Claim
141 words
A meter for measuring fluid flow comprising: a. A fluid conduit; b. shaft support means mounted within said conduit; c. a shaft axially mounted on said shaft support means; d. a first turbine impeller having a plurality of blades rotatably mounted in said conduit on said shaft; e. a second turbine impeller having a plurality of blades rotatably mounted in said conduit on said shaft, said second turbine impeller mounted proximate and downstream from said first turbine impeller, said second turbine impeller free to respond to any fluidynamic aberration developed from said first turbine impeller, said second turbine impeller arranged to rotate in a direction opposite that of said first turbine impeller; f. first sensing means for sensing the angular velocity of said first turbine impeller; and g. second sensing means for sensing the angular velocity of said second turbine impeller.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein said first turbine impeller is integral with said shaft, said shaft rotates on said support means, and said second turbine impeller rotates on said shaft.
Claim 4
Dependent Claim
31 words
The apparatus of claim 1 wherein said second turbine impeller is integral with said shaft, said shaft rotates on said support means, and said first turbine impeller rotates on said shaft.
Claim 5
Dependent Claim
38 words
The apparatus of claim 1 wherein said first and second sensing means produce electrical signals and wherein said apparatus further includes means to add said signals to produce an indication of the fluid flow range through said meter.
Claim 6
Dependent Claim
32 words
The apparatus of claim 1 wherein said first and second sensing means produce electrical signals and wherein said apparatus further includes means to compare said signals to produce an indication of malfunction.
Claim 7
Dependent Claim
18 words
The apparatus of claim 4 further including means to compare said signals to produce an indication of malfunction.
Claim 8
Dependent Claim
24 words
The apparatus of claim 5 further including alarm means coupled with said means to compare said signals to produce a warning of said malfunction.
Claim 9
Dependent Claim
24 words
The apparatus of claim 6 further including alarm means coupled with said means to compare said signals to produce a warning of said malfunction.
Claim 10
Dependent Claim
167 words
A meter for measuring fluid flow comprising: a. a fluid conduit; b. a first shaft support means mounted within said conduit; c. a second shaft support means mounted within said conduit; d. a first shaft axially mounted on said first shaft support means; e. a second shaft axially mounted on said second shaft support means; f. a first turbine impeller having a plurality of blades rotatably mounted in said conduit on said first shaft; g. a second turbine impeller having a plurality of blades rotatably mounted in said conduit on said second shaft, said second turbine impeller mounted proximate and downstream from said first turbine impeller, said second impeller free to respond to any fluidynamic aberration developed from first turbine impeller, said second turbine impeller arranged to rotate in a direction opposite that of said first turbine impeller; h. first sensing means for sensing the angular velocity of said first turbine impeller; and i. second sensing means for sensing the angular velocity of said second turbine impeller.
Claim 11
Dependent Claim
167 words
A meter for measuring fluid flow comprising: a. a fluid conduit; b. a first shaft support means mounted within said conduit; c. a second shaft support means mounted within said conduit; d. a first shaft axially mounted on said first shaft support means; e. a second shaft axially mounted on said second shaft support means; f. a first turbine impeller having a plurality of blades rotatably mounted in said conduit on said first shaft; g. a second turbine impeller having a plurality of blades rotatably mounted in said conduit on said second shaft, said second turbine impeller mounted proximate and downstream from said first turbine impeller, said second impeller free to respond to any fluidynamic aberration developed from first turbine impeller, said second turbine impeller arranged to rotate in a direction opposite that of said first turbine impeller; h. first sensing means for sensing the angular velocity of said first turbine impeller; and i. second sensing means for sensing the angular velocity of said second turbine impeller.
Claim 12
Dependent Claim
35 words
The apparatus of claim 9 wherein said first turbine impeller is integral with said first shaft, said first shaft rotates on said first support means, and said second turbine impeller rotates on said second shaft.
Claim 13
Dependent Claim
24 words
The apparatus of claim 9 wherein said second turbine impeller is integral with said second shaft, said second shaft rotates on said first shaft.
Claim 14
Dependent Claim
38 words
The apparatus of claim 9 wherein said first and second sensing means produce electrical signals and wherein said apparatus further includes means to add said signals to produce an indication of the fluid flow rate through said meter.
Claim 15
Dependent Claim
32 words
The apparatus of claim 9 wherein said first and second sensing means produce electrical signals and wherein said apparatus further includes means to compare said signals to produce an indication of malfunction.
Claim 16
Dependent Claim
18 words
The apparatus of claim 9 further including means to compare said signals to produce an indication of malfunction.
Claim 17
Dependent Claim
24 words
The apparatus of claim 13 further including alarm means coupled with said means to compare said signals to produce a warning of said malfunction.
Claim 18
Dependent Claim
24 words
The apparatus of claim 14 further including alarm means coupled with said means to compare said signals to produce a warning of said malfunction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |