Patent US4829831A successfully refreshed from Google Patents.
US4829831A
Expired / Lapsed
US
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Device for measuring flow rate in a pipe
Assignee: Siemens AG
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Filing: 1987-07-22
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Granted: 1989-05-16
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Expires: 2007-07-22
Abstract
Abstract A device for measuring flow rate of a flowing medium in a pipe having a throttling device received therein, and a meter for measuring pressure differential connected to the throttling device, including a measuring device for determining density of the medium being disposed in the flowing medium, the pressure differential meter and the measuring device for determining the density of the medium being connected to an evaluation unit for determining the flow rate from the pressure differential in the flowing medium and the density of the medium, the measuring device for determining the density of the medium being located at a section of the throttling device which has a uniformly smaller diameter than that of the pipe.
Inventors
- 👤 Volker Kefer
- 👤 Werner Kratzer
- 👤 Franz Reitbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:20
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/44; G01F1/74; G01F1/76; G01F1/86; G01F1/88
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A device for measuring flow rate of a flowing medium in a pipe having a throttling device received therein, and a meter for measuring pressure differential connected to the throttling device, comprising a measuring device for determining density of the medium being disposed in the flowing medium, the pressure differential meter and said measuring device for determining the density of the medium being connected to an evaluation unit for determining the flow rate from the pressure differential in the flowing medium and the density of the medium, said measuring device for determining the density of the medium being located at a section of the throttling device which has a uniformly smaller diameter than that of the pipe.
Claim 2
Independent Claim
117 words
A device for measuring flow rate of a flowing medium in a pipe having a throttling device received therein, and a meter for measuring pressure differential connected to the throttling device, comprising a measuring device for determining density of the medium being disposed in the flowing medium, the pressure differential meter and said measuring device for determining the density of the medium being connected to an evaluation unit for determining the flow rate from the pressure differential in the flowing medium and the density of the medium, said measuring device for determining the density of the medium being located at a section of the throttling device which has a uniformly smaller diameter than that of the pipe.
Claim 3
Dependent Claim
25 words
A device according to claim 1, wherein said measuring device for determining the density of the medium is a capacitor connected to a capacitance meter.
Claim 4
Dependent Claim
15 words
A device according to claim 2, wherein said capacitor is coated with an insulating material.
Claim 5
Dependent Claim
14 words
A device according to claim 1, wherein the throttling device is a venturi tube.
Claim 6
Dependent Claim
14 words
A device according to claim 1, wherein the throttling device is a venturi nozzle.
Claim 7
Dependent Claim
21 words
A device according to claim 1, wherein at least part of said density measuring device is disposed in the throttling device.
Claim 8
Dependent Claim
21 words
A device according to claim 1, wherein at least part of said density measuring device is disposed on the throttling device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |