US4142413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for improving the flow profile in a gas line
Assignee: Nederlandse Gasunie NV
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Filing: 1977-06-06
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Granted: 1979-03-06
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Expires: 1997-06-06
Abstract
Abstract Flow straightener for improving the flow profile in a gas line ahead of a flowmeter, comprising at least three plates with regularly distributed perforations and spaced apart parallel to each other perpendicularly to the axis of the line. The perforated plates are mounted with a circumferential sealing (preferably welded) in or on a sleeve which can be inserted in the line with a sliding fit.
Inventors
- 👤 Hendrik Bellinga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:45
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; F15D1/04; G; G01; G01F; G01F15/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A device for improving the flow profile in a gas line ahead of a flow meter, the said device comprising three plates with regularly distributed perforations, said plates being spaced apart parallel to each other at a distance approximately equal to half of the internal diameter of said line and disposed perpendicular to the axis of the line, said perforated plates being mounted in said line with a circumferential sealing in or on a sleeve which can be inserted in said line with a sliding fit, with the total surface area of the perforations in each separate plate equaling 15-25% of the ree sectional area of said line.
Claim 2
Independent Claim
108 words
A device for improving the flow profile in a gas line ahead of a flow meter, the said device comprising three plates with regularly distributed perforations, said plates being spaced apart parallel to each other at a distance approximately equal to half of the internal diameter of said line and disposed perpendicular to the axis of the line, said perforated plates being mounted in said line with a circumferential sealing in or on a sleeve which can be inserted in said line with a sliding fit, with the total surface area of the perforations in each separate plate equaling 15-25% of the ree sectional area of said line.
Claim 3
Dependent Claim
11 words
A device according to claim 1 installed behind a reducing valve.
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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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |