US3889537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venturi arrangement
Assignee: General Electric Co
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Filing: 1973-10-11
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Granted: 1975-06-17
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Expires: 1993-10-11
Abstract
Abstract In a fluid flow rate measuring arrangement for use in relatively large pressure pipes, the inlet and throat sections of a venturi are formed integrally with a section of pipe wherein a pressure tap in the throat section of the venturi is communicated to the exterior of the pipe by a passage through the solid metal of the section of pipe whereby internal pressure tubes are eliminated.
Inventors
- 👤 Kamel Ahmad Khuzaie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:00
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
215 words
For use in a pipe line for conducting a flow of fluid, a flanged section of pipe for removable connection in said pipe line and a venturi formed in said section of pipe comprising: a convergent inlet section and a throat section of said venturi formed integrally with a flange, said flange having an outside diameter greater than the outside diameter of said pipe and an inside diameter substantially equal to the inside diameter of said pipe, said throat section having an inside diameter less than the inside diameter of said pipe, said flange being welded to an upstream end of said section of pipe; a pressure tap formed in the inner surface of said throat section and connected by a passage through said flange to an exterior surface of said flange; and a divergent diffuser section having a small-diameter inlet end welded to said throat section and having a larger diameter outlet end spaced from an inner surface of said pipe at a given ambient temperature, said diffuser section being formed of a metal having a higher thermal coefficient of expansion than the metal of which said pipe is formed whereby at an operating temperature greater than said ambient temperature said outlet end of said diffuser section contacts said inner surface of said pipe.
Claim 2
Dependent Claim
215 words
For use in a pipe line for conducting a flow of fluid, a flanged section of pipe for removable connection in said pipe line and a venturi formed in said section of pipe comprising: a convergent inlet section and a throat section of said venturi formed integrally with a flange, said flange having an outside diameter greater than the outside diameter of said pipe and an inside diameter substantially equal to the inside diameter of said pipe, said throat section having an inside diameter less than the inside diameter of said pipe, said flange being welded to an upstream end of said section of pipe; a pressure tap formed in the inner surface of said throat section and connected by a passage through said flange to an exterior surface of said flange; and a divergent diffuser section having a small-diameter inlet end welded to said throat section and having a larger diameter outlet end spaced from an inner surface of said pipe at a given ambient temperature, said diffuser section being formed of a metal having a higher thermal coefficient of expansion than the metal of which said pipe is formed whereby at an operating temperature greater than said ambient temperature said outlet end of said diffuser section contacts said inner surface of said pipe.
Claim 3
Dependent Claim
31 words
The venturi of claim 1 wherein said diffuser section of said venturi has a length of about four times its minimum inside diameter and an angle of divergence of about 13*.
Claim 4
Dependent Claim
26 words
The venturi arrangement of claim 1 wherein said diffuser section is formed of stainless steel and wherein said section of pipe is formed of carbon steel.
Claim 5
Dependent Claim
250 words
For use in a pipe line for conducting a flow of fluid, a length of pipe having a venturi formed therein and adapted for connection in said pipe line by welding comprising: a first section of said length of pipe having an upstream end and a downstream end and having inside and outside diameters substantially equal to those of the pipe of said pipe line and a convergent inlet section and a throat section of said venturi formed intEgrally with said first pipe section, said throat section having an inside diameter less than the inside diameter of said first pipe section; a pressure tap formed in the inner surface of said throat section and connected by a passage through said integral throat section and first pipe section to an exterior surface of said first pipe section; a second section of said length of pipe having an upstream end and a downstream end, said upstream end being welded to said downstream end of said first section, and a divergent diffuser section of said venturi having an inlet end welded to said throat section and an outlet end spaced from an inner surface of said second pipe section at a given ambient temperature, said diffuser section being formed of a metal having a high thermal coefficient of expansion than the metal of which said section is formed whereby at an operating temperature greater than said ambient temperature said outlet end of said diffuser section contacts said inner surface of said second section.
Claim 6
Dependent Claim
250 words
For use in a pipe line for conducting a flow of fluid, a length of pipe having a venturi formed therein and adapted for connection in said pipe line by welding comprising: a first section of said length of pipe having an upstream end and a downstream end and having inside and outside diameters substantially equal to those of the pipe of said pipe line and a convergent inlet section and a throat section of said venturi formed intEgrally with said first pipe section, said throat section having an inside diameter less than the inside diameter of said first pipe section; a pressure tap formed in the inner surface of said throat section and connected by a passage through said integral throat section and first pipe section to an exterior surface of said first pipe section; a second section of said length of pipe having an upstream end and a downstream end, said upstream end being welded to said downstream end of said first section, and a divergent diffuser section of said venturi having an inlet end welded to said throat section and an outlet end spaced from an inner surface of said second pipe section at a given ambient temperature, said diffuser section being formed of a metal having a high thermal coefficient of expansion than the metal of which said section is formed whereby at an operating temperature greater than said ambient temperature said outlet end of said diffuser section contacts said inner surface of said second section.
Claim 7
Dependent Claim
30 words
The venturi of claim 4 wherein said diffuser section has a length of about four times its minimum inside diameter and an angle of divergence of from 7* to 15*.
Claim 8
Dependent Claim
26 words
The venturi arrangement of claim 4 wherein said diffuser section is formed of stainless steel and wherein said section of pipe is formed of carbon steel.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |