US3774645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flange-free venturi nozzle insert
Assignee: Universal Oil Products Co
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Filing: 1971-12-06
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Granted: 1973-11-27
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Expires: 1991-12-06
Abstract
Abstract A flange-free venturi element for use in producing differential pressure for measurement of fluid flow in a conduit which is adapted for welded insertion into a conduit. The insert also has special passageway means around each end of the inlet-outlet cone portions of the venturi and through a supporting web to assist in balancing pressure differences during normal operation as well as during a possible ''''choke'''' or sonic flow condition such that the wall thickness of the pressure recovery cone can be of somewhat lesser thickness than would otherwise be required.
Inventors
- 👤 L Pompa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:14
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/44; F; F16; F16L; F16L55/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
A flange-free venturi nozzle insert element suitable for welded installation into a fluid conduit, which comprises in combination, a venturi portion having a tapering inlet cone section, a throat section and a tapering pressure recovery cone section, a circumscribing support ring section around said throat section, and a conduit adapter section positioned concentrically around said venturi portion and connecting to said ring section, whereby the latter together with said conduit adapter section will hold the venturi portion in a conduit connective with said conduit section, the exterior diameter of both said inlet and pressure recovery cone sections are made slightly smaller than the inside diameter of said conduit, whereby to provide small upstream and downstream fluid flow and pressure balancing annular passageways around said venturi inlet and recovery cone sections, and said ring section is provided with spaced passageway means to combine with the upstream passageway to choke fluid flow and control pressure drop around the element during normal flow conditions, said passageway means in said ring section having an area smaller than said downstream annular passageway to thereby be effective to lessen external pressure on the pressure recovery venturi section in the event of a sonic flow condition through said venturi element, and said passageway means comprising holes which are spaced circumferentially around the throat section of the venturi element.
Claim 2
Dependent Claim
221 words
A flange-free venturi nozzle insert element suitable for welded installation into a fluid conduit, which comprises in combination, a venturi portion having a tapering inlet cone section, a throat section and a tapering pressure recovery cone section, a circumscribing support ring section around said throat section, and a conduit adapter section positioned concentrically around said venturi portion and connecting to said ring section, whereby the latter together with said conduit adapter section will hold the venturi portion in a conduit connective with said conduit section, the exterior diameter of both said inlet and pressure recovery cone sections are made slightly smaller than the inside diameter of said conduit, whereby to provide small upstream and downstream fluid flow and pressure balancing annular passageways around said venturi inlet and recovery cone sections, and said ring section is provided with spaced passageway means to combine with the upstream passageway to choke fluid flow and control pressure drop around the element during normal flow conditions, said passageway means in said ring section having an area smaller than said downstream annular passageway to thereby be effective to lessen external pressure on the pressure recovery venturi section in the event of a sonic flow condition through said venturi element, and said passageway means comprising holes which are spaced circumferentially around the throat section of the venturi element.
Claim 3
Dependent Claim
43 words
The venturi element of claim 1 is further characterized in that the upstream passageway and said passageway means through said ring section are about equal in area, whereby both such passageways are each of less area than that of the downstream annular passageway.
Claim 4
Dependent Claim
59 words
The venturi insert element of claim 1 further characterized in that at least one pressure tap connection and passageway is provided through said conduit adapter section, said support ring section and the throat section whereby such element may be used to provide differential pressure readings in the measurement of flow through the fluid conduit and the venturi nozzle element.
Claim 5
Dependent Claim
42 words
The venturi element of claim 1 further characterized in that each end portion of said conduit adapter section has beveled end portions adapted for a full penetration abutting welds connection with a main fluid conduit into which the element will be inserted.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |