Patent US2292072A successfully refreshed from Google Patents.
Patent US3733898A successfully refreshed from Google Patents.
US3733898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow conditioning apparatus
Assignee: Oval Engineering Co Ltd
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Filing: 1971-04-19
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Granted: 1973-05-22
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Expires: 1991-04-19
Abstract
Abstract A flow conditioning apparatus is connected to the inlet of a flow meter in a conduit system for conditioning the flow of a fluid supplied to the flow meter for the purpose of measurement of the flow rate. The apparatus comprises a device for uniformalizing the velocity distribution of fluid flow, and this device is combined with a vortex regulator and a flow straighter for more effectively conditioning the fluid flow.
Inventors
- 👤 H Yamamoto
- 👤 K Okuda
- 👤 H Nomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:35
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
233 words
A flow conditioning apparatus for incorporation in a fluid conduit system including a fluid flow responsive means therein, said apparatus comprising means adapted to be disposed upstream of said fluid flow responsive means for uniformalizing the velocity distribution of the flow of fluid in a plane perpendicular to the axis of the conduit thereby to supply a uniformalized flow of fluid to said fluid flow responsive means, said fluid flow velocity distribution uniformalizing means including a generally cylindrical body having an inlet end, an outlet end, and an intervening inner diameter larger than the diameter of the inlet of said fluid flow responsive means, a first sharp-edged annular lip extending radially inwardly from the inner wall of said cylindrical body in coaxial relation with said body and defining a first orifice whose diameter is no smaller than the diameter of the inlet of said fluid flow responsive means, said first orifice being spaced downstream from the inlet end of said cylindrical body to form a pocket between said inlet end and said first orifice, and a second annular lip positioned downstream of said first lip and sloping toward said first annular lip, said second lip extending inwardly from the inner wall of said body adjacent to the outlet end of said body to define a second orifice downstream of the first orifice and upstream of the inlet of said fluid flow responsive means.
Claim 2
Dependent Claim
233 words
A flow conditioning apparatus for incorporation in a fluid conduit system including a fluid flow responsive means therein, said apparatus comprising means adapted to be disposed upstream of said fluid flow responsive means for uniformalizing the velocity distribution of the flow of fluid in a plane perpendicular to the axis of the conduit thereby to supply a uniformalized flow of fluid to said fluid flow responsive means, said fluid flow velocity distribution uniformalizing means including a generally cylindrical body having an inlet end, an outlet end, and an intervening inner diameter larger than the diameter of the inlet of said fluid flow responsive means, a first sharp-edged annular lip extending radially inwardly from the inner wall of said cylindrical body in coaxial relation with said body and defining a first orifice whose diameter is no smaller than the diameter of the inlet of said fluid flow responsive means, said first orifice being spaced downstream from the inlet end of said cylindrical body to form a pocket between said inlet end and said first orifice, and a second annular lip positioned downstream of said first lip and sloping toward said first annular lip, said second lip extending inwardly from the inner wall of said body adjacent to the outlet end of said body to define a second orifice downstream of the first orifice and upstream of the inlet of said fluid flow responsive means.
Claim 3
Dependent Claim
31 words
A flow conditioning apparatus as claimed in claim 1, in which a flow straighter is provided upstream of said fluid flow velocity distribution uniformalizing means and is connected with said means.
Claim 4
Dependent Claim
38 words
A flow conditioning apparatus as claimed in claim 1, in which a vortex regulator including a perforate member of network structure is disposed upstream of said fluid flow velocity distribution uniformalizing means and is connected with said means.
Claim 5
Dependent Claim
79 words
A flow conditioning apparatus as claimed in claim 1, in which a cylindrical extension extends integrally from said cylindrical body of said fluid flow integrally from said cylindrical body of said fluid flow velocity distribution uniformalizing means in an upstream direction and in coaxial relation with said body, and a vortex regulator including a perforate member of network structure and a flow straighter disposed within said extension on the upstream side of said fluid flow velocity distribution uniformalizing means.
Claim 6
Dependent Claim
29 words
A flow conditioning apparatus as claimed in claim 1, in which said second annular lip is shaped to define an annular recess adjacent the outlet end of said body.
Claim 7
Dependent Claim
127 words
A flow conditioning apparatus as claimed in claim 4, in which said perforate member of network structure is spaced a predetermined distance from the inlet port of said extension, the portion of said extension from said inlet port to said perforate member being tapered so as to be gradually enlarged in diameter in the downstream direction, the portion of said extension containing said flow straighter therein having a cylindrical shape of constant diameter connected to the inlet end of said body, said cylindrical body having an inner diameter larger than the diameter of said flow straighter, and said first annular lip being spaced from the inlet end of said body by a distance greater than the diameter of said first orifice to define a deep pocket thErebetween.
Claim 8
Dependent Claim
12 words
The apparatus of claim 1 wherein said second annular lip is sharp-edged.
Claim 9
Dependent Claim
27 words
The apparatus of claim 1 wherein the diameter of said second orifice is no smaller than the diameter of the inlet of said fluid flow responsive means.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |