US3683693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal proportional differential pressure producing fluid flow device
Assignee: Individual
•
Filing: 1970-10-08
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Granted: 1972-08-15
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Expires: 1990-10-08
Abstract
Abstract In the conduit of a fluid and/or gas flow system at least one fin extends inwardly from the wall of the conduit to produce a selected predetermined Beta ratio and differential pressure. The configuration of the fin can be changed by numerous methods to produce the desired Beta ratio, differential pressure and overall performance characteristics.
Inventors
- 👤 William R Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A differential pressure producing fluid flow device having high and low pressure sensing taps, for insertion into a conduit of a fluid system, comprising: at least one non-annular fin connected to and extending inwardly from the wall of said conduit; said fin having a generally triangular profile when viewed in elevation transverse to the direction of fluid flow with one side extending from the inner wall of said conduit in an upstream direction to the innermost end thereof; and said low pressure sensing tap opens in said side; said fin having a nonstreamlined blunt shape with sharp edges extending inwardly from the interior surface of said conduit to face into the axial fluid flow to shear the fluid and create a centrifugal force and flow path in the localized area of, and communicating with, the low pressure sensing tap.
Claim 2
Dependent Claim
139 words
A differential pressure producing fluid flow device having high and low pressure sensing taps, for insertion into a conduit of a fluid system, comprising: at least one non-annular fin connected to and extending inwardly from the wall of said conduit; said fin having a generally triangular profile when viewed in elevation transverse to the direction of fluid flow with one side extending from the inner wall of said conduit in an upstream direction to the innermost end thereof; and said low pressure sensing tap opens in said side; said fin having a nonstreamlined blunt shape with sharp edges extending inwardly from the interior surface of said conduit to face into the axial fluid flow to shear the fluid and create a centrifugal force and flow path in the localized area of, and communicating with, the low pressure sensing tap.
Claim 3
Dependent Claim
16 words
The invention of claim 1 wherEin said side of said generally triangular profile is an hypotenuse.
Claim 4
Dependent Claim
37 words
The invention of claim 2 wherein said high pressure sensing tap opens in the inwardly extending upstream leg of said generally triangular profile of said fin; and said leg and said hypotenuse lie in substantially planar surfaces.
Claim 5
Dependent Claim
27 words
The invention of claim 1 wherein said high pressure sensing tap opens in the inwardly extending upstream of leg of said generally triangular profile of said fin.
Claim 6
Dependent Claim
28 words
The invention of claim 4 wherein said high pressure and low pressure sensing taps are positioned at the same distance radially inwardly from the wall of the conduit.
Claim 7
Dependent Claim
26 words
The invention of claim 1 wherein said generally triangular profile is substantially an oblique triangle wherein the included angle between the inwardly extending legs is obtuse.
Claim 8
Dependent Claim
28 words
The invention of claim 6 wherein said high pressure and low pressure sensing taps are positioned at the same distance radially inwardly from the wall of the conduit.
Claim 9
Dependent Claim
13 words
The invention of claim 1 wherein said side is a substantially planar surface.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |