US3776658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitot tube for pitot pump
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1972-08-14
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Granted: 1973-12-04
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Expires: 1992-08-14
Abstract
Abstract A pitot tube for a pitot pump, i.e., a centrifugal pump comprising a rotary casing, means for delivering a fluid to be pumped to the rotary casing, and a discharge duct coaxial with the rotary casing. The pitot tube is disposed in and extends radially of the rotary casing and is provided adajcent its outer end with an inlet facing in a direction opposite to the direction of rotation of the rotary casing, whereby the inlet receives fluid from adjacent the periphery of the rotary casing with a ram effect. The pitot tube includes axially spaced side walls and is provided adjacent its inner end, and in one of such side walls, with an outlet communicating with the discharge duct and coaxial with the rotary casing. Within the pitot tube is a flow splitting vane which extends from one side wall to the other, such vane extending from adjacent the outlet to adjacent the outer end of the pitot tube and dividing the pitot tube into two compartments spaced apart circumferentially of the rotary casing, one compartment being adjacent the leading edge of the pitot tube and the other adjacent the trailing edge thereof. This vane has the effect of streamlining the fluid flow through the outlet of the pitot tube and into and through the discharge duct, thereby minimizing flow losses.
Inventors
- 👤 J Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:52
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
243 words
In a pitot pump, the combination of: a. a rotary casing; b. means for delivering a fluid to be pumped to said rotary casing; c. a discharge duct coaxial with said rotary casing; d. a pitot tube in and extending radially of said rotary casing, said pitot tube having adjacent its outer end an inlet facing in a direction opposite to the direction of rotation of said rotary casing, said pitot tube having axially spaced side walls providing therebetween a radial passage and having circumferentially spaced edges joined to provide said pitot tube with circumferentially spaced leading and trailing edges, said pitot tube having adjacent its inner end, and in one of said side walls, an outlet coaxial with said rotary casing and connecting the inner end of said radial passage to said discharge duct, and said pitot tube further having a circumferentially rearwardly extending passage connecting said inlet to the outer end of said radial passage; and e. a flow splitting vane in said radial passage in said pitot tube and extending from one side wall of said pitot tube to the other, said vane extending generally radially from adjacent said outlet to adjacent said outer end of said radial passage in said pitot tube and dividing said radial passage in said pitot tube into two compartments spaced apart circumferentially of said rotary casing, and the outer end of said vane being spaced circumferentially from said inlet by said rearwardly extending passage.
Claim 2
Dependent Claim
243 words
In a pitot pump, the combination of: a. a rotary casing; b. means for delivering a fluid to be pumped to said rotary casing; c. a discharge duct coaxial with said rotary casing; d. a pitot tube in and extending radially of said rotary casing, said pitot tube having adjacent its outer end an inlet facing in a direction opposite to the direction of rotation of said rotary casing, said pitot tube having axially spaced side walls providing therebetween a radial passage and having circumferentially spaced edges joined to provide said pitot tube with circumferentially spaced leading and trailing edges, said pitot tube having adjacent its inner end, and in one of said side walls, an outlet coaxial with said rotary casing and connecting the inner end of said radial passage to said discharge duct, and said pitot tube further having a circumferentially rearwardly extending passage connecting said inlet to the outer end of said radial passage; and e. a flow splitting vane in said radial passage in said pitot tube and extending from one side wall of said pitot tube to the other, said vane extending generally radially from adjacent said outlet to adjacent said outer end of said radial passage in said pitot tube and dividing said radial passage in said pitot tube into two compartments spaced apart circumferentially of said rotary casing, and the outer end of said vane being spaced circumferentially from said inlet by said rearwardly extending passage.
Claim 3
Dependent Claim
191 words
A pitot tube for a pitot pump, said pitot tube having radially spaced inner and outer ends and having circumferentially spaced leading and trailing edges connected by laterally spaced side walls providing therebetween a radial passage, said pitot tube having adjacent its outer end an inlet facing in the same direction as said leading edge and connected to the outer end of said radial passage by a circumferentially rearwardly extending passage, said pitot tube having an outlet adjacent its inner end and in one of said side walls and communicating with the inner end of said radial passage, said pitot tube having therein a flow splitting vane which is disposed in said radial passage and which extends laterally from one side wall of said pitot tube to the other, said vane extending generally radially outwardly from adjacent said outlet to adjacent said outer end of said radial passage in said pitot tube and dividing said radial passage in said pitot tube into leading and trailing compartments respectively adjacent said leading and trailing edges, and the outer end of said vane being spaced circumferentially from said inlet by said rearwardly extending passage.
Claim 4
Dependent Claim
191 words
A pitot tube for a pitot pump, said pitot tube having radially spaced inner and outer ends and having circumferentially spaced leading and trailing edges connected by laterally spaced side walls providing therebetween a radial passage, said pitot tube having adjacent its outer end an inlet facing in the same direction as said leading edge and connected to the outer end of said radial passage by a circumferentially rearwardly extending passage, said pitot tube having an outlet adjacent its inner end and in one of said side walls and communicating with the inner end of said radial passage, said pitot tube having therein a flow splitting vane which is disposed in said radial passage and which extends laterally from one side wall of said pitot tube to the other, said vane extending generally radially outwardly from adjacent said outlet to adjacent said outer end of said radial passage in said pitot tube and dividing said radial passage in said pitot tube into leading and trailing compartments respectively adjacent said leading and trailing edges, and the outer end of said vane being spaced circumferentially from said inlet by said rearwardly extending passage.
Claim 5
Dependent Claim
16 words
A pitot tube according to claim 2 wherein said vane diametrally traverses and bisects said outlet.
Claim 6
Dependent Claim
16 words
A pitot tube as defined in claim 3 wherein said vane extends laterally into said outlet.
Claim 7
Dependent Claim
30 words
A pitot tube as set forth in claim 3 wherein said vane and said trailing edge converge from adjacent the inner end of said vane toward the outer end thereof.
Claim 8
Dependent Claim
28 words
A pitot tube as defined in claim 5 wherein the minimum cross sectional area of said trailing compartment is about half the cross sectional area of said inlet.
Claim 9
Dependent Claim
36 words
A pitot tube according to claim 3 wherein the ratio of the spacing of the outer surfaces of said side walls to the spacing of said leading and trailing edges is not more than about 0.18.
Claim 10
Dependent Claim
27 words
A pitot tube as defined in claim 3 wherein the cross sectional area of said radial passage increases toward the inner end thereof to provide a diffuser.
References Cited (Backward Citations)
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US3051089A
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US3384024A
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |