US3604263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring the flow intensity of circulating liquid
Assignee: US Philips Corp
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Filing: 1969-01-28
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Granted: 1971-09-14
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Expires: 1989-01-28
Abstract
Abstract A device for measuring liquid flow in a channel includes a first elongated tube open at one end and insertable through a channel wall. A flexible tube extends through the first tube and out the open end into the channel for supplying an auxiliary liquid thereto at a known flow rate via outlet openings provided near the front end of the tube. First, second and third thermosensitive elements for measuring the temperatures of the channel liquid, the auxiliary liquid and the mixed liquids, respectively, are disposed outside of the flexible tube, within the flexible tube, and near the front end of the flexible tube within the channel, respectively.
Inventors
- 👤 Michel Joseph Auphan
- 👤 Jean Perilhou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:47
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/704; A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0275; A61B5/028; G01F1/68; G01F1/684; G01F1/688; G01F1/6888; A61M; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3334; A61M25/00; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
A device for measuring the flow strength of a liquid passing through a channel, comprising two substantially paraxial tubes adapted to be introduced into the channel, one of which, the injection tube, has an opening at one end and serves as an insert tube for the second tube, which is flexible and is closed at the insertable end and is provided with one or more outlet openings in the wall near the closed end of the tube, means for supplying an auxiliary liquid to said flexible tube, a flow meter arranged to measure the flow strength of said auxiliary liquid, and a plurality of thermosensitive elements for measuring the temperature of the liquid passing through the channel, the auxiliary liquid and the two mixed liquids, said elements being disposed on the outside of the flexible tube, inside the passage thereof and near the closed end of the tube beyond said outlet openings, respectively.
Claim 2
Independent Claim
153 words
A device for measuring the flow strength of a liquid passing through a channel, comprising two substantially paraxial tubes adapted to be introduced into the channel, one of which, the injection tube, has an opening at one end and serves as an insert tube for the second tube, which is flexible and is closed at the insertable end and is provided with one or more outlet openings in the wall near the closed end of the tube, means for supplying an auxiliary liquid to said flexible tube, a flow meter arranged to measure the flow strength of said auxiliary liquid, and a plurality of thermosensitive elements for measuring the temperature of the liquid passing through the channel, the auxiliary liquid and the two mixed liquids, said elements being disposed on the outside of the flexible tube, inside the passage thereof and near the closed end of the tube beyond said outlet openings, respectively.
Claim 3
Dependent Claim
28 words
A device as claimed in claim 1 further comprising a plurality of current conductors connected to the thermosensitive elements and accommodated in the wall of the flexible tube.
Claim 4
Dependent Claim
67 words
A device as claimed in claim 1 characterized in that the thermosensitive element near the end of the tube is connected to a first thermosensitive element on the outside thereof and the thermosensitive element inside the passage is connected to a second thermosensitive element on the outside of the tube so that the measuring results obtained therefrom correspond directly to the temperature differences at the measuring points.
Claim 5
Dependent Claim
22 words
A device as claimed in claim 1 wherein the thermosensitive elements and the flexible tube are arranged to form a unitary structure.
Claim 6
Independent Claim
170 words
A device for measuring the flow of a liquid passing through a channel comprising, a first elongated tube open at one end and capable of being inserted through a wall of the channel, a flexible tube axially extending through said first tube and insertable out the open end into the channel downstream for supplying an auxiliary liquid to the channel at a known rate of flow, said flexible tube being closed at the insertable end and having one or more outlet openings for the auxiliary liquid in its wall near said closed end, a first thermosensitive element disposed in the channel at a point on the outside of the flexible tube for measuring the temperature of the channel liquid, a second thermosensitive element disposed within the flexible tube for measuring the temperature of the auxiliary liquid, and a third thermosensitive element disposed in the channel near the closed end of the flexible tube and downstream of said outlet openings for measuring the temperature of the mixed channel and Auxiliary liquids.
Claim 7
Independent Claim
170 words
A device for measuring the flow of a liquid passing through a channel comprising, a first elongated tube open at one end and capable of being inserted through a wall of the channel, a flexible tube axially extending through said first tube and insertable out the open end into the channel downstream for supplying an auxiliary liquid to the channel at a known rate of flow, said flexible tube being closed at the insertable end and having one or more outlet openings for the auxiliary liquid in its wall near said closed end, a first thermosensitive element disposed in the channel at a point on the outside of the flexible tube for measuring the temperature of the channel liquid, a second thermosensitive element disposed within the flexible tube for measuring the temperature of the auxiliary liquid, and a third thermosensitive element disposed in the channel near the closed end of the flexible tube and downstream of said outlet openings for measuring the temperature of the mixed channel and Auxiliary liquids.
Claim 8
Dependent Claim
65 words
A device as claimed in claim 5 further comprising a fourth thermosensitive element for measuring the temperature of the channel liquid, said first and fourth thermosensitive elements being mounted on the outside of the flexible tube at a point upstream from the outlet openings and in close proximity to one another, said third thermosensitive element being mounted on the closed end of the flexible tube.
Claim 9
Dependent Claim
107 words
A device as claimed in claim 6 further comprising, a first electrical conductor connecting said first and second thermosensitive elements in series and extending through said flexible tube to provide a pair of output terminals at which an electrical signal is produced that is proportional to the temperature difference between the channel liquid and the auxiliary liquid, and a second electrical conductor connecting said third and fourth thermosensitive elements in series and extending through said flexible tube to provide a second pair of output terminals at which an electric signal is produced that is proportional to the temperature difference between the channel liquid and the mixed liquids.
Claim 10
Dependent Claim
26 words
A device as claimed in claim 7 wherein at least a portion of one of said conductors is embedded within the wall of the flexible tube.
Claim 11
Independent Claim
188 words
A method of measuring the rate of flow of a liquid flowing in a channel comprising the following steps: introducing a hollow tube having an open end through a wall of the channel, inserting a flexible tube through the hollow tube and out through open end thereof into the channel, said flexible tube having outlet openings near the end inserted into the channel, introducing an auxiliary liquid into the channel at a known rate of flow via said flexible tube, determining the temperature difference between the channel liquid and the auxiliary liquid by means of thermosensitive elements disposed outside of the flexible tube within the channel and within the flexible tube, respectively, determining the temperature difference between the channel liquid and the mixed liquids by means of thermosensitive elements disposed outside of the flexible tube within the channel and within the channel near the front end of the flexible tube but downstream of the outlet openings therein, and determining the rate of flow of the channel liquid by finding the product of the rate of flow of the auxiliary liquid and the quotient of said two temperature differences.
Claim 12
Independent Claim
188 words
A method of measuring the rate of flow of a liquid flowing in a channel comprising the following steps: introducing a hollow tube having an open end through a wall of the channel, inserting a flexible tube through the hollow tube and out through open end thereof into the channel, said flexible tube having outlet openings near the end inserted into the channel, introducing an auxiliary liquid into the channel at a known rate of flow via said flexible tube, determining the temperature difference between the channel liquid and the auxiliary liquid by means of thermosensitive elements disposed outside of the flexible tube within the channel and within the flexible tube, respectively, determining the temperature difference between the channel liquid and the mixed liquids by means of thermosensitive elements disposed outside of the flexible tube within the channel and within the channel near the front end of the flexible tube but downstream of the outlet openings therein, and determining the rate of flow of the channel liquid by finding the product of the rate of flow of the auxiliary liquid and the quotient of said two temperature differences.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |