WO2018052294A1 - Flowmeter - Google Patents

Flowmeter Download PDF

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Publication number
WO2018052294A1
WO2018052294A1 PCT/NL2017/050607 NL2017050607W WO2018052294A1 WO 2018052294 A1 WO2018052294 A1 WO 2018052294A1 NL 2017050607 W NL2017050607 W NL 2017050607W WO 2018052294 A1 WO2018052294 A1 WO 2018052294A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
measuring
flow meter
measuring chamber
section
Prior art date
Application number
PCT/NL2017/050607
Other languages
French (fr)
Inventor
Marcel Leonardus Josephus Petrus PETERS
Original Assignee
Peters Marcel Leonardus Josephus Petrus
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NL2017477A external-priority patent/NL2017477B1/en
Application filed by Peters Marcel Leonardus Josephus Petrus filed Critical Peters Marcel Leonardus Josephus Petrus
Priority to EP17817912.3A priority Critical patent/EP3513151A1/en
Publication of WO2018052294A1 publication Critical patent/WO2018052294A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/056—Orbital ball flowmeters

Definitions

  • the invention relates to a flow meter comprising:
  • a housing comprised of an inlet section and an outlet section, as well as a widened section located in between and comprised of a guide portion connecting to the inlet section and a measuring portion connecting to the guide portion and the outlet section; helical guide blades located in the guide portion and connected to the housing;
  • a measuring chamber located within the measuring portion, which chamber is bounded on an outside by the measuring portion of the housing, is bounded on an inlet side by the guide blades, is bounded on a running side located opposite to the inlet side by an outlet-section-end-face oriented to the measuring chamber, and is partly bounded on an inside by the core, and
  • the flow meter is installed between two pipe elements and liquid or gas flows via the inlet into the section containing the helical blades, where the liquid is caused to rotate and from there into the measuring chamber where a measuring ball is caused to rotate and then discharged through the outlet.
  • the rotational speed of the measuring ball is a measure for the flow rate of the fluid.
  • the rotational speed of the measuring ball is measured for example by means of a light beam which is caused to pass through the housing and detected at an opposite spot. The number of detected interruptions of the light beam (by the ball) indicates a measure for the flow rate.
  • a flow meter of this type is known from WO 2015/06187 A.
  • a relatively wide core is to be present for a gradual inflow of the fluid in the guide blades, for maintaining a sufficiently high flow rate for carrying the ball and for the rotation path of the ball.
  • the core of this known flow meter is hollow and open on the outlet side.
  • the flow meter according to the invention is characterized in that the core is a solid core. It has turned out that the fluid flow through the flow meter, in the case where the core is solid, is more constant than in the case where the core is open on the outlet side. As a result of this more constant flow also the measuring ball is carried by the fluid flow in a more constant way, leading to a more accurate and better reproducible measuring result.
  • the core is hollow and the core-end face oriented to the outlet opening is open.
  • the shape of the core end oriented to the outlet section affects the flow of the fluid.
  • a solid core where said end face is closed there will be less turbulence as a result of which the flow in the rotation path of the measuring ball will not be affected and, consequently, the movement of the measuring ball in the rotation path will be more constant leading to higher measuring accuracy and enhanced reproducibility than with the flow meter known from WO 2015/065187 A.
  • bacteria and/or other particles which are found in the fluid may attach in the open part of the core as a result of the vortex of the fluid.
  • JP S59-153124 A is known a flow meter for measuring the flow rate of a fluid.
  • This known flow meter also comprises a core, but the shape of the end of this core, past the measuring ball, does not have the effect that it enhances the accuracy of the measurement by means of the measuring ball, since in the known flow meter the measuring ball is not located on the outlet side of the flow meter.
  • An effect of the known flow meter core on the fluid flow and/or measuring accuracy has not been described.
  • the housing at the guide portion and the measuring portion is not widened.
  • the rotation path of the measuring ball is located at a distance from the lower side of the solid core as a result of which the shape of the core on the outlet side does not affect the movement of the measuring ball.
  • the arrangement of this known flow meter deviates from the construction of the flow meter according to the invention in that it has a deviating housing and a deviating position of the measuring ball.
  • a flow meter having a core hat has a conical shape both on the inlet side and the outlet side.
  • the measuring chamber is not bounded by the outside wall of the housing, as is found in the flow meter according to the invention, but a circular flow channel is located between the measuring chamber and the housing.
  • a circular flow channel is located between the measuring chamber and the housing.
  • a flow meter that also has a core.
  • use is not made of a wide core as is found in the flow meter according to the invention which carries the fluid outwards through a large diameter so as to cause the fluid to achieve maximum radial rotation.
  • the core in the known flow meter has a diameter that is much smaller than that of the core of the flow meter according to the invention.
  • the space between the core and the outlet section in the flow meter according to the invention is preferably fully open. In the case of a fully open passage between the core and the housing at the outlet opening, the fluid flow is hardly disturbed.
  • An advantageous embodiment of the flow meter according to the invention is characterized in that the core end is planar.
  • the side wall of the core runs parallel or substantially parallel to the longitudinal direction of the flow meter.
  • a further embodiment of the flow meter according to the invention, in which the end of the core is planar is characterized in that the side wall of the core towards the outlet section does not run parallel to the longitudinal direction of the flow meter, but tapers in the direction of the outlet section.
  • a still further embodiment of the flow meter according to the invention is characterized in that the guide blades are each provided with an inlet end bounding on the inlet section and an outlet end bounding on the measuring chamber, which outlet end is provided with a recess that has an arcuate bounding wall, where the maximum distance between an outlet-section-end-face oriented to the measuring chamber and this arcuate bounding wall is larger than the diameter of the measuring ball and the minimum distance between the outlet section end face oriented to the measuring chamber and this arcuate bounding wall is smaller than the diameter of the measuring ball.
  • the fluid flowing from the guide blades directly ends up in the rotation path of the measuring ball, so that high measuring accuracy and proper reproducibility are achieved. Since the distance from the measuring ball to the blades is smaller as a result of this arcuate or circular recess in the blades, measuring accuracy and reproducibility are enhanced even further.
  • FIG. 1 shows a sectional view of an embodiment of the flow meter according to the invention.
  • Fig. 1 shows an embodiment of the flow meter according to the invention in a sectional view.
  • the flow meter 1 comprises a housing 3 provided with an inlet section 3A and an outlet section 3D, as well as a widened section located in between.
  • This widened section comprises a guide portion 3B connecting to the inlet section, and a measuring portion 3C connecting to the guide portion and the outlet section.
  • the guide portion accommodates a plurality of helical guide blades 5 whose outer egdes are attached to the housing. Within these guide blades is present a core 7 which is attached to the inner edges of the lower parts of the guide blades.
  • Located in the measuring chamber is a measuring ball 13 which is rotating over the end face 11 in the measuring chamber during operation.
  • fluid flows through the inlet bounded by the inlet section 3 A into the blade portion bounded by the guide portion 3B, in which blade portion the fluid is put in rotation by the helical blades 5.
  • the fluid When leaving the blade portion the fluid directly flows into the measuring chamber 9 bounded by the measuring portion 3C, in which measuring chamber the measuring ball 13 is caused to rotate. Subsequently, the fluid flows outwards through the outlet bounded by the outlet section 3D.
  • the rotational speed of the measuring ball is a measure for the flow rate of the fluid.
  • Fig. 1 the flow of the fluid is indicated by means of arrows 21.
  • the space between the core 7 and the outlet section 3D is completely open.
  • the fluid can unimpededly flow from the measuring chamber to the outlet due to which the flow resistance of the flow meter is low.
  • the distance 15 between the outer edge 7B of the core end 7 A bounding on the measuring chamber and the inner edge 1 IB of the end face 11 of the outlet section 3D oriented to the measuring chamber is smaller than the diameter D of the measuring ball 13.
  • the core 7 is solid and the end 7A of the core is planar.
  • the guide blades 5 are provided with an inlet end bounding on the inlet and an outlet end bounding on the measuring chamber. This outlet end is provided with a recess that has an arcuate bounding wall 5C.
  • the maximum distance 17 between the outlet-section-end- face 11 oriented to the measuring chamber and this arcuate bounding wall 5C is larger than the diameter D of the measuring ball 13 and the minimum distance 19 between the outlet- section-end-face 11 oriented to the measuring chamber and this arcuate bounding wall 5C is smaller than the diameter D of the measuring ball 13. In consequence, the fluid coming from the guide blades directly flows into the rotation path of the measuring ball.
  • the inlet section 3 A and the outlet section 3D both have an equally wide cylindrical opening and are in line.
  • the widened section (formed by the portions 3B and 3C) has a larger outside diameter than that of the inlet and outlet sections, where the transition from the inlet section to the widened section is not an abrupt transition in one step, but a gradual one by means of a conical wall portion.
  • the core 7 has a conical wall 7C oriented to the inlet, which wall gradually guides the axially directed incoming fluid flow 21 to the guide blades 5.
  • the side wall 7D of the core in the embodiment under discussion has a tapered shape in the direction of the outlet.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

A flow meter (1) comprises a housing (3) provided with an inlet section (3A) and an outlet section (3D), as well as a widened section located in between. This widened section is comprised of a guide portion (3B) connecting to the inlet section and a measuring portion (3C) connecting to the outlet section. A plurality of helical guide blades (5) are accommodated in the guide portion and have a core (7) inside. The measuring portion (3C) includes a measuring chamber (9) in which a measuring ball (13) can rotate in a circle. Between the core (7) and the end face (11) of the outlet section (3D) oriented to the measuring chamber there are no wall portions present. As a result of this, fluid can flow unimpededly out of the measuring chamber. For realizing a fluid flow that is as constant and fluent as possible, the core (7) is a solid core having a planar end (7A).

Description

Flowmeter
DESCRIPTION:
Field of the invention
The invention relates to a flow meter comprising:
a housing comprised of an inlet section and an outlet section, as well as a widened section located in between and comprised of a guide portion connecting to the inlet section and a measuring portion connecting to the guide portion and the outlet section; helical guide blades located in the guide portion and connected to the housing;
a core present within the guide blades;
a measuring chamber located within the measuring portion, which chamber is bounded on an outside by the measuring portion of the housing, is bounded on an inlet side by the guide blades, is bounded on a running side located opposite to the inlet side by an outlet-section-end-face oriented to the measuring chamber, and is partly bounded on an inside by the core, and
a measuring ball present in the measuring chamber, which during operation rotates over the end face in the measuring chamber,
where an opening is present between a core end bounding on the measuring chamber and the outlet-section-end-face oriented to the measuring chamber and no wall portions are present,
where the distance between the outer edge of the core end bounding on the measuring chamber and the inner edge of the outlet-section-end-face oriented to the measuring chamber is smaller than the diameter of the measuring ball and
where the inlet section, the guide portion and the measuring portion of the housing, as well as the guide blades and the core (jointly) form a single injection moulded element.
During operation the flow meter is installed between two pipe elements and liquid or gas flows via the inlet into the section containing the helical blades, where the liquid is caused to rotate and from there into the measuring chamber where a measuring ball is caused to rotate and then discharged through the outlet. The rotational speed of the measuring ball is a measure for the flow rate of the fluid. The rotational speed of the measuring ball is measured for example by means of a light beam which is caused to pass through the housing and detected at an opposite spot. The number of detected interruptions of the light beam (by the ball) indicates a measure for the flow rate.
State of the art
A flow meter of this type is known from WO 2015/06187 A. In a flow meter comprising between the inlet section and outlet section a widened middle section containing a measuring chamber with a rotating measuring ball, a relatively wide core is to be present for a gradual inflow of the fluid in the guide blades, for maintaining a sufficiently high flow rate for carrying the ball and for the rotation path of the ball. For reasons of injection moulding the core of this known flow meter is hollow and open on the outlet side.
Summary of the invention
It is an object of the invention to provide a flow meter of the type defined in the opening paragraph that has higher measuring accuracy and better reproducibility of the measurements than those of the known flow meter. For this purpose, the flow meter according to the invention is characterized in that the core is a solid core. It has turned out that the fluid flow through the flow meter, in the case where the core is solid, is more constant than in the case where the core is open on the outlet side. As a result of this more constant flow also the measuring ball is carried by the fluid flow in a more constant way, leading to a more accurate and better reproducible measuring result. In the known flow meter the core is hollow and the core-end face oriented to the outlet opening is open. It has turned out that the shape of the core end oriented to the outlet section affects the flow of the fluid. By having a solid core where said end face is closed, there will be less turbulence as a result of which the flow in the rotation path of the measuring ball will not be affected and, consequently, the movement of the measuring ball in the rotation path will be more constant leading to higher measuring accuracy and enhanced reproducibility than with the flow meter known from WO 2015/065187 A. Correspondingly, it is avoided that bacteria and/or other particles which are found in the fluid may attach in the open part of the core as a result of the vortex of the fluid.
It may be observed that from JP S59-153124 A is known a flow meter for measuring the flow rate of a fluid. This known flow meter also comprises a core, but the shape of the end of this core, past the measuring ball, does not have the effect that it enhances the accuracy of the measurement by means of the measuring ball, since in the known flow meter the measuring ball is not located on the outlet side of the flow meter. An effect of the known flow meter core on the fluid flow and/or measuring accuracy has not been described. In addition, in this known flow meter the housing at the guide portion and the measuring portion is not widened. In the known flow meter, contrary to the flow meter according to the invention, the rotation path of the measuring ball is located at a distance from the lower side of the solid core as a result of which the shape of the core on the outlet side does not affect the movement of the measuring ball. The arrangement of this known flow meter deviates from the construction of the flow meter according to the invention in that it has a deviating housing and a deviating position of the measuring ball.
Furthermore, from DE 2910387A is known a flow meter having a core hat has a conical shape both on the inlet side and the outlet side. In this known flow meter the measuring chamber is not bounded by the outside wall of the housing, as is found in the flow meter according to the invention, but a circular flow channel is located between the measuring chamber and the housing. Through this channel in the known flow meter the fluid flows in a large diameter into the measuring chamber and leaves the measuring chamber in a smaller diameter through an outlet opening which is narrowed by a conical core part and a part lying opposite to it, which is contrary to the flow meter according to the invention where the fluid leaves the measuring chamber through a large outlet opening in a large diameter. In addition, also in this known flow meter the measuring ball is not located on the outlet side of the flow meter near the end of the core. An effect of the core in the known flow meter on the fluid flow and/or the measuring accuracy has not been described. The arrangement of this known flow meter and the function of its core deviate from those of the flow meter according to the invention.
From EP 0 172 451 A is known a flow meter that also has a core. In this known flow meter use is not made of a wide core as is found in the flow meter according to the invention which carries the fluid outwards through a large diameter so as to cause the fluid to achieve maximum radial rotation. The core in the known flow meter has a diameter that is much smaller than that of the core of the flow meter according to the invention. As a result, in this known flow meter the shape of the core barely has any effect on the flow of fluid, let alone the measuring accuracy. The space between the core and the outlet section in the flow meter according to the invention is preferably fully open. In the case of a fully open passage between the core and the housing at the outlet opening, the fluid flow is hardly disturbed.
An advantageous embodiment of the flow meter according to the invention is characterized in that the core end is planar.
In an embodiment of the flow meter according to the invention, in which the end of the core is planar, the side wall of the core runs parallel or substantially parallel to the longitudinal direction of the flow meter.
A further embodiment of the flow meter according to the invention, in which the end of the core is planar is characterized in that the side wall of the core towards the outlet section does not run parallel to the longitudinal direction of the flow meter, but tapers in the direction of the outlet section.
A still further embodiment of the flow meter according to the invention is characterized in that the guide blades are each provided with an inlet end bounding on the inlet section and an outlet end bounding on the measuring chamber, which outlet end is provided with a recess that has an arcuate bounding wall, where the maximum distance between an outlet-section-end-face oriented to the measuring chamber and this arcuate bounding wall is larger than the diameter of the measuring ball and the minimum distance between the outlet section end face oriented to the measuring chamber and this arcuate bounding wall is smaller than the diameter of the measuring ball. As a result, the fluid flowing from the guide blades directly ends up in the rotation path of the measuring ball, so that high measuring accuracy and proper reproducibility are achieved. Since the distance from the measuring ball to the blades is smaller as a result of this arcuate or circular recess in the blades, measuring accuracy and reproducibility are enhanced even further.
Brief description of the drawing figures
The invention will be further described below in more detail with reference to an example of embodiment of the flow meter according to the invention represented in the drawing figures. Fig. 1 shows a sectional view of an embodiment of the flow meter according to the invention.
Detailed description of the drawing figures Fig. 1 shows an embodiment of the flow meter according to the invention in a sectional view. The flow meter 1 comprises a housing 3 provided with an inlet section 3A and an outlet section 3D, as well as a widened section located in between. This widened section comprises a guide portion 3B connecting to the inlet section, and a measuring portion 3C connecting to the guide portion and the outlet section. The guide portion accommodates a plurality of helical guide blades 5 whose outer egdes are attached to the housing. Within these guide blades is present a core 7 which is attached to the inner edges of the lower parts of the guide blades.
Within the measuring portion is accommodated a measuring chamber 9 of which an outside is bounded by the measuring portion 3C of the housing and is bounded on an inlet side by the under sides 5C of the guide blades. On a running side situated opposite to the inlet side the measuring chamber is bounded by a measuring-chamber-oriented end face 11 of the outlet section. Between the core 7 and the measuring-chamber-oriented end face 11 of the outlet section there is an opening which forms the outlet opening for the fluid from the measuring chamber. Located in the measuring chamber is a measuring ball 13 which is rotating over the end face 11 in the measuring chamber during operation.
During operation fluid flows through the inlet bounded by the inlet section 3 A into the blade portion bounded by the guide portion 3B, in which blade portion the fluid is put in rotation by the helical blades 5. When leaving the blade portion the fluid directly flows into the measuring chamber 9 bounded by the measuring portion 3C, in which measuring chamber the measuring ball 13 is caused to rotate. Subsequently, the fluid flows outwards through the outlet bounded by the outlet section 3D. The rotational speed of the measuring ball is a measure for the flow rate of the fluid. In Fig. 1 the flow of the fluid is indicated by means of arrows 21.
Between an end 7A of the core 7, which end bounds on the measuring chamber, and the end face 11 of the outlet section 3D oriented to the measuring chamber, there are no wall portions present. The space between the core 7 and the outlet section 3D is completely open. As a result, the fluid can unimpededly flow from the measuring chamber to the outlet due to which the flow resistance of the flow meter is low. For preventing the measuring ball 13 from leaving the measuring chamber 9, the distance 15 between the outer edge 7B of the core end 7 A bounding on the measuring chamber and the inner edge 1 IB of the end face 11 of the outlet section 3D oriented to the measuring chamber is smaller than the diameter D of the measuring ball 13. For realizing a fluid flow that is as constant and fluent as possible, the core 7 is solid and the end 7A of the core is planar. The guide blades 5 are provided with an inlet end bounding on the inlet and an outlet end bounding on the measuring chamber. This outlet end is provided with a recess that has an arcuate bounding wall 5C. The maximum distance 17 between the outlet-section-end- face 11 oriented to the measuring chamber and this arcuate bounding wall 5C is larger than the diameter D of the measuring ball 13 and the minimum distance 19 between the outlet- section-end-face 11 oriented to the measuring chamber and this arcuate bounding wall 5C is smaller than the diameter D of the measuring ball 13. In consequence, the fluid coming from the guide blades directly flows into the rotation path of the measuring ball.
The inlet section 3 A and the outlet section 3D both have an equally wide cylindrical opening and are in line. The widened section (formed by the portions 3B and 3C) has a larger outside diameter than that of the inlet and outlet sections, where the transition from the inlet section to the widened section is not an abrupt transition in one step, but a gradual one by means of a conical wall portion. The core 7 has a conical wall 7C oriented to the inlet, which wall gradually guides the axially directed incoming fluid flow 21 to the guide blades 5. The side wall 7D of the core in the embodiment under discussion has a tapered shape in the direction of the outlet.
Albeit the invention has been explained in the foregoing with reference to the drawing figures, it should be set out that the invention is not by any manner or means restricted to the embodiment shown in the drawing figures. The invention also extends to any embodiments deviating from the embodiment shown in the drawing figures within the scope defined by the claims. For example the shape of the side wall of the core may also run parallel to the longitudinal direction of the flow meter in lieu of the taper shown in the drawing.

Claims

CLAIMS:
1. Flow meter (1) comprising:
a housing (3) comprised of an inlet section (3 A) and an outlet section (3D), as well as a widened section located in between and comprised of a guide portion (3B) connecting to the inlet section and a measuring portion (3C) connecting to the guide portion and the outlet section;
helical guide blades (5) located in the guide portion and connected to the housing; a core (7) present within the guide blades;
a measuring chamber (9) located within the measuring portion, which chamber is bounded on an outside by the measuring portion (3C) of the housing, is bounded on an inlet side by the guide blades (5), is bounded on a running side located opposite to the inlet side by an end face (1 1) of the outlet section (3D) oriented to the measuring chamber, and is partly bounded on an inside by the core (7), and
a measuring ball (13) present in the measuring chamber (9), which during operation rotates over the end face (1 1) in the measuring chamber,
where an opening is present between an end (7A) of the core (7) bounding on the measuring chamber (9) and the end face (11) of the outlet section (3D) oriented to the measuring chamber and no wall portions are present,
where the distance (15) between the outer edge (7B) of the core end (7 A) bounding on the measuring chamber and the inner edge (11B) end face (11) of the outlet section
(3D) oriented to the measuring chamber is smaller than the diameter (D) of the measuring ball (13), and
where the inlet section (3 A), the guide portion (3B) and the measuring portion (3C) of the housing, as well as the guide blades (5) and the core (7) jointly form a single injection moulded element
characterized in that the core (7) is a solid core.
2. Flow meter (1) as claimed in claim 1, characterized in that the end (7 A) of the core (7) is planar.
3. Flow meter (1) as claimed in claim 1 or 2, characterized in that the side wall (7D) of the core runs parallel or substantially parallel to the longitudinal direction of the flow meter.
4. Flow meter (1) as claimed in claim 1 or 2, characterized in that the side wall (7) of the core tapers in the direction of the outlet section (3D).
5. Flow meter (1) as claimed in claim 1, 2, 3 or 4, characterized in that the space between the core (7) and the outlet section (3D) is completely open.
6. Flow meter (1) as claimed in claim 1, 2, 3, 4 or 5, characterized in that the guide blades (5) are each provided with an inlet end bounding on the inlet section (3 A) and an outlet end bounding on the measuring chamber (9), which outlet end is provided with a recess that has an arcuate bounding wall (5C), where the maximum distance (17) between an end face (11) of the outlet section (3D) oriented to the measuring chamber and this arcuate bounding wall (5C) is larger than the diameter of the measuring ball (11) and the minimum distance (19) between the end face (11) of the outlet section (3D) oriented to the measuring chamber and this arcuate bounding wall (5C) is smaller than the diameter of the measuring ball (13).
PCT/NL2017/050607 2016-09-16 2017-09-15 Flowmeter WO2018052294A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17817912.3A EP3513151A1 (en) 2016-09-16 2017-09-15 Flowmeter

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NL2017477A NL2017477B1 (en) 2016-09-16 2016-09-16 Detectie-eenheid voor het detecteren van een ronddraaiende meetkogel, alsmede stromingsmeter voorzien van de detectie-eenheid
NL2017477 2016-09-16
NL2018087A NL2018087B1 (en) 2016-09-16 2016-12-27 Flow meter
NL2018087 2016-12-27
NL2018587 2017-03-28
NL2018587 2017-03-28

Publications (1)

Publication Number Publication Date
WO2018052294A1 true WO2018052294A1 (en) 2018-03-22

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ID=60138102

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2017/050607 WO2018052294A1 (en) 2016-09-16 2017-09-15 Flowmeter

Country Status (3)

Country Link
EP (1) EP3513151A1 (en)
NL (1) NL2019555B1 (en)
WO (1) WO2018052294A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1556139A (en) * 1976-10-20 1979-11-21 Epitestudomanyi Intezet Flow meter
DE2910387A1 (en) 1979-03-16 1980-09-18 Licentia Gmbh Volumetric flowmeter with ball in toroidal chamber - formed by diaphragm and sealing disc in cylindrical housing
JPS59153124A (en) 1983-02-22 1984-09-01 Matsushita Electric Ind Co Ltd Flow rate detecting device
EP0172451A2 (en) 1984-07-31 1986-02-26 Matsushita Electric Industrial Co., Ltd. Flow rate detecting device
JPS61259120A (en) * 1985-05-14 1986-11-17 Matsushita Electric Ind Co Ltd Flow rate detector
JPH0310119A (en) * 1989-06-08 1991-01-17 Matsushita Electric Ind Co Ltd Flow-rate detecting apparatus
WO2015065187A1 (en) 2013-10-29 2015-05-07 Peters Marcel Leonardus Josephus Petrus Flow meter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1556139A (en) * 1976-10-20 1979-11-21 Epitestudomanyi Intezet Flow meter
DE2910387A1 (en) 1979-03-16 1980-09-18 Licentia Gmbh Volumetric flowmeter with ball in toroidal chamber - formed by diaphragm and sealing disc in cylindrical housing
JPS59153124A (en) 1983-02-22 1984-09-01 Matsushita Electric Ind Co Ltd Flow rate detecting device
EP0172451A2 (en) 1984-07-31 1986-02-26 Matsushita Electric Industrial Co., Ltd. Flow rate detecting device
JPS61259120A (en) * 1985-05-14 1986-11-17 Matsushita Electric Ind Co Ltd Flow rate detector
JPH0310119A (en) * 1989-06-08 1991-01-17 Matsushita Electric Ind Co Ltd Flow-rate detecting apparatus
WO2015065187A1 (en) 2013-10-29 2015-05-07 Peters Marcel Leonardus Josephus Petrus Flow meter

Also Published As

Publication number Publication date
EP3513151A1 (en) 2019-07-24
NL2019555A (en) 2017-10-12
NL2019555B1 (en) 2019-10-07

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