US2600733A - Gas mixing apparatus - Google Patents
Gas mixing apparatus Download PDFInfo
- Publication number
- US2600733A US2600733A US19950950A US2600733A US 2600733 A US2600733 A US 2600733A US 19950950 A US19950950 A US 19950950A US 2600733 A US2600733 A US 2600733A
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- United States
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- gas
- section
- mixing
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87571—Multiple inlet with single outlet
- Y10T137/87652—With means to promote mixing or combining of plural fluids
- Y10T137/8766—With selectively operated flow control means
Definitions
- the invention comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and the annexed drawing setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principle of the invention may be employed.
- Fig. 1 is a fragmentary side elevational view showing an embodiment of the invention
- Fig. 2 is a fragmentary axial section of the lefthand portion of the mixing chamber
- Fig. 3 is a fragmentary axial section of an intermediate portion of the chamber
- Fig. 4 is a transverse section taken on plane indicated by line IV, Fig. 3;
- Fig. 5 is a fragmentary axial vertical section of the right-hand end of the apparatus.
- the initial contact of the gases to be mixed. is provided by head-on. jetting of gas stream against gas stream under pressure from pipes 2, 3, near the closed end 4 of a mixing chamber.
- the pipe 2 is connected with the source of high pressure gas, for example, a container or cylinder 5 with outlet head 6, and redueing valve 1, with high pressure gauge 8 and lower pressure gauge 9. From the reducing valve, pipe 2 connects through a pressure regulator or a constant difierential flow regulator l0 and gauge H and flow orifice l2 to the mixing chamber.
- the opposed gas pipe 3 leads from a source of gas under pressure, also through a pressure regulator l0, gauge II and flow-orifice [2.
- the mixing chamber as a whole, for convenience, is made up of assemblable sections a, b, c, d, e, y, and in whichever sections desired, as for example the sections l6 between each of the sections 1), c, d, e, two baiiie plates each are carried.
- These baffles [4, as shown in Figs. 3 and 4 are desirably of disc form, held in the section casing suitably, as shown by welding, each baflie plate. having evenly spaced holes, the diameter of which may depend somewhat on the gases being mixed.
- baflle plates and the number of sections 12,0, etc.
- the sections making up the mixer may bescrew-threadedly connected.
- the sections a and 3 may be pipeof suitable size for the particular situation involved, and sections 1), c, d, e, may be pipe couplings connecting intermediate sections It, The assembly is suitably supported. safeguarding the connecting lines 2, 3, and in one form may be conveniently held to the gas container 5 by holding clamp l1 and screw-threaded means [8. Beyond the series of bafll'es, the section 1 is closed at the end 20, and provides discharge means.
- this is in the form of a discharge pipe 2
- This pipe with suitable control valve may thus. lead off a mixed gas product as desired.
- An additional discharge pipe 23, suitably valve controlled, is also desirably provided axially positioned in the end plate 20.
- carbon dioxide gas at around 500 lbs. per sq. in. may be taken from the container 5 through the reducing valve 1, regulator l0 .and flow-orifice iii, the pressure being reduced as desired, for instance to 5 lbs. per sq. in., and constant pressure, as measured by the gauge II on the upstream side of the orifice I2, is supplied through the pipe 2.
- this flow-orifice may be & in. .By proper adjustment of the regulator III, the desired rate of carbon dioxide flow is provided.
- the desired proportioned flow of compressed air may be provided through the regulator l0 and the floworifice [2, for gauge pressure, for example usually about 3 or 4 lbs. per sq. in. at the gauge II.
- the two gas streams abut violently head-on in the mixing section a, and swirling through the spaced bafiies I4 are rapidly and completely mixed, and the mixed product is drawn off, as by pipeZl.
- a compressed gas container having a reducing valve, a pressure regulator, pressure gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipe enters radially near one end, means for holding said mixing chamber to said container, another pipe for a compressed gas with a pressure regulator, pressure gauge and flow-orifice and entering said mixing chamber diametrally spaced to the aforesaid pipe for the jetting of the gas streams head-on against each other, an expansion mixing space surrormding the ends of said entering pipes and extending to perforated baffles in sections screw-threadedly connected on serially, a discharge section, a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall, and another discharge pipe extending axially of said section.
- a compressed gas container having a reducing valve, a pressure regulator, gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipe enters radially near one end, another pipe for a compressed gas with a pressure regulator, pressure gauge and floworifice and entering said mixing chamber diametrally spaced to the aforesaid pipe for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes and extending to perforated bafiles in sections screw-threadedly connected on serially, a discharge section, a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall, and another discharge pipe extending axially of said section.
- pressure gas supplied pipes each with a pressure regulator, gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipes enter diametrally spaced for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, perforated bafiles through which the gas mixture then flows, a discharge section, and a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall.
- a multi-section mixing chamber pressure gas supply pipes entering said chamber diametrally spaced to each other for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, perforated bafiles through which the gas mixture then flows, said baflles being in sections screwthreadedly connected on serially, and a discharge section with a discharge pipe.
- a multi-section mixing chamber pressure gas supply pipes entering said chamber diametrally spaced to each other for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, and a series of perforated baffles through which the gas mixture then flows.
- a mixing chamber feed pipes for respective gases entering said chamber diametrally spaced for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, a series of spaced perforated bafiles through which the gas mixture then flows, and outlet means therebeyond.
Description
June 17, 1952 T. L CLIFT GAS MIXING APPARATUS Filed Dec. 6, 1950 aim-ICE Zilll:
'IIIIIIIIII[III/III/;/IIIIIIIIIII/II/Ilfl S. R T Y wF E m N w R L 6 o s T U T m A H m T Patented June 17, 1952 GAS MIXING APPARATUS Therlis L. Clift, Erlanger, Ky., assignor to The Standard Oil Company, Cleveland, Ohio, a corporation of Ohio Application December 6, 1950, Serial No. 199,509-
'7 Claims. 1
To mix gases uniformly presents inherent difficulties, and particularly where there 'is material difference in the specific gravities of the gases to be mixed, also particularly where the mixing operation is to be performed in a short time and without undue complication of apparatus. Notably, in mixing gases for purposes of calibration of instruments, as for instance providing mixtures of carbon dioxide and air in precision for calibrating instruments used in detecting and recordin carbon dioxide content in boiler flue and stock determinations, the requirements are rigid. By the present invention, construction may be had which allows accurate mixing of gaseous components, and in continuous manner, and with relative simplicity. Other objects and advantages of the invention will appear from the following description.
To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and the annexed drawing setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principle of the invention may be employed.
In said annexed drawing:
Fig. 1 is a fragmentary side elevational view showing an embodiment of the invention;
Fig. 2 is a fragmentary axial section of the lefthand portion of the mixing chamber;
Fig. 3 is a fragmentary axial section of an intermediate portion of the chamber;
Fig. 4 is a transverse section taken on plane indicated by line IV, Fig. 3; and
Fig. 5 is a fragmentary axial vertical section of the right-hand end of the apparatus.
As shown at Fig. 2, the initial contact of the gases to be mixed. is provided by head-on. jetting of gas stream against gas stream under pressure from pipes 2, 3, near the closed end 4 of a mixing chamber. The pipe 2 is connected with the source of high pressure gas, for example, a container or cylinder 5 with outlet head 6, and redueing valve 1, with high pressure gauge 8 and lower pressure gauge 9. From the reducing valve, pipe 2 connects through a pressure regulator or a constant difierential flow regulator l0 and gauge H and flow orifice l2 to the mixing chamber. The opposed gas pipe 3 leads from a source of gas under pressure, also through a pressure regulator l0, gauge II and flow-orifice [2. As thus seen, the two streams of gas, under pressure, violently impinge head-on in the mixing chamber and swirl thence through a series of baffles l4. Preferably, the mixing chamber as a whole, for convenience, is made up of assemblable sections a, b, c, d, e, y, and in whichever sections desired, as for example the sections l6 between each of the sections 1), c, d, e, two baiiie plates each are carried. These baffles [4, as shown in Figs. 3 and 4 are desirably of disc form, held in the section casing suitably, as shown by welding, each baflie plate. having evenly spaced holes, the diameter of which may depend somewhat on the gases being mixed. The number of baflle plates, and the number of sections 12,0, etc., can also be varied as desired. With particular convenience, the sections making up the mixer may bescrew-threadedly connected. Thus, assembly and disassembly is facilitated. In some instances, the sections a and 3 may be pipeof suitable size for the particular situation involved, and sections 1), c, d, e, may be pipe couplings connecting intermediate sections It, The assembly is suitably supported. safeguarding the connecting lines 2, 3, and in one form may be conveniently held to the gas container 5 by holding clamp l1 and screw-threaded means [8. Beyond the series of bafll'es, the section 1 is closed at the end 20, and provides discharge means. Preferably, this is in the form of a discharge pipe 2| having an elbow bend 22 directed in the axial center. This pipe, with suitable control valve may thus. lead off a mixed gas product as desired. An additional discharge pipe 23, suitably valve controlled, is also desirably provided axially positioned in the end plate 20.
The operation will be understood from the foregoing. For example, if it is desired to make up a mixture of CO2 and air for calibrating usage, carbon dioxide gas at around 500 lbs. per sq. in. may be taken from the container 5 through the reducing valve 1, regulator l0 .and flow-orifice iii, the pressure being reduced as desired, for instance to 5 lbs. per sq. in., and constant pressure, as measured by the gauge II on the upstream side of the orifice I2, is supplied through the pipe 2. In the particular usage described, this flow-orifice may be & in. .By proper adjustment of the regulator III, the desired rate of carbon dioxide flow is provided. In like manner, the desired proportioned flow of compressed air may be provided through the regulator l0 and the floworifice [2, for gauge pressure, for example usually about 3 or 4 lbs. per sq. in. at the gauge II. The two gas streams abut violently head-on in the mixing section a, and swirling through the spaced bafiies I4 are rapidly and completely mixed, and the mixed product is drawn off, as by pipeZl.
Illustrative of percentage mixing which may be attained with accuracy, the following runs for Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be employed.
I therefore particularly point out and distinctly claim as my invention:
1. In gas mixing apparatus, a compressed gas container, an outlet pipe therefrom having a reducing valve, a pressure regulator, pressure gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipe enters radially near one end, means for holding said mixing chamber to said container, another pipe for a compressed gas with a pressure regulator, pressure gauge and flow-orifice and entering said mixing chamber diametrally spaced to the aforesaid pipe for the jetting of the gas streams head-on against each other, an expansion mixing space surrormding the ends of said entering pipes and extending to perforated baffles in sections screw-threadedly connected on serially, a discharge section, a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall, and another discharge pipe extending axially of said section.
2. In gas mixing apparatus, a compressed gas container, an outlet pipe therefrom having a reducing valve, a pressure regulator, gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipe enters radially near one end, another pipe for a compressed gas with a pressure regulator, pressure gauge and floworifice and entering said mixing chamber diametrally spaced to the aforesaid pipe for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes and extending to perforated bafiles in sections screw-threadedly connected on serially, a discharge section, a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall, and another discharge pipe extending axially of said section.
3. In gas mixing apparatus, pressure gas supplied pipes each with a pressure regulator, gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipes enter diametrally spaced for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, perforated baflies through which the gas mixture then flows, said bafiies being in sections screw-threadedly connected on serially, a discharge section, and a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall.
4. In gas mixing apparatus, pressure gas supplied pipes each with a pressure regulator, gauge and flow-orifice, a cylindrical multi-section mixing chamber into which said pipes enter diametrally spaced for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, perforated bafiles through which the gas mixture then flows, a discharge section, and a discharge pipe having an elbow bend in the axial center of said section and an exit radially directed through the side wall.
5. In gas mixing apparatus, a multi-section mixing chamber, pressure gas supply pipes entering said chamber diametrally spaced to each other for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, perforated bafiles through which the gas mixture then flows, said baflles being in sections screwthreadedly connected on serially, and a discharge section with a discharge pipe.
6. In gas mixing apparatus, a multi-section mixing chamber, pressure gas supply pipes entering said chamber diametrally spaced to each other for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, and a series of perforated baffles through which the gas mixture then flows.
'7. In gas mixing apparatus, a mixing chamber, feed pipes for respective gases entering said chamber diametrally spaced for the jetting of the gas streams head-on against each other, an expansion mixing space surrounding the ends of said entering pipes, a series of spaced perforated bafiles through which the gas mixture then flows, and outlet means therebeyond.
THERLIS L. CLIFT.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 253,908 Brady Feb. 21, 1882 1,154,868 McHenry Sept. 28, 1915 1,510,366 Whiteman Sept. 30, 1924 1,931,698 Holzapfel Oct. 24, 1933 2,312,639 Gronemeyer Mar. 2, 1943 2,363,625 Swearingen Nov. 28, 1944 2,434,374 Tull Jan. 13, 1948 FOREIGN PATENTS Number Country Date 42,241 France Mar. 21, 1933
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19950950 US2600733A (en) | 1950-12-06 | 1950-12-06 | Gas mixing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19950950 US2600733A (en) | 1950-12-06 | 1950-12-06 | Gas mixing apparatus |
Publications (1)
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US2600733A true US2600733A (en) | 1952-06-17 |
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US19950950 Expired - Lifetime US2600733A (en) | 1950-12-06 | 1950-12-06 | Gas mixing apparatus |
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US (1) | US2600733A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2986873A (en) * | 1957-08-13 | 1961-06-06 | Smith William George | Exhaust gas purifiers |
US3100627A (en) * | 1957-04-03 | 1963-08-13 | Rolls Royce | By-pass gas-turbine engine |
US3128794A (en) * | 1963-01-08 | 1964-04-14 | Du Pont | Fluid flow inverter |
US3196608A (en) * | 1959-06-23 | 1965-07-27 | Rolls Royce | Apparatus to admix by-pass air with exhaust gases in a by-pass gas-turbine engine |
US3499632A (en) * | 1966-04-27 | 1970-03-10 | Sinclair Research Inc | Mixing apparatus |
US3517643A (en) * | 1968-11-25 | 1970-06-30 | Sylvania Electric Prod | Vapor deposition apparatus including diffuser means |
US4142413A (en) * | 1976-06-08 | 1979-03-06 | N.V. Nederlandse Gasunie | Device for improving the flow profile in a gas line |
US5255716A (en) * | 1988-12-13 | 1993-10-26 | Total Compagnie Francaise Des Petroles | Pipe rectifier for stabilizing fluid flow |
US5341848A (en) * | 1989-07-20 | 1994-08-30 | Salford University Business Services Limited | Flow conditioner |
US5495872A (en) * | 1994-01-31 | 1996-03-05 | Integrity Measurement Partners | Flow conditioner for more accurate measurement of fluid flow |
EP0942220A1 (en) * | 1998-03-13 | 1999-09-15 | Gaz De France | Flow conditioner for gas conveying pipes |
US20050185508A1 (en) * | 2004-02-23 | 2005-08-25 | Wolfgang Schulz-Hanke | Static mixer |
US20060006022A1 (en) * | 2002-09-18 | 2006-01-12 | Savant Measurement Corporation | Apparatus for filtering ultrasonic noise within a fluid flow system |
US20080246277A1 (en) * | 2007-04-04 | 2008-10-09 | Savant Measurement Corporation | Multiple material piping component |
US20130215709A1 (en) * | 2012-02-17 | 2013-08-22 | Bengt Olle Hinderson | Mixing device |
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US253908A (en) * | 1882-02-21 | Main for conveying fluids | ||
US1154868A (en) * | 1913-11-24 | 1915-09-28 | Clyde D Mchenry | Emulsifier. |
US1510366A (en) * | 1920-08-20 | 1924-09-30 | Whiteman S Supurb Carburettor | Fuel mixer |
FR42241E (en) * | 1932-08-30 | 1933-06-16 | Method and apparatus for spraying molten and pulverized bodies and new industrial products resulting therefrom | |
US1931698A (en) * | 1931-03-30 | 1933-10-24 | Richfield Oil Company | Fuel system for internal combustion engines |
US2312639A (en) * | 1940-08-02 | 1943-03-02 | Monsanto Chemicals | Apparatus for treating plastic material |
US2363625A (en) * | 1942-03-06 | 1944-11-28 | Daviss Collett Jr J | Sampling device |
US2434374A (en) * | 1943-06-01 | 1948-01-13 | Westinghouse Electric Corp | Unitary refrigerated carbonated beverage dispensing apparatus |
-
1950
- 1950-12-06 US US19950950 patent/US2600733A/en not_active Expired - Lifetime
Patent Citations (8)
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US253908A (en) * | 1882-02-21 | Main for conveying fluids | ||
US1154868A (en) * | 1913-11-24 | 1915-09-28 | Clyde D Mchenry | Emulsifier. |
US1510366A (en) * | 1920-08-20 | 1924-09-30 | Whiteman S Supurb Carburettor | Fuel mixer |
US1931698A (en) * | 1931-03-30 | 1933-10-24 | Richfield Oil Company | Fuel system for internal combustion engines |
FR42241E (en) * | 1932-08-30 | 1933-06-16 | Method and apparatus for spraying molten and pulverized bodies and new industrial products resulting therefrom | |
US2312639A (en) * | 1940-08-02 | 1943-03-02 | Monsanto Chemicals | Apparatus for treating plastic material |
US2363625A (en) * | 1942-03-06 | 1944-11-28 | Daviss Collett Jr J | Sampling device |
US2434374A (en) * | 1943-06-01 | 1948-01-13 | Westinghouse Electric Corp | Unitary refrigerated carbonated beverage dispensing apparatus |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3100627A (en) * | 1957-04-03 | 1963-08-13 | Rolls Royce | By-pass gas-turbine engine |
US2986873A (en) * | 1957-08-13 | 1961-06-06 | Smith William George | Exhaust gas purifiers |
US3196608A (en) * | 1959-06-23 | 1965-07-27 | Rolls Royce | Apparatus to admix by-pass air with exhaust gases in a by-pass gas-turbine engine |
US3128794A (en) * | 1963-01-08 | 1964-04-14 | Du Pont | Fluid flow inverter |
US3499632A (en) * | 1966-04-27 | 1970-03-10 | Sinclair Research Inc | Mixing apparatus |
US3517643A (en) * | 1968-11-25 | 1970-06-30 | Sylvania Electric Prod | Vapor deposition apparatus including diffuser means |
US4142413A (en) * | 1976-06-08 | 1979-03-06 | N.V. Nederlandse Gasunie | Device for improving the flow profile in a gas line |
US5255716A (en) * | 1988-12-13 | 1993-10-26 | Total Compagnie Francaise Des Petroles | Pipe rectifier for stabilizing fluid flow |
US5341848A (en) * | 1989-07-20 | 1994-08-30 | Salford University Business Services Limited | Flow conditioner |
US5529093A (en) * | 1994-01-31 | 1996-06-25 | Integrity Measurement Partners | Flow conditioner profile plate for more accurate measurement of fluid flow |
US5495872A (en) * | 1994-01-31 | 1996-03-05 | Integrity Measurement Partners | Flow conditioner for more accurate measurement of fluid flow |
EP0942220A1 (en) * | 1998-03-13 | 1999-09-15 | Gaz De France | Flow conditioner for gas conveying pipes |
FR2776033A1 (en) * | 1998-03-13 | 1999-09-17 | Gaz De France | FLOW CONDITIONER FOR GAS TRANSPORT PIPING |
US6145544A (en) * | 1998-03-13 | 2000-11-14 | Gaz De France | Flow conditioner for a gas transport pipe |
US7303047B2 (en) | 2002-09-18 | 2007-12-04 | Savant Measurement Corporation | Apparatus for filtering ultrasonic noise within a fluid flow system |
US20060006022A1 (en) * | 2002-09-18 | 2006-01-12 | Savant Measurement Corporation | Apparatus for filtering ultrasonic noise within a fluid flow system |
US20060011413A1 (en) * | 2002-09-18 | 2006-01-19 | Savant Measurement Corporation | Method for filtering ultrasonic noise within a fluid flow system |
US20060011412A1 (en) * | 2002-09-18 | 2006-01-19 | Savant Measurement Corporation | Apparatus for filtering ultrasonic noise within a fluid flow system |
US7303046B2 (en) | 2002-09-18 | 2007-12-04 | Savant Measurement Corporation | Apparatus for filtering ultrasonic noise within a fluid flow system |
US7303048B2 (en) | 2002-09-18 | 2007-12-04 | Savant Measurement Corporation | Method for filtering ultrasonic noise within a fluid flow system |
US20050185508A1 (en) * | 2004-02-23 | 2005-08-25 | Wolfgang Schulz-Hanke | Static mixer |
US7484881B2 (en) * | 2004-02-23 | 2009-02-03 | Hilti Aktiengesellschaft | Static mixer |
US20080246277A1 (en) * | 2007-04-04 | 2008-10-09 | Savant Measurement Corporation | Multiple material piping component |
US7845688B2 (en) | 2007-04-04 | 2010-12-07 | Savant Measurement Corporation | Multiple material piping component |
US20130215709A1 (en) * | 2012-02-17 | 2013-08-22 | Bengt Olle Hinderson | Mixing device |
US9878293B2 (en) * | 2012-02-17 | 2018-01-30 | SoftOx Solutions AS | Mixing device |
US20180147548A1 (en) * | 2012-02-17 | 2018-05-31 | SoftOx Solutions AS | Mixing device |
US10906014B2 (en) * | 2012-02-17 | 2021-02-02 | Wiab Water Innovation Ab | Mixing device |
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