US2252581A - Selector - Google Patents

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US2252581A
US2252581A US274036A US27403639A US2252581A US 2252581 A US2252581 A US 2252581A US 274036 A US274036 A US 274036A US 27403639 A US27403639 A US 27403639A US 2252581 A US2252581 A US 2252581A
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inlet
deflector
secondary
air
body
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US274036A
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Saint-Jacques Eugene Camille
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Saint-Jacques Eugene Camille
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/18Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations with auxiliary fluid assisting discharge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08Vortex chamber constructions
    • B04C5/103Bodies or members, e.g. bulkheads, guides, in the vortex chamber

Description

Aug. 12, 1941. E. c. SAINT-JACQUES SELECTOR Filed May 16, 1959 INVENTOR. U6ENE Can/1.1.: Sm/vr- JQCQUES.

BY allw W W ATTORNEYS.

Patented Aug. 12, 1941 OFFICE SELECTOR Eugene Camille Saint-Jacques, Paris, France Application May 16, 1939, Serial No. 274,036

' In France May 25, 1938 Claims.

The present invention relates to apparatus intended for the separation and classification of solid particles held in suspension in a gaseous fluid, and more particularly to apparatus of the cyclone type. i. e. comprising a cylindrical body in which a current of fluid under pressure charged with solid particles is introduced tangentially, the bodybeing connected at its upper end to suction means creating an upward suction current and being continued at its lower end by a conical portion provided with an outlet aperture for dust. In such apparatus the current of fluid admitted tangentially has a downward whirling movement imparted to it, which causes separation and classification of the solid particles increasing more and more as the current moves downwards. .The coarser particles are flung against the wall of the cylindrical body and slide down the lower cone to the outlet at the bottom, while the finer particles remaining in the vicinity of the axis of the cylindrical body are flectors, for the purpose of ensuring what may be called a rinsing of the solid particles, that is separating from the coarse or medium particles the line particles which might otherwise remain imprisoned between the latter. Now it has been found that the whirling movement impressed on the currents of secondary air so introduced tangentially into the cylindrical body, in combination with the whirling movement of the principal descending current, may give rise insome zones to an insuificient acceleration or too great an acceleration of the solid particles in suspension in this current and that very sensitive regulation in certain cases becomes difiicult.

If endeavours are made to overcome this drawback by arranging the inlets for secondary air in a radial disposition or at a certain angle to the direction of the principal whirling current, difficulty is involved in obtaining a uniform distribution of the rinsing air over the whole of the internal periphery of the cylindrical body.

The invention is directed to an improvement applied to classifiers of the kind indicated with the object of obviating the above disadvantage and of ensuring a greater eflicaciousness of the rinsing produced by the current or currents of secondary air.

The improvement according to the invention.

secondary air inlets an annular substantially horizontal deflector which has the efiect of accelerating the centrifugal action by confining the air to a fairly narrow channel. In this stage of the rinsing it is then possible to extract extremely flne dust because of the acceleration of the centrifugal -eflect. The other secondary air' inlet or inlets may have no particular device for this purpose or they may have either an annular deflector similar to the above-mentioned de flector, or a device adapted to subdivide the current of secondary air and placed opposite the air inlet under consideration below the conical deflector. Such a device may be for example a cylinder of perforated sheet metal, a ring of vanes or the like. With the latter devices the second current of rinsing air is admitted with the maximum of centrifugal effect and can carry out the extraction of coarser particles than otherwise due to the fact that it traverses the surface of material perpendicularly.

The combination of these two arrangements makes it possible according to the quantity of air distributed between the rinsing systems operating in different manners to obtain maximum sensitiveness of operation and a greater certainty in the grading of the particles.

In the accompanying drawing Figure 1 shows by way of example a form of construction of an improved cyclone dust classifler according to the invention in axial verticalsection.

Figure 2 is a similar section showing a ring of vanes as referred to above in association with a secondary air inlet means.

Referring to the drawing 1 is the cylindrical body of the cyclone comprising a part la of larger diameter in the rinsing zone and a lower conical extension 2 provided with a discharge aperture 3 for the coarse and medium particles. An inlet duct 4 for the fluid charged with the materials to be separated and classified is connected tangentially to the cylindrical body I. In this latter is disposed in a known manner an inverted trlmcated cone 5 of which the base is attached to the wall of thebody l by a ring of vanes 6 and of which the top is in communication by a duct 1 with the inlet of a fan (not shown). 8 and 9 denote two inlets for secondary air connected tangentially to the portion Id of the classified body; opposite these inlets are disposed in the known manner conical deflectors I0 and II respectively.

Below the secondary air inlet I there is an consists in disposing below at least one of the annular horizontal deflector I2 and below the air inlet 8 in contact with the conical deflector l I is disposed a cylinder of perforated sheet metal l3, preferably attached to the conical deflector ll. Between the lower end of the perforated cylinder l3 and the cone 2 below it suflicient space is left to permit the escape of any dust which may have lodged in the space between the cone I I, the wall Ia and the cylinder l3 when the apparatus is operated on the closed circuit principle. The perforated cylinder i3 may be replaced by any equivalent device, for example by rings of vanes II in Figure 2.

As will be clear from the above explanations, the current of fluid under pressure charged with solid particles descends with whirling motion in the body l-|a. The centrifugal force drives the coarser particles towards the periphery, while the rising current of fluid due to upward suction traverses the apparatus axially and carries with it the finer particles which have remained at the inner part of the descending whirling current. The secondary air entering by the duct 8 is confined by the horizontal deflector l2 and the conical deflector III to a fairly narrow annular channel and on emerging therefrom is rotating in the opposite direction to the descending whirling current on which it acts tangentially. The secondary air entering by the duct 8 is distributed over the perforated cylinder [3, which breaks up the rotation and ensures a fairly uniform distribution of the air in the form of a plurality of jets directed inwards. The vane arrangement l4 in Fig. 2 has a similar effect. These jets traverse the descending whirling current perpendicularly to the motion of the latter. In this way an efllcacious rinsing of the particles is ensured.

The construction shown may be modified in various ways. Thus, the apparatus may comprise only a single inlet for rinsing air, or it may comprise more than two. If there is morethan one secondary air inlet, the several inlets may be provided with horizontal annular deflectors only or with perforated cylinders only or with rings of vanes only.

It may be necessary to deal in particular with mixtures of pulverulent materials in which the very fine or very light particle are in a large proportion, and it may be desired to extract all these particles in a single operation without carrying away the coarser or heavier elements. In this case it will be preferable in the above example of construction to combine'with the secondary air inlet 8 nota perforated cylinder l3, but an annular horizontal deflector disposed below this air inlet, just as the deflector I2 is disposed below the secondary air inlet 8.

If instead of two secondary air inlets there are more than two, such an annular horizontal deflector can be disposed below each of them.

With these arrangements the rotation of the What I claim is:

1. In a cyclone selector for solid particles, a cylindrical body having a tangential inlet through which a gaseous fluid containing the solid particles to be classified enters said body, and an upper outlet communicating with suction means and a lower outlet for discharging the largest particles, a secondary tangential inlet below said first named inlet, an inverted frustroconical deflector having its upper and outer edge secured to said body below said first named inlet and above said secondary inlet and extending downwardly and inwardly past said secondary inlet to direct a blast of material entering therethrough, said deflector having a free lower end forming a central passage for air and material, and an annular horizontal deflector attached to the wall of said body substantially opposite the free end of said .frustro-conical deflector, and disposed to reduce the space between the narrow end of said frustro-conical deflector and said body whereby to increase the whirling speed of air entering through said secondary air inlet.

2. In a cyclone selector for solid particles, a cylindrical body having a tangential inlet through which a gaseous fluid containing the solid particles to be classified enters said body, and an upper outlet communicating with suction means and a lower outlet for discharging the largest particles, a secondary tangential inlet below said first named inlet, an inverted frustraconical deflector having its upper and outer edge secured to said body below said first named inlet and above said secondary inlet and extending downwardly and inwardly past said secondary inlet to direct a blast of material entering therethrough, said deflector having a free lower end forming a central passage for air and material,

' and means in association with the narrow end materials in suspension will be maintained at. I

' all levels in the apparatus, and at each stage of minimum risk of carrying away the heavier or denser particles.

of said frustro-conical deflector for diminishing the whirling speed of air entering through said secondary inlet, said means comprising a perforated cylinder attached to the said frustroconical deflector.

3. In a cyclone selector for solid particles, a cylindrical body having a tangential inlet through which a gaseous fluid containing the solid particles to be classified enters said body, and an upper outlet communicating with suction means and a lower outlet for discharging the largest particles, a secondary tangential inlet below said first named inlet, an inverted frustroconical deflector having its upper and outer edge secured to said body below said first named inlet and above said secondary inlet and extending downwardly and inwardly past said secondary inlet to direct a blast of material entering therethrough, said deflector having a free lower end forming a central passage for air and material, and means in association with the narrow end of said frustro-conical deflector for diminishing the whirling speed of air entering through said secondary inlet, said means comprising a ring of vanes located between said body and the narrow end of said frustro-conical deflector.

4. In a cyclone selector for solid particles, a cylindrical body having a tangential through which a gaseous fluid containing the solid particles to be classified enters said body, and an upper outlet communicating with suction means and a lower outlet for discharging the largest particles, a secondary tangential inlet below said first named inlet, an inverted frustroconical deflector having its upper and outer edge secured to said body below said first named inlet inlet 7 and above said secondary inlet and extending downwardly and inwardly past said secondary inlet to direct a blast of material entering therethrough, said deflector having a free lower end forming a central passage for air and material, and an annular horizontal deflector attached to the wall of said body substantially opposite the free end of said frustro-conical deflector, and disposed to reduce the space between the narrow end of said frustro-conical deflector and said body whereby to increase the whirling speed of air entering through said secondary air inlet, another secondary tangential air inlet located below the first, a frustro-conical deflector opposite said inlet to direct awhirling blast of air entering therethrough, and means in association with the narrow end of said last mentioned frustro-conical deflector for diminishing the whirling speed of air entering through said last mentioned secondary inlet, said means comprising a perforated cylinder attached to said last mentioned frustro-conical deflector.

5. In a cyclone selector for solid particles, a cylindrical body having a tangential inlet through which a gaseous fluid containing the solid particles to be classified enters said body, and an upper outlet communicating with suction means and a lower outlet for discharging the largest particles, a secondary tangential inlet below said first named inlet, an inverted frustroconical deflector having its upper and outer edge secured to said body below said first named inlet and above said secondary inlet and extending downwardly and inwardly past said secondary inlet to direct a blast of material entering therethrough, said deflector having a free lower end forming a central pasage for air and material, and an annular horizontal deflector attached to the wall of said body substantially opposite the free end of said frustro-conical deflector, and disposed to reduce the space between the narrow end of said frustro-conical deflector and said body whereby to increase the whirling speed of air entering through said secondary air inlet, another secondary tangential air inlet located below the first, a frustro-conical deflector opposite said inlet to direct a whirling blast of air entering therethrough, and means in association with the narrow end of said last mentioned frustro-conical deflector for diminishing the whirling speed of air entering through said last mentioned secondary inlet, said means comprising a ring of vanes located between said body and the narrow end of said last mentioned frustro-conical deflector.

EUGENE CAMILLE SAINT-JACQUES.

US274036A 1938-05-25 1939-05-16 Selector Expired - Lifetime US2252581A (en)

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Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494465A (en) * 1945-05-23 1950-01-10 Aerotec Corp Apparatus for classifying particles
US2590691A (en) * 1945-07-31 1952-03-25 Directie Staatsmijnen Nl Process for the separation of solid substances of different specific gravity and grain size
US2624460A (en) * 1946-04-03 1953-01-06 Schutz O Neill Co Gas separator for grinding mills
US2638218A (en) * 1949-11-21 1953-05-12 Farm Production Engineers Inc Method of separating dispersed matter from fluid masses
US2641335A (en) * 1946-01-12 1953-06-09 Union Oil Co Gas-solid separator
US2650675A (en) * 1950-03-09 1953-09-01 Bituminous Coal Research Method and apparatus for the separation of particulate material from entraining gaseos fluids
US2708033A (en) * 1951-06-12 1955-05-10 Prater Pulverizer Company Fractionator
US2726767A (en) * 1951-08-14 1955-12-13 Rakowsky Victor Densifying of solids-liquid mixtures
US2765867A (en) * 1952-06-19 1956-10-09 Stamicarbon Method of separating dispersed gas from a liquid
US2873815A (en) * 1955-12-05 1959-02-17 Swayze Rue Elston Apparatus for purifying exhaust gases
US2929501A (en) * 1957-01-30 1960-03-22 Int Minerals & Chem Corp Cyclone separator
US3039608A (en) * 1958-05-08 1962-06-19 Wikdahl Nils Anders Lennert Method and apparatus for separating fibrous suspensions in hydrocyclones
US3130157A (en) * 1958-12-15 1964-04-21 Denis F Kelsall Hydro-cyclones
US3150943A (en) * 1960-10-27 1964-09-29 Gen Electric Cyclone-type dust collector
US3199270A (en) * 1960-03-25 1965-08-10 Siemens Ag Apparatus for mixing and separating substances of different mass-inertia
US3199269A (en) * 1958-08-22 1965-08-10 Siemens Ag Particle-from-gas separators
US3199271A (en) * 1958-08-22 1965-08-10 Siemens Ag Apparatus for separating flowing media of respectively different mass inertia
US3232430A (en) * 1961-11-17 1966-02-01 Saint-Jacques Eugene Camille Classification selectors for solids in gaseous suspension
US3323646A (en) * 1963-12-13 1967-06-06 Humphreys Eng Co Cyclonic counterflow separator
US3433422A (en) * 1965-07-14 1969-03-18 Entoleter Method and apparatus for rotary processing and classification
US3455450A (en) * 1967-02-15 1969-07-15 Tyler Inc W S Method and apparatus for sizing of discrete particles in a fluid medium
US3489464A (en) * 1966-04-16 1970-01-13 Fuller Co Fluidizing discharge apparatus for removal of fluidized material from a conveying system
US3535850A (en) * 1966-10-28 1970-10-27 Hans J P Von Ohain Centrifugal particle separator
US3667600A (en) * 1968-11-27 1972-06-06 Kazuo Oi Method and apparatus for centrifugal classification
DE2062381A1 (en) * 1970-12-18 1972-06-29 Sueddeutsche Kuehler Behr
US3716137A (en) * 1969-03-21 1973-02-13 Celleco Ab Cyclone separator
US3789588A (en) * 1970-06-18 1974-02-05 Sulzer Ag Liquid separator for a steam-water mixture
USB313098I5 (en) * 1972-12-07 1975-01-28
US3874738A (en) * 1973-02-05 1975-04-01 Wacker Chemie Gmbh Process and apparatus for the rapid transfer of a product from a gas stream into a carrier gas stream
US3951620A (en) * 1974-09-19 1976-04-20 Shell Oil Company Separation apparatus and process
US3990870A (en) * 1972-10-05 1976-11-09 Gerhard Miczek Means and method for separating and collecting particulate matter from a gas flow
US4097381A (en) * 1976-02-27 1978-06-27 Ab Filtrator Separator with throw-away container
US4222858A (en) * 1979-06-11 1980-09-16 Avila Maximo L Particle separator
US4257786A (en) * 1978-08-28 1981-03-24 Snow Brand Milk Products Co., Ltd. Cyclone separator
US4278452A (en) * 1978-08-28 1981-07-14 Snow Brand Milk Products Co., Ltd. Cyclone separator
US4325716A (en) * 1980-05-28 1982-04-20 Livemore Gerald S V Mixing chamber in combination with a dust cyclone separator
US4498819A (en) * 1982-11-08 1985-02-12 Conoco Inc. Multipoint slurry injection junction
US4593429A (en) * 1980-06-19 1986-06-10 Prototypes, Ltd. Vacuum cleaning appliance
US4664160A (en) * 1984-11-19 1987-05-12 Ormont Corporation Fiber filling system
US4743363A (en) * 1986-09-25 1988-05-10 The Dexter Corporation Classifying cyclone
US5006018A (en) * 1986-06-19 1991-04-09 Filter Queen Ltd. Feed and separation device
US5165549A (en) * 1988-02-09 1992-11-24 Canon Kabushiki Kaisha Gas current classifying separator
US5542544A (en) * 1994-10-24 1996-08-06 Coors Brewing Company Apparatus and method for separating low density solids from an airflow
US5845782A (en) * 1996-04-08 1998-12-08 Hurricane Pneumatic Conveying, Inc. Separator for removing fine particulates from an air stream
US6270545B1 (en) * 1999-03-10 2001-08-07 Kwangju Institute Of Science And Technology Cyclone for measuring and controlling amount of suspended dust
WO2003048013A1 (en) * 2001-12-04 2003-06-12 Ecotechnology, Ltd. Flow development chamber
EP1322427A1 (en) * 2000-06-15 2003-07-02 Sigma Process Solutions Pty Ltd. Particle classification
US20030182757A1 (en) * 2002-03-26 2003-10-02 White Consolidated Ltd. Filtration arrangement of a vacuum cleaner
US20030204930A1 (en) * 2000-01-14 2003-11-06 Thomas Hawkins Upright vacuum cleaner with cyclonic air path
US20030233938A1 (en) * 2000-01-14 2003-12-25 Sepke Arnold L. Bagless dustcup
US20040074534A1 (en) * 2001-12-04 2004-04-22 Ecotechnology, Ltd. Flow development chamber
US6749374B1 (en) 1997-12-11 2004-06-15 Ecotechnology, Ltd. Flow development chamber for creating a vortex flow and a laminar flow
US20050000581A1 (en) * 2001-12-04 2005-01-06 Lane Darin L. Axial input flow development chamber
WO2006010881A1 (en) * 2004-07-29 2006-02-02 Dyson Technology Limited Cyclonic separating apparatus
US20100125939A1 (en) * 2008-11-24 2010-05-27 Airbus Operations Gmbh Cyclone separator
US20130152878A1 (en) * 2013-02-17 2013-06-20 GroupAg LLC Regenerative Vapor/Particle Generator
US9211547B2 (en) 2013-01-24 2015-12-15 Lp Amina Llc Classifier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943698A (en) * 1960-07-05 Cyclone-type separator
US2607438A (en) * 1948-06-30 1952-08-19 Standard Oil Dev Co Cyclone separator

Cited By (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494465A (en) * 1945-05-23 1950-01-10 Aerotec Corp Apparatus for classifying particles
US2590691A (en) * 1945-07-31 1952-03-25 Directie Staatsmijnen Nl Process for the separation of solid substances of different specific gravity and grain size
US2641335A (en) * 1946-01-12 1953-06-09 Union Oil Co Gas-solid separator
US2624460A (en) * 1946-04-03 1953-01-06 Schutz O Neill Co Gas separator for grinding mills
US2638218A (en) * 1949-11-21 1953-05-12 Farm Production Engineers Inc Method of separating dispersed matter from fluid masses
US2650675A (en) * 1950-03-09 1953-09-01 Bituminous Coal Research Method and apparatus for the separation of particulate material from entraining gaseos fluids
US2708033A (en) * 1951-06-12 1955-05-10 Prater Pulverizer Company Fractionator
US2726767A (en) * 1951-08-14 1955-12-13 Rakowsky Victor Densifying of solids-liquid mixtures
US2765867A (en) * 1952-06-19 1956-10-09 Stamicarbon Method of separating dispersed gas from a liquid
US2873815A (en) * 1955-12-05 1959-02-17 Swayze Rue Elston Apparatus for purifying exhaust gases
US2929501A (en) * 1957-01-30 1960-03-22 Int Minerals & Chem Corp Cyclone separator
US3039608A (en) * 1958-05-08 1962-06-19 Wikdahl Nils Anders Lennert Method and apparatus for separating fibrous suspensions in hydrocyclones
US3199269A (en) * 1958-08-22 1965-08-10 Siemens Ag Particle-from-gas separators
US3199271A (en) * 1958-08-22 1965-08-10 Siemens Ag Apparatus for separating flowing media of respectively different mass inertia
US3199268A (en) * 1958-08-22 1965-08-10 Siemens Ag Particle-from-gas separators
US3130157A (en) * 1958-12-15 1964-04-21 Denis F Kelsall Hydro-cyclones
US3199270A (en) * 1960-03-25 1965-08-10 Siemens Ag Apparatus for mixing and separating substances of different mass-inertia
US3150943A (en) * 1960-10-27 1964-09-29 Gen Electric Cyclone-type dust collector
US3232430A (en) * 1961-11-17 1966-02-01 Saint-Jacques Eugene Camille Classification selectors for solids in gaseous suspension
US3323646A (en) * 1963-12-13 1967-06-06 Humphreys Eng Co Cyclonic counterflow separator
US3433422A (en) * 1965-07-14 1969-03-18 Entoleter Method and apparatus for rotary processing and classification
US3489464A (en) * 1966-04-16 1970-01-13 Fuller Co Fluidizing discharge apparatus for removal of fluidized material from a conveying system
US3535850A (en) * 1966-10-28 1970-10-27 Hans J P Von Ohain Centrifugal particle separator
US3455450A (en) * 1967-02-15 1969-07-15 Tyler Inc W S Method and apparatus for sizing of discrete particles in a fluid medium
US3667600A (en) * 1968-11-27 1972-06-06 Kazuo Oi Method and apparatus for centrifugal classification
US3716137A (en) * 1969-03-21 1973-02-13 Celleco Ab Cyclone separator
US3789588A (en) * 1970-06-18 1974-02-05 Sulzer Ag Liquid separator for a steam-water mixture
DE2062381A1 (en) * 1970-12-18 1972-06-29 Sueddeutsche Kuehler Behr
US3990870A (en) * 1972-10-05 1976-11-09 Gerhard Miczek Means and method for separating and collecting particulate matter from a gas flow
USB313098I5 (en) * 1972-12-07 1975-01-28
US3925045A (en) * 1972-12-07 1975-12-09 Phillips Petroleum Co Multistage cyclonic separator
US3874738A (en) * 1973-02-05 1975-04-01 Wacker Chemie Gmbh Process and apparatus for the rapid transfer of a product from a gas stream into a carrier gas stream
US3951620A (en) * 1974-09-19 1976-04-20 Shell Oil Company Separation apparatus and process
US4097381A (en) * 1976-02-27 1978-06-27 Ab Filtrator Separator with throw-away container
US4278452A (en) * 1978-08-28 1981-07-14 Snow Brand Milk Products Co., Ltd. Cyclone separator
US4257786A (en) * 1978-08-28 1981-03-24 Snow Brand Milk Products Co., Ltd. Cyclone separator
US4222858A (en) * 1979-06-11 1980-09-16 Avila Maximo L Particle separator
US4325716A (en) * 1980-05-28 1982-04-20 Livemore Gerald S V Mixing chamber in combination with a dust cyclone separator
US4593429A (en) * 1980-06-19 1986-06-10 Prototypes, Ltd. Vacuum cleaning appliance
US4498819A (en) * 1982-11-08 1985-02-12 Conoco Inc. Multipoint slurry injection junction
US4664160A (en) * 1984-11-19 1987-05-12 Ormont Corporation Fiber filling system
US5006018A (en) * 1986-06-19 1991-04-09 Filter Queen Ltd. Feed and separation device
US4743363A (en) * 1986-09-25 1988-05-10 The Dexter Corporation Classifying cyclone
US5165549A (en) * 1988-02-09 1992-11-24 Canon Kabushiki Kaisha Gas current classifying separator
US5542544A (en) * 1994-10-24 1996-08-06 Coors Brewing Company Apparatus and method for separating low density solids from an airflow
US5845782A (en) * 1996-04-08 1998-12-08 Hurricane Pneumatic Conveying, Inc. Separator for removing fine particulates from an air stream
US6749374B1 (en) 1997-12-11 2004-06-15 Ecotechnology, Ltd. Flow development chamber for creating a vortex flow and a laminar flow
US6270545B1 (en) * 1999-03-10 2001-08-07 Kwangju Institute Of Science And Technology Cyclone for measuring and controlling amount of suspended dust
US6910245B2 (en) 2000-01-14 2005-06-28 White Consolidated Industries, Inc. Upright vacuum cleaner with cyclonic air path
US6863702B2 (en) 2000-01-14 2005-03-08 White Consolidated Ltd. Bagless dustcup
US20030204930A1 (en) * 2000-01-14 2003-11-06 Thomas Hawkins Upright vacuum cleaner with cyclonic air path
US20030233938A1 (en) * 2000-01-14 2003-12-25 Sepke Arnold L. Bagless dustcup
EP1322427A1 (en) * 2000-06-15 2003-07-02 Sigma Process Solutions Pty Ltd. Particle classification
EP1322427A4 (en) * 2000-06-16 2003-07-09 Sigma Process Solutions Pty Lt Particle classification
US7650909B2 (en) 2001-12-04 2010-01-26 Spiroflo, Inc. Flow development chamber
US20070028976A1 (en) * 2001-12-04 2007-02-08 Ecotechnology, Ltd. Flow development chamber
US7082955B2 (en) 2001-12-04 2006-08-01 Ecotechnology, Ltd. Axial input flow development chamber
US20050000581A1 (en) * 2001-12-04 2005-01-06 Lane Darin L. Axial input flow development chamber
US7066207B2 (en) * 2001-12-04 2006-06-27 Ecotechnology, Ltd. Flow development chamber
WO2003048013A1 (en) * 2001-12-04 2003-06-12 Ecotechnology, Ltd. Flow development chamber
US6659118B2 (en) * 2001-12-04 2003-12-09 Ecotechnology, Ltd. Flow development chamber
US20040074534A1 (en) * 2001-12-04 2004-04-22 Ecotechnology, Ltd. Flow development chamber
US6829804B2 (en) 2002-03-26 2004-12-14 White Consolidated, Ltd. Filtration arrangement of a vacuum cleaner
US20030182757A1 (en) * 2002-03-26 2003-10-02 White Consolidated Ltd. Filtration arrangement of a vacuum cleaner
WO2006010881A1 (en) * 2004-07-29 2006-02-02 Dyson Technology Limited Cyclonic separating apparatus
US7731770B2 (en) 2004-07-29 2010-06-08 Dyson Technology Limited Separating apparatus
US20080302071A1 (en) * 2004-07-29 2008-12-11 Dyson Technology Limited Separating Apparatus
US8631947B2 (en) * 2008-11-24 2014-01-21 Airbus Operations Gmbh Cyclone separator
US20100125939A1 (en) * 2008-11-24 2010-05-27 Airbus Operations Gmbh Cyclone separator
US9211547B2 (en) 2013-01-24 2015-12-15 Lp Amina Llc Classifier
US20130152878A1 (en) * 2013-02-17 2013-06-20 GroupAg LLC Regenerative Vapor/Particle Generator

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FR848204A (en) 1939-10-25
GB528606A (en) 1940-11-01

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