US3244109A - Centrifugal pumps - Google Patents

Centrifugal pumps Download PDF

Info

Publication number
US3244109A
US3244109A US381677A US38167764A US3244109A US 3244109 A US3244109 A US 3244109A US 381677 A US381677 A US 381677A US 38167764 A US38167764 A US 38167764A US 3244109 A US3244109 A US 3244109A
Authority
US
United States
Prior art keywords
impeller
nozzles
vessel
casing
pump
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US381677A
Other languages
English (en)
Inventor
Barske Ulrich Max Willi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3244109A publication Critical patent/US3244109A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/2255—Special flow patterns flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Definitions

  • centrifugal pumps adapted to operate at medium and low fiow rates and relatively high delivery heads. Centrifugal pumps of conventional design are not suitable for such operating conditions which, according to well-known definition, are called low specific speeds. The reason for this is that, under low flow conditions, no reasonably undisturbed flow can be maintained in the channels of the impeller and of the discharge diffuser or diffusers.
  • rotodynamic pumps as, for instance, side channel pumps, turbulence pumps, open impeller pumps and scoop wing pumps are somewhat better suitable for operating at low specific speeds but their efliciencies are satisfactory over a very narrow range of flow rates only and are dependent to a wide extent on maintaining close side clearances between the impeller blades and the pump casing, and the hydraulic output, particularly of the first and second types quoted above, decreases quickly as a result of wear of the mating surfaces of the impeller and of the casing.
  • a scoop wing pump involving a rotating casing does not suffer from this disadvantage but an undesirable feature is the considerahle weight of the rotating casing and it is often difficult to vent the casing properly during operation. Another limiting factor is that this type of pump is preferably suitable for very low flow rates only.
  • centrifugal pump according to the invention yields considerably increased efii-ciences by permitting the following conditions to prevail.
  • the present invention comprises a centrifugal impeller pump with an axial inlet, the impeller being in the form of a circular vessel with an axial inlet eye and with smooth external surfaces and comprising internal vanes or blades, the peripheral region of the vessel being provided with an exit nozzle or nozzles so arranged as to cause the jet or jets discharged thereby to be directed tangentially or substantially tangentially to the periphery of the vessel, the pump casing also having smooth internal ice walls and being provided with at least one peripheral diffuser for discharging the liquid.
  • the nozzle or a series of nozzles may be formed in the peripheral wall of the vessel or may be formed in one or each side wall of the vessel near to the periphery.
  • the interior of the impeller may be provided with straight radial vanes.
  • the nozzles may be formed with their discharge ends situate in the circular external periphery of the peripheral wall of the impeller vessel or they may be constructed to open beyond the external periphery of the peripheral wall to the vessel to achieve a more nearly tangential discharge. They may be formed with their discharge ends in the outer faces of the side walls or they may be constructed to open beyond the said side faces.
  • the interior space of the impeller should be of ample width in the axial direction so that the radial velocity component of the liquid shall be low and commensurate with that of the axial inlet velocity and the space between the outer circular surface area of the impeller and the circular internal wall of the casing, which may be coaxial with the impeller vessel, should also be dimensioned so that the radial velocity component of the liquid discharged by the impeller is low and that a rotating liquid ring can be established in this space and the tangential flow velocity of this ring-shaped liquid body made to equal, in the average, the difference between the impeller peripheral velocity and the impeller nozzle relative exit velocity.
  • the vessel may taper radially outwards to a narrow cylindrical peripheral wall and in order to retain, as far as possible, a smooth circular shape of the impeller the exit nozzles are preferably formed as fiat slots accommodated in the said wall through they may be formed in the outer margins of the end walls. In the latter case the circular outer periphery of the impeller need not be interrupted and this helps to reduce skin friction losses.
  • the nozzles may be directed backwardly, i.e., opposite to the impeller peripheral motion or they may be directed forwardly, i.e., they point in the direction of the latter. In the conventional terminology this means that the exit angles of the nozzles are approximately or 0-", respectively.
  • FIG. 1 is a longitudinal section of a pump
  • FIGS. 2 and 3 show an example of the components of which the impeller can be made
  • FIG. 4 is a cross section 1VIV of FIG. 1, showing in particular the arrangement of the nozzles at the impeller periphery,
  • FIG. 4a is a similar cross section showing modified nozzles
  • FIG. 5 is a longitudinal section of another pump with a different impeller design where the nozzles are accommodated in the end walls of the impeller vessel,
  • FIG. 6 is a developed cylindrical section VIVI of FIG. 5, showing two different shapes of nozzles,
  • FIG. 6a is a similar view to FIG. 6 shows a modified shape of nozzle
  • FIG. 7 is a cross section V11VI1 of FIG. 5,
  • FIG. 8 shows a half longitudinal section of a pump with forwardly directed discharge nozzles of the impeller
  • FIG. 9 is a section lX-IX of FIG. 8 while FIG. 10 is a similar section of a pump in which the forwardly directed nozzles are situated in the end walls of the impeller.
  • FIG. 11 shows a modified pump casing with 5 diffusers for the delivery, while in FIG. 12 an improved diffuser design is shown in a larger scale,
  • FIG. 13 is a longitudinal section through the upper half of an impeller showing a circular section of a reduced diameter and a streamlined nozzle projecting beyond the periphery of this section, while FIG. 14 shows an end view of the whole impeller, and
  • FIG. 15 a section XVXV through the nozzle of FIG. 14.
  • the pump impeller is represented by a circular vessel consisting of the dishlike end walls 11, 12. and a narrow cylindrical section 113.
  • the front wall or shroud 11 carries at its inner portion a short cylindrical section 14 which, on the one hand, represents the inlet eye 15 of the impeller while its external surface forms, together with a wearing ring 16 rfixed in the cover 17 of the casing 1d, a labyrinth seal between the internal space 18 of the casing 17, 19 and the axial inlet duct 15.
  • the back wall or shroud 12 is, by way of example, integral with the hub 20 which, in turn, is screwed on to the shaft 21 by a screw thread 20a.
  • the interior of the impeller is of an ample axial width to keep the radial velocity component sufliciently low and is provided with six radial ribs or vanes 22 while six exit nozzles 26 (see the upper half of FIG. 4 or 24, see the lower half of FIG. 4) are arranged in the peripheral wall 13.
  • the impeller made of two open sections which will then be fixed to each other. This is shown, by way of example, in FIGS. 2 and 3 where the front wall 111, the peripheral section 13 and the inlet piece 14 form one component while the back wall 12 with the vanes 22 and the hub 20 represent the second component to which the first one is fixed by rivets 26, see FIGS. 1 and 4.
  • the co-axial position of both parts is secured by the edges 25 of the vanes 22 which fit into the inside of the section 13.
  • the holes for the rivets 26 are preferably drilled through the vanes which are provided for this purpose with thicker portions 27.
  • FIG. 4 shows two nozzles 23. Nozzles 2-3 can be cut into the section 13 as narrow slots in which case the nosepiece 31 must be well rounded. The jets ejected by these nozzles will not be directed fully tangentially but it is a great advantage of this design that the external surface of 13 can he worked smoothly by turning.
  • FIG. 4a is a view similar to FIG.
  • nozzle 24 of a modified form The nozzles 24 are lllulu difficult to machine but they will give a tangential or more nearly tangential direction to the jets. Also easy to machine are the internal sunfaces of the pump casing 1 9 and the cover 17 as the peripheral wall 1% is circular and coaxial with the impeller. It is most important to have these surfaces and the exterior of the impeller machined as smoothly as possible in order to reduce skin friction losses of the impeller and of the liquid rotating in the spaces 18 and 31. This liquid will be discharged into the pressure line by means Olf aconical (divergent) diffuser 32 arranged tangentially, in well-known way, at the peripheral wall 19a of the casing.
  • Olf aconical (divergent) diffuser 32 arranged tangentially, in well-known way, at the peripheral wall 19a of the casing.
  • the parts designated 31a, 22a, 26a, 27a, 29a and 32]) represent respectively the peripheral section of the vessels, the blades, the rivets, the thicker portions and the recesses corresponding to those described with reference to FIG. 4.
  • a gland 3-3 or other suitable sealing means is arranged in the usual Way between the hub 20 and the pump casing 19.
  • the latter is fixed to a bearing housing 34 or the like of which only a small section is shown.
  • FIGS. 5 and 7 includes an impeller the nozzles 44, of which are located at the margins of its end walls 11, 12.
  • the arrangement of the nozzles is shown in more detail in the two sections of FIG. 6, the shapes of the nozzles 44 and 45 corresponding to those of the nozzles 23 and 24, respectively, of FIG. 4.
  • the two components forming the impeller are modified insofar as each end wall 11, 12 carries one half of the blades, i.e., the end wall 11 carries the blade sections 46 and the end wall 12 carries the blade sections 47 the blade sections 46, 47 being opposed to one another virtually to form single blades, but being separated by narrow slots 48 left between the adjacent edges of these half blades 46, 47.
  • the cylindrical periphery of the impeller is formed by a smooth ring 49 the recesses 50, 51 of which accommodate the outer edges of the walls 11, 12. It will also be seen from FIG. 7 that, in addition to the vanes 46, 47 extending from the impeller periphery to the inlet eye 15 radially. shorterribs 52 which may extend across the width of the impeller .vessel are provided which help to reduce secondary vo-rtices still further.
  • FIG. 10 shows an impeller with forwardly directed nozzles 44, 45 situated in the margins of the end walls 11, 12 corresponding to the example shown in FIGS. 5, 6 and 7.
  • additional circular rings 63, 64 extending in the radial direction outside the nozzles 44, 45 are provided.
  • one or more further outlet diffusers may be usefully provided in the casing. This is shown in FIG. 11 where five diffusers are arranged in the ring part 34a of the pump casing surrounding the impeller 33a.
  • the liquid is discharged by the diff-users 35 into a space 36 which, by way of example, is formed as a volu-te 37 carrying the outlet 38.
  • FIG. 12 shows, on a larger scale, a diffuser 39 provided with a conical insert 40 the inner end 41 of which projects to a certain extent into the space 31 but so that the diffuser entry 42 is mostly located in the region of the undisturbed flow.
  • This will result in an improved ram effect at low flow rates and consequently in increased static delivery pressure.
  • an undisturbed entry flow to the diffuser throat and a correspondingly improved conversion of kinetic energy into static pressure can be expected which, according to experience, is not so well obtainable with a simple tangential bore 32a and 35a as shown in FIG. 4 and FIG. 11, respectively.
  • the projecting section 41 of the insert 40 itself has a reasonably favourable external shape so as not unduly to disturb the passing liquid flow. However, when applying high peripheral velocities it may be advisable to provide an additional section 43 of an improved streamlined shape for the projecting part 41.
  • the circular section 53 of the pump impeller has a reduced diameter relative to the internal size of the pump casing 19.
  • the nozzles are represented by two streamlined members 54, 55 projecting from the periphery of the circular section 53 in the radial direction. They are provided with internal channels 56, 57, respectively, which have a relatively wide cross sectional extent in the circumferential direction, and they communicate with the actual outlet .nozzles 58, 59, respectively, which are so located that the jets will have a tangential direction as required.
  • the two streamlined nozzles cause a considerably lower skin friction so that satisfactory efficiencies can still be obtained in spite of small flow rates.
  • a centrifugal impeller pump comprising a casing and an impeller therein in the form of a circular vessel having a peripheral wall and side walls, an inlet eye in a said side wall, and internal fluid rotating means, said vessel being constructed of separate parts and being disposed in the casing so as to form around the vessel an annular chamber, said chamber having smooth surfaces and a discharge outlet means; at least one of said side walls having in the region of its periphery at least one tangentially-discharging exit nozzle opening into the said smooth surfaced chamber for producing a non-turbulent flow in said chamber to said outlet means.
  • a centrifugal impeller pump according to claim 1 said tangentially-discharging nozzle having a rounded junction with the interior surface of said side wall of said vessel where an acute angle would normally be formed by the tangential location of the nozzle.
  • a centrifugal impeller pump having a plurality of said tangentially delivering nozzles in each said side wall near to the said peripheral wall, each said nozzle merging into a discharge end of restricted cross section situate in the outer face of the relevant said side wall and having a relatively large inlet opening in the inner face of the said wall.
  • a centrifugal impeller pump having a plurality of said tangentially delivery nozzles in each said side wall near to the said peripheral wall, each said nozzle opening at the inner face of said side wall and merging into a restricted discharge end opening beyond the outer face of the relevant side wall.
  • a centrifugal impeller pump having a plurality of said nozzles each converging outwardly in at least one of said side Walls of the vessel, said side wall having an annular outer channel into which the said nozzles discharge tangentially.
  • said discharge output means comprising a diffuser member the inner end of which projects into the said annular chamber near to the outer periphery thereof and provides a restricted inlet extending transversely across part of the width of said chamber to provide a ram effect at low flow rates and consequently an increased delivery pressure.
  • said discharge outlet means comprising a dilfuser member the inner end of which projects into the said annular chamber with its inlet and providing a restricted outlet extending transversely across part of the width of said chamber near to the outer periphery thereof and comprising a curved fillet interposed between the said inner projecting end of the said member and the outer periphery. of the said chamber to fill the angle the projecting end of the diffuser member would otherwise make with the said outer periphery and to enable the liquid material not entering the diffuser member to have a smooth flow round the said outer periphery.
  • a centrifugal impeller pump with an axial inlet comprising a casing and an impeller therein in the form of a circular vessel with an axial inlet eye, a peripheral wall and side walls and internal fluidrotating means carried by and strengthening said side walls; the said vessel being disposed in the said casing so as to form around the vessel an annular chamber, said chamber having smooth surfaces and outlet means, the peripheral region of the vessel being provided with discharging nozzles each projecting outwards beyond the outer periphery of said vessel into the said annular chamber and being shaped first with a radial passage opening into the vessel and then with a continuing tangential exit passage opening into the said chamber.
  • a centrifugal pump according to claim 8 in which the said outwardly projecting nozzles are of streamlined cross section with nose leading in the direction of rotation and with said continuing tangential exit passage in the tapering tail end of said nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US381677A 1963-07-19 1964-07-10 Centrifugal pumps Expired - Lifetime US3244109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0072749 1963-07-19

Publications (1)

Publication Number Publication Date
US3244109A true US3244109A (en) 1966-04-05

Family

ID=6977575

Family Applications (1)

Application Number Title Priority Date Filing Date
US381677A Expired - Lifetime US3244109A (en) 1963-07-19 1964-07-10 Centrifugal pumps

Country Status (6)

Country Link
US (1) US3244109A (de)
BE (1) BE650777A (de)
CH (2) CH438035A (de)
DE (1) DE1453723A1 (de)
GB (2) GB1081163A (de)
NL (1) NL6408151A (de)

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378935A (en) * 1965-09-23 1968-04-23 Charvo Sa Apparatus for drying hides, skins and similar sheetlike articles
US3692426A (en) * 1970-03-31 1972-09-19 Weir Pumps Ltd Fluid machines
US3795461A (en) * 1972-08-10 1974-03-05 M Eskeli Compressor with cooling
US4531886A (en) * 1983-04-04 1985-07-30 Casimir Rogo Drum pump
US4629394A (en) * 1983-07-25 1986-12-16 Chandler Evans Inc Centrifugal pump having low flow diffuser
US5184937A (en) * 1989-07-05 1993-02-09 Ebara Corporation Centrifugal pump casing
US5257910A (en) * 1988-12-23 1993-11-02 Ksb Aktiengesellschaft Centrifugal pump impeller with a low specific speed of rotation
US6303074B1 (en) 1999-05-14 2001-10-16 Paul V. Cooper Mixed flow rotor for molten metal pumping device
US6345964B1 (en) 1996-12-03 2002-02-12 Paul V. Cooper Molten metal pump with metal-transfer conduit molten metal pump
US6431828B1 (en) * 2000-04-05 2002-08-13 Envirotech Pumpsystems, Inc. Non-planar rotor cover for a centrifugal pump
GB2378732A (en) * 2001-05-22 2003-02-19 Fans & Blowers Ltd Impeller for a fan
US6689310B1 (en) 2000-05-12 2004-02-10 Paul V. Cooper Molten metal degassing device and impellers therefor
US20040076533A1 (en) * 2002-07-12 2004-04-22 Cooper Paul V. Couplings for molten metal devices
US20040115079A1 (en) * 2002-07-12 2004-06-17 Cooper Paul V. Protective coatings for molten metal devices
US20040262825A1 (en) * 2000-08-28 2004-12-30 Cooper Paul V. Scrap melter and impeller therefore
US20050013713A1 (en) * 2003-07-14 2005-01-20 Cooper Paul V. Pump with rotating inlet
US20050013715A1 (en) * 2003-07-14 2005-01-20 Cooper Paul V. System for releasing gas into molten metal
US20060245921A1 (en) * 2005-04-28 2006-11-02 Morando Jorge A High flow/dual inducer/high efficiency impeller for liquid applications including molten metal
US7470392B2 (en) 2003-07-14 2008-12-30 Cooper Paul V Molten metal pump components
WO2011014988A1 (zh) * 2009-08-04 2011-02-10 Yu Chun Kwan 一种离心压力泵及使用该离心压力泵的能量转换设备
US7906068B2 (en) 2003-07-14 2011-03-15 Cooper Paul V Support post system for molten metal pump
WO2012121609A1 (en) * 2011-03-09 2012-09-13 Agr Subsea As Rotodynamic pump for variable output flow
US8337746B2 (en) 2007-06-21 2012-12-25 Cooper Paul V Transferring molten metal from one structure to another
US8361379B2 (en) 2002-07-12 2013-01-29 Cooper Paul V Gas transfer foot
US8366993B2 (en) 2007-06-21 2013-02-05 Cooper Paul V System and method for degassing molten metal
US8444911B2 (en) 2009-08-07 2013-05-21 Paul V. Cooper Shaft and post tensioning device
US8449814B2 (en) 2009-08-07 2013-05-28 Paul V. Cooper Systems and methods for melting scrap metal
US8524146B2 (en) 2009-08-07 2013-09-03 Paul V. Cooper Rotary degassers and components therefor
US8535603B2 (en) 2009-08-07 2013-09-17 Paul V. Cooper Rotary degasser and rotor therefor
US8613884B2 (en) 2007-06-21 2013-12-24 Paul V. Cooper Launder transfer insert and system
US8714914B2 (en) 2009-09-08 2014-05-06 Paul V. Cooper Molten metal pump filter
US9011761B2 (en) 2013-03-14 2015-04-21 Paul V. Cooper Ladle with transfer conduit
US9108244B2 (en) 2009-09-09 2015-08-18 Paul V. Cooper Immersion heater for molten metal
US9156087B2 (en) 2007-06-21 2015-10-13 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
US9205490B2 (en) 2007-06-21 2015-12-08 Molten Metal Equipment Innovations, Llc Transfer well system and method for making same
US9410744B2 (en) 2010-05-12 2016-08-09 Molten Metal Equipment Innovations, Llc Vessel transfer insert and system
US9409232B2 (en) 2007-06-21 2016-08-09 Molten Metal Equipment Innovations, Llc Molten metal transfer vessel and method of construction
US9643247B2 (en) 2007-06-21 2017-05-09 Molten Metal Equipment Innovations, Llc Molten metal transfer and degassing system
US9695826B1 (en) * 2012-06-28 2017-07-04 James Harmon Pitot tube pump and related methods
US9903383B2 (en) 2013-03-13 2018-02-27 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened top
US10052688B2 (en) 2013-03-15 2018-08-21 Molten Metal Equipment Innovations, Llc Transfer pump launder system
US10138892B2 (en) 2014-07-02 2018-11-27 Molten Metal Equipment Innovations, Llc Rotor and rotor shaft for molten metal
US20190060564A1 (en) * 2017-08-02 2019-02-28 Angiodynamics, Inc. Device and method for infusing and aspirating fluid
US10267314B2 (en) 2016-01-13 2019-04-23 Molten Metal Equipment Innovations, Llc Tensioned support shaft and other molten metal devices
US10428821B2 (en) 2009-08-07 2019-10-01 Molten Metal Equipment Innovations, Llc Quick submergence molten metal pump
US10947980B2 (en) 2015-02-02 2021-03-16 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened blade tips
US11149747B2 (en) 2017-11-17 2021-10-19 Molten Metal Equipment Innovations, Llc Tensioned support post and other molten metal devices
US11358217B2 (en) 2019-05-17 2022-06-14 Molten Metal Equipment Innovations, Llc Method for melting solid metal
US11805765B1 (en) 2023-02-07 2023-11-07 Bradley Toschlog Centrifugal pump system
US11873845B2 (en) 2021-05-28 2024-01-16 Molten Metal Equipment Innovations, Llc Molten metal transfer device
US12146508B2 (en) 2022-05-26 2024-11-19 Molten Metal Equipment Innovations, Llc Axial pump and riser
US12439899B2 (en) 2023-02-07 2025-10-14 Bradley Toschlog Centrifugal pump system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556364A (en) * 1981-07-23 1985-12-03 D. Wickham And Company Limited Centrifugal pumps
DE3943273C2 (de) * 1989-12-29 1996-07-18 Klaus Union Armaturen Horizontal angeordnete Kreiselpumpe mit Spaltrohrmagnetkupplung
DE4310467A1 (de) * 1993-03-31 1994-10-06 Klein Schanzlin & Becker Ag Topfgehäusepumpe
US20110243732A1 (en) * 2010-03-30 2011-10-06 Yung-Sho Yang Pump impeller

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US464716A (en) * 1891-12-08 Apparatus for discharging water
US704360A (en) * 1901-07-03 1902-07-08 Natural Power Co Blower and compressor.
US1083739A (en) * 1913-01-29 1914-01-06 Hans Guyer Centrifugal pump and compressor or the like.
US1166257A (en) * 1913-11-01 1915-12-28 Edmund Scott Gustave Rees Centrifugal pump, turbine, condenser, and the like.
US1268630A (en) * 1917-05-31 1918-06-04 Joseph P Ruth Jr Aerating device.
US1914919A (en) * 1931-10-30 1933-06-20 Allis Chalmers Mfg Co Centrifugal pump
US2144417A (en) * 1937-01-11 1939-01-17 Claude B Schneible Sludge pump
US2222954A (en) * 1938-03-15 1940-11-26 Ogrinc John Pump
GB579770A (en) * 1943-10-04 1946-08-15 Lionel Haworth Improvements in or relating to centrifugal compressors, pumps and superchargers
DE801248C (de) * 1949-09-14 1950-12-28 Henschel & Sohn G M B H Einrichtung zur Verringerung der Fluessigkeitsreibung bei umlaufenden Stroemungsmaschinen, insbesondere Kreiselpumpen
US2622858A (en) * 1948-04-22 1952-12-23 Infilco Inc Apparatus for submerged gas diffusion
US2825285A (en) * 1953-12-28 1958-03-04 Belton A Copp Centrifugal pump with discharge manifold
US2990107A (en) * 1956-11-30 1961-06-27 Ray C Edwards Compressor
US2999628A (en) * 1957-08-26 1961-09-12 Joseph S Crombie Low pressure compressor

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US464716A (en) * 1891-12-08 Apparatus for discharging water
US704360A (en) * 1901-07-03 1902-07-08 Natural Power Co Blower and compressor.
US1083739A (en) * 1913-01-29 1914-01-06 Hans Guyer Centrifugal pump and compressor or the like.
US1166257A (en) * 1913-11-01 1915-12-28 Edmund Scott Gustave Rees Centrifugal pump, turbine, condenser, and the like.
US1268630A (en) * 1917-05-31 1918-06-04 Joseph P Ruth Jr Aerating device.
US1914919A (en) * 1931-10-30 1933-06-20 Allis Chalmers Mfg Co Centrifugal pump
US2144417A (en) * 1937-01-11 1939-01-17 Claude B Schneible Sludge pump
US2222954A (en) * 1938-03-15 1940-11-26 Ogrinc John Pump
GB579770A (en) * 1943-10-04 1946-08-15 Lionel Haworth Improvements in or relating to centrifugal compressors, pumps and superchargers
US2622858A (en) * 1948-04-22 1952-12-23 Infilco Inc Apparatus for submerged gas diffusion
DE801248C (de) * 1949-09-14 1950-12-28 Henschel & Sohn G M B H Einrichtung zur Verringerung der Fluessigkeitsreibung bei umlaufenden Stroemungsmaschinen, insbesondere Kreiselpumpen
US2825285A (en) * 1953-12-28 1958-03-04 Belton A Copp Centrifugal pump with discharge manifold
US2990107A (en) * 1956-11-30 1961-06-27 Ray C Edwards Compressor
US2999628A (en) * 1957-08-26 1961-09-12 Joseph S Crombie Low pressure compressor

Cited By (139)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378935A (en) * 1965-09-23 1968-04-23 Charvo Sa Apparatus for drying hides, skins and similar sheetlike articles
US3692426A (en) * 1970-03-31 1972-09-19 Weir Pumps Ltd Fluid machines
US3795461A (en) * 1972-08-10 1974-03-05 M Eskeli Compressor with cooling
US4531886A (en) * 1983-04-04 1985-07-30 Casimir Rogo Drum pump
US4629394A (en) * 1983-07-25 1986-12-16 Chandler Evans Inc Centrifugal pump having low flow diffuser
US5257910A (en) * 1988-12-23 1993-11-02 Ksb Aktiengesellschaft Centrifugal pump impeller with a low specific speed of rotation
US5184937A (en) * 1989-07-05 1993-02-09 Ebara Corporation Centrifugal pump casing
US6345964B1 (en) 1996-12-03 2002-02-12 Paul V. Cooper Molten metal pump with metal-transfer conduit molten metal pump
US6303074B1 (en) 1999-05-14 2001-10-16 Paul V. Cooper Mixed flow rotor for molten metal pumping device
US6431828B1 (en) * 2000-04-05 2002-08-13 Envirotech Pumpsystems, Inc. Non-planar rotor cover for a centrifugal pump
US6689310B1 (en) 2000-05-12 2004-02-10 Paul V. Cooper Molten metal degassing device and impellers therefor
US20040262825A1 (en) * 2000-08-28 2004-12-30 Cooper Paul V. Scrap melter and impeller therefore
US20080230966A1 (en) * 2000-08-28 2008-09-25 Cooper Paul V Scrap melter and impeller therefore
GB2378732A (en) * 2001-05-22 2003-02-19 Fans & Blowers Ltd Impeller for a fan
GB2378732B (en) * 2001-05-22 2004-08-18 Fans & Blowers Ltd Fan
US8178037B2 (en) 2002-07-12 2012-05-15 Cooper Paul V System for releasing gas into molten metal
US7731891B2 (en) 2002-07-12 2010-06-08 Cooper Paul V Couplings for molten metal devices
US8440135B2 (en) 2002-07-12 2013-05-14 Paul V. Cooper System for releasing gas into molten metal
US8409495B2 (en) 2002-07-12 2013-04-02 Paul V. Cooper Rotor with inlet perimeters
US8361379B2 (en) 2002-07-12 2013-01-29 Cooper Paul V Gas transfer foot
US8529828B2 (en) 2002-07-12 2013-09-10 Paul V. Cooper Molten metal pump components
US20080211147A1 (en) * 2002-07-12 2008-09-04 Cooper Paul V System for releasing gas into molten metal
US20040115079A1 (en) * 2002-07-12 2004-06-17 Cooper Paul V. Protective coatings for molten metal devices
US9034244B2 (en) 2002-07-12 2015-05-19 Paul V. Cooper Gas-transfer foot
US7507367B2 (en) 2002-07-12 2009-03-24 Cooper Paul V Protective coatings for molten metal devices
US20090140013A1 (en) * 2002-07-12 2009-06-04 Cooper Paul V Protective coatings for molten metal devices
US9435343B2 (en) 2002-07-12 2016-09-06 Molten Meal Equipment Innovations, LLC Gas-transfer foot
US20040076533A1 (en) * 2002-07-12 2004-04-22 Cooper Paul V. Couplings for molten metal devices
US8110141B2 (en) 2002-07-12 2012-02-07 Cooper Paul V Pump with rotating inlet
US8075837B2 (en) 2003-07-14 2011-12-13 Cooper Paul V Pump with rotating inlet
US7906068B2 (en) 2003-07-14 2011-03-15 Cooper Paul V Support post system for molten metal pump
US8475708B2 (en) 2003-07-14 2013-07-02 Paul V. Cooper Support post clamps for molten metal pumps
US20050013713A1 (en) * 2003-07-14 2005-01-20 Cooper Paul V. Pump with rotating inlet
US7470392B2 (en) 2003-07-14 2008-12-30 Cooper Paul V Molten metal pump components
US7402276B2 (en) 2003-07-14 2008-07-22 Cooper Paul V Pump with rotating inlet
US8501084B2 (en) 2003-07-14 2013-08-06 Paul V. Cooper Support posts for molten metal pumps
US20050013715A1 (en) * 2003-07-14 2005-01-20 Cooper Paul V. System for releasing gas into molten metal
US7326028B2 (en) 2005-04-28 2008-02-05 Morando Jorge A High flow/dual inducer/high efficiency impeller for liquid applications including molten metal
US20060245921A1 (en) * 2005-04-28 2006-11-02 Morando Jorge A High flow/dual inducer/high efficiency impeller for liquid applications including molten metal
US11185916B2 (en) 2007-06-21 2021-11-30 Molten Metal Equipment Innovations, Llc Molten metal transfer vessel with pump
US9156087B2 (en) 2007-06-21 2015-10-13 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
US11167345B2 (en) 2007-06-21 2021-11-09 Molten Metal Equipment Innovations, Llc Transfer system with dual-flow rotor
US8366993B2 (en) 2007-06-21 2013-02-05 Cooper Paul V System and method for degassing molten metal
US11103920B2 (en) 2007-06-21 2021-08-31 Molten Metal Equipment Innovations, Llc Transfer structure with molten metal pump support
US8337746B2 (en) 2007-06-21 2012-12-25 Cooper Paul V Transferring molten metal from one structure to another
US11020798B2 (en) 2007-06-21 2021-06-01 Molten Metal Equipment Innovations, Llc Method of transferring molten metal
US8613884B2 (en) 2007-06-21 2013-12-24 Paul V. Cooper Launder transfer insert and system
US10562097B2 (en) 2007-06-21 2020-02-18 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
US8753563B2 (en) 2007-06-21 2014-06-17 Paul V. Cooper System and method for degassing molten metal
US10458708B2 (en) 2007-06-21 2019-10-29 Molten Metal Equipment Innovations, Llc Transferring molten metal from one structure to another
US9017597B2 (en) 2007-06-21 2015-04-28 Paul V. Cooper Transferring molten metal using non-gravity assist launder
US9581388B2 (en) 2007-06-21 2017-02-28 Molten Metal Equipment Innovations, Llc Vessel transfer insert and system
US10352620B2 (en) 2007-06-21 2019-07-16 Molten Metal Equipment Innovations, Llc Transferring molten metal from one structure to another
US10345045B2 (en) 2007-06-21 2019-07-09 Molten Metal Equipment Innovations, Llc Vessel transfer insert and system
US11130173B2 (en) 2007-06-21 2021-09-28 Molten Metal Equipment Innovations, LLC. Transfer vessel with dividing wall
US9205490B2 (en) 2007-06-21 2015-12-08 Molten Metal Equipment Innovations, Llc Transfer well system and method for making same
US10274256B2 (en) 2007-06-21 2019-04-30 Molten Metal Equipment Innovations, Llc Vessel transfer systems and devices
US10195664B2 (en) 2007-06-21 2019-02-05 Molten Metal Equipment Innovations, Llc Multi-stage impeller for molten metal
US9383140B2 (en) 2007-06-21 2016-07-05 Molten Metal Equipment Innovations, Llc Transferring molten metal from one structure to another
US10072891B2 (en) 2007-06-21 2018-09-11 Molten Metal Equipment Innovations, Llc Transferring molten metal using non-gravity assist launder
US9982945B2 (en) 2007-06-21 2018-05-29 Molten Metal Equipment Innovations, Llc Molten metal transfer vessel and method of construction
US9409232B2 (en) 2007-06-21 2016-08-09 Molten Metal Equipment Innovations, Llc Molten metal transfer vessel and method of construction
US9925587B2 (en) 2007-06-21 2018-03-27 Molten Metal Equipment Innovations, Llc Method of transferring molten metal from a vessel
US11759854B2 (en) 2007-06-21 2023-09-19 Molten Metal Equipment Innovations, Llc Molten metal transfer structure and method
US9909808B2 (en) 2007-06-21 2018-03-06 Molten Metal Equipment Innovations, Llc System and method for degassing molten metal
US9862026B2 (en) 2007-06-21 2018-01-09 Molten Metal Equipment Innovations, Llc Method of forming transfer well
US9855600B2 (en) 2007-06-21 2018-01-02 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
US9566645B2 (en) 2007-06-21 2017-02-14 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
US9643247B2 (en) 2007-06-21 2017-05-09 Molten Metal Equipment Innovations, Llc Molten metal transfer and degassing system
WO2011014988A1 (zh) * 2009-08-04 2011-02-10 Yu Chun Kwan 一种离心压力泵及使用该离心压力泵的能量转换设备
US9506129B2 (en) 2009-08-07 2016-11-29 Molten Metal Equipment Innovations, Llc Rotary degasser and rotor therefor
US9422942B2 (en) 2009-08-07 2016-08-23 Molten Metal Equipment Innovations, Llc Tension device with internal passage
US8444911B2 (en) 2009-08-07 2013-05-21 Paul V. Cooper Shaft and post tensioning device
US9657578B2 (en) 2009-08-07 2017-05-23 Molten Metal Equipment Innovations, Llc Rotary degassers and components therefor
US8449814B2 (en) 2009-08-07 2013-05-28 Paul V. Cooper Systems and methods for melting scrap metal
US8524146B2 (en) 2009-08-07 2013-09-03 Paul V. Cooper Rotary degassers and components therefor
US9470239B2 (en) 2009-08-07 2016-10-18 Molten Metal Equipment Innovations, Llc Threaded tensioning device
US8535603B2 (en) 2009-08-07 2013-09-17 Paul V. Cooper Rotary degasser and rotor therefor
US9464636B2 (en) 2009-08-07 2016-10-11 Molten Metal Equipment Innovations, Llc Tension device graphite component used in molten metal
US9328615B2 (en) 2009-08-07 2016-05-03 Molten Metal Equipment Innovations, Llc Rotary degassers and components therefor
US12163536B2 (en) 2009-08-07 2024-12-10 Molten Metal Equipment Innovations, Llc Quick submergence molten metal pump
US10570745B2 (en) 2009-08-07 2020-02-25 Molten Metal Equipment Innovations, Llc Rotary degassers and components therefor
US9382599B2 (en) 2009-08-07 2016-07-05 Molten Metal Equipment Innovations, Llc Rotary degasser and rotor therefor
US9377028B2 (en) 2009-08-07 2016-06-28 Molten Metal Equipment Innovations, Llc Tensioning device extending beyond component
US10428821B2 (en) 2009-08-07 2019-10-01 Molten Metal Equipment Innovations, Llc Quick submergence molten metal pump
US9080577B2 (en) 2009-08-07 2015-07-14 Paul V. Cooper Shaft and post tensioning device
US8714914B2 (en) 2009-09-08 2014-05-06 Paul V. Cooper Molten metal pump filter
US10309725B2 (en) 2009-09-09 2019-06-04 Molten Metal Equipment Innovations, Llc Immersion heater for molten metal
US9108244B2 (en) 2009-09-09 2015-08-18 Paul V. Cooper Immersion heater for molten metal
US9410744B2 (en) 2010-05-12 2016-08-09 Molten Metal Equipment Innovations, Llc Vessel transfer insert and system
US9482469B2 (en) 2010-05-12 2016-11-01 Molten Metal Equipment Innovations, Llc Vessel transfer insert and system
US9534601B2 (en) 2011-03-09 2017-01-03 Enhanced Drilling As Pump
WO2012121609A1 (en) * 2011-03-09 2012-09-13 Agr Subsea As Rotodynamic pump for variable output flow
NO332696B1 (no) * 2011-03-09 2012-12-10 Agr Subsea As Rotodynamisk pumpe for vekslende leveringsmengde
US9695826B1 (en) * 2012-06-28 2017-07-04 James Harmon Pitot tube pump and related methods
US11391293B2 (en) 2013-03-13 2022-07-19 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened top
US9903383B2 (en) 2013-03-13 2018-02-27 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened top
US10641279B2 (en) 2013-03-13 2020-05-05 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened tip
US10302361B2 (en) 2013-03-14 2019-05-28 Molten Metal Equipment Innovations, Llc Transfer vessel for molten metal pumping device
US10126059B2 (en) 2013-03-14 2018-11-13 Molten Metal Equipment Innovations, Llc Controlled molten metal flow from transfer vessel
US9011761B2 (en) 2013-03-14 2015-04-21 Paul V. Cooper Ladle with transfer conduit
US10126058B2 (en) 2013-03-14 2018-11-13 Molten Metal Equipment Innovations, Llc Molten metal transferring vessel
US9587883B2 (en) 2013-03-14 2017-03-07 Molten Metal Equipment Innovations, Llc Ladle with transfer conduit
US10052688B2 (en) 2013-03-15 2018-08-21 Molten Metal Equipment Innovations, Llc Transfer pump launder system
US10322451B2 (en) 2013-03-15 2019-06-18 Molten Metal Equipment Innovations, Llc Transfer pump launder system
US10307821B2 (en) 2013-03-15 2019-06-04 Molten Metal Equipment Innovations, Llc Transfer pump launder system
US11939994B2 (en) 2014-07-02 2024-03-26 Molten Metal Equipment Innovations, Llc Rotor and rotor shaft for molten metal
US10465688B2 (en) 2014-07-02 2019-11-05 Molten Metal Equipment Innovations, Llc Coupling and rotor shaft for molten metal devices
US10138892B2 (en) 2014-07-02 2018-11-27 Molten Metal Equipment Innovations, Llc Rotor and rotor shaft for molten metal
US11286939B2 (en) 2014-07-02 2022-03-29 Molten Metal Equipment Innovations, Llc Rotor and rotor shaft for molten metal
US12560169B2 (en) 2014-07-02 2026-02-24 Molten Metal Equipment Innovations, Llc Coupling and rotor shaft for molten metal devices
US10947980B2 (en) 2015-02-02 2021-03-16 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened blade tips
US11933324B2 (en) 2015-02-02 2024-03-19 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened blade tips
US10267314B2 (en) 2016-01-13 2019-04-23 Molten Metal Equipment Innovations, Llc Tensioned support shaft and other molten metal devices
US11098720B2 (en) 2016-01-13 2021-08-24 Molten Metal Equipment Innovations, Llc Tensioned rotor shaft for molten metal
US10641270B2 (en) 2016-01-13 2020-05-05 Molten Metal Equipment Innovations, Llc Tensioned support shaft and other molten metal devices
US11098719B2 (en) 2016-01-13 2021-08-24 Molten Metal Equipment Innovations, Llc Tensioned support shaft and other molten metal devices
US11519414B2 (en) 2016-01-13 2022-12-06 Molten Metal Equipment Innovations, Llc Tensioned rotor shaft for molten metal
US10912885B2 (en) * 2017-08-02 2021-02-09 Angiodynamics, Inc. Device and method for infusing and aspirating fluid
US20190060564A1 (en) * 2017-08-02 2019-02-28 Angiodynamics, Inc. Device and method for infusing and aspirating fluid
US11149747B2 (en) 2017-11-17 2021-10-19 Molten Metal Equipment Innovations, Llc Tensioned support post and other molten metal devices
US12385501B2 (en) 2017-11-17 2025-08-12 Molten Metal Equipment Innovations, Llc Tensioned support post and other molten metal devices
US12031550B2 (en) 2017-11-17 2024-07-09 Molten Metal Equipment Innovations, Llc Tensioned support post and other molten metal devices
US11976672B2 (en) 2017-11-17 2024-05-07 Molten Metal Equipment Innovations, Llc Tensioned support post and other molten metal devices
US11931802B2 (en) 2019-05-17 2024-03-19 Molten Metal Equipment Innovations, Llc Molten metal controlled flow launder
US11850657B2 (en) 2019-05-17 2023-12-26 Molten Metal Equipment Innovations, Llc System for melting solid metal
US11358217B2 (en) 2019-05-17 2022-06-14 Molten Metal Equipment Innovations, Llc Method for melting solid metal
US11931803B2 (en) 2019-05-17 2024-03-19 Molten Metal Equipment Innovations, Llc Molten metal transfer system and method
US11471938B2 (en) 2019-05-17 2022-10-18 Molten Metal Equipment Innovations, Llc Smart molten metal pump
US11858037B2 (en) 2019-05-17 2024-01-02 Molten Metal Equipment Innovations, Llc Smart molten metal pump
US11858036B2 (en) 2019-05-17 2024-01-02 Molten Metal Equipment Innovations, Llc System and method to feed mold with molten metal
US11759853B2 (en) 2019-05-17 2023-09-19 Molten Metal Equipment Innovations, Llc Melting metal on a raised surface
US12263522B2 (en) 2019-05-17 2025-04-01 Molten Metal Equipment Innovations, Llc Smart molten metal pump
US11358216B2 (en) 2019-05-17 2022-06-14 Molten Metal Equipment Innovations, Llc System for melting solid metal
US12228150B2 (en) 2021-05-28 2025-02-18 Molten Metal Equipment Innovations, Llc Molten metal transfer device
US11873845B2 (en) 2021-05-28 2024-01-16 Molten Metal Equipment Innovations, Llc Molten metal transfer device
US12146508B2 (en) 2022-05-26 2024-11-19 Molten Metal Equipment Innovations, Llc Axial pump and riser
US11805765B1 (en) 2023-02-07 2023-11-07 Bradley Toschlog Centrifugal pump system
US12439899B2 (en) 2023-02-07 2025-10-14 Bradley Toschlog Centrifugal pump system

Also Published As

Publication number Publication date
GB1081164A (en) 1967-08-31
NL6408151A (de) 1965-01-20
CH439978A (de) 1967-07-15
DE1453723A1 (de) 1969-07-31
BE650777A (de) 1965-01-20
CH438035A (de) 1967-06-15
GB1081163A (en) 1967-08-31

Similar Documents

Publication Publication Date Title
US3244109A (en) Centrifugal pumps
US2349731A (en) Centrifugal pump
US3130679A (en) Nonclogging centrifugal pump
US3217655A (en) Centrifugal pump
US2087834A (en) Fluid impeller and turbine
US4334821A (en) Regenerative rotodynamic machines
US2658455A (en) Impeller with center intake
GB1006365A (en) Improvements in or relating to hydraulic pumps and reversible pump turbines
US2553066A (en) Self-priming centrifugal pump
US3162135A (en) Centrifugal pumps
GB1085418A (en) Centrifugal pumps
CN109257934B (zh) 用于泥浆泵的旋转部件
US2466812A (en) Self-priming centrifugal pump
US3307776A (en) Fluid-working machines
US4439200A (en) Single stage high pressure centrifugal slurry pump
US3809491A (en) Centrifugal pump structure
US1334461A (en) Centrifugal pump
US4652207A (en) Vaneless centrifugal pump
US3203354A (en) Pump
US3678689A (en) Submerged multistage pump usable as propulsion unit
GB1195993A (en) Centrifugal Pumps.
US5042256A (en) Turbine shaft fuel pump
US3013501A (en) Centrifugal impeller
US3414188A (en) Fan having hollow blades
US4643635A (en) Vapor core centrifugal pump having main and low flow impellers