US2663263A - Rotary pump - Google Patents

Rotary pump Download PDF

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Publication number
US2663263A
US2663263A US111252A US11125249A US2663263A US 2663263 A US2663263 A US 2663263A US 111252 A US111252 A US 111252A US 11125249 A US11125249 A US 11125249A US 2663263 A US2663263 A US 2663263A
Authority
US
United States
Prior art keywords
casing
shaft
pump
impeller
inlet
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
US111252A
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English (en)
Inventor
Mayus Eugene
See Walter George
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.)
SUBMERGED COMB Co OF AMER
SUBMERGED COMBUSTION Co OF AMERICA Inc
Original Assignee
SUBMERGED COMB Co OF AMER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to LU30267D priority Critical patent/LU30267A1/xx
Application filed by SUBMERGED COMB Co OF AMER filed Critical SUBMERGED COMB Co OF AMER
Priority to US111252A priority patent/US2663263A/en
Priority to DEM5346A priority patent/DE830161C/de
Priority to FR1023511D priority patent/FR1023511A/fr
Priority to BE497615D priority patent/BE497615A/xx
Application granted granted Critical
Publication of US2663263A publication Critical patent/US2663263A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/40—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C2/08 or F04C2/22 and having a hinged member
    • F04C2/44—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C2/08 or F04C2/22 and having a hinged member with vanes hinged to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/40—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C2/08 or F04C2/22 and having a hinged member

Definitions

  • This invention relates to a rotary pump and more particularly to a self-priming rotary pump having a plurality of pumping units Within one housing.
  • An object of the present invention is to provide a rotary pump capable of handling large quantities of fluids in an exceptionally efficient manner.
  • Another object is to provide a rotary pump which will be self-priming and positive acting.
  • a further object is to provide a rotary pump which will be substantially resistant to the corrosive action of fluids and slurries.
  • Still another object is to provide a rotary pump employing a novel flexible impeller vane construction and a curved cam for flexing the vanes within the pump casing.
  • rA still further object is to provide a novel rotary pump construction in which a pumping action is effected in a plurality of placesrwithin a single pump housing.
  • a rotary pump having a novel impeller vaction and a plurality of pumping actions Within one housing whereby an exceptionally efficient conveyance of ⁇ afluid is effected.
  • Flexible corrosive resistant impeller blades are flexed by passing them over arcuate cam surfaces within thepump casing. Each cam surface is reversely curved inwardly intermediate of and spaced from an outlet and its succeeding inlet so as to squeeze the flexible varies successively toward the central axis of the pump.
  • a resultant suction is produced at the inlet openings and a pressure is produced at the discharge or outlet openings thereby setting up a pumping action.
  • Y Figure 1 is an axial cross sectional view of the assembled pump
  • Figure 2 is a top view'of the complete pump assembly showing the drive pulley and support bearing in plan and the pumpin section along the lines 22 of Figure'l;
  • Figure 3 is an enlarged partial section of the impeller and cam of Figure 1;
  • Figure 4 is an enlarged sectional view of the pump housing illustrating the grid construction at the inlets and outlets;
  • Figure 5 is a side planview of the pump showing thev manifold flanges
  • Figure 6 is a top plan view of the pump housing and the manifold assembly:A
  • Figure 7 is an end view of the pump housing of Figure 6;
  • ⁇ Figure 8 is aside view of the pump assembly represented in Figures 6 and 7;
  • Figure 9 is a perspective of the upper portion of the manifold assembly of Figures 6, 7 and 8;
  • Figure 1.0 is a perspective of the lower portion of the manifold assembly.
  • the pump housing I in Figures 1 and 2 consists of an outer casing 2 and a flange 3 to which an end plate I9 isattached. Integrally cast into the outer'casing 2 are two inlet or suction openings 4 and 5, and two outlet lor discharge openings 6 and 1.
  • the manifolds are connected to supply and discharge lines (not shown) leading to and from the pump.
  • 4'Ihe pump housing is supported on the base I2 by meansof thesupport members I3, i4 and I5. l f
  • the impeller I6 Fitted concentrically within the pump casing 2 is the impeller I6,which isimounted upon the shaft I'I and fastened-thereto by means of projections I8 on the shaft interlocking with complemental wedge shaped recesses on the impeller.
  • the shaft Il entersthe-pump casingthrough a suitable opening-in the end vplate I9 and is enclosed by a packing glandA 20 held in place by the retainer ring. 2
  • the shaft I'I is supported by the bearing ⁇ assembly 22 and is suitably driven through the pulley 23'to which it is secured. It4
  • the impeller le which wmbe describesm ⁇ greater detail hereinafter, is made of a molded nexible material such Vas rubber orV plastic, and preferably of a corrosion resistant resilient material, for example, neoprene rubber.
  • a plurale ity of flexible vanes- 25 are integrally attached to the body portion of the impeller, extending radially from the shaft Il.
  • the volume. of space betweena flexed vane 'and thel preceding vane be comes largerv ythereby reducing the pressure within the space or ,creating av suction.l .Con.
  • Figure 3 is a sectional View ⁇ of;a:,portionjoftne pump casing 2, a portion el thejimpeller jloodyy It and the shaft I1, a number ofY the ilexible vanes 25 and the cam element 26.
  • the flexible Vane 25 is of decreasing crossseotion'ifrom-fthe base where it joins the impeller body I6 .toward the tip.
  • the tip 28 of the vane 25 is, however, considerably enlarged over the shaft portion, being enlarged into a round'or 4oval shapedknob the end of which is adapted .to engage the inside 'of the 'pumpv casing 'during rotation.
  • Thefvvane also can more easily 'assume extreme position shown Lin Figure S'wherein the tipfZ-substantially fills ⁇ Athe space-between the-fcam 1and the impellerbody His Y Y l
  • vIn ⁇ Figure Ltithe grid ⁇ construction 'in the iinle't Theigrid .32*:correspondsitofthe inlet'f'opening 4 plurality. of. :diagonally ⁇ positioned bars-3ft serve'f the suction l YmaIx ⁇ fltiwhich '-disti'libutes fthe l fluid Bthrough a plurality :of .conduits -B'Bl iand 1+i-l f to the proper inlet openings in the pump case ing.
  • the lconduits 36 and 31 are flanged for connection to the inlet conduits 8 and 9 which communicate With the interior of the Dump.
  • fluid being discharged from the ,pump enters 'thefconduits l' 'and
  • the discharged viluid is collected from the conduits 38 and B 1 0' in the; discharge manifold 4i), and is thereafter passed through the flanged opening into the discharge; lineo'f the system.
  • IrL Figures 9' and 110 the suction and discharge manifold assemblies are illustrated in perspective.
  • the flanges .M and 42 of Figure 9 and the flanges 43 and 44 of Figure 10 are adapted for .connecting'to the .corresponding flanges on the pumpcasing.
  • A'It 'is contemplated 'that lpumps 'made according to the present invention may have any desired number ofl pumping units Within asingle casing. For example; two 'units are illustrated and"desrbdherein-jas a prepared embodiment o'f the invention: But any-number-ofunits such yas 3 or 6 may be used merely Iby makingcertain changesinf-the arrangement and'number 'of parts.
  • 'By la ⁇ Vunit is meant ⁇ the :combination of adjacent :inlet land outletv openings in :a ⁇ l'plump casing 4and a-squeezing surface intermediate 'said pair of openings;r ltWillibe-desirable, or" "course, toincrease they number Yof -vanes Von 4the vjimpeller-as the'nuin-ber 'ofParks Ais increased.
  • klt will alsof-be evidentft-hat--a more elaborate manifold assembly Will be required-itc raccommodate more ⁇ than 'two units.
  • the Apump i particularly adaptable U for usefas afproporticning pump when driwenby a -directflcurrent 4electric Vfrnotor; or 'other 'easily adjustable-power ⁇ unit ⁇ With-'a4 rheostat'to change the -driving speed: Maintenance and cleaning 4of the internal partss greatly (simplified because dt" the easey'of access A:to ⁇ the interior through ⁇ the removable --coverplate v r-lfhe jpresent--pump'is especially useful *in handlingfcorrosive Jiluidzssuclr'as - ⁇ chemical "solutions,
  • the linterior 'of the pump has no fbearingswand ihencefthere' ⁇ is no Vdanger of bearing corrosion.
  • the materialsusedin-making the pump may v'be -varied 'Widely Ain order to accommodate any ftype'of corrosive or non-oorros'ive fluid.
  • fin 'the handling yof certain especially corrosive "uids, rit-Would ⁇ he desirablefrto 'use ⁇ lead, ⁇ stainless steel,A or .monel metal for the metallicY parts ofV the pjcimprandfa neoprene :impeller ,and vane assembly.
  • the fluidg' is Aessentially.nonfcorrosive it [may be-def sirable to use cast iron fouine-.pumpcasing and natural rubber. for ⁇ theiinpeller 1.assen/ibly.
  • rotary pump comprising acasinghauins a plurality of inlet and o utletnpenings disposed vtherein," a shaftY mounted4 concentricA to ysaid casing, an impellerinountedonsaitl.shaft and having aplurality ofilexiblevanes extending radially from said shaft, and conveXly-curved'arcuate cam elements ori-theinner circumference or" sa'id casfing and adapted to fleinsta-itlivafnesandfforcessafid vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet.
  • a rotary pump comprising a casing having a plurality of inlet and outlet openings disposed therein, a shaft mounted concentric to said casing, an impeller mounted on said shaft and having a plurality of flexible vanes extended radially from said shaft, a pair of convexly curved arcuate cam elements on the inner circumference of said casing and adapted for flexing and forcing said vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet, and inlet and outlet manifolds connected respectively to said inlets and said outlets.
  • a rotary pump comprising a casing having a plurality of inlet and outlet openings disposed therein, a shaftY mounted concentric to said casing, an impeller mounted on said shaft and having a plurality of iiexible vanes extending radially from said shaft, and convexly curved arcuate cam elements, forming part of the inner circumference of said casing and adapted for flexing and forcing said vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet, said flexible vanes being integrally molded with the body of said impeller and having a recessed area transverse to the axis of rotation of the body at the juncture of the vane with said body.
  • a rotary pump comprising a casing having a plurality of inlet and outlet openings disposed therein, a shaft mounted concentric to said casing, an impeller mounted on said shaft and having a plurality of flexible vanes extending radially from said shaft, and a pair of convexly curved arcuate cam elements forming part of the inner circumference of said casing and adapted for flexing and forcingsaid vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet, said vanes decreasing in cross-section from the base toward the tip but increasing in cross-section at the tip to form a bead thereon.
  • a rotary pump comprising a casing having a plurality of inlet and outlet openings disposed therein, a shaft mounted concentric to said casing, an impeller mounted on said shaft and having a plurality of flexible vanes extended radially from said shaft, and convexly curved arcuate cam elements forming part of the inner circumference of said casing and adapted for flexing and forcing said vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet, said arcuate cam elements being slidably replaceable Within said casing.
  • a rotary pump comprising a casing having a plurality of inlet and outlet openings disposed therein, a shaft mounted concentric to said casing, an impeller mounted on said shaft and having a plurality of exible vanes extended radially from said shaft, and a plurality of arcuate cam elements, forming part of theinner circumference of said casing and adapted for flexing and forcing said vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet, said arcuate cam elements being 6 concavely curved at either end with respect to said shaft and convexly curved at the center.
  • a rotary pump comprising a casing having a plurality of inlet and outlet openings disposed therein, a shaft mounted concentric to said casing, an impeller mounted on said shaft and having a plurality of flexible vanes extended radially from said shaft, and a plurality of convexly curved arcuate cam elements forming part of the inner circumference of said casing and adapted for exing and forcing said vanes inwardly toward said impeller shaft intermediate an outlet and the succeeding inlet, said inlet and outlet openings being covered by grids comprising a plurality of diagonally positioned bars adapted to form a portion of the circumferential inner Wall of said casing.
  • a rotary concentric vane-type, self priming, positive displacement pump for handling corrosive fluids which comprises a casing made of corrosion resisting metal a plurality of openings in said casing arranged in sets consisting of an adjacent inlet and outlet opening, a plurality of replaceable convexly curved arcuate cam elements forming a portion of the inner circumferential surface of said casing, said cams being positioned intermediate tWo sets of openings and spaced therefrom, a pair of end plates adapted to close said casing, a shaft extending through at least one of said plates and having a corrosive resistant molded resilient impeller interlocked thereto concentric With said casing, said impeller having a plurality of exible vanes extending radially from said shaft, said vanes being adapted to be exed by said cam elements inwardly toward said shaft during rotation of said impeller, drive means for rotating said shaft and suction and discharge manifolds connected respectively to said inlets and outlets.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US111252A 1949-08-19 1949-08-19 Rotary pump Expired - Lifetime US2663263A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
LU30267D LU30267A1 (en)) 1949-08-19
US111252A US2663263A (en) 1949-08-19 1949-08-19 Rotary pump
DEM5346A DE830161C (de) 1949-08-19 1950-07-26 Drehkolbenpumpe
FR1023511D FR1023511A (fr) 1949-08-19 1950-08-16 Pompes rotatives
BE497615D BE497615A (en)) 1949-08-19 1950-08-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US111252A US2663263A (en) 1949-08-19 1949-08-19 Rotary pump

Publications (1)

Publication Number Publication Date
US2663263A true US2663263A (en) 1953-12-22

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Application Number Title Priority Date Filing Date
US111252A Expired - Lifetime US2663263A (en) 1949-08-19 1949-08-19 Rotary pump

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US (1) US2663263A (en))
BE (1) BE497615A (en))
DE (1) DE830161C (en))
FR (1) FR1023511A (en))
LU (1) LU30267A1 (en))

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772637A (en) * 1952-03-20 1956-12-04 Jabsco Pump Co Impeller pump
US2789511A (en) * 1953-05-25 1957-04-23 Jabsco Pump Co Flexible vane pump impeller
US2855853A (en) * 1956-03-14 1958-10-14 Jabsco Pump Co Pump with slotted cam
US2856859A (en) * 1955-01-07 1958-10-21 Visioneering Company Inc Pump
US2882077A (en) * 1954-02-01 1959-04-14 Gen Ind Co Molded plastic rotor hub tightening and driving construction
US2902935A (en) * 1957-05-24 1959-09-08 Dinnison Arthur Dean Pump assembly having plurality of individual pump units
US3001480A (en) * 1959-06-12 1961-09-26 West Bend Aluminum Co Rotary pump
US3054355A (en) * 1961-04-25 1962-09-18 Lord Mfg Co Pump
US3185385A (en) * 1962-04-16 1965-05-25 Floyd J Moltchan Rotary air pump
US3364867A (en) * 1966-01-14 1968-01-23 Itt Sanitary pump with removable port bridges
US3386386A (en) * 1965-02-03 1968-06-04 Sven G. Eriksson Pump for sucking liquid, air and solid particles
US3801241A (en) * 1973-02-08 1974-04-02 Micropump Corp Pump impeller construction
US3832105A (en) * 1972-04-14 1974-08-27 K Takahashi Flexible blade rotary pump
US20180291897A1 (en) * 2017-04-10 2018-10-11 Biotrans Ag Impeller Pump
US11339782B2 (en) 2020-06-26 2022-05-24 LeimbachCausey, LLC Multi-chamber impeller pump

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002630B (de) * 1954-03-31 1957-02-14 Kuyl & Rottinghuis Fluessigkeitspumpe
DE1129829B (de) * 1956-06-01 1962-05-17 Ernst Godderidge Rotierende Verdraengerpumpe
DE1236340B (de) * 1956-07-20 1967-03-09 Jabsco Pump Company Rotierende Verdraengerpumpe
DE8223151U1 (de) * 1982-08-17 1982-11-25 Gardena Kress + Kastner Gmbh, 7900 Ulm Fluessigkeitspumpe
DE102010062298B4 (de) * 2010-12-01 2014-01-02 Finsterwalder Umwelttechnik Gmbh & Co. Kg Impellerpumpe

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US945953A (en) * 1909-03-24 1910-01-11 Samuel Hughes Rotary pump.
US1043936A (en) * 1910-12-19 1912-11-12 John Francis Hope Rotary blower or pump.
US1445721A (en) * 1923-02-20 Salem leon sghleppy
US2007954A (en) * 1932-04-21 1935-07-16 Gunard O Carlson Acid handling equipment and method of producing the same
US2052474A (en) * 1935-09-21 1936-08-25 Corydon M Johnson Rotary pump
US2117011A (en) * 1935-02-27 1938-05-10 Ward E Pratt Centrifugal pump
US2189356A (en) * 1938-08-02 1940-02-06 Arthur M Briggs Rotary pump
US2203974A (en) * 1937-02-08 1940-06-11 Herbert B Trix Pump
US2455194A (en) * 1943-11-10 1948-11-30 Rumsey Lillian Gray Rotary flexible vane pump
US2460952A (en) * 1945-07-28 1949-02-08 Paddle Pumps Inc Rotary pump with elastic rotor sealing rib
US2466440A (en) * 1948-07-29 1949-04-05 Kiekhaefer Elmer Carl Impeller for rotary pumps
US2499163A (en) * 1948-01-31 1950-02-28 H J Rand Washing Machine Corp Rotary pump
US2542268A (en) * 1946-11-22 1951-02-20 Marine Products Company Rotary pump or motor
US2542240A (en) * 1947-12-04 1951-02-20 Marine Products Company Fluid pressure pump or motor

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1445721A (en) * 1923-02-20 Salem leon sghleppy
US945953A (en) * 1909-03-24 1910-01-11 Samuel Hughes Rotary pump.
US1043936A (en) * 1910-12-19 1912-11-12 John Francis Hope Rotary blower or pump.
US2007954A (en) * 1932-04-21 1935-07-16 Gunard O Carlson Acid handling equipment and method of producing the same
US2117011A (en) * 1935-02-27 1938-05-10 Ward E Pratt Centrifugal pump
US2052474A (en) * 1935-09-21 1936-08-25 Corydon M Johnson Rotary pump
US2203974A (en) * 1937-02-08 1940-06-11 Herbert B Trix Pump
US2189356A (en) * 1938-08-02 1940-02-06 Arthur M Briggs Rotary pump
US2455194A (en) * 1943-11-10 1948-11-30 Rumsey Lillian Gray Rotary flexible vane pump
US2460952A (en) * 1945-07-28 1949-02-08 Paddle Pumps Inc Rotary pump with elastic rotor sealing rib
US2542268A (en) * 1946-11-22 1951-02-20 Marine Products Company Rotary pump or motor
US2542240A (en) * 1947-12-04 1951-02-20 Marine Products Company Fluid pressure pump or motor
US2499163A (en) * 1948-01-31 1950-02-28 H J Rand Washing Machine Corp Rotary pump
US2466440A (en) * 1948-07-29 1949-04-05 Kiekhaefer Elmer Carl Impeller for rotary pumps

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772637A (en) * 1952-03-20 1956-12-04 Jabsco Pump Co Impeller pump
US2789511A (en) * 1953-05-25 1957-04-23 Jabsco Pump Co Flexible vane pump impeller
US2882077A (en) * 1954-02-01 1959-04-14 Gen Ind Co Molded plastic rotor hub tightening and driving construction
US2856859A (en) * 1955-01-07 1958-10-21 Visioneering Company Inc Pump
US2855853A (en) * 1956-03-14 1958-10-14 Jabsco Pump Co Pump with slotted cam
US2902935A (en) * 1957-05-24 1959-09-08 Dinnison Arthur Dean Pump assembly having plurality of individual pump units
US3001480A (en) * 1959-06-12 1961-09-26 West Bend Aluminum Co Rotary pump
US3054355A (en) * 1961-04-25 1962-09-18 Lord Mfg Co Pump
US3185385A (en) * 1962-04-16 1965-05-25 Floyd J Moltchan Rotary air pump
US3386386A (en) * 1965-02-03 1968-06-04 Sven G. Eriksson Pump for sucking liquid, air and solid particles
US3364867A (en) * 1966-01-14 1968-01-23 Itt Sanitary pump with removable port bridges
US3832105A (en) * 1972-04-14 1974-08-27 K Takahashi Flexible blade rotary pump
US3801241A (en) * 1973-02-08 1974-04-02 Micropump Corp Pump impeller construction
US20180291897A1 (en) * 2017-04-10 2018-10-11 Biotrans Ag Impeller Pump
CN108691764A (zh) * 2017-04-10 2018-10-23 百川股份公司 叶轮泵
CN108691764B (zh) * 2017-04-10 2020-06-09 百川股份公司 叶轮泵
US11346342B2 (en) * 2017-04-10 2022-05-31 Biotrans Ag Impeller pump having different geometries of the inlet and outlet openings
US11339782B2 (en) 2020-06-26 2022-05-24 LeimbachCausey, LLC Multi-chamber impeller pump

Also Published As

Publication number Publication date
DE830161C (de) 1952-01-31
LU30267A1 (en))
BE497615A (en)) 1950-09-15
FR1023511A (fr) 1953-03-19

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