US1988875A - Wet vacuum pump and rotor therefor - Google Patents

Wet vacuum pump and rotor therefor Download PDF

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Publication number
US1988875A
US1988875A US716225A US71622534A US1988875A US 1988875 A US1988875 A US 1988875A US 716225 A US716225 A US 716225A US 71622534 A US71622534 A US 71622534A US 1988875 A US1988875 A US 1988875A
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rotor
pump
periphery
faces
casing
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US716225A
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Saborio Carlos
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/18—Centrifugal pumps characterised by use of centrifugal force of liquids entrained in pumps

Definitions

  • a further object of my invention is the provision of a displacement or vacuum pump which does not depend for its operation on close contact of its working parts.
  • a still further object of my invention is the pro vision of a displacement or vacuum pump possessing many advantages over existing designs among which advantages may be mentioned extremely low cost of manufacture; non-contact of working ⁇ parts resulting high efficiency and adaptability for high speeds; capability of relatively small machines handling large volumes of materials; pump does not over-s load if run at shut-o, etc.
  • my pump essentially comprises a stationary casing and a rotor mounted for rotation therein.
  • the casing provides a. chamber wherein to mount the rotor and is equipped with an outlet connected by one or more passages to the chamber in the easing.
  • the casing is equipped with a drive shaft set within the chamber, and mounting the pump rotorthe casing, furthermore, being provided with an inlet connecting to a central opening with which the rotor is provided'.
  • the rotor is in the nature of a disc in which provision is made for the central mounting of the drive shaft.
  • the rotor is 40 equipped with a central opening; in addition the periphery of the rotor is provided with a plurality of faces regularly disposed circumferentially.
  • the rotor with a plurality of passages connecting the central intake opening of the rotorto the rotor periphery.
  • the pump casing as well as the pump'rotor may take a variety of forms, some of which I have illustrated in the accompanying drawing. It is to be .A distinctly understood, however, that the embodiments shown are primarily for purposes of illustration and. do not in any sense constitute an attempt to exhaust all possibilities so far as variety of design is concerned.
  • the ⁇ essentials of both lpump casing and pump rotor have been clearly In the accompanying drawing:
  • Fig. 1 is e. sectional elevational view of one em bodiment of my inventiom'
  • Fig. 2 is a section on the line 2-2 of Fig. 1; 6 rigs. s, e and 5 are perspective views in part secin dependability and long wear;
  • Fig. 6 is a perspective view of still another embodiment of my new pump rotor.
  • Fig. 'I is a view similarA to Fig. ,l showing still another form of rotor mounted within a pump casing. l
  • A designates the pump casing providing a chamber for the reception of a pump rotor E of the solid type as distinguished from a ring motor the rotor rotating with its' periphery close to the wall oi the chamber.
  • the chamber of the pumpcasing A may be prou vided with a partition E lying closely adjacent the periphery of the rotor providing two intercommunicating channels F and G leading from the casing chamber at circumferentially spaced points.
  • the pump casing is further equipped with outlet I-l and outlet pipe l.
  • Fig. 2 J esignas a suction pipe connected to the intake side of the pump casing, this pipe being controlled by a. check valve K.
  • the rotor B is provided with a central opening L facing the intake of the pump, and with a plurality of passages M extending through the rotor from the central opening L to the rotor periphery.
  • the rotor periphery is grooved circumferentially, each of these grooves varying in depth to provide the rotor periphery with a plurality of symmetrical concave faces N providing peripheral V,recess or pockets N' enclosed within lateral walls O.
  • the bottoms of the peripheral recesses or pockets have been shown concave in Figs. 1, 3 and 5, for example. It is to be understood, however, that this is by no means by way of limitation, but ⁇ merely for purposes of illustratie inasmuch as these faces may take other shapes, such as shown, Y
  • these faces may be spaced ferentially of the rotor -a's illustrated in Fig. i where I have shown only three faces, o'r closer soin'e distance apart circumtogether as illustrated in Figs. 3 and e, or actually abutting or adjoining each other as shown in Fig. 5.
  • the passages M extending outwardly from the central opening L of the rotor may be straight or curved and may extend tangentially of the rotor as illustrated in Figs. 1, 3 and 5, for example, or radially as shown in Fig. 4. These passages which extend to the rotorperiphery adjacent the leading edge of each face have an outlet end which is small relatively to the area of each face.
  • My new pump operates as follows: The pump is sealed with a liquid down to the check valve K. Ihe suction pipe J which of course is connected to the supply of lmaterial to be handled remains lled with air at atmospheric pressure.
  • the rotor B is started in the direction of the arrow thereon in Fig. 1, and the rotation of the rotor creates a head that exhausts through the discharge passage F, outlet H and discharge pipe I all of the liquid contained in the inlet P, rotor inlet opening L, and the passages M in the rotor.
  • a solid pump rotor the periphery of which is provided with a plurality of faces regularly disposed circumferentially of the rotor, said rotor being provided with a central intake opening and with passages within the rotor leading from said central intake opening to the periphery of the rotor, the radial distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angels to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center.
  • a solid pump rotor the periphery of which is provided with a plurality of faces regularly disposed circumferentially of theprotor, said rotor being provided with an intake opening at the center and with passages within the rotor leading from said intake opening to the periphery of the rotor adjacent the leading edges of said faces, the area of the outlet end of each of said passages being small relatively to the area of each of said faces, the radial distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the lface at each side of said center.
  • a solid pump rotor the periphery of which is provided with a plurality of plane faces regularly disposed circumferentially of the rotor, said rotor being provided with an intake opening at its center and with passages leading from said central intake opening to the rotor periphery.
  • a solid pump rotor the periphery of which is provided with a plurality of concave faces-regu larly disposed circumferentially of the rotor, the radial distances from the center of the rotor to each of said concave faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center, said rotor being provided with a central intake opening and with passages leading from said central intake opening to the periphery of the rotor.
  • a casing providing a chamber, said casing being provided with an inlet and with an outlet, a rotor mounted for rotation therein with its periphery close to the wall of the chamber, a
  • said rotor being 'leading from said central intake opening to the rotor periphery, and on its periphery with a plurality of faces regularly disposed circumferentially of the rotor, the radial distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center, said chamber being provided with a plurality of intercommunicating passages leading from circumferentially spaced points insaid chamber to the outlet of the casing.
  • a casing providing a chamber, said casing being provided with an inlet and with an outlet, a rotor mounted for rotation therein with its periphery close to the wall of the chamber, a central drive shaft for said rotor, said rotor being provided with a central intake opening communicating with the casing intake and with passages leading from said central intake opening lto the rotor periphery, and on its periphery with a plurality of faces regularly disposed circumferentially of the rotor, the radial' distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotorincreasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center, said chamber being provided with two intercommunicating passages leading from circumferentially spaced points in said chamber to the outlet.

Description

Jan. 22, 1935. c. sABoRlo WET VACUUM PUMP AND RTOR THEREFOR Filed Marci 19, 1884 INVENTOR ATTORN EYS 55 set out above.
` atented dan. 22, 19235 irse "stares revenir orgies I war vacarme vom am) porca manson Gerlos Saborio, New York, N. Y. Application March i9, H34, Serial No. 716,225 e orama- Kei. ross-ee) capable of handling liquids and gases. v With re spect to the latter the gas can be exhausted or io compressed, and the only requirement is that the pump be sealed with any suitable liquid.
A further object of my invention is the provision of a displacement or vacuum pump which does not depend for its operation on close contact of its working parts.
A still further object of my invention is the pro vision of a displacement or vacuum pump possessing many advantages over existing designs among which advantages may be mentioned extremely low cost of manufacture; non-contact of working `parts resulting high efficiency and adaptability for high speeds; capability of relatively small machines handling large volumes of materials; pump does not over-s load if run at shut-o, etc.
As above mentioned my pump essentially comprises a stationary casing and a rotor mounted for rotation therein. The casing provides a. chamber wherein to mount the rotor and is equipped with an outlet connected by one or more passages to the chamber in the easing. ln addition the casing is equipped with a drive shaft set within the chamber, and mounting the pump rotorthe casing, furthermore, being provided with an inlet connecting to a central opening with which the rotor is provided'.
The rotor is in the nature of a disc in which provision is made for the central mounting of the drive shaft. As above mentioned the rotor is 40 equipped with a central opening; in addition the periphery of the rotor is provided with a plurality of faces regularly disposed circumferentially. of
the rotor with a plurality of passages connecting the central intake opening of the rotorto the rotor periphery.
The pump casing as well as the pump'rotor may take a variety of forms, some of which I have illustrated in the accompanying drawing. It is to be .A distinctly understood, however, that the embodiments shown are primarily for purposes of illustration and. do not in any sense constitute an attempt to exhaust all possibilities so far as variety of design is concerned. The `essentials of both lpump casing and pump rotor have been clearly In the accompanying drawing:
.,Fig. 1 is e. sectional elevational view of one em bodiment of my inventiom' Fig. 2 is a section on the line 2-2 of Fig. 1; 6 rigs. s, e and 5 are perspective views in part secin dependability and long wear;
tion of three further embodiments of my new pump rotor;
Fig. 6 is a perspective view of still another embodiment of my new pump rotor; and
Fig. 'I is a view similarA to Fig. ,l showing still another form of rotor mounted within a pump casing. l
Referring to thedrawing in detail and first of al1 to Figs. 1 and 2.
A designates the pump casing providing a chamber for the reception of a pump rotor E of the solid type as distinguished from a ring motor the rotor rotating with its' periphery close to the wall oi the chamber.
. C designates a drive shaft, driven from any suitable source of power and extending into the casing chamber through a stumng box D, where it receives and mounts the rotor B for rotation, the drive shaft as will be seen from Fig. 1 being dis= posed centrally of the rotor.
The chamber of the pumpcasing A may be prou vided with a partition E lying closely adjacent the periphery of the rotor providing two intercommunicating channels F and G leading from the casing chamber at circumferentially spaced points. The pump casing is further equipped with outlet I-l and outlet pipe l.
as will be. seen from Fig. 2 J esignas a suction pipe connected to the intake side of the pump casing, this pipe being controlled by a. check valve K.
The rotor B is provided with a central opening L facing the intake of the pump, and with a plurality of passages M extending through the rotor from the central opening L to the rotor periphery.
The rotor periphery is grooved circumferentially, each of these grooves varying in depth to provide the rotor periphery with a plurality of symmetrical concave faces N providing peripheral V,recess or pockets N' enclosed within lateral walls O. The bottoms of the peripheral recesses or pockets have been shown concave in Figs. 1, 3 and 5, for example. It is to be understood, however, that this is by no means by way of limitation, but `merely for purposes of illustratie inasmuch as these faces may take other shapes, such as shown, Y
for example, in Fig. 4 where they are fiat or plane.
It is to be understood, furthermore, that these faces may be spaced ferentially of the rotor -a's illustrated in Fig. i where I have shown only three faces, o'r closer soin'e distance apart circumtogether as illustrated in Figs. 3 and e, or actually abutting or adjoining each other as shown in Fig. 5.
In all forms, however, it is to be seen that the radial distances' from the center of the rotor to each 'of said faces in any plane passing through the rotor at right angles to the axis of rotation of the rotor increase uniformly from the circumferential center of the face to the terminals of face at each side of said center.
The passages M extending outwardly from the central opening L of the rotor may be straight or curved and may extend tangentially of the rotor as illustrated in Figs. 1, 3 and 5, for example, or radially as shown in Fig. 4. These passages which extend to the rotorperiphery adjacent the leading edge of each face have an outlet end which is small relatively to the area of each face.
' My new pump operates as follows: The pump is sealed with a liquid down to the check valve K. Ihe suction pipe J which of course is connected to the supply of lmaterial to be handled remains lled with air at atmospheric pressure. The rotor B is started in the direction of the arrow thereon in Fig. 1, and the rotation of the rotor creates a head that exhausts through the discharge passage F, outlet H and discharge pipe I all of the liquid contained in the inlet P, rotor inlet opening L, and the passages M in the rotor.
As the peripheral recesses `or'pockets N of the rotor pass by the passage F the liquid carried in these pockets or recesses is discharged into this passage by displacement, drawing air through the passages M of the rotor to fill the unoccupied space in the recesses or'pockets of the rotor. As these recesses or pockets N containing air pass by the passage G the liquid contained in this passage willv displace the air, thus filling the pockets with pocketed liquid. This liquid is carried around with the rotor and again discharged by displacement into the passage F, repeating the opthe eration until all of the ai* contained in the suction end of the pump is exhausted. The pump then starts delivering a continuous flow of liquid.
In the rotor of Fig. 6 I have dispensed with the lateral walls O above referred to and likewise in the embodiment of my invention shown in Fig. '7.
'I'he periphery of eachof the rotors of both of' these last mentioned figures, however, is provided with a'plurality of symmetrical faces, as in the other embodiments of my invention, the faces R of Fig. B being concaved, while the faces S of Fig. 'l are plane.
In principle the operation of these forms or4 embodiments of the invention is the same as in Figs. 1 to 5, the rotation of the rotor within the casing chamber close to the wall ofthe chamber pocketing the liquid being' handled inthe same fashion as above described until nally the pump Starts delivering a continuous flow of liquid by displacement.
What I claim is:
1. A solid pump rotor the periphery of which is provided with a plurality of faces regularly disposed circumferentially of the rotor, said rotor being provided with a central intake opening and with passages within the rotor leading from said central intake opening to the periphery of the rotor, the radial distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angels to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center.
2. A solid pump rotor the periphery of which is provided with a plurality of faces regularly disposed circumferentially of theprotor, said rotor being provided with an intake opening at the center and with passages within the rotor leading from said intake opening to the periphery of the rotor adjacent the leading edges of said faces, the area of the outlet end of each of said passages being small relatively to the area of each of said faces, the radial distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the lface at each side of said center.
3.' A solid pump rotor the periphery of which is provided with a plurality of plane faces regularly disposed circumferentially of the rotor, said rotor being provided with an intake opening at its center and with passages leading from said central intake opening to the rotor periphery.
4. A solid pump rotor the periphery of which is provided with a plurality of concave faces-regu larly disposed circumferentially of the rotor, the radial distances from the center of the rotor to each of said concave faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center, said rotor being provided with a central intake opening and with passages leading from said central intake opening to the periphery of the rotor.
5. In a displacement or vacuum pump the combination of a casing providing a chamber, said casing being provided with an inlet and with an outlet, a rotor mounted for rotation therein with its periphery close to the wall of the chamber, a
central drive shaft for said rotor, said rotor being 'leading from said central intake opening to the rotor periphery, and on its periphery with a plurality of faces regularly disposed circumferentially of the rotor, the radial distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotor, increasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center, said chamber being provided with a plurality of intercommunicating passages leading from circumferentially spaced points insaid chamber to the outlet of the casing. g
6. In a displacement or vacuum pump the combination of a casing providing a chamber, said casing being provided with an inlet and with an outlet, a rotor mounted for rotation therein with its periphery close to the wall of the chamber, a central drive shaft for said rotor, said rotor being provided with a central intake opening communicating with the casing intake and with passages leading from said central intake opening lto the rotor periphery, and on its periphery with a plurality of faces regularly disposed circumferentially of the rotor, the radial' distances from the center of the rotor to each of said faces, in any plane passing through the rotor at right angles to the axis of rotation of the rotorincreasing uniformly from the circumferential center of the face to the terminals of the face at each side of said center, said chamber being provided with two intercommunicating passages leading from circumferentially spaced points in said chamber to the outlet.
US716225A 1934-03-19 1934-03-19 Wet vacuum pump and rotor therefor Expired - Lifetime US1988875A (en)

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Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460122A (en) * 1944-11-22 1949-01-25 Arthur W Burks Pump
US2471653A (en) * 1946-04-27 1949-05-31 Vincent Palumbo Pump or the like
US2547645A (en) * 1945-11-15 1951-04-03 United Aircraft Corp Hydraulic pump
US2924182A (en) * 1955-08-31 1960-02-09 American Brake Shoe Co Fluid pressure energy translating device
US2948524A (en) * 1957-02-18 1960-08-09 Metal Pumping Services Inc Pump for molten metal
US3181471A (en) * 1961-06-23 1965-05-04 Babcock & Wilcox Co Centrifugal pump construction
US3227089A (en) * 1963-04-23 1966-01-04 Philips Corp Centrifugal pump
US3260216A (en) * 1964-08-21 1966-07-12 Goulds Pumps Venturi-centrifugal pump
US3463088A (en) * 1964-10-22 1969-08-26 Ajem Lab Inc Pump
US3788765A (en) * 1971-11-18 1974-01-29 Laval Turbine Low specific speed compressor
US4195965A (en) * 1977-03-18 1980-04-01 Walter Masnik Ram pump flowmeter
US5257910A (en) * 1988-12-23 1993-11-02 Ksb Aktiengesellschaft Centrifugal pump impeller with a low specific speed of rotation
US5599164A (en) * 1995-04-03 1997-02-04 Murray; William E. Centrifugal process pump with booster impeller
US6019576A (en) * 1997-09-22 2000-02-01 Thut; Bruno H. Pumps for pumping molten metal with a stirring action
US20020182078A1 (en) * 1999-05-21 2002-12-05 David Reinfeld Vortex attractor without impeller vanes
US20050053499A1 (en) * 2003-07-14 2005-03-10 Cooper Paul V. Support post system for molten metal pump
US20080213111A1 (en) * 2002-07-12 2008-09-04 Cooper Paul V System for releasing gas into molten metal
US20080279704A1 (en) * 2002-07-12 2008-11-13 Cooper Paul V Pump with rotating inlet
US20080314548A1 (en) * 2007-06-21 2008-12-25 Cooper Paul V Transferring molten metal from one structure to another
US20090054167A1 (en) * 2002-07-12 2009-02-26 Cooper Paul V Molten metal pump components
US20090191065A1 (en) * 2006-08-26 2009-07-30 Ksb Aktiengesellschaft Feed Pump
US20090269191A1 (en) * 2002-07-12 2009-10-29 Cooper Paul V Gas transfer foot
US20100111680A1 (en) * 2007-04-28 2010-05-06 Ksb Aktiengesellschaft Delivery Pump
US20110133051A1 (en) * 2009-08-07 2011-06-09 Cooper Paul V Shaft and post tensioning device
US20110133374A1 (en) * 2009-08-07 2011-06-09 Cooper Paul V Systems and methods for melting scrap metal
US20110140319A1 (en) * 2007-06-21 2011-06-16 Cooper Paul V System and method for degassing molten metal
US20110142606A1 (en) * 2009-08-07 2011-06-16 Cooper Paul V Quick submergence molten metal pump
US20110148012A1 (en) * 2009-09-09 2011-06-23 Cooper Paul V Immersion heater for molten metal
US20110163486A1 (en) * 2009-08-07 2011-07-07 Cooper Paul V 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
US9156087B2 (en) 2007-06-21 2015-10-13 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460122A (en) * 1944-11-22 1949-01-25 Arthur W Burks Pump
US2547645A (en) * 1945-11-15 1951-04-03 United Aircraft Corp Hydraulic pump
US2471653A (en) * 1946-04-27 1949-05-31 Vincent Palumbo Pump or the like
US2924182A (en) * 1955-08-31 1960-02-09 American Brake Shoe Co Fluid pressure energy translating device
US2948524A (en) * 1957-02-18 1960-08-09 Metal Pumping Services Inc Pump for molten metal
US3181471A (en) * 1961-06-23 1965-05-04 Babcock & Wilcox Co Centrifugal pump construction
US3227089A (en) * 1963-04-23 1966-01-04 Philips Corp Centrifugal pump
US3260216A (en) * 1964-08-21 1966-07-12 Goulds Pumps Venturi-centrifugal pump
US3463088A (en) * 1964-10-22 1969-08-26 Ajem Lab Inc Pump
US3788765A (en) * 1971-11-18 1974-01-29 Laval Turbine Low specific speed compressor
US4195965A (en) * 1977-03-18 1980-04-01 Walter Masnik Ram pump flowmeter
US5257910A (en) * 1988-12-23 1993-11-02 Ksb Aktiengesellschaft Centrifugal pump impeller with a low specific speed of rotation
US5599164A (en) * 1995-04-03 1997-02-04 Murray; William E. Centrifugal process pump with booster impeller
US6019576A (en) * 1997-09-22 2000-02-01 Thut; Bruno H. Pumps for pumping molten metal with a stirring action
US20020182078A1 (en) * 1999-05-21 2002-12-05 David Reinfeld Vortex attractor without impeller vanes
US8529828B2 (en) 2002-07-12 2013-09-10 Paul V. Cooper Molten metal pump components
US8361379B2 (en) 2002-07-12 2013-01-29 Cooper Paul V Gas transfer foot
US20080279704A1 (en) * 2002-07-12 2008-11-13 Cooper Paul V Pump with rotating inlet
US8110141B2 (en) 2002-07-12 2012-02-07 Cooper Paul V Pump with rotating inlet
US8178037B2 (en) 2002-07-12 2012-05-15 Cooper Paul V System for releasing gas into molten metal
US20090054167A1 (en) * 2002-07-12 2009-02-26 Cooper Paul V Molten metal pump components
US20080213111A1 (en) * 2002-07-12 2008-09-04 Cooper Paul V System for releasing gas into molten metal
US20090269191A1 (en) * 2002-07-12 2009-10-29 Cooper Paul V Gas transfer foot
US8409495B2 (en) 2002-07-12 2013-04-02 Paul V. Cooper Rotor with inlet perimeters
US8440135B2 (en) 2002-07-12 2013-05-14 Paul V. Cooper System for releasing gas into molten metal
US9435343B2 (en) 2002-07-12 2016-09-06 Molten Meal Equipment Innovations, LLC Gas-transfer foot
US9034244B2 (en) 2002-07-12 2015-05-19 Paul V. Cooper Gas-transfer foot
US7906068B2 (en) 2003-07-14 2011-03-15 Cooper Paul V Support post system for molten metal pump
US8501084B2 (en) 2003-07-14 2013-08-06 Paul V. Cooper Support posts for molten metal pumps
US8475708B2 (en) 2003-07-14 2013-07-02 Paul V. Cooper Support post clamps for molten metal pumps
US8075837B2 (en) 2003-07-14 2011-12-13 Cooper Paul V Pump with rotating inlet
US20050053499A1 (en) * 2003-07-14 2005-03-10 Cooper Paul V. Support post system for molten metal pump
US20110220771A1 (en) * 2003-07-14 2011-09-15 Cooper Paul V Support post clamps for molten metal pumps
US20080304970A1 (en) * 2003-07-14 2008-12-11 Cooper Paul V Pump with rotating inlet
US20090191065A1 (en) * 2006-08-26 2009-07-30 Ksb Aktiengesellschaft Feed Pump
US8021133B2 (en) * 2006-08-26 2011-09-20 Ksb Aktiengesellschaft Feed pump
AU2007291652B2 (en) * 2006-08-26 2011-08-18 KSB SE & Co. KGaA Delivery pump
US20100111680A1 (en) * 2007-04-28 2010-05-06 Ksb Aktiengesellschaft Delivery Pump
US10458708B2 (en) 2007-06-21 2019-10-29 Molten Metal Equipment Innovations, Llc Transferring molten metal from one structure to another
US9982945B2 (en) 2007-06-21 2018-05-29 Molten Metal Equipment Innovations, Llc Molten metal transfer vessel and method of construction
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