US2371681A - Centrifugal cutting pump - Google Patents

Centrifugal cutting pump Download PDF

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US2371681A
US2371681A US472690A US47269043A US2371681A US 2371681 A US2371681 A US 2371681A US 472690 A US472690 A US 472690A US 47269043 A US47269043 A US 47269043A US 2371681 A US2371681 A US 2371681A
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cutting
blades
inlet chamber
impeller
shaft
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US472690A
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Jr Augustus C Durdin
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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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating

Definitions

  • This invention relates to centrifugal cutting pumps. Pumps of this character are usually used for pumping liquids containing solid and semi,
  • one object of this invention is to increase the eiliciency of such pumps and to more efiectively reduce the solids into small pieces so that they may readily pass with the flow of liquid through the pump and be pumped to some other station for further treatment.
  • Another object is to prevent clogging and to prevent winding of stringy material around a rotating elements of the pump.
  • Fig. 1 is a view, partly inside elevation and partly in central, vertical, longitudinal section of acentrifugal cutting pump embodying the invention.
  • Fig. 2 is a vertical cross section thereof taken on the line 2-2 of Fig. 1.
  • Fig. 3 is a vertical longitudinal section taken on the line 3--3 of Fig. 2..--
  • Fig. 4 is a detail cross section of a certain cutting blade taken on the line 4-4 of Fig. 1.
  • the reference'character 5 designates the main member of the pump casing, usually cast with a base 6, a suction inlet 1, which terminates in an inlet chamber 8 that leads to the eye 9 of the pump impeller H), which is contained in a volute chamber II.
  • the wals of wh ch may be cast integral with the other walls of the pump casing.
  • One side of the volute chamber is closed by a head I! bolted to the wall of the volute chamber. The latter terminates in a discharged outlet l3.
  • the outer side wall of the inlet chamber 8 has an opening which is closed by a head l4, bolted to said wall of the inlet chamber.
  • the heads l2, M are cast with stufiing boxes l5 for the pump shaft 16, and with bearing brackets ii that include bearing boxes iii in which the pump shaft is journalled.
  • the pump shaft extends through the inlet chamber and the volute chamber, and keyed or otherwise secured upon the shaft in the inlet chamber is a rotating cutting member i9 which extends from the outer side wall of the inlet chamber, through a cutting ring 20, to the eye of the impeller. The latter is keyed upon the shaft and is held in contact with the cutting member l9 by a nut 2
  • the body 22 of the cutt ng element is tapered and tapers toward the impeller. It is cast or otherwise provided with cutting blades 23 disposed helically about the tapered body.- The cutting blades 23 co-operate with a stationary cutting bar 24 which extends parallel with the 'axis of the rotating cutting member and is seated in a re- .ces 25 formed on the inner face'of the part 26a of the wall 26 of the inlet chamber.
  • - cutting bar is. rigidly secured in place by bolts 21 that extend through said part 26a of the wall of the inlet chamber.
  • The-cutting face of the cutting bar is disposed in close proximity to the cutting faces of the cutting blades, to provide a shearing action on material caught between the blades of the rotat ng cutting member and the cutting bar.
  • One side of the cutting bar is shown as sloping toward the rotative cutting element with the part 28 of the suction inlet wall 29 sloping along the same plane and disposed flush with said sloping face of the cutting bar.
  • the rotating cutting member directs liqu ds along said sloping faces and sets up turbulence whereby material caught on the cutting bar' is washed therefrom, enabling it to pass with the flowing stream to the eye of the impeller.
  • the cutting ring 20 is notched to provide a multiplicity of cutting teeth 30 on its internal side which teeth co-operate with the blades of the rotating cutting memberto comminute or reduce any material that may project beyond the cutting faces of the blades.
  • the cutting ring is shown as flanged and is rigidly seated in a bored part 3
  • a cutting blade 32 is provided. which is seated in a recess formed in the side wall of the inlet chamber, and secured therein by a screw or otherwise.
  • the cutting blade 22 co-operates with the rotating cuttng member to shear oii any material that might enter between the side wall and rotating cutting member.
  • the impeller may be provided with any desirable number of impeller blades 33 but the rotating cutting member is formed with a greater number of cuttingblades than the number of impeller blades, certain of the cutting blades joining or abutting against the impeller blade and the blades, the solids are other cutting blades terminating at the spaces between the impeller blades.
  • the bottoms of the notchesbetween therteeth 30 of the cutting ring slope away from the edge of the cutting ring toward the inner face thereof. to enable material which is cut off by the teeth to freely pass into the channels between the cutting blades of the rotating cutting member.
  • Solid and semi-solid materials carried around by the rotating cutting member and caught be-' tween the blades thereof and the stationary cutting bar are sheared off, and the pieces which lodge on the sloping face of the stationary cutting bar are washed from the same and pass with the liquids'to the eye of the impeller and are distributed between the impeller blades. Pieces caught betweenthe cutting blades and'the teeth of the cutting ring are further reduced and pass with the flowing stream to the eye of the impeller.
  • a centrifugal cutting pump the combination with a pump casing having a suction inlet, an inlet chamber formed with a top wall which inclines upwardly from the suction inlet and terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge new and desire to secure by Letters outlet, of a shaft mounted to rotate in said casing, a rotating cutting member mountedon said shaft in said inlet chamber, said rotating cutting-member having a plurality of cutting blades disposed helically about the body thereof, a stationary cutting bar having one face flush with the inclined terminal end of said top wall and mounted in the inlet chamber and co-operating with said rotating cutting member to'reduce solids, and a separately formed impeller mounted on said shaft in the volute chamber with its eye communicating with the channels between the blades of the rotary cutting mem-' ber, said impeller having impeller blades, the
  • a centrifugal cutting pump the combination with a pump casing having a suctioninlet, an inlet chamber formed with a top wall which inclines upwardly from the suction inlet and terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge outlet, of a shaft mounted to rotate in said casing, a rotating cutting member mounted on said shaft in said inlet chamber, said rotating cutting member having a plurality of cutting blades disposed helically about the body thereof, a stationary cutting bar having one face flush with the inclined terminal end of said top wall and mounted in the inlet chamber and co-operating with said rotating cutting member to reduce solids, and a separately formed impeller mounted I on said shaft in the volute chamber with its eye terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge outlet, of a shaft mounted to rotate in said casing, a rotating cutting member mounted on said shaft in the inlet chamber, said rotating cutting member having cutting blades disposed helically about the
  • a centrifugal cutting pump the combination with a pump casing having a suction inlet, an inlet chamber formed with a top wall which inclines upwardly from the suction inlet and terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge opening, of a shaft mounted to rotate in said casing.
  • a rotating cutting member mounted on said shaft in said inlet chamber, said rotating cutting member having cutting blades disposed helically about the body of the rotating cutting member with channels between the blades, a stationary cutting bar disposed above the rotary cutting member and paralleling the axis of the same and secured to a wall of the inlet chamber in shearing relation with respect to said cutting blades, one side face of said cutting bar sloping toward the rotating cutting member and ting member.
  • a centrifugal cutting pump the combination with a pump casing having an inlet chamber, of a shaft mounted to rotate in said casing, a rotating cutting member mounted on said shaft in said inlet chamber, said cutting member having cutting blades disposed helically about the body thereof, a cutting ring mounted in said casing at one side of the inlet chamber and being formed with cutting teeth on its internal face co-operating with the cutting blades to reduce solids, and an impeller mounted on said shaft. in the casing, with its eye in communication with the space between the internal face of the cutting ring and the body of the rotating cutting member.

Description

2 SheetsSheet l A. CJ'IDURDIN, JR
GENIRIFUGAL CUTTING PUMP Filed Jan'. 18, 1943 Man-ch20, 1945.
Patented Mar. 20, 1945.
CENTRIFUGAL CUTTING PUMP Augustus C. Durdin, Jr., Lincolnwood lll. Application January 18, 1943, Serial No. 472,690
Claims. (01. 103-111) This invention relates to centrifugal cutting pumps. Pumps of this character are usually used for pumping liquids containing solid and semi,
solids, such as sludge, and one object of this invention is to increase the eiliciency of such pumps and to more efiectively reduce the solids into small pieces so that they may readily pass with the flow of liquid through the pump and be pumped to some other station for further treatment. Another object is to prevent clogging and to prevent winding of stringy material around a rotating elements of the pump.
Other objects and advantages will appear in the course of this specification and with said objects and advantages in view this invention con sists in the several novel features hereinafter fully set forth and claimed.
One embodiment of the invention is clearly illustrated in the accompanying drawings, in which:
Fig. 1 is a view, partly inside elevation and partly in central, vertical, longitudinal section of acentrifugal cutting pump embodying the invention.
Fig. 2 is a vertical cross section thereof taken on the line 2-2 of Fig. 1.
Fig. 3 is a vertical longitudinal section taken on the line 3--3 of Fig. 2..-
Fig. 4 is a detail cross section of a certain cutting blade taken on the line 4-4 of Fig. 1.
Referring to said drawings. which are merely illustrative of the invention, the reference'character 5 designates the main member of the pump casing, usually cast with a base 6, a suction inlet 1, which terminates in an inlet chamber 8 that leads to the eye 9 of the pump impeller H), which is contained in a volute chamber II. the wals of wh ch may be cast integral with the other walls of the pump casing. One side of the volute chamber is closed by a head I! bolted to the wall of the volute chamber. The latter terminates in a discharged outlet l3.
The outer side wall of the inlet chamber 8 has an opening which is closed by a head l4, bolted to said wall of the inlet chamber. The heads l2, M are cast with stufiing boxes l5 for the pump shaft 16, and with bearing brackets ii that include bearing boxes iii in which the pump shaft is journalled. The pump shaft extends through the inlet chamber and the volute chamber, and keyed or otherwise secured upon the shaft in the inlet chamber is a rotating cutting member i9 which extends from the outer side wall of the inlet chamber, through a cutting ring 20, to the eye of the impeller. The latter is keyed upon the shaft and is held in contact with the cutting member l9 by a nut 2| threaded upon the shaft. The cutting member bears against the flange 2la on the shaft.
The body 22 of the cutt ng element is tapered and tapers toward the impeller. It is cast or otherwise provided with cutting blades 23 disposed helically about the tapered body.- The cutting blades 23 co-operate with a stationary cutting bar 24 which extends parallel with the 'axis of the rotating cutting member and is seated in a re- .ces 25 formed on the inner face'of the part 26a of the wall 26 of the inlet chamber. The
- cutting bar is. rigidly secured in place by bolts 21 that extend through said part 26a of the wall of the inlet chamber. The-cutting face of the cutting bar is disposed in close proximity to the cutting faces of the cutting blades, to provide a shearing action on material caught between the blades of the rotat ng cutting member and the cutting bar. One side of the cutting bar is shown as sloping toward the rotative cutting element with the part 28 of the suction inlet wall 29 sloping along the same plane and disposed flush with said sloping face of the cutting bar. The rotating cutting member directs liqu ds along said sloping faces and sets up turbulence whereby material caught on the cutting bar' is washed therefrom, enabling it to pass with the flowing stream to the eye of the impeller.
The cutting ring 20 is notched to provide a multiplicity of cutting teeth 30 on its internal side which teeth co-operate with the blades of the rotating cutting memberto comminute or reduce any material that may project beyond the cutting faces of the blades. The cutting ring is shown as flanged and is rigidly seated in a bored part 3| of the wall of the inlet chamber.
To prevent pieces of material from lod n between the end of the rotating cuttin member and adjacent side wall of the inlet chamber, a cutting blade 32 is provided. which is seated in a recess formed in the side wall of the inlet chamber, and secured therein by a screw or otherwise. The cutting blade 22 co-operates with the rotating cuttng member to shear oii any material that might enter between the side wall and rotating cutting member.
The impeller may be provided with any desirable number of impeller blades 33 but the rotating cutting member is formed with a greater number of cuttingblades than the number of impeller blades, certain of the cutting blades joining or abutting against the impeller blade and the blades, the solids are other cutting blades terminating at the spaces between the impeller blades.
By having a relatively large number of cutting reduced mor thoroughly and the cut up mas is distributed in the channels between the impeller blades, thereby preventin g clogging of the impeller.
The bottoms of the notchesbetween therteeth 30 of the cutting ring slope away from the edge of the cutting ring toward the inner face thereof. to enable material which is cut off by the teeth to freely pass into the channels between the cutting blades of the rotating cutting member.
Power from any suitable source may be applied to the pump shaft. In operation liquids containing solids and semi-solids flow in through the suction inlet and enter the inlet chamber, passing through the channels between the blades of the rotating cutting member to the eye of the impeller, from which they are discharged by the impeller into the volute chamber and thence discharged through the discharge outlet.
Solid and semi-solid materials carried around by the rotating cutting member and caught be-' tween the blades thereof and the stationary cutting bar are sheared off, and the pieces which lodge on the sloping face of the stationary cutting bar are washed from the same and pass with the liquids'to the eye of the impeller and are distributed between the impeller blades. Pieces caught betweenthe cutting blades and'the teeth of the cutting ring are further reduced and pass with the flowing stream to the eye of the impeller.
I claim as Patent: g
1. In a centrifugal cutting pump the combination with a pump casing having a suction inlet, an inlet chamber formed with a top wall which inclines upwardly from the suction inlet and terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge new and desire to secure by Letters outlet, of a shaft mounted to rotate in said casing, a rotating cutting member mountedon said shaft in said inlet chamber, said rotating cutting-member having a plurality of cutting blades disposed helically about the body thereof, a stationary cutting bar having one face flush with the inclined terminal end of said top wall and mounted in the inlet chamber and co-operating with said rotating cutting member to'reduce solids, and a separately formed impeller mounted on said shaft in the volute chamber with its eye communicating with the channels between the blades of the rotary cutting mem-' ber, said impeller having impeller blades, the
inner ends of which join with adjacent ends of V some of the cutting blades, other cutting blades terminating at the spaces between the impeller blades. g
2. In a centrifugal cutting pump the combination with a pump casing having a suctioninlet, an inlet chamber formed with a top wall which inclines upwardly from the suction inlet and terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge outlet, of a shaft mounted to rotate in said casing, a rotating cutting member mounted on said shaft in said inlet chamber, said rotating cutting member having a plurality of cutting blades disposed helically about the body thereof, a stationary cutting bar having one face flush with the inclined terminal end of said top wall and mounted in the inlet chamber and co-operating with said rotating cutting member to reduce solids, and a separately formed impeller mounted I on said shaft in the volute chamber with its eye terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge outlet, of a shaft mounted to rotate in said casing, a rotating cutting member mounted on said shaft in the inlet chamber, said rotating cutting member having cutting blades disposed helically about the body of the rotating cutting member, with channels between the blades, a stationary cutting bar disposed above the rotating cutting member and paralleling the axis of the same and secured to the top wall of the inlet chamber in shearing relation with respect to the cutting blades, one face of said top wall of the inlet chamber being flush-with an inclined side face of the cutting bar and inclining upwardly toward the suction inlet, and an impeller mounted on said shaft with its eye opening to said channels.
4. In a centrifugal cutting pump the combination with a pump casing having a suction inlet, an inlet chamber formed with a top wall which inclines upwardly from the suction inlet and terminates in a downwardly inclined wall at the inlet chamber, a volute chamber and a discharge opening, of a shaft mounted to rotate in said casing. a rotating cutting member mounted on said shaft in said inlet chamber, said rotating cutting member having cutting blades disposed helically about the body of the rotating cutting member with channels between the blades, a stationary cutting bar disposed above the rotary cutting member and paralleling the axis of the same and secured to a wall of the inlet chamber in shearing relation with respect to said cutting blades, one side face of said cutting bar sloping toward the rotating cutting member and ting member.
5. In a centrifugal cutting pump the combination with a pump casing having an inlet chamber, of a shaft mounted to rotate in said casing, a rotating cutting member mounted on said shaft in said inlet chamber, said cutting member having cutting blades disposed helically about the body thereof, a cutting ring mounted in said casing at one side of the inlet chamber and being formed with cutting teeth on its internal face co-operating with the cutting blades to reduce solids, and an impeller mounted on said shaft. in the casing, with its eye in communication with the space between the internal face of the cutting ring and the body of the rotating cutting member.
AUGUSTUS C. DURDIN, JR.
US472690A 1943-01-18 1943-01-18 Centrifugal cutting pump Expired - Lifetime US2371681A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552889A (en) * 1946-11-22 1951-05-15 Bennett Inc Rotor for dispersion machines
US2562024A (en) * 1945-04-03 1951-07-24 Vanadium Corp Of America Process for concentrating carnotite ores
US2577353A (en) * 1948-07-07 1951-12-04 Abbott Lab Process for producing fibrin from whole blood
US2619292A (en) * 1949-11-29 1952-11-25 Du Pont Slurry pump with screened discharge for preventing lump accumulation
DE968744C (en) * 1950-11-21 1958-03-27 Otto Butter Centrifugal pump for pumping mortar or similar thick matter
DE1079952B (en) * 1956-02-15 1960-04-14 Georg Neidl Dipl Ing Circulation pump with a disk-shaped pump body attached at an angle to the pump shaft
US2975714A (en) * 1954-11-01 1961-03-21 Fmc Corp Screw feed centrifugal pump
US3091436A (en) * 1960-06-17 1963-05-28 Finn Equipment Company Method for producing a sprayable fibre mulch
US3097854A (en) * 1959-06-17 1963-07-16 Francis Shaw & Company Ltd Shaft packing gland
US3185100A (en) * 1962-09-10 1965-05-25 Ralph T Secrest Comminuting pump
US3217654A (en) * 1963-08-08 1965-11-16 Springer Frederick Howard Combination screw and centrifugal submergible pump
US3444818A (en) * 1966-10-10 1969-05-20 Robert W Sutton Centrifugal pump
US3447475A (en) * 1967-01-09 1969-06-03 Albert Blum Centrifugal pump
US3456592A (en) * 1968-03-04 1969-07-22 Parma Water Lifter Co Sewage chopper pump
US3464637A (en) * 1964-07-03 1969-09-02 Escher Wyss Gmbh Laboratory apparatus for determining the industrial beating behaviour of cellulose or paper pulp
US3692422A (en) * 1971-01-18 1972-09-19 Pierre Mengin Ets Shearing pump
US3915394A (en) * 1974-03-21 1975-10-28 Bendix Corp Centrifugal pump including contamination chopping means
US3961758A (en) * 1974-08-23 1976-06-08 Peabody Barnes, Inc. Centrifugal pump with integral grinder
DE2818540A1 (en) * 1977-05-16 1978-11-30 Ahlstroem Oy METHOD AND DEVICE FOR PUMPING FIBER SUSPENSIONS
FR2419414A1 (en) * 1978-03-06 1979-10-05 Porte Freres & Cie Cowshed waste liq. sewage pump - has radial bladed impeller in housing immersed in tank coupled to coaxial intake shredder
FR2525693A1 (en) * 1982-04-21 1983-10-28 Gen Electric FUEL DEGRADATION METHOD AND DEVICE
US4664165A (en) * 1986-02-06 1987-05-12 American Machine And Tool Company, Inc. Surface mounted power tool
EP0233859A1 (en) * 1986-02-14 1987-08-26 Röhren- und Pumpenwerk Rudolf Bauer Aktiengesellschaft Self-priming centrifugal pump for handling liquids mixed with a high fiber content
WO1994001218A1 (en) * 1992-07-09 1994-01-20 Arde, Inc. Grinding pump
US5413460A (en) * 1993-06-17 1995-05-09 Goulds Pumps, Incorporated Centrifugal pump for pumping fiber suspensions
US5699970A (en) * 1996-07-11 1997-12-23 2 M Tool Co., Inc. Meat-comminuting machine with improved vacuum discharge mechanism
US6406635B1 (en) 2001-07-17 2002-06-18 Ruthman Pump And Engineering, Inc. Machine tool coolant system including a pump with chopping mechanism at inlet
WO2002101245A1 (en) * 2001-06-13 2002-12-19 Weir Warman Ltd Apparatus for use in slurry pumps

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562024A (en) * 1945-04-03 1951-07-24 Vanadium Corp Of America Process for concentrating carnotite ores
US2552889A (en) * 1946-11-22 1951-05-15 Bennett Inc Rotor for dispersion machines
US2577353A (en) * 1948-07-07 1951-12-04 Abbott Lab Process for producing fibrin from whole blood
US2619292A (en) * 1949-11-29 1952-11-25 Du Pont Slurry pump with screened discharge for preventing lump accumulation
DE968744C (en) * 1950-11-21 1958-03-27 Otto Butter Centrifugal pump for pumping mortar or similar thick matter
US2975714A (en) * 1954-11-01 1961-03-21 Fmc Corp Screw feed centrifugal pump
DE1079952B (en) * 1956-02-15 1960-04-14 Georg Neidl Dipl Ing Circulation pump with a disk-shaped pump body attached at an angle to the pump shaft
US3097854A (en) * 1959-06-17 1963-07-16 Francis Shaw & Company Ltd Shaft packing gland
US3091436A (en) * 1960-06-17 1963-05-28 Finn Equipment Company Method for producing a sprayable fibre mulch
US3185100A (en) * 1962-09-10 1965-05-25 Ralph T Secrest Comminuting pump
US3217654A (en) * 1963-08-08 1965-11-16 Springer Frederick Howard Combination screw and centrifugal submergible pump
US3464637A (en) * 1964-07-03 1969-09-02 Escher Wyss Gmbh Laboratory apparatus for determining the industrial beating behaviour of cellulose or paper pulp
US3444818A (en) * 1966-10-10 1969-05-20 Robert W Sutton Centrifugal pump
US3447475A (en) * 1967-01-09 1969-06-03 Albert Blum Centrifugal pump
US3456592A (en) * 1968-03-04 1969-07-22 Parma Water Lifter Co Sewage chopper pump
US3692422A (en) * 1971-01-18 1972-09-19 Pierre Mengin Ets Shearing pump
US3915394A (en) * 1974-03-21 1975-10-28 Bendix Corp Centrifugal pump including contamination chopping means
US3961758A (en) * 1974-08-23 1976-06-08 Peabody Barnes, Inc. Centrifugal pump with integral grinder
DE2818540A1 (en) * 1977-05-16 1978-11-30 Ahlstroem Oy METHOD AND DEVICE FOR PUMPING FIBER SUSPENSIONS
FR2419414A1 (en) * 1978-03-06 1979-10-05 Porte Freres & Cie Cowshed waste liq. sewage pump - has radial bladed impeller in housing immersed in tank coupled to coaxial intake shredder
FR2525693A1 (en) * 1982-04-21 1983-10-28 Gen Electric FUEL DEGRADATION METHOD AND DEVICE
US4664165A (en) * 1986-02-06 1987-05-12 American Machine And Tool Company, Inc. Surface mounted power tool
EP0233859A1 (en) * 1986-02-14 1987-08-26 Röhren- und Pumpenwerk Rudolf Bauer Aktiengesellschaft Self-priming centrifugal pump for handling liquids mixed with a high fiber content
WO1994001218A1 (en) * 1992-07-09 1994-01-20 Arde, Inc. Grinding pump
US5302082A (en) * 1992-07-09 1994-04-12 Arde, Inc. Improved efficiency grinding pump for slurry
US5413460A (en) * 1993-06-17 1995-05-09 Goulds Pumps, Incorporated Centrifugal pump for pumping fiber suspensions
US5699970A (en) * 1996-07-11 1997-12-23 2 M Tool Co., Inc. Meat-comminuting machine with improved vacuum discharge mechanism
WO2002101245A1 (en) * 2001-06-13 2002-12-19 Weir Warman Ltd Apparatus for use in slurry pumps
US20040146416A1 (en) * 2001-06-13 2004-07-29 Burgess Kevin Edward Apparatus for use in slurry pumps
US6951445B2 (en) 2001-06-13 2005-10-04 Weir Warman Ltd Apparatus for use in slurry pumps
US6406635B1 (en) 2001-07-17 2002-06-18 Ruthman Pump And Engineering, Inc. Machine tool coolant system including a pump with chopping mechanism at inlet

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