US3650481A - Grinder pump - Google Patents

Grinder pump Download PDF

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Publication number
US3650481A
US3650481A US130276A US3650481DA US3650481A US 3650481 A US3650481 A US 3650481A US 130276 A US130276 A US 130276A US 3650481D A US3650481D A US 3650481DA US 3650481 A US3650481 A US 3650481A
Authority
US
United States
Prior art keywords
grinder
teeth
impeller
pump
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
US130276A
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English (en)
Inventor
William J Conery
Donald A Kaessen
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.)
HYDR O MATIC PUMP CO
SPX Technologies Inc
Original Assignee
HYDR O MATIC PUMP CO
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 HYDR O MATIC PUMP CO filed Critical HYDR O MATIC PUMP CO
Application granted granted Critical
Publication of US3650481A publication Critical patent/US3650481A/en
Assigned to MARLEY-WYLAIN COMPANY, reassignment MARLEY-WYLAIN COMPANY, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE 12-28-80 Assignors: WYLAIN, INC.
Assigned to GENERAL SIGNAL CORPORATION, A CORP. OF NEW YORK reassignment GENERAL SIGNAL CORPORATION, A CORP. OF NEW YORK ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MARLEY WYLAIN COMPANY, THE
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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage

Definitions

  • the grinder pump includes an electric motor drive, cooperating cutter blade and grinder members one of which is secured to the motor shaft at an inlet for the grinder pump unit, an axial flow inducer impeller axially inwardly of and immediately adjacent to the cooperating cutter blade and grinder members, and a centrifugal pump means having an inlet directly connecting to and receiving the discharge from the axial flow inducer impeller, all of the driven members being controlled by and carried on the shaft of the electric motor.
  • the present invention in general, relates to a grinder pump unit having improved characteristics for pumping liquids, and cutting up solids in the volume of liquid being processed.
  • the general object of the present invention is to provide a novel and improved pumpgrinder means which includes a separate pump to aid in drawing pumped liquids through the grinder unit of the invention at a desirable fast volume flow rate.
  • a further object of the invention is to provide improved grinder and/or cutting actions in the grinder unit; and to provide an axial flow inducer impeller which cooperates with the initial grinding or cutting section of the unit for additional cutting action and a drawing or forcing of the pumped liquid axially in the unit, and a centrifugal pump connected to and receiving the discharge from the axial flow inducer impeller for pumping it out of the unit.
  • Another object of the invention is to provide an improved association between an inlet rotating cutter blade and an associated stationary grinder ring means having a plurality of cutting and/or grinding teeth provided thereon and wherein alternate teeth in the grinder ring are of different radial lengths to improve the cutting action and axial flow of a liquidsolid mixture through the apparatus of the invention.
  • Another object of the invention is to provide a grinder pump unit which is adapted to process large volumes of sewage or other materials such as liquids having solids therein and including rags, garbage and other materials and wherein the grinder pump unit will break up the solids into small pieces for flow through the apparatus of the invention for processing large volumes of sewage or other materials rapidly and efficiently.
  • an improved grinder ring tooth assembly for use in association with a driven cutter blade at the inlet of the unit and for improved volume flow of materials through the apparatus with a minimum of vibration to the rotating cutter blade; to provide sizable passages for fluids in the initial cutting or grinding zone of the unit; to provide an improved secondary cutting action in a grinder pump assembly by a disc type of an axial flow inducer impeller located axially immediately adjacent the stationary grinder ring for a secondary cutting action between the initial cutting members and the axial flow inducer impeller in the apparatus; to provide an axial flow inducer impeller wherein the teeth thereon extend the full axial length of the impeller whereby the impeller can be turned over, after removal from the apparatus, and be replaced to provide a double cutting life for the impeller before requiring sharpening; to provide improved cooperation between the teeth on an axial flow inducer impeller and associated inlet cutting or grinding means in the apparatus, to provide an odd number of cutting teeth on the inlet grinder ring and with alternate teeth being a different radial length
  • FIG. 1 is a vertical section through the grinder pump embodying the principles of the invention and diagrammatically showing such grinder pump positioned in a sump;
  • FIG. 2 is a fragmentary inlet end elevation of the grinder pump of FIG. 1;
  • FIG. 3 is a vertical section of the grinder ring means of FIG.
  • FIG. 4 is a fragmentary elevation of the stationary grinder ring of the apparatus of FIG. 1;
  • FIG. 5 is an end elevation, partially in vertical section, of the stationary grinder ring of FIG. 4;
  • FIG. 6 is a fragmentary elevation of the cutter ring blade of the apparatus
  • FIG. 7 is a side elevation of the cutter ring of FIG. 6;
  • FIG. 8 is a fragmentary plan of the axial flow inducer impeller of the apparatus.
  • FIG. 9 is an elevation of the impeller of FIG. 8 taken on line 9-9;
  • FIG. 10 is a vertical section through the pump impeller of the centrifugal pump in the grinder pump.
  • FIG. 11 is a fragmentary plan view of a portion of the impeller of FIG. 10 taken on line ll-l1.
  • the present invention as one embodiment thereof, relates to a grinder pump unit adapted for forced flow of sewage or other material therethrough and wherein a housing and electric motor means is present and includes a shaft extending from the motor, the housing having an inlet provided therefor and cooperating cutter blade and grinder means members are positioned at the inlet for the unit with the cutter blade member being secured to the shaft, an axial flow inducer impeller is secured to the shaft axially inwardly immediately adjacent the cutter blade member, and a centrifugal pump means is provided within the housing and includes an impeller secured to the shaft.
  • the pump has an inlet directly connecting to and receiving the discharge from the axial flow inducer impeller, and a discharge means is provided for the pump and connects thereto.
  • This grinder pump includes a housing indicated as a whole by the numeral 12 with a suitable electric motor 14 being provided in one portion of the housing 12 which is shown made from several axially abutting sections.
  • the electric motor 14 has a shaft 16 which protrudes therefrom and extends substantially to an inlet 18 provided at one end of the housing 12.
  • This inlet 18 is formed in an inlet ring 20 that is secured to a section 22 of the housing 12 as by cap screws 24 or the like.
  • the inlet ring preferably has a pinrality of cutting or grinder teeth 26 formed therein and extending generally axially thereof.
  • the axially outer end of the motor shaft 16 has an inlet cutter blade member or rotor 28 secured thereto, and such cutter or grinder disc or member 28 has at least a pair of axially outwardly extending cutter blades 30 and 32 formed thereon or usually formed integrally therewith and terminating in axially directed outer edges 34 at the periphery of the disc as best shown in FIGS. 6 and 7 of the drawings.
  • Any other suitable or conventional cutter or grinder means including smaller teeth 36 are provided on the axially outer face of the disc 28 for additional cutting, grinding or shredding action on materials being introduced into or flowing through the grinder pump of the invention.
  • the initial or primary grinding and/or cutting action is obtained in the grinder pump by cooperation of the disc 28 and the teeth thereon with a fixedly positioned grinder ring, means or member 38 that is of annular form and is suitably seated in a recess provided in the housing section 22 and secured thereto in any conventional manner.
  • This grinder member 38 is of annular form and is shown in detail in FIGS. 4 and of the drawings which indicate that a plurality of grinder teeth 40 are provided at circumferentially spaced radially inner portions of the grinder member 38 and with, preferably, a circumferentially outwardly curved recess 41 being provided intermediate each pair of the grinder teeth 40.
  • an odd number of grinder teeth 40 are provided in the grinder ring 38 and with alternate ones of these teeth as indicated at 400 and 40b being of different radial length, as indicated by the different lengths of the lines 11-6 and a-d in FIG. 4.
  • one pair of adjacent teeth have the same radial length and in this instance, the tooth 400 is shown to be of the same length as its adjacent tooth 40a and where the spacing of this tooth from the center of the ring is indicated by the line a-d, which is of the same length as the line a-c.
  • a relatively large pathway is provided by the recesses 41 in the grinder ring 38 whereby the material being pumped can rapidly flow in volume through the operating grinder and/or cutting zone or assembly formed by the cutter or grinder disc 28 in association with the grinder ring 38 that encompasses the grinder disc.
  • the circumferentially spaced axially extending cutting edges of the grinder teeth 40 are immediately adjacent and parallel to the straight edges 34 on the axially extending cutter blades 30 and 32 on the cutter disc 28 for effective cutting and grinding action by driven rotation of the shaft 16.
  • an axial flow inducer impeller 42 is positioned immediately adjacent to the grinder disc 28 on the axially inner surface thereof and which impeller 42 is of generally disc shape.
  • This axial flow inducer impeller has a plurality of blades or teeth 44 provided thereon which teeth 44 have an appreciably inclination, as shown in FIG. 9, to the longitudinal axis of the grinder pump and which teeth likewise extend some appreciable circumferential distance around the periphery of the impeller 42.
  • only four of these teeth 44 are shown and they are circumferentially spaced from each other and with the ends of each of the teeth 44 terminating flush with an edge surface of the impeller as indicated at 44a and 44b of the drawings.
  • This impeller 42 is suitably secured to the shaft 16 for drive thereby, and it should be noted that the axially outer edges 44a of the teeth 44 are positioned immediately adjacent and below the axially inner edges or ends of the individual teeth 40 provided on the grinder ring 38 whereby any elongate or fibrous members passing into the grinder pump have a secondary cutting or shredding action effected thereon by the relative rotation of the impeller 42 in relation to the grinder ring 38 and the teeth thereon.
  • a centrifugal pump is formed as a unit with the remaining portions of the apparatus and which unit includes an impeller 46 suitably secured to and carried by the motor shaft 16 for drive thereof as a unit with the grinder disc 28 and associated means.
  • This impeller 46 is a portion ofa centrifugal pump 48 that forms an enclosure around the impeller 46 by a portion of the housing section 22 that forms a pumping chamber 50 around the periphery of the impeller 46.
  • the impeller 46 may have any suitable circumferentially pumping vanes indicated at 52 provided on the face thereof adjacent to the inlet 53 for the pump 48.
  • Such inlet 53 is directly axially associated with and positioned immediately adjacent the discharge face or surface of the impeller 42.
  • the inlet is annular and is aligned with the axial flow of the pumped liquid provided by the axial flow inducer impeller 42.
  • a conventional outlet 54 is formed in a portion of the housing means 12 and an outlet pipe 56 connects thereto for discharge of the pumped material.
  • a submersible type of an electric motor 14 be used in the grinder pump so that the grinder pump can be positioned in a known manner as shown diagrammatically in FIG. 1, in a sump 60.
  • the grinder pump 10 can be positioned in such sump in any conventional manner as being supported on the bottom of the sump by suitable leg or bracket means, or the unit can be positioned on a vertically extending support means of a known type.
  • the inlet 18 faces downwardly of the sump but is spaced from the bottom thereof and the liquid in the sump can rise above the motor 14.
  • Conventional controls would be provided for the motor to drive it upon predetermined depth of liquid received in the sump and for controlling motor drive until a predetermined lower liquid level is obtained in the sump.
  • a pair of axially spaced seal assemblies have been positioned in engagement with the motor shaft 16. These seal assemblies are indicated as a whole by the numbers 62 and 64.
  • a separate housing section 66 is provided as a portion of the housing means 12 and is suitably attached thereto with the section 66 providing a chamber 68 between the seal 62 and 64.
  • a suitable material such as oil, can be received in the chamber 68 and this forms an isolation chamber between the electric motor and the pumped liquid.
  • the seals 62 and 64 can be of any known mechanical type.
  • the axial flow inducer impeller 42 is of a flat disc shape and that the blades or teeth 44 formed thereon can be serviceable with rotation of the impeller in opposite directions.
  • the impeller disc can be removed from the unit of the invention, be turned over and be replaced for further pumping action. This gives a double life on the impeller 42 without any sharpening action being provided or required, so as to reduce maintenance and operation costs of the unit of the invention.
  • the unit of the invention has provided a high rate or volume of forced flow of materials from the grinder pump and at the same time solids in such pumped liquid have been cut or ground to suitable form for passage through the apparatus of the invention.
  • a grinder pump comprising an electric motor means including a shaft extending therefrom, an inlet being provided for said housing, cooperating cutter blade and grinder means members one of which is secured to said shaft at an inlet for the unit, an axial flow inducer impeller positioned axially inwardly of and immediately adjacent said cutter blade member, said impeller being secured to said shaft, and a centrifugal pump means including an impeller secured to said shaft, said pump having an inlet directly connecting to and receiving the discharge from said axial flow inducer impeller.
  • a grinder pump unit as in claim 1 where said axial flow inducer impeller has teeth thereon extending the axial length thereof and surfaces of said teeth cooperate with surfaces of said grinder teeth for additional cutting and/or grinding action.
  • a grinder pump unit comprising a housing and electric motor means, said electric motor including a shaft extending therefrom, an inlet being provided for said housing, an inlet cutter blade secured to said shaft, grinder ring means including grinder teeth carried by said housing and encompassing said inlet cutter blade, an axial flow inducer impeller positioned axially inwardly of and immediately adjacent said inlet cutter blade, said impeller being secured to said shaft, a centrifugal pump means within said housing and including an impeller secured to said shaft, said pump having an inlet directly connecting to and receiving the discharge from said axial flow inducer impeller, and a discharge means for said pump means connecting thereto.
  • a grinder pump unit as in claim 5 where said axial flow inducer impeller has teeth thereon extending the axial length thereof and flat end surfaces are formed on said teeth to cooperate with end surfaces of said grinder ring teeth for additional cutting and/or grinding action.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
US130276A 1971-04-01 1971-04-01 Grinder pump Expired - Lifetime US3650481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13027671A 1971-04-01 1971-04-01

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US3650481A true US3650481A (en) 1972-03-21

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Application Number Title Priority Date Filing Date
US130276A Expired - Lifetime US3650481A (en) 1971-04-01 1971-04-01 Grinder pump

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US (1) US3650481A (enrdf_load_stackoverflow)
JP (1) JPS5035258B1 (enrdf_load_stackoverflow)
CA (1) CA953696A (enrdf_load_stackoverflow)
DE (1) DE2164885C2 (enrdf_load_stackoverflow)
IT (1) IT954374B (enrdf_load_stackoverflow)

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897013A (en) * 1971-12-17 1975-07-29 Silverson Machines Ltd Disintegrated devices
US3961758A (en) * 1974-08-23 1976-06-08 Peabody Barnes, Inc. Centrifugal pump with integral grinder
DE2553823A1 (de) * 1975-11-29 1977-06-08 Albert Blum Abwasserpumpe
DE2612910A1 (de) * 1976-03-26 1977-09-29 Albert Blum Abwasserpumpe
US4108386A (en) * 1977-04-13 1978-08-22 Mcneil Corporation Grinder pump
US4141510A (en) * 1977-06-15 1979-02-27 Arthur Smith Material reduction means for pumps
FR2525693A1 (fr) * 1982-04-21 1983-10-28 Gen Electric Procede et dispositif de degradation de carburant
US4454993A (en) * 1981-08-29 1984-06-19 Ebara Corporation Grinder pump
US4697746A (en) * 1984-08-17 1987-10-06 Ebara Corporation Grinder pump
US5016825A (en) * 1990-02-14 1991-05-21 Mcneil (Ohio) Corporation Grinding impeller assembly for a grinder pump
US5044566A (en) * 1989-12-27 1991-09-03 General Signal Corporation Sewage pump with self-adjusting cutters
DE4128281A1 (de) * 1991-08-27 1993-03-04 Abs Pumpen Ag Pumpenaggregat
US5413460A (en) * 1993-06-17 1995-05-09 Goulds Pumps, Incorporated Centrifugal pump for pumping fiber suspensions
DE19717300A1 (de) * 1997-04-24 1998-10-29 Klein Schanzlin & Becker Ag Gehäuse oder Gehäuseteil für eine Propellerpumpe
RU2152540C1 (ru) * 1997-11-26 2000-07-10 Муниципальное предприятие "РЕМСТРОЙБЛАГОУСТРОЙСТВО" Центробежный насос для перекачивания и размола строительного материала
US6241470B1 (en) * 1996-06-11 2001-06-05 Sweepax International Limited Rotodynamic pump
US20030209616A1 (en) * 2002-05-11 2003-11-13 Moore Roger R. Pump and grinder assembly for use with a steam producing device
WO2005035447A3 (en) * 2003-10-14 2005-07-28 Crane Pumps & Systems Inc Two stage sewage grinder pump
US20050224610A1 (en) * 2004-01-13 2005-10-13 Egan John J Iii Pulper rotor and assembly
US20060060685A1 (en) * 2004-09-17 2006-03-23 Crane Pumps Grinder pump system
US7159806B1 (en) 2005-01-18 2007-01-09 Ritsema Stephen T Cutter assembly for a grinder pump
US20070101484A1 (en) * 2005-11-07 2007-05-10 Mehta Vinod K Non-clog shredder
US20070125893A1 (en) * 2005-05-25 2007-06-07 Shaw James G Cutting ring element for a centrifugal chopper pump
US7237736B1 (en) * 2005-12-05 2007-07-03 Little Giant Pump Company Grinder pump with self aligning cutter assembly
US20130270375A1 (en) * 2009-06-23 2013-10-17 Zoeller Pump Company, Llc Grinder pump basin system
US20130280107A1 (en) * 2010-12-22 2013-10-24 Herborner Pumpenfabrik J.H. Hoffmann GmbH & Co., KG Pump device
US8784038B2 (en) 2011-10-26 2014-07-22 Alfredo A. Ciotola Cutter assembly and high volume submersible shredder pump
US20150152869A1 (en) * 2013-11-29 2015-06-04 Guenter Strelow Grinder pump
US9475059B2 (en) 2013-03-15 2016-10-25 Pentair Flow Technologies, Llc Cutting blade assembly
US20170114790A1 (en) * 2015-10-22 2017-04-27 Liberty Pumps Inc. Shaft seals and liquid pump comprising same
US20170321701A1 (en) * 2013-01-11 2017-11-09 Liberty Pumps, Inc. Liquid pump
CN109458346A (zh) * 2018-11-05 2019-03-12 张家界天成机电设备制造有限公司 一种具有前置磨料功能的耐磨性型渣浆泵
US10287853B2 (en) * 2017-08-30 2019-05-14 Saudi Arabian Oil Company Well debris handling system
EP3492749A1 (en) * 2017-12-04 2019-06-05 Sulzer Management AG Shredding assembly for a grinder pump and centrifugal grinder pump
US10364821B2 (en) 2017-01-16 2019-07-30 Liberty Pumps, Inc. Grinder pump and cutting assembly thereof
US11161121B2 (en) 2019-05-10 2021-11-02 Jung Pumpen Gmbh Cutting blade assembly
US11365738B2 (en) 2019-04-09 2022-06-21 Zoeller Pump Company, Llc Reversing grinder pump
US11396023B1 (en) 2021-10-07 2022-07-26 Alfredo A. Ciotola Dual cutter assembly and submersible shredder pump having a dual cutter assembly
US11560894B2 (en) 2016-04-26 2023-01-24 Pentair Flow Technologies, Llc Cutting assembly for a chopper pump
US20240271633A1 (en) * 2023-02-13 2024-08-15 The Gorman-Rupp Company Explosion proof motor, pump system, and method
US12097504B1 (en) * 2024-02-07 2024-09-24 Alfredo A. Ciotola Externally serrated rotary shredder and submersible shredder pump having an externally serrated rotary shredder

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DE3247306A1 (de) * 1982-12-21 1984-06-28 Sumskij filial Char'kovskogo politechničeskogo instituta imeni V.I. Lenina, Sumy Anlage zur homogenisierung schwebstoffhaltiger fluessigkeiten
DE20114891U1 (de) 2001-09-10 2001-11-15 Grundfos A/S, Bjerringbro Abwasserkreiselpumpe

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US2714045A (en) * 1953-03-05 1955-07-26 Dow Chemical Co Seal for high speed rotary shafts
US2853249A (en) * 1955-06-10 1958-09-23 Pump Suppliers Inc Garbage grinder and disposer
US2857109A (en) * 1956-06-08 1958-10-21 Apsco Products Inc Portable garbage disposal unit
US3128051A (en) * 1960-11-07 1964-04-07 Dag Mfg Co Pump

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897013A (en) * 1971-12-17 1975-07-29 Silverson Machines Ltd Disintegrated devices
US3961758A (en) * 1974-08-23 1976-06-08 Peabody Barnes, Inc. Centrifugal pump with integral grinder
DE2553823A1 (de) * 1975-11-29 1977-06-08 Albert Blum Abwasserpumpe
DE2612910A1 (de) * 1976-03-26 1977-09-29 Albert Blum Abwasserpumpe
US4108386A (en) * 1977-04-13 1978-08-22 Mcneil Corporation Grinder pump
US4141510A (en) * 1977-06-15 1979-02-27 Arthur Smith Material reduction means for pumps
US4454993A (en) * 1981-08-29 1984-06-19 Ebara Corporation Grinder pump
FR2525693A1 (fr) * 1982-04-21 1983-10-28 Gen Electric Procede et dispositif de degradation de carburant
US4697746A (en) * 1984-08-17 1987-10-06 Ebara Corporation Grinder pump
US5044566A (en) * 1989-12-27 1991-09-03 General Signal Corporation Sewage pump with self-adjusting cutters
US5016825A (en) * 1990-02-14 1991-05-21 Mcneil (Ohio) Corporation Grinding impeller assembly for a grinder pump
DE4128281A1 (de) * 1991-08-27 1993-03-04 Abs Pumpen Ag Pumpenaggregat
US5413460A (en) * 1993-06-17 1995-05-09 Goulds Pumps, Incorporated Centrifugal pump for pumping fiber suspensions
US6241470B1 (en) * 1996-06-11 2001-06-05 Sweepax International Limited Rotodynamic pump
US6447245B1 (en) 1996-06-11 2002-09-10 Sweepax International Limited Rotodynamic pump
DE19717300A1 (de) * 1997-04-24 1998-10-29 Klein Schanzlin & Becker Ag Gehäuse oder Gehäuseteil für eine Propellerpumpe
US6042332A (en) * 1997-04-24 2000-03-28 Ksb Aktiengesellschaft Housing part for a propeller pump
RU2152540C1 (ru) * 1997-11-26 2000-07-10 Муниципальное предприятие "РЕМСТРОЙБЛАГОУСТРОЙСТВО" Центробежный насос для перекачивания и размола строительного материала
US6708910B2 (en) * 2002-05-11 2004-03-23 Delaware Capital Formation, Inc. Pump and grinder assembly for use with a steam producing device
US20030209616A1 (en) * 2002-05-11 2003-11-13 Moore Roger R. Pump and grinder assembly for use with a steam producing device
WO2005035447A3 (en) * 2003-10-14 2005-07-28 Crane Pumps & Systems Inc Two stage sewage grinder pump
US20070069050A1 (en) * 2003-10-14 2007-03-29 Crane Pumps & Systems, Inc. Two stage sewage grinder pump
US7357341B2 (en) 2003-10-14 2008-04-15 Crane Pumps & Systems, Inc. Two stage sewage grinder pump
US20050224610A1 (en) * 2004-01-13 2005-10-13 Egan John J Iii Pulper rotor and assembly
US20060060685A1 (en) * 2004-09-17 2006-03-23 Crane Pumps Grinder pump system
US7159806B1 (en) 2005-01-18 2007-01-09 Ritsema Stephen T Cutter assembly for a grinder pump
US20070125893A1 (en) * 2005-05-25 2007-06-07 Shaw James G Cutting ring element for a centrifugal chopper pump
US7712158B2 (en) * 2005-11-07 2010-05-11 Vinod Kumar Mehta Non-clog shredder
US20070101484A1 (en) * 2005-11-07 2007-05-10 Mehta Vinod K Non-clog shredder
US7237736B1 (en) * 2005-12-05 2007-07-03 Little Giant Pump Company Grinder pump with self aligning cutter assembly
US20130270375A1 (en) * 2009-06-23 2013-10-17 Zoeller Pump Company, Llc Grinder pump basin system
US9352327B2 (en) * 2009-06-23 2016-05-31 Zoeller Pump Company, Llc Grinder pump basin system
US20130280107A1 (en) * 2010-12-22 2013-10-24 Herborner Pumpenfabrik J.H. Hoffmann GmbH & Co., KG Pump device
US10301001B2 (en) * 2010-12-22 2019-05-28 Herborner Pumpenfabrik J.H. Hoffman Gmbh & Co. Kg Pump device
US8784038B2 (en) 2011-10-26 2014-07-22 Alfredo A. Ciotola Cutter assembly and high volume submersible shredder pump
US20170321701A1 (en) * 2013-01-11 2017-11-09 Liberty Pumps, Inc. Liquid pump
US10267312B2 (en) * 2013-01-11 2019-04-23 Liberty Pumps, Inc. Liquid pump
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Also Published As

Publication number Publication date
JPS5035258B1 (enrdf_load_stackoverflow) 1975-11-14
DE2164885C2 (de) 1984-06-14
DE2164885A1 (de) 1972-10-19
IT954374B (it) 1973-08-30
CA953696A (en) 1974-08-27

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