EP3548749B1 - Cutter pump with quick-assembly cutting unit and impeller - Google Patents
Cutter pump with quick-assembly cutting unit and impeller Download PDFInfo
- Publication number
- EP3548749B1 EP3548749B1 EP17817150.0A EP17817150A EP3548749B1 EP 3548749 B1 EP3548749 B1 EP 3548749B1 EP 17817150 A EP17817150 A EP 17817150A EP 3548749 B1 EP3548749 B1 EP 3548749B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- cutting blade
- cutting
- shaft
- pump body
- 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.)
- Active
Links
- 239000007788 liquid Substances 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000011343 solid material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/622—Adjusting the clearances between rotary and stationary parts
-
- 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
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
- B02C2201/063—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage for waste water or sewage
Definitions
- the present patent concerns cutter pumps, and in particular it concerns a cutter pump with quick-assembly cutting unit and impeller.
- These pumps commonly called cutter pumps, are equipped with a cutting unit which is installed on the suction side of the pump and serves the function of cutting the solid materials contained in the liquid in order to reduce said solid material to such a size as to allow it to pass through the pump without causing any clogging.
- the cutting unit is constituted by a rotary cutting blade, which is mounted so that it is coaxial with the impeller of the pump and rotates together with it, and a cutting plate which is fixed with respect to the pump body and is mounted between the cutting blade and the impeller, and wherein the cutting interface is defined between said rotary cutting blade and said cutting plate.
- the liquid to be transported flows according to an axial suction direction, passes through the cutting unit and then is discharged through the outlet duct in radial direction.
- the cutting efficiency is determined by the clearance between the cutting blade and the cutting plate.
- Several types of cutter pump are known, which are provided with devices suited to adjust said clearance and lock the cutting unit in the desired position.
- pumps are known where said adjustment takes place during the assembly phase, through the insertion of spacer washers in the driving shaft, between the impeller and the cutting blade, and the successive adjustment of the position of the cutting plate with respect to the pump body.
- the correctness of this adjustment operation depends on the skills and expertise of the operator and cannot be reproduced exactly.
- cutter pumps of the type described in patent EP2147213 are also known, in which said adjustment operation is carried out by means of additional threaded screws inserted in the correspondingly threaded end of the shaft, upstream of the cutting blade with respect to the suction direction, and in which said cutting blade is in turn screwed onto the driving shaft.
- document JP 2 843270 B2 discloses a cutter pump.
- the driving shaft in particular, is made up of two portions that can be screwed onto each other, wherein one portion is mechanically fitted into a blind hole provided in said impeller, while the other portion is threaded externally, so that it can be engaged into a correspondingly threaded through axial opening provided in said cutting blade.
- the main object of the present invention is to improve the known cutter pumps by simplifying and quickening the assembly of the cutter unit, in addition to reducing the number of its components.
- the new cutter pump comprises a pump body, an impeller mounted on a driving shaft and rotating inside a housing created in said pump body and a cutting unit mounted so that it is coaxial with said impeller.
- Said cutting unit comprises a rotary cutting blade, mounted in such a way that it is coaxial with said impeller and rotates together with it, being conveniently mounted on the same shaft as said impeller, and a cutting plate rigidly mounted on the pump body, and wherein said rotary cutting blade and said non-rotating cutting plate cooperate with each other and define the cutting interface.
- Said cutting plate mounted between said impeller and said cutting blade, comprises a centre opening at the level of the impeller shaft and is rigidly constrained to the pump body, for example bolted onto it.
- Said impeller and said cutting blade are both constrained to said shaft so that they rotate integrally with it, for example and conveniently through a mechanical connection with at least one fixing tab or key.
- the new pump is provided with at least one self-locking nut suited to be screwed to the end of the shaft that projects from the cutting blade upstream of the latter with respect to the liquid suction direction.
- said cutting plate in order to regulate the cutting efficiency, can be translated axially, so that it is possible to vary its distance from said cutting blade, while on the other hand the position of the latter with respect to the impeller cannot be changed.
- Figure 1 shows a longitudinal axial section view of the pump (10) when it is completely assembled.
- Figure 2 shows part of a further longitudinal axial section view, different from the previous one, of the pump (10) when it is completely assembled.
- Figure 3 shows a view of the suction side of the pump (10) when it is completely assembled.
- the new cutter pump (10) comprises a pump body (14) provided with at least one housing (11) with an impeller (20) rotating therein.
- Said impeller (20) is mounted on a driving shaft (30) and rotates around the axis (X) of the shaft (30) inside said housing (11) created in said pump body (14).
- said impeller (21) comprises a through axial opening (21) suitable for the insertion of said shaft (30).
- Said housing (11) comprises a suction intake (12) which is substantially axial with respect to the impeller (20) and an outlet (13) intended to discharge the fluid in a substantially radial direction.
- the transported liquid thus flows in axial direction during the suction phase and in radial direction during the delivery phase.
- a cutting unit (40) is mounted coaxially with said impeller (30), upstream of said suction intake (12), so that the liquid to be transported flows through it before reaching said housing (11).
- Said cutting unit (40) comprises a rotary cutting blade (50) mounted on said driving shaft (30) in such a way that it is coaxial with said impeller (20) and rotates together with it.
- Said cutting blade (50) comprises a through axial opening (51) suitable for the insertion of the driving shaft (30) and one or more substantially radial cutting elements (52).
- Said cutting unit (40) comprises also a cutting plate (60) mounted between said impeller (20) and said cutting blade (50) and rigidly constrained to the pump body (14), for example bolted onto the latter (62).
- Said cutting plate (60) comprises a centre opening (61) and the driving shaft (30) passes through the latter.
- Said cutting blade (50) rotates with respect to said cutting plate (60), and said cutting blade (50) and said cutting plate (60) cooperate with each other defining the cutting interface (T) through which the liquid flows and in which the solid elements transported by the liquid are cut.
- Said impeller (20) and said cutting blade (50) are constrained to said shaft (30) in such a way that they rotate integrally with it and with each other, for example and conveniently through the same fixing tab or key (32).
- said impeller (20) and said cutting blade (50) are mechanically connected to each other and to said shaft (30) through a single tab (32) inserted between said shaft (30) and said axial non-threaded openings (21, 51) of said impeller (20) and of said cutting blade (50).
- said impeller (20), said cutting blade (50) and said shaft (30) make up a single body.
- said cutting blade (50) and said impeller (20) are maintained in contact with and abutting against each other through said opening (61) created in said cutting plate (60), thanks to the tightening force of said nut (70).
- said impeller (20) comprises an annular portion (22) in which said shaft (30) is inserted and which projects from the impeller (20) towards said cutting blade (50), and wherein said annular portion (22) of the impeller (20) is maintained in contact with said cutting blade (50).
- Said cutting blade (50) conveniently comprises an annular portion (53) in which said shaft (30) is inserted and which projects from said cutting blade (50) towards said impeller (20), and wherein said annular portion (53) of the cutting blade (50) is maintained in contact with said annular portion (22) of the impeller (20).
- said cutting plate (60) can be moved axially in such a way as to adjust its distance from said cutting blade (50), which instead remains constrained to said shaft (30) and to said impeller (20) in a fixed manner.
- said pump body (14) comprises at least one fixed portion (16) and at least one adjusting portion (15) to which said cutting plate (60) is rigidly constrained, for example through fixing means (62).
- Said adjusting portion (15) can be rigidly constrained to said fixed portion (16) through fixing means (151), wherein adjustable spacer elements are positioned between said fixed portion (16) and said adjusting portion (15), for example one or more threaded dowels (17) which are distributed homogeneously and engaged in correspondingly threaded seats (152) created in said adjusting portion (15).
Landscapes
- 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)
Description
- The present patent concerns cutter pumps, and in particular it concerns a cutter pump with quick-assembly cutting unit and impeller.
- Pumps are known, which are intended for transporting liquids that contain solid materials, which happens quite often, for example, in the case of rainwater containing leaves and other solid and coarse material.
- These pumps, commonly called cutter pumps, are equipped with a cutting unit which is installed on the suction side of the pump and serves the function of cutting the solid materials contained in the liquid in order to reduce said solid material to such a size as to allow it to pass through the pump without causing any clogging.
- The cutting unit is constituted by a rotary cutting blade, which is mounted so that it is coaxial with the impeller of the pump and rotates together with it, and a cutting plate which is fixed with respect to the pump body and is mounted between the cutting blade and the impeller, and wherein the cutting interface is defined between said rotary cutting blade and said cutting plate.
- The liquid to be transported flows according to an axial suction direction, passes through the cutting unit and then is discharged through the outlet duct in radial direction.
- The cutting efficiency is determined by the clearance between the cutting blade and the cutting plate. Several types of cutter pump are known, which are provided with devices suited to adjust said clearance and lock the cutting unit in the desired position.
- For example, pumps are known where said adjustment takes place during the assembly phase, through the insertion of spacer washers in the driving shaft, between the impeller and the cutting blade, and the successive adjustment of the position of the cutting plate with respect to the pump body. The correctness of this adjustment operation depends on the skills and expertise of the operator and cannot be reproduced exactly.
- For example, cutter pumps of the type described in patent
EP2147213 are also known, in which said adjustment operation is carried out by means of additional threaded screws inserted in the correspondingly threaded end of the shaft, upstream of the cutting blade with respect to the suction direction, and in which said cutting blade is in turn screwed onto the driving shaft. Also documentJP 2 843270 B2 - The driving shaft, in particular, is made up of two portions that can be screwed onto each other, wherein one portion is mechanically fitted into a blind hole provided in said impeller, while the other portion is threaded externally, so that it can be engaged into a correspondingly threaded through axial opening provided in said cutting blade.
- Even if this type of pump satisfactorily allows the clearance of the cutting unit to be adjusted in a repeatable way, it is rather complex to assemble and furthermore the correct operation of the adjusting system depends on the precision with which said components are made and assembled.
- In order to overcome all of the drawbacks described above, a new type of cutter pump with quick-assembly cutting unit and impeller has been designed and constructed.
- The main object of the present invention is to improve the known cutter pumps by simplifying and quickening the assembly of the cutter unit, in addition to reducing the number of its components.
- It is another object of the present invention to simplify the operations intended to adjust the cutting efficiency.
- The new cutter pump comprises a pump body, an impeller mounted on a driving shaft and rotating inside a housing created in said pump body and a cutting unit mounted so that it is coaxial with said impeller.
- Said cutting unit comprises a rotary cutting blade, mounted in such a way that it is coaxial with said impeller and rotates together with it, being conveniently mounted on the same shaft as said impeller, and a cutting plate rigidly mounted on the pump body, and wherein said rotary cutting blade and said non-rotating cutting plate cooperate with each other and define the cutting interface.
- Said cutting plate, mounted between said impeller and said cutting blade, comprises a centre opening at the level of the impeller shaft and is rigidly constrained to the pump body, for example bolted onto it.
- Said impeller and said cutting blade are both constrained to said shaft so that they rotate integrally with it, for example and conveniently through a mechanical connection with at least one fixing tab or key.
- In order to prevent the cutting blade from coming off the shaft and to lock it in position with respect to the cutting plate, the new pump is provided with at least one self-locking nut suited to be screwed to the end of the shaft that projects from the cutting blade upstream of the latter with respect to the liquid suction direction. According to the invention, in order to regulate the cutting efficiency, said cutting plate can be translated axially, so that it is possible to vary its distance from said cutting blade, while on the other hand the position of the latter with respect to the impeller cannot be changed.
- The characteristics of the new cutter pump are highlighted in greater detail in the following description, making reference to the drawings which are attached hereto by way of non-limiting example.
-
Figure 1 shows a longitudinal axial section view of the pump (10) when it is completely assembled. -
Figure 2 shows part of a further longitudinal axial section view, different from the previous one, of the pump (10) when it is completely assembled. -
Figure 3 shows a view of the suction side of the pump (10) when it is completely assembled. - The new cutter pump (10) comprises a pump body (14) provided with at least one housing (11) with an impeller (20) rotating therein.
- Said impeller (20) is mounted on a driving shaft (30) and rotates around the axis (X) of the shaft (30) inside said housing (11) created in said pump body (14). In particular, said impeller (21) comprises a through axial opening (21) suitable for the insertion of said shaft (30).
- Said housing (11) comprises a suction intake (12) which is substantially axial with respect to the impeller (20) and an outlet (13) intended to discharge the fluid in a substantially radial direction.
- The transported liquid thus flows in axial direction during the suction phase and in radial direction during the delivery phase.
- A cutting unit (40) is mounted coaxially with said impeller (30), upstream of said suction intake (12), so that the liquid to be transported flows through it before reaching said housing (11).
- Said cutting unit (40) comprises a rotary cutting blade (50) mounted on said driving shaft (30) in such a way that it is coaxial with said impeller (20) and rotates together with it. Said cutting blade (50) comprises a through axial opening (51) suitable for the insertion of the driving shaft (30) and one or more substantially radial cutting elements (52).
- Said cutting unit (40) comprises also a cutting plate (60) mounted between said impeller (20) and said cutting blade (50) and rigidly constrained to the pump body (14), for example bolted onto the latter (62).
- Said cutting plate (60) comprises a centre opening (61) and the driving shaft (30) passes through the latter.
- Said cutting blade (50) rotates with respect to said cutting plate (60), and said cutting blade (50) and said cutting plate (60) cooperate with each other defining the cutting interface (T) through which the liquid flows and in which the solid elements transported by the liquid are cut.
- Said impeller (20) and said cutting blade (50) are constrained to said shaft (30) in such a way that they rotate integrally with it and with each other, for example and conveniently through the same fixing tab or key (32). In particular, said impeller (20) and said cutting blade (50) are mechanically connected to each other and to said shaft (30) through a single tab (32) inserted between said shaft (30) and said axial non-threaded openings (21, 51) of said impeller (20) and of said cutting blade (50).
- In practice, said impeller (20), said cutting blade (50) and said shaft (30) make up a single body.
- The end (31) of said driving shaft (30) that projects through said opening (51) of said cutting blade (50) is threaded externally, so that a nut (70), conveniently of the self-locking type with the respective washer (71), can be screwed thereon in such a way as to lock the cutting blade (50) and the impeller (20) on the shaft (30).
- In particular, said cutting blade (50) and said impeller (20) are maintained in contact with and abutting against each other through said opening (61) created in said cutting plate (60), thanks to the tightening force of said nut (70).
- In the preferred solution, said impeller (20) comprises an annular portion (22) in which said shaft (30) is inserted and which projects from the impeller (20) towards said cutting blade (50), and wherein said annular portion (22) of the impeller (20) is maintained in contact with said cutting blade (50).
- Said cutting blade (50) conveniently comprises an annular portion (53) in which said shaft (30) is inserted and which projects from said cutting blade (50) towards said impeller (20), and wherein said annular portion (53) of the cutting blade (50) is maintained in contact with said annular portion (22) of the impeller (20).
- With reference to
Figures 2 and3 , in a possible embodiment of the invention said cutting plate (60) can be moved axially in such a way as to adjust its distance from said cutting blade (50), which instead remains constrained to said shaft (30) and to said impeller (20) in a fixed manner. - In particular, said pump body (14) comprises at least one fixed portion (16) and at least one adjusting portion (15) to which said cutting plate (60) is rigidly constrained, for example through fixing means (62).
- Said adjusting portion (15) can be rigidly constrained to said fixed portion (16) through fixing means (151), wherein adjustable spacer elements are positioned between said fixed portion (16) and said adjusting portion (15), for example one or more threaded dowels (17) which are distributed homogeneously and engaged in correspondingly threaded seats (152) created in said adjusting portion (15).
- Said adjustable spacer elements or dowels (17), which abut on a point (161) against said fixed portion (16), are therefore screwed to a larger or smaller extent into said adjusting portion (15), thus determining the position of said adjusting portion (15) itself with respect to said fixed portion (16) of the pump body (14), and consequently determining also the position of said cutting plate (60) with respect to said cutting blade (50), that is, determining the cutting efficiency.
- Therefore, with reference to the above description and the attached drawings, the following claims are expressed.
Claims (1)
- Cutter pump comprising a pump body (14), an impeller (20) mounted on a driving shaft (30) and rotating inside a housing (11) provided in said pump body (14), a cutting unit (40) mounted coaxially with said impeller (20) and in turn comprising a cutting plate (60) constrained to the pump body (14) and a cutting blade (50) which rotates with respect to said cutting plate (60), mounted so that it is coaxial with said impeller (20) and rotates together with it, and wherein said cutting blade (50) and said cutting plate (60) cooperate with each other so as to define the cutting interface (T) through which the liquid to be transported is intended to flow, and wherein said cutting blade (50) comprises a through axial opening (51) which is not threaded and is suitable for the insertion of said shaft (30), and said impeller (20) comprises a through axial opening (21) for the insertion of said shaft (30), characterized in that said cutting blade (50) and said impeller (30) are mechanically connected to each other and to said shaft (30) by means of a single tab (32) inserted between said shaft (30) and said axial openings (21, 51) of said impeller (20) and of said cutting blade (50), in such a way that they rotate integrally with each other and with said shaft (30) itself,and wherein one end (31) of said driving shaft (30) projects upstream of the cutting blade (50), said end (31) being threaded externally so as to allow at least one nut (70) to be screwed thereon, said nut being suited to lock said cutting blade (50) and said impeller (20) onto said shaft (30),and wherein said cutting plate (60) is mounted between said impeller (20) and said cutting blade (50) and comprises a centre opening (61) at the level of the driving shaft (30) of the impeller (20), through which said cutting blade (50) and said impeller (20) come into contact with each other, and wherein said cutting blade (50) and said impeller (20) abut against each other thanks to the tightening action of said at least one nut (70), and whereinsaid cutting plate (60) is suited to be constrained to said pump body (14) at a selectable distance from said cutting blade (50), and whereinsaid pump body (14) comprises at least one fixed portion (16) and at least one adjusting portion (15) to which said cutting plate (60) is rigidly constrained, said adjusting portion (15) being suited to be rigidly constrained to said fixed portion (16) through fixing means (151), and wherein between said fixed portion (16) and said adjusting portion (15) there are adjustable spacer elements suited to selectively vary the position of said adjusting portion (15) with respect to said fixed portion (16) of the pump body (14), thus determining also the position of said cutting plate (60) with respect to said cutting blade (50), and whereinsaid adjustable spacer elements comprise one or more threaded dowels (17) which are distributed homogeneously and abut against said fixed portion (16) and are engaged in correspondingly threaded seats (152) created in said adjusting portion (15), and wherein screwing said dowels (17) more or less into said adjusting portion (15) determines the position of said adjusting portion (15) itself with respect to said fixed portion (16).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102016000122865A IT201600122865A1 (en) | 2016-12-02 | 2016-12-02 | SHAVING PUMP WITH CUTTING UNIT AND RAPID ASSEMBLY IMPELLER |
PCT/IB2017/057445 WO2018100488A1 (en) | 2016-12-02 | 2017-11-28 | Cutter pump with quick-assembly cutting unit and impeller |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3548749A1 EP3548749A1 (en) | 2019-10-09 |
EP3548749B1 true EP3548749B1 (en) | 2024-04-10 |
EP3548749C0 EP3548749C0 (en) | 2024-04-10 |
Family
ID=58402042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17817150.0A Active EP3548749B1 (en) | 2016-12-02 | 2017-11-28 | Cutter pump with quick-assembly cutting unit and impeller |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3548749B1 (en) |
IT (1) | IT201600122865A1 (en) |
WO (1) | WO2018100488A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9475059B2 (en) | 2013-03-15 | 2016-10-25 | Pentair Flow Technologies, Llc | Cutting blade assembly |
WO2017189741A1 (en) | 2016-04-26 | 2017-11-02 | Pentair Flow Technologies, Llc | Cutting assembly for a chopper pump |
US11161121B2 (en) | 2019-05-10 | 2021-11-02 | Jung Pumpen Gmbh | Cutting blade assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5930587U (en) * | 1982-08-20 | 1984-02-25 | 株式会社鶴見製作所 | Contaminant cutting mechanism in submersible pumps |
JPH0636315Y2 (en) * | 1988-06-14 | 1994-09-21 | 三和特珠製綱株式会社 | Centrifugal pump with cutter |
JP2843270B2 (en) * | 1994-11-14 | 1999-01-06 | 小松ゼノア株式会社 | Crushing pump |
FR3006721A1 (en) * | 2013-06-10 | 2014-12-12 | Ksb Sas | DILECERATING PUMP WITH MEANS OF ADJUSTMENT |
-
2016
- 2016-12-02 IT IT102016000122865A patent/IT201600122865A1/en unknown
-
2017
- 2017-11-28 EP EP17817150.0A patent/EP3548749B1/en active Active
- 2017-11-28 WO PCT/IB2017/057445 patent/WO2018100488A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2018100488A1 (en) | 2018-06-07 |
IT201600122865A1 (en) | 2018-06-02 |
EP3548749A1 (en) | 2019-10-09 |
EP3548749C0 (en) | 2024-04-10 |
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