US3075459A - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
- Publication number
- US3075459A US3075459A US36864A US3686460A US3075459A US 3075459 A US3075459 A US 3075459A US 36864 A US36864 A US 36864A US 3686460 A US3686460 A US 3686460A US 3075459 A US3075459 A US 3075459A
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- Prior art keywords
- rotor
- ink
- pump
- centrifugal pump
- hub
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/14—Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis
Definitions
- This invention relates to centrifugal pumps, and more particularly to a centrifugal pump for use in lifting abrasive and/or corrosive liquids a predetermined distance.
- Centrifugal pumps generally have an impeller with radial 0r curved vaned surfaces, the impeller being mounted upon a shaft and housed in a cavity of volute conformation.
- the impeller is necessarily closely fitted in the housing cavity and mounted upon a shaft carried on bearings, while some type of seal means -is generally provided. Rapid wear of the impeller, housing cavity, bearings and seal means will occur when the liquid being pumped is of an abrasive and/or corrosive nature.
- centrifugal pump of the invention may be advantageously used in many applications, it will be found especially well suited for use in certain types of printing presses.
- Pumps generally used for circulating solvent type inks and coatings in the ink fountain of flexographic and gravure printing presses, are costly, involve excessive maintenance due to wear and corrosion of seals and impellcrs, contaminate the ink with lubricant and foreign particles, and require frequent lubrication. Constant circulation of the ink is important for maintaining uniform color and consistency.
- the centrifugal pump of the invention avoids the disadvantages and shortcomings of centrifugal pumps generally used on printing presses. More particularly, the centrifugal pump of the invention incorporates the following feature-s: no close fitting parts, thus eliminating wear; no contact or exposure of the ink to seals, bearings, or lubricants, hence, these elements of the pump, as well as the ink being circulated, are free of contamination; the pump is simple in structure, thus allowing low cost manufacture, and easy assembly and disassembly for cleaning, and, the pump is adaptable for direct mounting upon the ink fountain of a printing press, thereby eliminating hoses, tanks, and buckets generally required by printing press pumps of the prior art.
- the ⁇ centrifugal pump of the invention includes a smooth conical rotor, the upper end of which is closed, and has a plurality of openings about the periphery thereof, while the lower end of the rotor is positioned for irn- -mersion in the ink to be circulated.
- a collector cup is arranged about the upper end of the rotor, which cup has a pitcher spout through which the ink can pass by gravity to an ink fountain of the printing press.
- the pump operates on the simple principle of centrifugal force, whereby rapid rotation of the rotor causes the ink to be lifted upwardly and outwardly through the openings at the upper end of the rotor.
- the pump operates only to lift liquid a given amount; there is no pressurization of the liquid being pumped.
- the volume of liquid to be pumped may be varied by regulating of rotor speed.
- the rotor is preferably rotated by lan air mot-or, when the pump is used in the vicinity of inflammable solvents, such as are commonly used in printing inks.
- the main object of this invention is to provide a centrifugal pump for use in handling abrasive -and/ or corrosive liquids.
- a more specific object lof this invention is to provide a centrifugal pump for handling abrasive and/ or corrosive 2 liquid-s, which pump has no close fitting parts, thus avoiding wear on the operative parts of the pump.
- Another object of this invention is to provide a centrifugal pump for handling abrasive and/ or corrosive liquids wherein the liquid being handled is free from Contact or exposure to seals, bearings, or pump lubricants, thus avoiding contamination of the pump parts, as Well as the liquid being circulated.
- Still another object of this 4invention is to provide a centrifugal pump which eliminates the need for hoses, tanks and lbuckets generally used with pumps when applied upon the ink fountains of certain printing presse-s.
- Another object of this invention is to provide a centrifugal pump which is simple in structure, thus allowing low cost manufacture, and easy assembly and disassembly.
- FIG. l is an elevation View, substantially in cross-section, illustrating a centrifugal pump representing an embodiment of the invention, which pump is shown as applied to a printing press;
- FIG. 2 is a section view generally as seen along line 2-2 in FIG. l.
- the numeral 10 identifies ⁇ a pum-p assemblage which includes -a rotor assembly l2, and a collector cup 14.
- the rotor assembly 12. includes a rot-or in the form of a smooth conical cylindrical member lo which tapers toward an opening at the lower end, the upper end of the rotor being formed to provide a cylindrical enlargement 1S, and a hub member zii which encloses the upper end of the rotor 16 and to which the rotor is securely affixed for vertical suspension.
- the taper of the rotor 16 may be set according to pump, or lifting effect desired; in the disclosed application of the pump, a taper of approximately 5 was found to provide satisfac- 4tory results.
- the main objective is to employ a rotor configuration which will develop a lifting force upon the liquid as the rotor is caused to rotate.
- the lower surface Iof the hub member Ztl is tapered whereby an apex 22 thereof will coincide with the longitudinal centerline of the rotor 16.
- a plurality of equi-spaced holes, or openings 24 are provided in the side Wall of the rotor cylindrical enlargement 18, the upper edge of said openings coinciding with the outer edge of the tapered surface formed on the hub 20.
- the Acollector cup 14 is formed to provide a flanged hole 26, the flange thereof extending upwardly and in spaced relation to the exterior of the rotor 16.
- a side portion of the collector cup is formed to provide a pitcher spout 28, which extends outwardly from the wall of the collector cup to provide an opening 30 which is co-extensive with the lower surface of the collector cup.
- a closure ring, or cover means 32 is securely affixed to the collector cup 1d at the upper end thereof, which closure ring is adapted to support a motor means assembly 34.
- the motor assembly 34 includes a shaft 35, to which is secured a hub 3S adapted to receive in snug engagement, the rotor hub member Zit.
- Holding means such as set screws riti may be used to secure the hub member 2i? to the hub 38.
- the motor means 34 may be of any type as wiil provide high speed rotation of the shaft 36, however', when the centrifugal pump of the invention is being used to handle inflammable, or explosive liquids, the use of an explosion proof motor, such as an air motor would naturally be recommended. ln the illustrated arrangement, an air motor 42 is utilized which is supplied with compressed air via a conduit, or pipe arrangement 44.
- centrifugal pump of the invention will be found to be extremely well suited for many applications, especially wherein the liquid to be handled is of an abrasive and/or corrosive nature, it will be described as applied to a printing press for circulating Vsolvent type inks andv coatings, as used in flexographic and gravure Vprinting, As seen in FIG. 1, a pair of inlcing rolls, or rollers 46 and are arranged in rolling engagement, while a panmeansl -is supported beneath the ink rolls by a pairof rod means 52, 54.
- the pan means 5d includes an ink fountain portion 56, and a sump portion 5S.
- fountain portion 56 is adapted for maintenance of print ing inlr at av constant level to assure a steady supply of ink'to the roll 43 which is partially immersed therein.v Any ink supply to the fountain 56 in excess of predetermined requirements will flow into the sump portion 58,
- the pump assemblage 1t) is aiixed to an adjustable mounting bracket assemblage 60 which is clamped upon the pan means Si? so that the lower end of the rotor 16 is'immersedin the ink supply in the sump portion St?,
- a shield in the form of a cylindrical tube 62 may be aflixed to the bracket assemblyinconcentricspaced relation to the rotor 16, which shield 62 extends downwardly a given distance below the surfaceof the' ink-in thesumpportion 5S.
- centrifugal pump of the invention is-extremelysimple fonthe pumping andcirculatingof printing ink.
- the pump operateson the simple. principle of centrifugalforce; rapid rotation of the rotor 16 causes the; inlei to be lifted upwardlywithinthe rotor and ⁇ discharged lor expelled 'radiallythrough the rotor openingsf.
- centrifugal pumpof the invention may be used to realize. ally of v the objectives set forth in the early partof this y disclosure.
- a .centrifugal pump for raising liquids including, a hollow rotor having a smooth interiorV surface which tapers toward an opening at the lower extremity, , a hub ⁇ means attheupper extremity of the rotor, said hub means being arranged .forthevertical suspension of said rotor,V
- a centrifugal pump for raising liquids including,
- a smooth interiorV hollow conical rotor tapering toward an opening at the lower extremity and having a cylindrical enlargement at the opposite extremity, a hub meanssecuredI to and enclosing said cylindrical enlargement and being narranged for the vertical suspension of the rotor,
- said rotor being formed to provide openings adjacent said hub means to allow radial discharge of liquid raised upwardly within the rotor due to rotation thereof, and a collector cup surrounding the upper end of said rotor for receiving the liquid discharged from said openings, said collector cup being formed to provide a flanged opening for receiving in spaced relation said rotor and being further formed to provide an opening to allow egress of liq uid from the collector cup.
- a centrifugal pump for raising liquids including, a smooth interior hollow .conical rotor tapering toward an opening at the lower extremity and having a cylindrical enlargementat the opposite extremity, a hub means secured to and enclosingsaid cylindrical venlargeafnent and being arranged for the vertical suspension of the rotor,
- said rotor being formed to provide a plurality of openings adjacent said hub means to allow radial discharge of liquid raised upwardly within the rotor due to rotation thereof, a collector cup surrounding the upper end of said from the collector cup, and a covermeans for said col-- lector cup, said cover-means being arranged for support of a motor means'operable for rotation of said rotor.v
- a printing press roll-inking Yarrangement comprising in combination, an inkingl roller, a constant level ink fountain .which formspart of a pan means including a sump portion which receives overflow inkfrom the ink'- fountain, a rotor assembly including al smooth interiorhollow ⁇ conical rotor. tapering toward an opening at the lower extremityandnhaving acylindrical enlargement at the opposite extremity, a hub means secured to and enclosing saidecylindrical enlargement-and being arrangedY for thevertical suspension of the rotor, said.
- rotorbeing formedto provide .a plurality of openings adjacent said hubmeanstoallow radial discharge of liquid raised upwardly within therotor due to rotation thereof, acollector cup surrounding the upper end of said rotor for receiving the ,liquiddischarged fromsaidopenings, said collector cup being formed to provide a flanged*k opening in spacedrelation lto saidrotor, the flange of said opening extendingupwardly, saidcollector. cup being furtherarranged vto vprovide a pitcher spout having f an .opening whichis positionedl above the ink fountain, and a bracket meansgfor ⁇ supporting the centrifugal pump assemblage so that the lower end of the rotor will .be immersed. in a body of inkin thesurnp portion.,
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
3,@lA-59 Patented dan. 29, 1963 3,675,459 CENTRFUGAL PUMP Russell L. Hoeizer, Fairview Park, and George I. Schmidt,
Cleveland, Ghia, assignors to The Dow Chemical Ccmpany, Midland, Mich., a corporation of Delaware Fiied .lune 17, 196), Ser. No. 36,864 6 Claims. (Cl. lill-366) This invention relates to centrifugal pumps, and more particularly to a centrifugal pump for use in lifting abrasive and/or corrosive liquids a predetermined distance.
Centrifugal pumps generally have an impeller with radial 0r curved vaned surfaces, the impeller being mounted upon a shaft and housed in a cavity of volute conformation. The impeller is necessarily closely fitted in the housing cavity and mounted upon a shaft carried on bearings, while some type of seal means -is generally provided. Rapid wear of the impeller, housing cavity, bearings and seal means will occur when the liquid being pumped is of an abrasive and/or corrosive nature. In addition, it is impossible to keep the bearings and seal means adequately lubricated :because solvents contained in the liquid being pumped, wash away the lubricants, which also can contaminate the liquid being pumped.
While the centrifugal pump of the invention may be advantageously used in many applications, it will be found especially well suited for use in certain types of printing presses. Pumps generally used for circulating solvent type inks and coatings in the ink fountain of flexographic and gravure printing presses, are costly, involve excessive maintenance due to wear and corrosion of seals and impellcrs, contaminate the ink with lubricant and foreign particles, and require frequent lubrication. Constant circulation of the ink is important for maintaining uniform color and consistency.
The centrifugal pump of the invention avoids the disadvantages and shortcomings of centrifugal pumps generally used on printing presses. More particularly, the centrifugal pump of the invention incorporates the following feature-s: no close fitting parts, thus eliminating wear; no contact or exposure of the ink to seals, bearings, or lubricants, hence, these elements of the pump, as well as the ink being circulated, are free of contamination; the pump is simple in structure, thus allowing low cost manufacture, and easy assembly and disassembly for cleaning, and, the pump is adaptable for direct mounting upon the ink fountain of a printing press, thereby eliminating hoses, tanks, and buckets generally required by printing press pumps of the prior art.
Brietiy, the `centrifugal pump of the invention includes a smooth conical rotor, the upper end of which is closed, and has a plurality of openings about the periphery thereof, while the lower end of the rotor is positioned for irn- -mersion in the ink to be circulated. A collector cup is arranged about the upper end of the rotor, which cup has a pitcher spout through which the ink can pass by gravity to an ink fountain of the printing press. The pump operates on the simple principle of centrifugal force, whereby rapid rotation of the rotor causes the ink to be lifted upwardly and outwardly through the openings at the upper end of the rotor. The pump operates only to lift liquid a given amount; there is no pressurization of the liquid being pumped. The volume of liquid to be pumped may be varied by regulating of rotor speed. The rotor is preferably rotated by lan air mot-or, when the pump is used in the vicinity of inflammable solvents, such as are commonly used in printing inks.
The main object of this invention is to provide a centrifugal pump for use in handling abrasive -and/ or corrosive liquids.
A more specific object lof this invention is to provide a centrifugal pump for handling abrasive and/ or corrosive 2 liquid-s, which pump has no close fitting parts, thus avoiding wear on the operative parts of the pump.
Another object of this invention is to provide a centrifugal pump for handling abrasive and/ or corrosive liquids wherein the liquid being handled is free from Contact or exposure to seals, bearings, or pump lubricants, thus avoiding contamination of the pump parts, as Well as the liquid being circulated.
Still another object of this 4invention is to provide a centrifugal pump which eliminates the need for hoses, tanks and lbuckets generally used with pumps when applied upon the ink fountains of certain printing presse-s.
Another object of this invention is to provide a centrifugal pump which is simple in structure, thus allowing low cost manufacture, and easy assembly and disassembly.
These and further obiects and features of the invention will become more apparent from the following description and the accompanying drawing wherein:
FIG. l is an elevation View, substantially in cross-section, illustrating a centrifugal pump representing an embodiment of the invention, which pump is shown as applied to a printing press; and,
FIG. 2 is a section view generally as seen along line 2-2 in FIG. l.
Referring now to the drawing, the numeral 10 identifies `a pum-p assemblage which includes -a rotor assembly l2, and a collector cup 14. The rotor assembly 12. includes a rot-or in the form of a smooth conical cylindrical member lo which tapers toward an opening at the lower end, the upper end of the rotor being formed to provide a cylindrical enlargement 1S, anda hub member zii which encloses the upper end of the rotor 16 and to which the rotor is securely affixed for vertical suspension. The taper of the rotor 16 may be set according to pump, or lifting effect desired; in the disclosed application of the pump, a taper of approximately 5 was found to provide satisfac- 4tory results. While Ithe rotor has 4been described as having a smooth surface, it maybe desirable, under certain conditions, to employ a surface that is not exactly smooth. In any event, the main objective is to employ a rotor configuration which will develop a lifting force upon the liquid as the rotor is caused to rotate. The lower surface Iof the hub member Ztl is tapered whereby an apex 22 thereof will coincide with the longitudinal centerline of the rotor 16. A plurality of equi-spaced holes, or openings 24 are provided in the side Wall of the rotor cylindrical enlargement 18, the upper edge of said openings coinciding with the outer edge of the tapered surface formed on the hub 20.
The Acollector cup 14 is formed to provide a flanged hole 26, the flange thereof extending upwardly and in spaced relation to the exterior of the rotor 16. A side portion of the collector cup is formed to provide a pitcher spout 28, which extends outwardly from the wall of the collector cup to provide an opening 30 which is co-extensive with the lower surface of the collector cup. A closure ring, or cover means 32 is securely affixed to the collector cup 1d at the upper end thereof, which closure ring is adapted to support a motor means assembly 34. The motor assembly 34 includes a shaft 35, to which is secured a hub 3S adapted to receive in snug engagement, the rotor hub member Zit. Holding means, such as set screws riti may be used to secure the hub member 2i? to the hub 38. The motor means 34 may be of any type as wiil provide high speed rotation of the shaft 36, however', when the centrifugal pump of the invention is being used to handle inflammable, or explosive liquids, the use of an explosion proof motor, such as an air motor would naturally be recommended. ln the illustrated arrangement, an air motor 42 is utilized which is supplied with compressed air via a conduit, or pipe arrangement 44.
While the centrifugal pump of the invention will be found to be extremely well suited for many applications, especially wherein the liquid to be handled is of an abrasive and/or corrosive nature, it will be described as applied to a printing press for circulating Vsolvent type inks andv coatings, as used in flexographic and gravure Vprinting, As seen in FIG. 1, a pair of inlcing rolls, or rollers 46 and are arranged in rolling engagement, while a panmeansl -is supported beneath the ink rolls by a pairof rod means 52, 54. The pan means 5d includes an ink fountain portion 56, and a sump portion 5S. The
as will be readily apparent.
The pump assemblage 1t) is aiixed to an adjustable mounting bracket assemblage 60 which is clamped upon the pan means Si? so that the lower end of the rotor 16 is'immersedin the ink supply in the sump portion St?,
while the pitcher spout 28 is arranged to discharge ink y into the fountain portion 56. A shield in the form of a cylindrical tube 62, may be aflixed to the bracket assemblyinconcentricspaced relation to the rotor 16, which shield 62 extends downwardly a given distance below the surfaceof the' ink-in thesumpportion 5S.
The operation of the centrifugal pump of the invention is-extremelysimple fonthe pumping andcirculatingof printing ink. The pump operateson the simple. principle of centrifugalforce; rapid rotation of the rotor 16 causes the; inlei to be lifted upwardlywithinthe rotor and `discharged lor expelled 'radiallythrough the rotor openingsf.
24.1The inlt thus expelled, will be caught, in the collector-cup ,from whence it willow by gravity through the g' s pout,opening,tlginto the ink fountain 56. The volumegof liquid -to be pumped or circulated,v may be easily regulatedby controllingthespeed of the motor 4t2, which,
in thecase of ,an airgnoton involves noV more than the adjustment of an air Yllowyalve.V
Front/thev foregoing, it willbe appreciated that the centrifugal pumpof the invention may be used to realize. ally of v the objectives set forth in the early partof this y disclosure.
"[hev foregoing description has been Vgiven 4in detaill withoutthought of limitation since theinventive principlesinvolved are capable of assuming otherforms'with-v out .departing from the spirit of the invention or the scope of the following claims. Whatis claimed is:
l. A .centrifugal pump for raising liquids; including, a hollow rotor having a smooth interiorV surface which tapers toward an opening at the lower extremity, ,a hub` means attheupper extremity of the rotor, said hub means being arranged .forthevertical suspension of said rotor,V
2. A centrifugal pump for raising liquids including,
a smooth interiorV hollow conical rotor tapering toward an opening at the lower extremity and having a cylindrical enlargement at the opposite extremity, a hub meanssecuredI to and enclosing said cylindrical enlargement and being narranged for the vertical suspension of the rotor,
said rotor being formed to provide openings adjacent said hub means to allow radial discharge of liquid raised upwardly within the rotor due to rotation thereof, and a collector cup surrounding the upper end of said rotor for receiving the liquid discharged from said openings, said collector cup being formed to provide a flanged opening for receiving in spaced relation said rotor and being further formed to provide an opening to allow egress of liq uid from the collector cup.
3. A centrifugal pump for raising liquids including, a smooth interior hollow .conical rotor tapering toward an opening at the lower extremity and having a cylindrical enlargementat the opposite extremity, a hub means secured to and enclosingsaid cylindrical venlargeafnent and being arranged for the vertical suspension of the rotor,
said rotor being formed to provide a plurality of openings adjacent said hub means to allow radial discharge of liquid raised upwardly within the rotor due to rotation thereof, a collector cup surrounding the upper end of said from the collector cup, and a covermeans for said col-- lector cup, said cover-means being arranged for support of a motor means'operable for rotation of said rotor.v
4. A centrifugal pump according to claim 3, wherein a shield-means in thefformr of a cylindrical tube is arranged.y below the collectorcupand in spaced relation to said rotor.
5. A printing press roll-inking Yarrangement comprising in combination, an inkingl roller, a constant level ink fountain .which formspart of a pan means including a sump portion which receives overflow inkfrom the ink'- fountain, a rotor assembly including al smooth interiorhollow `conical rotor. tapering toward an opening at the lower extremityandnhaving acylindrical enlargement at the opposite extremity, a hub means secured to and enclosing saidecylindrical enlargement-and being arrangedY for thevertical suspension of the rotor, said. rotorbeing formedto provide .a plurality of openings adjacent said hubmeanstoallow radial discharge of liquid raised upwardly within therotor due to rotation thereof, acollector cup surrounding the upper end of said rotor for receiving the ,liquiddischarged fromsaidopenings, said collector cup being formed to provide a flanged*k opening in spacedrelation lto saidrotor, the flange of said opening extendingupwardly, saidcollector. cup being furtherarranged vto vprovide a pitcher spout having f an .opening whichis positionedl above the ink fountain, and a bracket meansgfor` supporting the centrifugal pump assemblage so that the lower end of the rotor will .be immersed. in a body of inkin thesurnp portion.,
6. A centrifugalpurnp-accordingto claim 5, wherein a cover means is arranged atop said collector cup, which cover means is, adapted forthe, support of amotor meansV operable for'rotation of Saidrotor.,
References Cited in the le of this patent UNlTED STATES PATENTS 342,723 Ancira May 25, 1886 1,431,350 Woodyv .Oct. l0, 1922 1,995,701y Buttner Mar. 26,fl935 2,419,905 Miess Apr.r 29, 1947 2,650,537 Rosse Sept., l, 1953y 2,783,088 Butler Feb.v 26, 1957
Claims (1)
- 5. A PRINTING PRESS ROLL INKING ARRANGEMENT COMPRISING IN COMBINATION, AN INKING ROLLER, A CONSTANT LEVEL INK FOUNTAIN WHICH FORMS PART OF A PAN MEANS INCLUDING A SUMP PORTION WHICH RECEIVES OVERFLOW INK FROM THE INK FOUNTAIN, A ROTOR ASSEMBLY INCLUDING A SMOOTH INTERIOR HOLLOW CONICAL ROTOR TAPERING TOWARD AN OPENING AT THE LOWER EXTREMITY AND HAVING A CYLINDRICAL ENLARGEMENT AT THE OPPOSITE EXTREMITY, A HUB MEANS SECURED TO AND ENCLOSING SAID CYLINDRICAL ENLARGEMENT AND BEING ARRANGED FOR THE VERTICAL SUSPENSION OF THE ROTOR, SAID ROTOR BEING FORMED TO PROVIDE A PLURALITY OF OPENINGS ADJACENT SAID HUB MEANS TO ALLOW RADIAL DISCHARGE OF LIQUID RAISED UPWARDLY WITHIN THE ROTOR DUE TO ROTATION THEREOF, A COLLECTOR
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36864A US3075459A (en) | 1960-06-17 | 1960-06-17 | Centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36864A US3075459A (en) | 1960-06-17 | 1960-06-17 | Centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3075459A true US3075459A (en) | 1963-01-29 |
Family
ID=21891082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US36864A Expired - Lifetime US3075459A (en) | 1960-06-17 | 1960-06-17 | Centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3075459A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435803A (en) * | 1965-12-27 | 1969-04-01 | Xerox Corp | Lifting apparatus |
| US3477383A (en) * | 1967-03-28 | 1969-11-11 | English Electric Co Ltd | Centrifugal pumps |
| US3947152A (en) * | 1974-07-01 | 1976-03-30 | Ace Envelope Manufacturing Corporation | Printing press centrifugal pump assembly |
| EP0038389A1 (en) * | 1980-04-18 | 1981-10-28 | Weir Pumps Limited | Pump for solids handling |
| AT403085B (en) * | 1991-05-21 | 1997-11-25 | Trawoeger Werner | Pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US342723A (en) * | 1886-05-25 | Centrifugal pump | ||
| US1431350A (en) * | 1921-06-24 | 1922-10-10 | Azariah B Woody | Centrifugal pump |
| US1995701A (en) * | 1932-04-27 | 1935-03-26 | Goss Printing Press Co Ltd | Inking mechanism |
| US2419905A (en) * | 1940-08-27 | 1947-04-29 | Miess Fred | Centrifugal pump |
| US2650537A (en) * | 1949-06-17 | 1953-09-01 | American Type Founders Inc | Inking mechanism for printing presses |
| US2783088A (en) * | 1953-11-09 | 1957-02-26 | Thomas P Butler | Minnow box aerator pump |
-
1960
- 1960-06-17 US US36864A patent/US3075459A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US342723A (en) * | 1886-05-25 | Centrifugal pump | ||
| US1431350A (en) * | 1921-06-24 | 1922-10-10 | Azariah B Woody | Centrifugal pump |
| US1995701A (en) * | 1932-04-27 | 1935-03-26 | Goss Printing Press Co Ltd | Inking mechanism |
| US2419905A (en) * | 1940-08-27 | 1947-04-29 | Miess Fred | Centrifugal pump |
| US2650537A (en) * | 1949-06-17 | 1953-09-01 | American Type Founders Inc | Inking mechanism for printing presses |
| US2783088A (en) * | 1953-11-09 | 1957-02-26 | Thomas P Butler | Minnow box aerator pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435803A (en) * | 1965-12-27 | 1969-04-01 | Xerox Corp | Lifting apparatus |
| US3477383A (en) * | 1967-03-28 | 1969-11-11 | English Electric Co Ltd | Centrifugal pumps |
| US3947152A (en) * | 1974-07-01 | 1976-03-30 | Ace Envelope Manufacturing Corporation | Printing press centrifugal pump assembly |
| EP0038389A1 (en) * | 1980-04-18 | 1981-10-28 | Weir Pumps Limited | Pump for solids handling |
| AT403085B (en) * | 1991-05-21 | 1997-11-25 | Trawoeger Werner | Pump |
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