US2654324A - Electromagnetic pumping device for pumping fluids - Google Patents

Electromagnetic pumping device for pumping fluids Download PDF

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US2654324A
US2654324A US182981A US18298150A US2654324A US 2654324 A US2654324 A US 2654324A US 182981 A US182981 A US 182981A US 18298150 A US18298150 A US 18298150A US 2654324 A US2654324 A US 2654324A
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diaphragm
pumping
electromagnetic
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/023—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms double acting plate-like flexible member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems

Definitions

  • This invention relates to electromagnetic pumping devices for pumping a gaseous or liquid fluid either with or without increase in pressure.
  • the present invention yrelates to ends, and the curvature of the continuously 4curved ⁇ surface is so selected that the deflected an electromagnetic pumping ⁇ device or compressor-V*j of the type in which electromagnetic means including a plurality of magnetizable concentric portions forming one or two substantially continuous surfaces are disposed within a housing.
  • Each ofthe said surfaces may be inwardlycurved to form a shallow bowl.
  • the concentric magnetizable portions coact with armaturemeans in form of a flexible diaphragm which is supported along its periphery in the housing in a position facing the continuous surface or surfaces and forms together with each adjacent, continuous surface a pumping chamber.
  • Electric means are provided forenergizing the said concentric portions intermittently so as to cause the diaphragm to oscillate thereby intermittently varyw ment of the diaphragm in opposite direction.
  • the efficiency of the pumping action is substantially aected by the extent to which the diaphragm, when oscillating, can nest itself in the bowl formed by the aforesaid continuous surface or surfaces.
  • appreciable airgaps remaining between a fully flexed diaphragm and the respective continuous curved surface will adversely iniiuence the magnetic force available for the attraction of the diaphragm and, hence, the power of the pumping action.
  • One of the objects of the present invention is to provide a novel and improved mountingarrangement for the diaphragm and also-a novel and improved conguration ofthe continuously curved surface which latter surface together diaphragm can hug the same closely thereby preventing the retention of appreciable local air gaps between thediaphragm and the said continuous surface.
  • Another object of the invention is to provide means by which the amount of pumping work rendered bythe outer portions of the electromagnetic means is increased.
  • Fig. 1 is a cross-sectional view of an electromagnetic pumping device according to the invention.
  • Fig. 2 is a graph of the bending line of the diaphragm
  • Fig. 3 is a diagrammatic circuit system for the electromagnetic means of Va pumping device according to the invention.
  • the electromagneticpumping device according to this ligure is shown as a double acting pump for pumping liquid ⁇ or gas.
  • the pump .o comprises two casing or housing with the adjacent surface of the diaphragm l forms a pumping chamber. More specifically, the diaphragm is so arranged that, when deflected, it forms a twice flexed surface the meridian cross-section of which is somewhat similar to the elastic line of' a loaded girder held at'both n halves 5 and 5 housing the electromagnetic means of the device.
  • These electromagnetic means are shown as comprising two sets A and By of concentricallyvarranged magnet members. Three members, generally designated by I, 2, 3 and 1, 8, 9 are shown for each set. Each of said members comprises an annular ferro-magnetic core 2i) of substantially U-shaped cross-section.
  • the annular cores maybe ring-shaped, polygonal or otherwise shaped. They may beV secured to the respective casing half by any suitable means such as rivets 4.
  • the exciting coils 2l of the magnet members are inserted in the open grooves of the cores and are embedded therein ⁇ in a mass of an insulation material 22 of a type becoming very hard when dry.,
  • This insulation mass together with the pole faces of the cores forms a substantially continuous smooth surface in form of a curved shallow bowl as can be clearly seen on Eig. 1.
  • This gure also shows that the Shanks of the cores are tapered toward the pole faces to providefor the greatest possible flux density of the magnetic fieldsat or near the pole faces.
  • Thetwo halves 5 and 6, of the casing or house? 3 ing may be joined by any suitable means such as bolts and nuts I2.
  • the armature means are inserted between the two halves of the casing and positioned to face the two sets A and B of the electromagnetic means.
  • the armature means are shown in form of a exible diaphragm which may comprise a single disc or be composed of several thin discs or laminae.
  • the inner discs 25 and 26 are provided with a plurality ofpwradially spaced slots (not shown) each in registry with one :or holes 21 in the cover discs 23 and 24.
  • the diaphragmdisc is held between the halves Aof the'casing yandis centered in the casing by Vmeans of a centeringring I3.
  • Two sealing rings 29 and 30 serve to prevent seepage of fluid between the casing halves and the outside of cover plates 23 Yarid24.
  • the diaphragm forms together with each adjacent' 'con'tiiuo'us surface 'a ⁇ pumping chamber IB and Il respectively.
  • Chamber I communicates with a discharge valve I4 and chamber II with a'dis'charge valve I5.
  • Each' discharge valve comprises a valve plate 3l pressed by a spring 32"a,'gai'nst ⁇ -a valve seat. "The valve plates, when seated',v close a bore A33 leading into the respective pumpin'g'chamber.
  • the'peripheral rim portion of diaphragm Dv is held between parallel wairprnous35 and v31 formed by thefacing'sur- A 'faces of'housing halves Sand
  • ⁇ t hes ⁇ e parallel wall portions have ⁇ a radial Lwifdth ARQ'
  • the parallel wall portions are continued by slightly slanted Wall portions 36' which form continuations of the aforesaid continuously curved surfaces and hence also of the pumping chambers I0 and Il.
  • a diaphragm thus held between the halves of the housingex- -periences the intended double deectio-n as is clearly shown on Fig. 2.
  • the slants of the aforementioned wall portions' 36 which in effect vform part of oneof the walls vof the pumping chamrbers "must of course be 'so selected that they radii Rm.
  • the portion of the continuous sur also be so made that the direction of current isreversed in the coils of adjacent annular cores and that the direction of the current flow in the v corresponding exciting coils of the upper set and inpthe'lower set ⁇ of magnet members is opposite.
  • Sitable'connecti'ons are shownfin Fig. 3:1
  • the ramrovv's-a. indicate the direction of the magnetic flux for each annular core element, and the marks respective coil.
  • Y v f In'the circuit diagrarn,-A is'the upperfand is the lower set of. magnetv members;-ai ⁇ single cross) 'indicate the'direction' oi'current inthe fphase' alternating current-generator is --designated by W; and G1 indicate the recti'ers in A'the one' phase net; ⁇ R andf S' aretheimain-lines 'from the generator; and AM-are cut-outiuses.
  • the operation of the doubleV acting pumping is'as follows: l Y
  • the depth h ⁇ ofthe 'deflection is shown exaggerated 5 relative to niedia-meter of the'V diaphragm for purpose of clarity.
  • the double bending line of the diaphragm is caused by theprovision and configuration of the vwalls v35'and 31.
  • ⁇ It is characteristic for the bending "lineaccording to Fig. 2 thatthe airgap increases slowly up to the rst bending zone and then more rapidly.
  • the I arrangement that the radius Rk of theroutermost magnet .Y member l isV smaller than theY radius Rm of the pumping chambers l and Il has the advantage that the outermost magnet member, now facing a comparatively wide portion of the airgrap, produces a high portion of the total pumping work.
  • electromagnetic means within the housing including a plurality of ring-shaped magnetizable portions in concentric arrangement, adjacent face sides on one side of said ring portions being disposed in a special relationship s0 as to form a substantially continuous inwardly curved circular surface, armature means'in form of a flexible circular diaphragm disposed within the housing so as to form a pumping chamber between the diaphragm and the continuous surface, said housing having in its inner wall a peripheral recess defining opposite outer wall portions disposed adjacent to said continuous surface and slanted so as to form substantially a continuation thereof, said recess further defining opposite inner wall portions disposed Vparallel to each other, the peripheral rim of the diaphragm being extended into and held between the parallel wall-portions of the inner recess portion, the curvature of the continuous surface corresponding to the configuration of the diaphragm in flexed position, electric means for intermittently en
  • iiuid admission means arranged to communicate with the pumping chamber and to admit iiuid into the chamber upon oscillatory movement of the diaphragm in one direction
  • fluid discharge means arranged to coxnnunicate with the pumping chamber to discharge fluid vfrom a chamber upon oscillatory movement of the diaphragm in opposite direction.
  • electromagnetic means comprising two electromagnets, each including a plurality of magnetizable ring-shaped portions in concentric arrangement, adjacent face sides on one side of said ring portions being disposed in a spacial relationship so as to form one substantially continuous inwardly curved surface, said electromagnets being disposed within the housing opposite to each other spaced apart, armature means in form of a flexible circular diaphragm disposed within the housing so as to form a pumping chamber between the diaphragm and each adjacent continuous surface, said housing having in its inner wall a peripheral recess defining outer Wall portions disposed adjacent to said continuous surface and each slanted so as to form an extension of the adjacent portion of the respective curved continuous surface and inner wall portions disposed parallel to each other, the peripheral rim of the diaphragm being extended into and held between the parallel wall portions of the inner recess portion, the curvature of each continuous surface corresponding to the configuration of the diaphragm

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating Pumps (AREA)

Description

Oct. 6, 1953 A. RYBA g 2,654,324
ELECTROMAGNETIC PUMPING DEVICE FOR PUMPING FLUIDS Filed Sept. 2, 1950 Patented Oct. 6, 1953 ELECTROMAGNETIC PUMPING DEVICE PUMPING FLUIDS FOR I Anton Ryba, Bolzano, Italy Application SeptemberZ, 41950, Serial No. 182,981 In Austria September 5, 1949 (c1. st-.53)
, 9Claims.
This invention relates to electromagnetic pumping devices for pumping a gaseous or liquid fluid either with or without increase in pressure.
In particular, the present invention yrelates to ends, and the curvature of the continuously 4curved `surface is so selected that the deflected an electromagnetic pumping `device or compressor-V*j of the type in which electromagnetic means including a plurality of magnetizable concentric portions forming one or two substantially continuous surfaces are disposed within a housing.
Each ofthe said surfaces may be inwardlycurved to form a shallow bowl. The concentric magnetizable portions coact with armaturemeans in form of a flexible diaphragm which is supported along its periphery in the housing in a position facing the continuous surface or surfaces and forms together with each adjacent, continuous surface a pumping chamber. Electric means are provided forenergizing the said concentric portions intermittently so as to cause the diaphragm to oscillate thereby intermittently varyw ment of the diaphragm in opposite direction. An
electromagnetic pumping device of this type is more fully described in my co-pending applica- `tion Ser. No. 46,377, filed on August 27, 1948:
With electromagnetic pumping devices of the general type, above referred to, the efficiency of the pumping action is substantially aected by the extent to which the diaphragm, when oscillating, can nest itself in the bowl formed by the aforesaid continuous surface or surfaces. As will be apparent, appreciable airgaps remaining between a fully flexed diaphragm and the respective continuous curved surface will adversely iniiuence the magnetic force available for the attraction of the diaphragm and, hence, the power of the pumping action.
One of the objects of the present invention is to provide a novel and improved mountingarrangement for the diaphragm and also-a novel and improved conguration ofthe continuously curved surface which latter surface together diaphragm can hug the same closely thereby preventing the retention of appreciable local air gaps between thediaphragm and the said continuous surface.
Another object of the invention is to provide means by which the amount of pumping work rendered bythe outer portions of the electromagnetic means is increased.
Other and further objects, features and advantages of the invention will be pointed out hereinafter and set forth in the appended claims forming part of the application.
In the accompanying drawing a now preferred embodiment of the invention is shown by way of illustration'and not by way of limitation.
In the drawing:
Fig. 1 is a cross-sectional view of an electromagnetic pumping device according to the invention.
Fig. 2 is a graph of the bending line of the diaphragm, and
Fig. 3 is a diagrammatic circuit system for the electromagnetic means of Va pumping device according to the invention.
Referring now in detail to the embodiment shown on Fig. 1, the electromagneticpumping device according to this ligure is shown as a double acting pump for pumping liquid `or gas.
. The pump .o comprises two casing or housing with the adjacent surface of the diaphragm l forms a pumping chamber. More specifically, the diaphragm is so arranged that, when deflected, it forms a twice flexed surface the meridian cross-section of which is somewhat similar to the elastic line of' a loaded girder held at'both n halves 5 and 5 housing the electromagnetic means of the device. These electromagnetic means are shown as comprising two sets A and By of concentricallyvarranged magnet members. Three members, generally designated by I, 2, 3 and 1, 8, 9 are shown for each set. Each of said members comprises an annular ferro-magnetic core 2i) of substantially U-shaped cross-section. The annular cores maybe ring-shaped, polygonal or otherwise shaped. They may beV secured to the respective casing half by any suitable means such as rivets 4. The exciting coils 2l of the magnet members are inserted in the open grooves of the cores and are embedded therein `in a mass of an insulation material 22 of a type becoming very hard when dry., This insulation mass together with the pole faces of the cores forms a substantially continuous smooth surface in form of a curved shallow bowl as can be clearly seen on Eig. 1. This gure also shows that the Shanks of the cores are tapered toward the pole faces to providefor the greatest possible flux density of the magnetic fieldsat or near the pole faces.
Thetwo halves 5 and 6, of the casing or house? 3 ing may be joined by any suitable means such as bolts and nuts I2.
The armature means, generally designated by D, are inserted between the two halves of the casing and positioned to face the two sets A and B of the electromagnetic means. The armature means are shown in form of a exible diaphragm which may comprise a single disc or be composed of several thin discs or laminae. There are shown two outer full or cover discs 23 and-"24 made of ferro-magneticpr 'otherymagnetizable material and two inner or filiing discs. 25` 'and 26 which may or may not be made @magnetizable material. The inner discs 25 and 26 are provided with a plurality ofpwradially spaced slots (not shown) each in registry with one :or holes 21 in the cover discs 23 and 24. Slotted plates la and I9 respectivelyare fastened by means of a rivet 28 to the outside of each cover plate. The slots'of Vplates I8"a'ndV i9 form a plurality of fingers each covering one of theholes 21. As'will T bemore'fully explained later on, plates I8 and '519 together with holes-21 form valves. Rivet 28 is preferably unround to prevent rotation of npilates I8 and I9 relative to holes 21:V
The diaphragmdisc is held between the halves Aof the'casing yandis centered in the casing by Vmeans of a centeringring I3. Two sealing rings 29 and 30 serve to prevent seepage of fluid between the casing halves and the outside of cover plates 23 Yarid24. v
As can best' be seenon Fig. '1, the peripheral edge of the inner discs Yof the diaphragm is ex- Atended'into'an'arinular channel I1 thereby per- 'mittingfiiui'd to iiow Vfrom channel I1 into the slotsoi discs'25 and 26.- -Channel I1 communicates with an inlet iiange I6 which should be visualized as being connected to a supply of fluid "to be pumped.
The diaphragm forms together with each adjacent' 'con'tiiuo'us surface 'a `pumping chamber IB and Il respectively. Chamber I communicates with a discharge valve I4 and chamber II with a'dis'charge valve I5.' Each' discharge valve comprises a valve plate 3l pressed by a spring 32"a,'gai'nst`-a valve seat. "The valve plates, when seated',v close a bore A33 leading into the respective pumpin'g'chamber.
' y Accordin" tothe invention;the'peripheral rim portion of diaphragm Dv is held between parallel wairprnous35 and v31 formed by thefacing'sur- A 'faces of'housing halves Sand As can best be A seen `on Fig. 2,`t hes`e parallel wall portions have `a radial Lwifdth ARQ' The parallel wall portions are continued by slightly slanted Wall portions 36' which form continuations of the aforesaid continuously curved surfaces and hence also of the pumping chambers I0 and Il. A diaphragm thus held between the halves of the housingex- -periences the intended double deectio-n as is clearly shown on Fig. 2. The slants of the aforementioned wall portions' 36 which in effect vform part of oneof the walls vof the pumping chamrbers "must of course be 'so selected that they radii Rm. The portion of the continuous suralso be so made that the direction of current isreversed in the coils of adjacent annular cores and that the direction of the current flow in the v corresponding exciting coils of the upper set and inpthe'lower set`of magnet members is opposite.
`fisalresult, the magnetization of the diaphragm "during the alternate excitation of the upper and lower set is not reversed and the iron losses of the diaphragm are thus reduced.
Sitable'connecti'ons are shownfin Fig. 3:1 The ramrovv's-a. indicate the direction of the magnetic flux for each annular core element, and the marks respective coil.' Y v f In'the circuit diagrarn,-A is'the upperfand is the lower set of. magnetv members;-ai`single cross) 'indicate the'direction' oi'current inthe fphase' alternating current-generator is --designated by W; and G1 indicate the recti'ers in A'the one' phase net;` R andf S' aretheimain-lines 'from the generator; and AM-are cut-outiuses. The operation of the doubleV acting pumping is'as follows: l Y
When'the'compressor is'connected to a circuit system according toFigfS; th'erectiflers (each "group of coils must be connected to 'a rectifier) Gland Gi let each pass onehalfy wave offthe device orcompressor, as-hereinbefore'described alternating =current". Accordingly during each period of4 the current the lower and upper setfof v magnetmembers are alternately excited so that the magnetic'attraction forces thus created v'pull the diaphragm alternately into opposite direc- -f tion? Consequently, the' diaphragm is viie'xed "toward thecurvec'l surfaceof the excited setV of magnet members. vAt the same time a partial vacuum is formed inthe pumping chamber bounded bythe opposite-.face of the diaphragm sothati'gas or liquid is sucked throughft'heiannular- '"channelf`l1,' the radial slots of .the filling discs-25"andi 26 and the' temporarily `uncovered vopenings 21. Theother valve plate,-of course, remains pressed against the diaphragm. -lAs a result, uid is sucked into the respective pumping chamber. If now the other pumping charnv-berhas been iilledV previously with fluid, this fluid-will press the'respective valve plate 3I away from its seat against the action' of spring 32 so thatthe Ifluid isdischarged through the -respec- -tive'discharge'valve'li or i5. The samecycle is repeated when the other set of magnet mem- Let it be assumed that theupper set ormagnetmembers isexcited. Then,` the outer Vmarginal Azone of the diaphragml is rst attracted 'since the airgap is smallest in this `zone;` As a result; the compression-of iiuid inthe respective pumping'chamber begins and the airgap is gradually'reduced'from theI e'xteriortoward the center as the' deflection of the diaphragm progresses. As 'the diaphragm is"'deflected, itexperiences'a double bending 'or curvature. Fig. 2 showsa meridian section of a deflecteddiaphragm. The depth h` ofthe 'deflection is shown exaggerated 5 relative to niedia-meter of the'V diaphragm for purpose of clarity. As will, be apparent, the double bending line of the diaphragm is caused by theprovision and configuration of the vwalls v35'and 31. `It is characteristic for the bending "lineaccording to Fig. 2 thatthe airgap increases slowly up to the rst bending zone and then more rapidly. The I arrangement that the radius Rk of theroutermost magnet .Y member l isV smaller than theY radius Rm of the pumping chambers l and Il has the advantage that the outermost magnet member, now facing a comparatively wide portion of the airgrap, produces a high portion of the total pumping work.
The invention has been illustrated in connection with a double acting pump but it is equally applicable to single acting pumps of the type here in question as are described in the aforementioned pending application and other` applications and patents of the applicant.
While the invention has been described in detail with respect to a certain now preferred eX- ample and embodiment of the invention it will be understood by those skilled in the art after understanding the invention, that various changes and modifications may be made without departing from the spirit and scope of the invention and it is intended, therefore, to cover all such changes and modifications in the appended claims.
What is claimed as new and desired to be secured by Letters Patent is:
1. In an electromagnetic pumping device for pumping a fiuid, in combination a housing, electromagnetic means within the housing including a plurality of ring-shaped magnetizable portions in concentric arrangement, adjacent face sides on one side of said ring portions being disposed in a special relationship s0 as to form a substantially continuous inwardly curved circular surface, armature means'in form of a flexible circular diaphragm disposed within the housing so as to form a pumping chamber between the diaphragm and the continuous surface, said housing having in its inner wall a peripheral recess defining opposite outer wall portions disposed adjacent to said continuous surface and slanted so as to form substantially a continuation thereof, said recess further defining opposite inner wall portions disposed Vparallel to each other, the peripheral rim of the diaphragm being extended into and held between the parallel wall-portions of the inner recess portion, the curvature of the continuous surface corresponding to the configuration of the diaphragm in flexed position, electric means for intermittently energizing said concentric magnetiza-ble portions so as to cause vthe diaphragm to oscillate thereby varying the capacity of the pumping chamber, the said concentric portions, when magnetized, attracting adjacent corresponding zones of the diaphragm,
iiuid admission means arranged to communicate with the pumping chamber and to admit iiuid into the chamber upon oscillatory movement of the diaphragm in one direction, and fluid discharge means arranged to coxnnunicate with the pumping chamber to discharge fluid vfrom a chamber upon oscillatory movement of the diaphragm in opposite direction.
2. An electromagnetic pumping device as defined in claim 1, wherein the slant of said outer wall portions of the recess walls is less than the slant of the adjacent portion of the continuous curved surface, thereby causing the diaphragm to experience a bending adjacent to the rim of '.6 saidouterv 4recess portion and a second opposite bending at its center when flexed.
3. An electromagneticpumping device as defined invclaim 1, wherein said housing is formed by two halves, said recess being formed'between 1 vadjacent surfaces of said halves. f .f
e. An electromagnetic pumpingdevice asdelfined in claim 1, wherein the total width of Vsaid concentric magnetizable ring .portions corresponds substantially to the diameter of said :continuous 'curvedsurface less the continuation thereof.
5. An electromagnetic pumping device as defined in claim 1, wherein the wall portions forming said slanted outer recess portion are made of non-magnetic material.
6. In an electromagnetic pumping device for pumping a fluid, in combination a housing, electromagnetic means comprising two electromagnets, each including a plurality of magnetizable ring-shaped portions in concentric arrangement, adjacent face sides on one side of said ring portions being disposed in a spacial relationship so as to form one substantially continuous inwardly curved surface, said electromagnets being disposed within the housing opposite to each other spaced apart, armature means in form of a flexible circular diaphragm disposed within the housing so as to form a pumping chamber between the diaphragm and each adjacent continuous surface, said housing having in its inner wall a peripheral recess defining outer Wall portions disposed adjacent to said continuous surface and each slanted so as to form an extension of the adjacent portion of the respective curved continuous surface and inner wall portions disposed parallel to each other, the peripheral rim of the diaphragm being extended into and held between the parallel wall portions of the inner recess portion, the curvature of each continuous surface corresponding to the configuration of the diaphragm in exed position, electric means for intermittently energizing said concentric magnetizable portions so as to cause the diaphragm to oscillate thereby varying the capacity of each pumping chamber, the said concentric portions, when magnetized, attracting adjacent correspending zones of the diaphragm, fluid admission means arranged to communicate with each pumping chamber and to admit uid into a chamber upon oscillatory movement of the diaphragm in one direction, and fluid discharge means arranged to communicate with each pum-ping chamber to discharge iiuid from a chamber upon oscillatory movement of the diaphragm in opposite direction.
'7. An electromagnetic pumping device as defined in claim 1, wherein said housing comprises two substantially symmetrical sections joined together and each being formed with a wall facing the corresponding wall of the other section, each of said facing walls including a portion forming together with the adjacent wall portion of the other section said parallel wall portions of the recess and a portion forming together with the adjacent wall portion of the other section said slanted wall portions of the recess, y
8. An electromagnetic pumping device as defined in claim 7, wherein said slanted Wall portions forming a continuation of said curved surface are also ring shaped for forming together with the diaphragm said pumping chamber, and wherein said diaphragm faces the continuously curved surface formed by the magnetizable portions and also the said extension of said surface,
vouter diameter of the diaphragm.V r 9:"An electromagnetic pumping." device *.nedfin claim `8, wherein said slanted ring shaped the-mxmumfouter 'diameterl ofv said ring shaped magnetizable portionsrxbeingf smaller than-the housng wall portions between the maximum outer diameter of the'magnetizable portions and the 'maximum outerV diameter of .saidextension of Vthefzcultved .surface are l'maideof Vnon-magnetic material. t. r z ANTON RYBA;y
' References Gtedlin the ,me o1 this patent Number -Nafme Dxvac'e ,6 1,380,442 Trumble Jlme {7,11-921 1,425,191 Garbarini Aug:,fk8,.-1$2 REI'GN PATENTS A Nmber Y Country i Date U 1 '552,836 Germany Junegzli 1930 mn., Y. \L e ""3
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381623A (en) * 1966-04-26 1968-05-07 Harold F Elliott Electromagnetic reciprocating fluid pump
US3406670A (en) * 1966-03-10 1968-10-22 Hines & Ass E W Magnetostrictively actuated fuel system for engines
US5201643A (en) * 1990-03-31 1993-04-13 Aisin Seiki Kabushiki Kaisha Compression machine
US5251539A (en) * 1991-03-26 1993-10-12 Aisin Seiki Kabushiki Kaisha Bellows pump
US6554587B2 (en) 2000-11-16 2003-04-29 Shurflo Pump Manufacturing Company, Inc. Pump and diaphragm for use therein
US20030153638A1 (en) * 2001-08-16 2003-08-14 Industrial Technology Research Institute Method for crosslinking porous biodegradable polymers
US20080038125A1 (en) * 2006-08-09 2008-02-14 Alps Electric Co., Ltd. Piezoelectric pump and piezoelectric vibrator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1380442A (en) * 1919-07-29 1921-06-07 Walter L Mack Fuel-supplying means for motor-vehicles
US1425191A (en) * 1919-12-26 1922-08-08 Garbarini Andre Pumping apparatus
DE552836C (en) * 1930-06-28 1932-06-18 Reinhard Wussow Electromagnetically operated pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1380442A (en) * 1919-07-29 1921-06-07 Walter L Mack Fuel-supplying means for motor-vehicles
US1425191A (en) * 1919-12-26 1922-08-08 Garbarini Andre Pumping apparatus
DE552836C (en) * 1930-06-28 1932-06-18 Reinhard Wussow Electromagnetically operated pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3406670A (en) * 1966-03-10 1968-10-22 Hines & Ass E W Magnetostrictively actuated fuel system for engines
US3381623A (en) * 1966-04-26 1968-05-07 Harold F Elliott Electromagnetic reciprocating fluid pump
US5201643A (en) * 1990-03-31 1993-04-13 Aisin Seiki Kabushiki Kaisha Compression machine
US5251539A (en) * 1991-03-26 1993-10-12 Aisin Seiki Kabushiki Kaisha Bellows pump
US6554587B2 (en) 2000-11-16 2003-04-29 Shurflo Pump Manufacturing Company, Inc. Pump and diaphragm for use therein
US20030153638A1 (en) * 2001-08-16 2003-08-14 Industrial Technology Research Institute Method for crosslinking porous biodegradable polymers
US20080038125A1 (en) * 2006-08-09 2008-02-14 Alps Electric Co., Ltd. Piezoelectric pump and piezoelectric vibrator

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