US2534520A - Magnetic fuel pump - Google Patents

Description

Dec. 19, 1950 M. KATCHER 5 5 MAGNETIC FUEL PUMP Filed April 14, 1945 v 4 Sheets-Sheet 1 2/ 5 zo 5 4 g s- F/GZ INVENTOR. Morr/s kafcher BY2- 5 W 7 Dec. 19, 1950 M. KATCHER AGNET FUE mu 4 Sheets-Sheet 2 Filed April 14, 1945 Dec. 19, 1950 M. KATCHER 2,534,520

MAGNETIC FUEL PUMP Filed April 14, 1945 4 Sheets-Sheet 3 v INVENTOR. P Morris Marcher BYW/ Dec. I9,' 1950 M. KATCHER MAGNETIC FUEL PUMP 4 Sheeis-Sheet 4 Filed April 14, 1945' INVENTOR. Mar/As Kafcher BY anw/zz Patented Dec. 19, 1950 UNlTED STATES PATENT OFFICE MAGNETIC FUEL PUMP Morris Katcher, New York, N. Y. Application April 14, 1945, Serial No. 588,341

This invention relates to a pump for feeding liquid fuel to an engine. In one type of internal combustion engine the fuel is fed to a carburetor.

I is inconvenient to get at the pump if set inside the tank so it is set on the fuel line. With my electrically or magnetically operated pump, a standard form can be used for various types of engines in contrast to the diaphragm operated pumps mechanically operated by the engine. which at present require modification and special design to suit the particular type engine which operates it. The construction of my pump is such that sparking elements are completely sealed off from the fuel. Further it need not be located close to the engine where engine heat tends to create vapor lock.

In one form, my pump is operated from a battery which drives an electric motor operating a commutator device which produces a rotating magnetic field which influences magnetic means inside the fuel system of the engine to rotate with said field. The rotating magnetic means drives the impeller of a centrifugal pump inside the fuel system. In another form, the commutator mechanism is driven preferably by a belt connected to a rotating part of the engine such as the water pump shaft. In the latter form there is not so much leeway in the location of the pump as in the first form.

Other objects and advantages will become apparent upon further study of the description and drawings, in which:

Fig. 1 is a diagram of the pump and its connections to the fuel system of an engine.

Fig. 2 is a longitudinal section through the pump taken along the line 2-2 of Fig. 3.

Fig. 3 is a cross section of the pump taken along the line 3-3 of Fig. 2.

Fig. 4 is a cross section of the pump taken along the line 4-4 of Fig. 2.

Fig.5 is a cross section of the pump taken along the line 6-5 oi Fig. 2.

Fig. 6 is a cross section of the pump taken along the line 6-6 of Fig. 2.

Fig. 7 is a longitudinal section of the pump taken along the line of Figs. 3, and 6.

Fig. 8 is a longitudinal section of the belt driven form of the pump taken similarly to Fig. 7.

Fig. 9 is the electrical diagram of the pump of Fig: 10 is a diagram of the pump showing an 8 Claims. (01. 103-87) electrical control valve for stopping its operation when too much pressure is developed in the fuel line, and

' Fig. 11 is a diagram of the electrical control valve.

The pump denoted in its entirety by the numeral I2 is connected to the bottom of fuel tank l3 by means of pipe l4, the latter entering the tank at the place usually occupied by the drainage plug. However, instead of the usual drainage plug, an internally and externally threaded plug i5 is used into which is screwed the end of pipe I 4. A strainer I6 is provided inside tank I3 for the end of pipe l4. In the particular embodiment of the pump shown in Figs. 1-7, the pump may be located in many positions. It may be located near the fuel tank, whether the latter is at the rear of a car or elsewhere, or it may be located remote from said tank. In a car with the tank at the rear and the engine and its carburetor forward, the pump may be located near the carburetor.

Referring now more particularly to Figs. 2-7, the housing of the pump, in the particular embodiment illustrated, is composed of a plurality of sections I9, 20, 2| and 22, held together by bolts i1 and lag screws l8. Partition section 20 has embedded therein the large diameter portion 23 of fixed shaft 24. Section 20 has also embedded in it iron field pole cores 26, 26. 21, 28, 29 and 30. Shaft 24 and said cores are embedded so tightly in. section 2|! that a liquid tight seal is effected between them and the section. Surrounding one end of cores 26, 26, 21, 28, 29 and 30 are respectively field coils 3|, 32, 33, 34, 36, and 36. These field coils are interconnected as will be hereinafter explained, by wires located in annular channel 31.

I Loosely mounted on shaft 24 inside of impeller section is is a sleeve 38. One end of sleeve 38 is closed and between said closed end and the end of shaft 24 is located a thrust ball bearing 38. The material of shaft 24, sleeves 36 and and impeller 40- is of non-magnetic metal. Impeller 40, which is provided with blades 4|, is fixed to sleeve 36 as is also permanent bar magnet 42. The latter may also be fixed to impeller 40. Section is, opposite blades 4|, is hollowed out to form a volute 43 as part of the centrifugal pump comprising impeller 40. The fuel enters the pump from pipe l4 at the axis of impeller 40 and leaves from the volute through pipe 44. From pipe 44, the fuel is sent to the engine or motor, usually to the carburetor, not shown, for that type of motor operating with a carbure Sleeve 4' is loosely mounted on shait 24 for its portion jinside commutator brush section 2|. One end of sleeve 4| is closed and a thrust ball bearing 4| is located between said closed'end and the end or shaft :4. A permanent-bar magnet 41 is fixed to sleeve 4|. Sleeve 4| is of non-mags neticmetal. Brush holder is is also fixed to sleeve 4!. It may also be fixed to magnet 41.

brush l2 slides over slip ring". All of the brushes are pressed into contact with their corresponding segments and rings by compression springs ll. Ring II is connected tobattery 02 through binding post I! and wire ll, while ring II is connected to the battery through binding post 84 and wire 68. Segments II, 64, I, I1 and II are connected respectively to field coils SI, 22, 83.14. I! and It as shown in Fig. 9. the connectlng wires for this being omitted from the other It is essential that partition section 2| be held in liquid tight contact with impeller section II. so that no fuel or itsvapor may reach the brushes and commutator segments and rings where spark ing may occur. Sections I9, 20, 2i and 22 are referably made or plastic material such as one of the phenolic resins.

with the brushes set as shown in current ilows from the positive terminal 01' battery l2, through wire 66 to segment 60 where it is picked up by brush 52. From brush 2it passes through connecting bar- It to brush 4! and irom the latter splits intosegments II and I4. The current in segment it enters coil 3! which passes around field pole core 25 in a clockwise direction causing the field pole to be magnetized with the S-pole toward the observer, that is toward permanent magnet armature 41. The current after passing through coil 3i flows through wire II to coil 34 and through the latter. C011 34 is wound around field pole core 28 so that the current flows around in a counter-clockwise direction causing the field pole comprising core 28 to" be magnetized with the N pole toward the observer, that is toward armature 41. The current enters segment 56 from coil 34, passing into brush 50,

connecting bar 10, brush ll, slip ring 59 and finally through wire 65 to the negative pole of battery 62. The other half of the current from brush 49 passes into segment I4 from whence it flows through coil 32, the latter being wound around core 26 so that the current passes in a clockwise direction causing the field pole comprising core 26 to be magnetized with the S pole toward the observer, that is toward armature 41. The current after passing through coil 32 flows through wire 12 to coil 35 and through the latter, to segment 51, brush 50, bar I0, brush 5i. slip ring 59 and wire 65 to battery 62. Coil 35 p is wound around core "29 so that the current 'fiows through it in a counter-clockwise direction causing the field pole comprising core 29 to be magnetized with the N pole toward the observer,

that is toward armature 41. With the field poles at 25 and 28 both magnetized into S poles and the field poles at 34 and 35 both magnetized into N poles, armature 41 will move toward the poles at 28 and 35. So will armature 42 which has its 8 pole on a-line with the N pole of armature 41. Armature 42 is dragged around magnetically with m. 9, the

armature 41, because when a field pole such as the'one at 28 is magnetized with the S poie to ward the observer, it is magnetized with N. pole away from the observer, that is adjacent rms: ture42. This holds true of courseyiorfali' the [field poles. so as they are succeesively'fmagnetlud I one end will infiuence'farmature 4l' whilo the other end will influence armature 42.s'aid armatures facing each other with" opposite'efi'polarity. I As armature 41 moves toward the-' centeroi, j 'ma'gnetlsm between the field poles'at-ill-ai'id'llfj bush 4! moves away from segmentall so-that-fit is entirely on segment 54 andbrushlll is entirely on segment 51. The centers of magnetism are at the, field poles 26 and 2!, attracting both P armature 42 and 41 to lie across them. In this manner, as is well known to theart, brush holder 48 is caused to rotate in a clockwise direction,

Figs. 5 and 9. causing. the field poles to be sucl vi cessively magnetized in the same direction;

when brush 48 reaches segment 5!, it sends the current through coil is ina 'clockwisedirection' around core 21 and in a counter-clockwise direc- Y tion through coil 86 via wire It; From coil It the currentpasses by means or brush it, bar ll,

brush I, slip ring II, wire I to battery I. The l field pole at 21 thus is S facing the observerqand the lleld poleat II is N facing the observer. with the field poles successivelymagnetlzed'in a clockwise direction, armature-41, and impeller 40 are also rotated in this direction when at them in the same direction as in Fig.5. that is to the right in Fig. 2. When viewed to the left, as in Fig. 3. the impeller appears to rotatein a counter-clockwise direction. The fuel from pipe 14 enters segment it at the axis of impeller 4|, Iromwhence it is thrown out radially by blades 41 so that it ,is discharged at pipe 44 whenithe impeller is rotated.

For engines using a carburetor, the fuel islied to the carburetor through pipe 44. A bypass is provided so that when more fuel is being supplied than is being used by the engine, the pressure in ,pipe 44 rises and the fuel is forced past pressure controlled check valve 11 on pipe ll, Fig. 1, back to pipe 14. Check valve 11 prevents-"flow from pipe l4 into pipe II. and has a pressure control in it, not shown but which is well in the art, which prevents flow past it by ma received from pipe 44 until the-pressure oi the fuel from said pipe exceeds a'pre'cletermined amount.

An alternate to the bypass lust described-11s shown in Figs. 10 and 11. This alternate ignot a bypass. but shuts oi! the current from battery 62 when the pressure in pipe 44 exceeds" a predetermined amount. A circuit breaking valve 'II is set in pipe 44. Said valve has a chamber ll minals BI and I2 in'battery wire 86 are insulatively mounted on the valve. These terminals are adaptedto be connected by contact piece II when pulled against them by diaphragm l4. Tension spring normally holds diaphragm l4. and contact piece 83 against terminals II and '2, but when the'pressure in pipe 44 exceeds a predetermined amount, the tension of spring II is I overcome and contact between said terminals is broken stopping the action of the pump.

Provision must be made to provide againstarc-- no waste of current. only sufficient pumping bein'g done to suit the demands of the engine.

In the alternate form shown in Fig. 8, instead of an electric motor driving the commutator mechanism it is driven by a belt 88. Belt 88 is driven from an engine part, such as-the water pump shaft, not shown. Belt 88 engages pulley ll which is fixed upon sleeve 88. Sleeve 88 is rotatably mounted on fixed shaft 88 and has a loose fit in housing section 88. Also fixedly mounted on sleeve 88 is a brush holder 48, which is the same as in Fig. 7. Brush holder 48 rotates in housing section 9|. Adjacent section Si is partition section 20 which is exactly the same as in Fig. '7, having fixed in it the larger diameter portion 28 of shaft 89 and field cores and coils '28 to 36 inclusive, the latter not being seen in Fig. 8. Annular channel 81 holds the wires connecting the field coils. Section is is the same as in Fig. 7 with magnetic member 42 and impeller 48 inside of it. The action and connections of brushes 48, 50, i and 52 and commutator segments II, 54, 55, 56, 51 and 58 is the same as in Fig. 9 as far as magnetic member 42 is concerned.

I claim: 1. A magnetically driven fuel pump comprising a housing consisting of a plurality of sec- .tions, means for attachin the sections to each into the first and second sections, the impeller and the first of said members being rotatably mounted on the shaft and fixed to each other,

the impeller being driven by said first member, a brush holder and a plurality of brushes carried by the holder set in the second section adjacent the second of said members, the holder and said second member being rotatably mounted on the shaft and fixed to each other, commutator pieces for connection to a source of electric energy, in electrical connection with the field poles, fixedly mounted on a third section, the brushes, when rotating, sliding over the commutator pieces, for controlling their connection to the source, for effecting-thereby the rotation of the impeller.

- 2. A magnetically driven fuel pump comprising a housing consisting of a plurality of sections, means for attaching the sections to each other,

. -a centrifugal pump impeller and a magnetically influenced member rotatably mounted in the first of the sections, a brush holder and a plurality of brushes carried by the holder rotatably mounted in the second section, said first and second sections being hollow, a partition between said latter sections sealing off their interiors from each other, field poles and an axially extending shaft fixedly mounted in said partition, the shaft pro- Jecting into the first-and second sections, the impeller and magnetically influenced member being rotatably mounted on the shaft and fixed to each other, the impeller being driven by said member, mechanism for rotating the brush holder, the holder and said mechanism being rotatably mounted on the shaft in fixed rotative relation to each other, commutator pieces, for connection to a source of electric energy, in electrical connection with the field poles, fixedly mounted on a third section, the brushes, when I rotating, sliding over the commutator pieces for -a,sae,sao

controlling their connection to the source, for

effecting thereby the rotation of the impeller.

3. In a fuel system of an engine comprising a fuel pump including an impeller and having pipe means connecting said pump to a fuel source and to said engine, the improvement whichconsists in providing a drive for said impeller, comprising a permanent magnet armature rotatably mounted inside the system, the impeller being fixed to said armature, a permanent magnet armature rotatably mounted outside of the fuel system opposite the inside armature, a partition coming between said armatures, said partition completely sealing of! the fuel of the system from passing out therefrom, a plurality of field poles arranged substantially in a circle and mounted in said partition, one end of each pole facing the outside armature and the other end of each pole racing the inside armature, and commutator mechanism having a rotatable part fixed to the outside armature and a fixed part electrically connected to the poles, said mechanism, when receiving current, energizing the poles to produce a rotating magnetic field, said field dragging both armatures around with it, rotating the impeller thereby and effecting the flow of fuel in said system.

4. In the fuel system of an engine comprising a fuel pump including an impeller and having pipe means connecting said pump to a fuel source and to said engine, the improvement which consists in providing a drive for said impeller comprising an armature of magnetic metal rotatably mounted inside the fuel system, the impeller being fixed to said armature, an armature of magnetic metal rotatably mounted outside of the fuel system opposite the inside armature, a partition coming between said armatures, said partition completely sealing off the fuel of the system fromv mechanism havin a rotatable part fixed to the outside armature and a fixed part electrically connected to the poles, said mechanism, when receiving current, energizing the poles to cause rotation of the outside and inside armatures.

5. A magnetically driven fuel pump comprising a housing consisting of a plurality of sections, means for attaching the sections together, a centrifugal pump impeller located in the first of the sections, a, magnetically influenced member in said section fixed to the impeller for driving the .latter, mounting means in said section rotatably supporting the impeller and said member, a brush holder and a plurality of brushes carried by the holder located in the second section, mounting means in the second section rotatably supporting the holder, means for rotating the holder, a partition between said holder and the magnetically influenced member sealing ofl. the first and second sections from each other, field poles mounted in said partition in a ring opposite the magnetically influenced member, commutator pieces, for connection to a source of electric energy, in electrical connection with the field poles, said pieces being fixedly mounted in a third section, the brushes when rotating sliding over the commutator pieces controlling their connection successively to the'source, energizing the field poles to produce arotating magnetic field effecting thereby. the rotation of the magnetically influenced member and the impeller.

6. A magnetically driven fuel pump comprising a housing consisting of a plurality of sections,

,andseoond tatably supporting the impeller and member, a

second magnetically influenced member located in a second section. a partition between said magnetically influenced members sealing of! the flrst sections irom each other, fleld poles mounted in the partition in a ring between said magnetically influenced members, a brush holder, a plurality oi brushes carried by the holder, said holder being located in the second section and fixed to the second member, mounting means in the second section rotatably supporting the holder and the second member. commutator pieces, tor

connection to a source or electric energy, in electrical connection with the fleld poles, said pieces being flxedly mounted in a third section, the brushes when rotated by the holder sliding over the commutator pieces controlling their connection successively to the source, energizing the fleld poles to produce a rotating magnetic fleld eflecting thereby the rotation of the magnetically influenced members and the impeller.

7. In the fuel system of anengine comprising a Iuel pump including an impeller and having pipe means connecting said pump to a fuel source and to said engine, the improvement which consists in providing a drive for said impeller, comprising rotatably mounted magnetically influenced means inside the system, the impeller being flxed to said means. and an electric motor having an armature and the rotatable part or its commutator driven by said armature located outside or "the fuel system, and its magnetic fleld means fixedly located adjacent said magnetically influenced means between said armature and said latter means, said motor when supplied with current having its field means induce rotation in r 6 said magnetically influenced means edecting thereby the rotation 01 the impeller.

'8. In the iuel system 0! an engine comprising a fuel pump including an impellerand havingpipemeansconnectingsaidpumptoaiuel source and to said engine. the improvement which consists in providing a drive tor said impeller, comprising a permanent magnet armature rotatably mounted inside the system. the impeller being flxed to the armature. commutator mechanism, means for rotating part of said mechanism, a partition coming between said armature and said mechanism completely sealing oi! the fuel irom said mechanism, and a plurality oi cores and-held coils coming about said cores. the cores being mounted in said partition. one end or each core facing said armature, said mechanism having one part electrically connected to the coils and its other part when rotated and receiving current, energizing the cores to produce a rotating magnetic fleld, said field dragging the armature around with it, rotating the impeller thereby and eflecting the flow or fuel in the sys tem.

MORRIS KATCEER.

REFERENCES CITED The following references are of record in the tile or this patent:

UNITED STATES PATENTS

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