US 1789611 A
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Description (OCR text may contain errors)
Jan. zo, 1.931. j (c. w..v g- MNST 1,789,611 PW Fiid otfzef- 192e 2 shuts-snm 1 www@ Jan. 20, 1931. c. Iw. VAN RANsT 1,789,611
Filed Oct- 29,l 1926 72 ShetS-Sheet 2 i y l fis/ i u y. J3- y //7 Patented Jan. 20, 1931 CORNELIUS W. VAN BAN'ST, DE TROIT, MICHIGAN rtm1" application mea october 29, 1920, serial 116.145,018.
The invention relates ,to pumps. and more particularly to a device embodying an electromagnetic actuating means. While the invention in its broader aspects may be' apple vto a great variety of uses, theembodiment herein described is especially adapted for conveying liquid fuel from a supply tank to the carburetor of an' internal combustion engine.
The primary object of the invention 1s to provide a device which will operate for long periods of time without adjustmentor repair and which is composed of parts easily and cheaply manufactured, that can be assembled without requiring appreciable individual ad- ]ustment to insure proper operation.
` Another object is to provide a construction in which the movable contacts -for the electromagnet are housed in a separate portion ofthedevice spaced from the portions contamlng the fluidpassageways and arranged above the same toavoid all danger of fouling thecontacts in case of'slight leakage.
A Jfurther object is to provide a construction having a separate detachable unit form# ing a reservoirand ilter, said unit being arranged on the opposite side of the pumping unit means.
These and other objects are 'attained by employing the construction hereinafter described and illustrated in the accompanying drawings, wherein Figure 1 is a 'vertical section through a pump embodying my invention, the upper 'sy r portion of the section being taken on the line 1--1 of Figure 5 and the lower portion taken 4on the line 1`1 of Figure 3; Figure 2 is a side viewv ofthe lower p0rtion of thepump looking toward the. righthand side of Fig. 1;
Figure 2a is a side view-ofthe upper portion of the pump looking toward the 'leit-k handside of Fig.y `1, the-top casing being in section;
Figure' 3 is a plan view of the body to which from the electromagnetic actuating.
outlet check valve.
the actuating mechanism and the iiuid reservo1r are attached;
' Figure 4. is a section of the body taken on d the line 4-4 of Figure 3;
Figure 5 is a top plan view of the device 50 with the top casing removed; `f
Figure 6 is a bottom plan view of the body;
Figure 7 is adiagramniatic view illustrating the pump applied to a motor vehicle for forcing liquid fuel from the supply tank to the engine carburetor;
Figure 8 is a view of the valve spring; Figure line 9--94 of Fig. 5;
. Figure 10 is a. diagram of the electrical 60 connections; v y
Figure 11 is an enlarged fragmentary sectional view on theline 1-1 of Figure 5.
Referring now to the construction lillustrated in the drawings, vthe device-is composed of a body 10 to which is attached on the upperl side the` electromagnetic operating mechanismdenoted generally as 11 and on the bottom the sediment chamber denoted generally .las 12. The body of the device is referably formed as an aluminum die cast- 111g, both because of its inherent. lightness and its cheapnes's from 'a production standpoint. The body is generally of cylindrical outer contour provided with laterally extending bosses 13 for attachment to theengine casing vand the inlet and outlet nipples 14 and 15 respectivel for attachment to the Huid stem. The inlet nipple 14 communicates with a chamber 16 formed i' the body and 80 closed at the lbottom by means of a Hubbard' plug 17. The top surface 18 of the body has an alerture 19f therethrough leading to the cham er 16 and adapted' to receive the inlet check valye. v Th surface is also provided 85 with the bore 0l extending completely through the body and adapted to receive the The-displaceable umping element utilized in this deVicePre erably lcomprises a bel- '90 9 is a fragmentary section on the I lows 21 formed in the usual manner with the corrugated side walls 22 permitting an axial expansion and contraction of the element. The bellows is securely attached to l theupper face18 of the body with its open end 1n communication with the inlet and outlet apertures 19 and 20 and the closed end extending' upwardly. In the preferred a conduit 27 which .has itsupper or'tion rel turn bent as indicated at 28 to'fit tl e counterbore 29`in the body and has its lower end 30 rojecting downwardly into the 4chamber 16.
l he conduit 27 is retained in position by having a closeit with the counterbore 29 and the upper portion of theV conduit forms a seat for receiving the inlet valve 31. The valve preferably comprises a disk 32 to'which is attached centrally a spring arm 33, preferably formed as shown in Fi ure 8 b bending over a tongue 34 of a su stantia ly cir! cu ar spring washer 35. The circular portion of the washer is adapted to seat upo'n the annular shoulders 36, thereby normally pressingthe disk valve 32'againstthe up er portion ofthe conduit 27. The outlet fiom the bellows is throu h a conduit 37 vextendin into the upper en thereof and leading downwardly intothe passageway in the body. As shown,'the body is providedl with' a circular recess 38 for receivin .a disk 39 attached tothe conduit 37 an seating on an annular' shoulder 40. The outlet valve 41 l may be' constructed lsimilarly to the inlet valve,'the circular' portion `in this case seating on the annular shoulder 42 ofthe body -and the disk seatin upon a cup-shaped insert 43 p w intot e bore orpassageway 20. l `The sediment chamber 12 comprises a-bowl or receptacle45, preferablyof glassor other tremblant material which is seated on an ann gasket46 and retained in position b suitable clamping means indicated at .4 l Within the bowl 45'is arranged a cylindrical lter screen.48,'which,as lshown is provided with the upper and lower heads 49 and 50 re. lpectively.- imperforate conduit 51A extends through the cylindrical filter. screen and projects upwardly therefrom for engagement with the bore 52 in the body, the' atter being a continuation of the passageway 20. The filter-screen -vs also heldin potion by means of'a' coil spring'liv arranged between i l the lower head 50 and the bottom of the bowl be clamped securely toi lows.
the electromagnet comprises a disk 64 attached ward movement of the armature, strikes an 45. 54 'is an upwardly turnedannular Harige projecting from the upper head 49 of the lter screen and this engages a bore 55 in the body leading to the outlet nip le 15'. The
body 10 is provided 'with a cham er 56 com- 7 0 vmunicating' 'with the bowl 45 and extending communication with the liquid so thata steady flow of liquid through the device may be maintained without noise.
The actuating mechanism for the device is mounted on a lshell .58, the lower portion ofwhich engages the top surfacevof the body 10 and surrounds the bellows 21 and its retaining means. The shell is preferably permanently secured to the body by the turned in flange 59v and the shell is thereby secured-to the body independently of the mounting of the bel-A 'The shell has an .upper cylindricalJ portion 60 closed at itsupper end and adapted to receive the electromagnet 61. The mag- 95 net'comprises a cylindrical core 62 secured to the upper portion of the shell 60, the coil 63 being wound about the central core and filling the space within the shell. The armature of to the upper vend of the,v bellows 21 and arranged adjacent the lower end of the core 62. The armature is provided with an annular. raised portion or bead 65 which, lin the upannular washer 66 of suitable resilient material, such as* leather or cork, thereby preventing metal to metal contact and insuring quietness of operation.` 67 is a rod secured to the upper end of the bellows and extending through. a longitudinal passagewa 68 lt-hrough the center of the core 62. Su cient clearance is provided so that the rod is entirely free to reci rocate in the passageway without striking t e sides. thereof. The rod is formed with a portion of reduced diameter lat its u per end on which is. mounted a spool 69 pre erablv formed of insulating material and provide with upper and lower annular y disks 70 and 71. The spool seats upon the 120 annular shoulder 72 and'is resiliently'urged l ina downward 'direction by means of a flat leaf. spring 73,A the free end 74 of `which' is apertured at75 to fit over'the projecting end o the rod 67. The spring has a return-bent portion 76 rigidly secured to a' bracket 77, 1 which in turn is attached to: the top of the y casing 60. The bracket is also provided with an upwardl extending' portion 78 arran ed l atghtangestotheportion77andf rming l y i: w,
, vided with enlarged apertures 100 through the l support for the breaker arm 79. The breaker arm carries atits free tact points 80 and 81 arranged side by side. The arm has downturned side flanges 83 extending to a point adjacent the bracket 78 and is also provided with a central slot 84 forming the bifurcated ends 85 and 86. These bifurcated ends extend around the spool '.69 and are inserted between two insulating blocks 87 and 88, thelatter being secured to the bracket 78 by means of the rivets 89. 90 is a fiat sheet metal piece also arranged between the insulating plates 87 and 88 and providedwith a forward 'extension 91 extending between the bifurcated ends 85 and 86 and forming a terminal to which the magnet wire 92 is connected. The-piece '90 also has another projection 93 forming the support for a vertical member 94 around which i's wound an electrical resistance 95. The member 94 is preferably of insulating material and has its lower end supported on the magnet shell 60.
For positioning the piece 90 between the insulating blocks the upper block is provided with-two apertures 96 and 97, vvhichjare engaged by struck-up projections 98 and 99 on the member 90. This member also is prowhich the rivets 89 pass without contact.
For cooperatingwith the contacts 81 and 82 there is another set of contacts 101 and 102 carriedby a spring arm 103. This spring arm is secured tothe side of the magnet casing 60 and'is outwardly bent at 104, return-bent at 105 and upwardly bentv at 106, extending to a point beneath the spool 69. The spring arm 'is preferably slotted at 107 forming two independently flexible portions respectively carrying the contacts 101 and 102. A flat leaf spring 108 is also secured to the side of the casing and the free end thereof bears inwardly against an insulating member 109 mounted on the free end' of the breaker arm 79. Y This f spring therefore has a frictional engagement vgr with the'breaker arm and tends to restrain the movement thereof, v The spring arm 103 1s electrically connectedk to one end of the resistanc 95, the other end of the resistance be.
ing connected to the member 90, which in turn is conneted to the breaker arm 79.
lThe electrical connections are illustrated most clearly in Figure 10 where it willbe observed that the spring arm `103.is rounded fon the shell of the device. v Electriccurrent may be obtained from the battery 110, or
other source of power, the circuit being through switch 111, magnet coil 63, contact 81, contact 10.1, and spring arm 103 to the separated, the circuitis completed through the resistance 95which is suiicie'ntly high to reduce the current flowing through the circuit toa very sfmall'value. The use of the resistance, however, reduces the arcing be# end two conoud. When the'lcontacts 81"and 101 are lof an internal combustion engine 1n order to deliver fuel theretoifro'm a fuelrsupply tank. In this figure Ifthe pump is rep-resented at 112, the inlet being connected'by a conduit 113 to the supply tank 114 and the out/let being connected by conduit -115 to the carburetor 116. The carburetor is shown as being providedwith the intake manifold 117 lead inv to the engine 118. Q, l
he operation of the device is as follows; The armature 64 is normally held in its lower position by the spring arm 73 and in this 4position the bellows isl contracted. When the electromagnet is energized through a suitablecontrolling switch 111, the circuit is completed through thecontacts and the armature is drawn upwardly, thereby expanding the bellows. The motion of the armature being communicated tothe spool 69 causes the same to move upwardly, but due to the lost motion connection between the-breaker arm 79 and the spool, the breaker arm is not immediate-ly actuated and the contacts remain in engage-` ment. This is facilitated by the retarding action of the spring arm 108 and also by the upward pressure of thel contacts 101 due 'to the resiliency of the spring arm 103. When the lost'motion is taken up and .the lower flange 71 of the spool strikes the breaker arm 79,`the latter is positively moved upward, and since it has a. longer leverage than the spring arm 103 carrying the lower contacts. a separation of the contacts takes place and t-he circuit through the electromagnet is broken. The armature is thereupon moved in the reverse direction under the inuence of the fla-t spring 73 and when the` lost motion of the spool and breaker arm is again taken up, the arm is moved downwardly Vuntil the contacts again come into engagement. This cycle is' repeated, causing an alternate expansion and contraction ofthe bellows.
. Vhen the bellows is expanded, theliquid is drawn through the inlet chamber 16, conduit 27 and inlet valve 32 into the .interior .of the bellows and whenthe bellows is again contracted, thevliquid is expelled through the conduit 37, outlet valve 43 andfconduit 51 into the bowl 45. From the bowlthe liquid passes through the cylindrical filter screen 48 up through the outlet 55-to the'fo'utlet nipple 15.
of the stroke of the bellows, itis necessary that thev same be completely lilled with liquid at' all times, and'to insure that this condition exists the outlet from the vbellows is by means of the conduit 37 which extends to In order-to secure the maximum eiciency the extreme upper portion of the bellows. Furthermore the upper portion of the bellows is of small cross sectional area and these two factors combined insureI that no air or gas will be present within the bellows during its operation. On the other hand, it is also important that a gas cushion be provided both on the inlet and outlet sides of the pum ,this being secured by providing the cham er 28 surrounding the inlet valve and the chamber 56 above ythe Huid bowl.
The device embodying my invention differs from all other devices of the same general character in that it has only one place where there is any friction ybetween the movableparts of the mechanism and that is between v the spring arm 108 and the breaker -arm 79;
In this place the areas withstanding the friction are so large and the pressure is so small that in the operation of the pump it is not possible to-detect any wear whatsoever. It will also be noted that the armature which actuates the bellows is free from bearings of any type, the lower portion of the armature and the shaft supported thereby being held and supported by the bellows 21 and the upper ed of the shaft being located centrally by the fiat spring 73. 4 The shaft 67 does not comein contact with the core of the magnet and is free to move up and down without any friction or wear on any of the parts. This is a very important feature and is a great improvement over other devices which are pro- `vided with bearings for which no means of lubrication are furnished. Such construntions are therefore a possible failures. c
Another feature of my construction is that the breaker mechanism including the contacts are arranged at the top of the device so that if there is any leakage olgasoline in the pump or around the` pump, there is no danger of the liquid" coming in contact with the breaker .inlet andA outlet passageways, g tween said dan points and interferingwith theirn operation.
. What I claim as my invention is:
1. In a ump, the combination with a pump body aving inlet and outlet fluid passageways therein, check valves in said passageways, an annular bellows having an open end provided with an annular ange'extending radially outward, means for securing said annular .flange to said pump body whereby said open en is in communication with said a gasket beand body, an annular shell surrounding. said bellows and secured to said bodyindependently ofsaid bellows, and electromagnetic actuating mechanism for said bellows carriedby said shell. i
2. `In a ump, t e combination with a body therein,` che ck valves in said'passageways,"an
source4 of trouble apd communicating with the interior o et and outlet uidlpassagewaysand secured to said body independently of net', arod extending upwardlly from said i armature through said longitudinal passageway, a contact arm mounted on the exterior of said shell above said magnet, and means on said rod for actuating said contact arms.
3. In a pump, a bellows having a lower stationary` and an upper movable end, an
inlet opening to the lower part of the bellows,
and an outlet comprising a conduit extending 4upwardlyinto said bellows, and means for actuating the movable end of said bellows. 4. In a. pump, a bellows'having a lower stationary and an upper movable end, an`
inlet openingto the lower part of the bellows, and an outlet comprising'a conduit extending upwardly into said bellows, and an electromagnet located above said bellows and coin-v prlsing an armature connected vto the movable end of said bellows for actuating the same.
5. A pump com rising a head, an expansi-v ble member seate thereon, the upperendof which is movable,` a liluidreceptacle seated against the lower side of said head, a hollow screen having a closed lower end located with-l in said receptacle, the upper end of thescreen being seated against said head, an inlet to said expansible member, an outlet therefrom comprisin screen an an outlet from said rece tacl su screen, whereby-the liquid is caused to flow throiigh said screen.
6.' "pum a pipe leading through said p comprisingv a head, an expansii ble member seated thereon, means eratin said member, arliquid receptacle rdetachaly seated against the lower side of said head and communicating with said expansible member, an inlet passage to said expansie' ble memberjand an outlet cle passing through said head.
7. A pump comprising'a head, an expansible member seated thereon, means for o eratin said member, a liquid receptacle etachab y against the lower side of said head, la 'hollow screen detachably seated for opsaid .head ,within said receptacle, an et to s a'id ansible member, an voutlet therefromv to said receptacle, and an'outlet from said rece tacle communicating with the interior of sai -screen *whereby the liquidisv caused to How through said-screen.
' -8 .v Ina'. pump,.a bod having inlet and outlet rta, an 1lalz'pansi l'e member :seated on sai body','an' et chamber. in said body in communlcationwi-thsaid inlet' port and havinge passage communicatingwith said ex.
screen, and an outlet one side of said pansible member, a conduit having its lower end portion projecting within said chamber and having its upper open return bent portion secured to the walls of .said passage and a check valve in said passage above said conduit.
9. A pump comprising a head, an expansible member seated thereon, means for operating said member, a liquid receptacle seated against the lower side of said head and communicating with said member, an inlet to said expansible member, an outlet from said receptacle, and a chamber in said head opening into said receptacle and hav- 'ing its top portion extending above said outlet and entirely closed, thereby forming an air4 trap for retaining a gaseous cushion above the liquid in said receptacle.
10. In a pump, the combination with a body having inlet and outlet passageways therein, a bellows secured on said body to communicate with said passageways and having its closed end ofreduced cross 'sectional area and extending upwardly to a point slightly above the main portion of the bellows, and a conduit on said body having its lower end communicating with said outlet passage and its upperend opening into the reduced portionof `said bellows and means for operating said bellows.
11. A pump including in combination a head, an expansible member associated with head, a chamber associated with the other side of said head, ahollow screen within said chamber, an inlet to said expansible member, an inlet to said chamber comprising a pipe passing through said from said chamber communicating with screen lwhereby thev liquid flowing through said chamber is caused to flow through said screen. A.
12. A pump including in combination, a head, an expansible member associated with one side of said head', a chamber associated with the other side of said head, a hollow screen within 'said chamber having closed upper Vand lower ends, a spring interposed between the' end of said screen and one end of saidchamber for yieldably retaining said screen in position, an inlet to said expansible member, an inlet to said chamber comprising a pipe passing through said screen, and an outlet from said chamber communicating with the interior of the screen whereby the liquid flowing through saidchamber is compelled to flow through said screen. v
13. A pump .includingin combination a head having inlet andY outlet passages, a transparent chamber on one side of said head, an expansible member on the other side of said head, and means for actuating. saidl expansible member to eiect a flow of liqui from'said inlet passage through. said. trans-V parent chamberl to said outlet lpassa-ge.
end provided with an let passage of said head.
the interior Aof thev member and head' cooperatin d v pumping chamber communicating with said pelledto pass through said screen,'an expansiblev member on the other side of said head and in communication with the` inlet passages of said head and chamber, and means for actuating said expansible member to effect a flow of liquid from the inlet of said head through said chamber to the out 15. A pump including head having inlet and outlet passages, a
screen in said chamber, said screen having closedA ends, a pipe passing through said screen. and forming an inlet passage for said chamber, an outlet .fromfsaid chamber communicating with the interior of said in combination, a
chamber on one side of said head, a hollow screen, an expansible member associated with said. head and communicating with the iiilet passages of said head and chamber, and
means for actuating' said expansible member j to eiect a flow of liquid from the inlet passage of said head through saidchamber to the outlet passageof said head.I v
16. In apump, a head having inlet and outlet passages, an expansible member associated with said head and communicating with said passages for drawing. a fluid through said inlet passage and forcing the same out through said outlet passage, and a globe associated with said head and comiaun'icatingwith one of said passages where- .Y flow 17. A pump,
from the inlet to the outlet passage.
comprising a head 'having a passageway therethrough, an expansible member seated on said head, an inlet to said expansible member, said expansible member and head cooperating to form a pumping chamber communicating with said inlet and passageway, means for operating said member, a liquid receptacle, in said receptacle having closedupper and lower ends, a pipe leading through Said screen and secured'to'the closed ends there of, said pipe having a portion extending above the upper end of the screen and projecting within the passageway in said head, an xoutlet from said 'receptacle covered by said screen, and resilient meansfor detachably retaining lsaid screen against said head.
18. A pump, comprising a head having a passageway therethrough, an" expansible member seated on said head, an inlet to said expansible member, said expansible to form a inlet and passageway, means'for operating said member, a liquid receptacle, a hollow the luidpasses through said globe in -its l a hollow screen withf screen within said receptacle having closed upper and lower ends, a ipe leading through "said screen and'secured) to the closed ends thereof, said pipe havin a. portion extending above the upper en of the screen and Erojecting within the passagewa in Said ead, an outlet from said receptac e covered by said screen, and a. coil spring interposed between thebase of said receptacle and the lo lower endsof said screen for detachably retaining said screen against said head.v
In testimon whereof I aix my si ature. CORNLIUS W. VAN RA ST.