US2203828A - Pump - Google Patents

Description

June 11, 1940. LARSON 2,203,828

PUMP Original Filed June 8, 1936 4 Sheets-Sheet l June 11, 1940- s. E. LARSON 2,203,828

PUMP

Original Filed June 8, .1936 4 Sheets-Sheet 2 force/01' enamel 17 j .2 1+ {P a 97 1 S. E. LARSON June 11, 1940.

PUMP

Original Filed June 8, 1936 4 Sheets-Sheet 3 s. E. LARSON June 1 l, 1940.

PUMP Patented June '11, 1940 PATENT OFFICE swan litLai-son, RockfordQIlL, assign or to Geo.

tion of Illinois Roper Corporation,Rockford, 111., a corpora- Original ,applicatioii June 8, 1936, serih No.

84,146. Divided and this application October 29, 1936, Serial No. 108,236 r i i 18, Claims. (01. 103-475) "This application is a division of my copending application Serial No. 84,146, filed June 8,1936, whichresulted in Patent No. 2,133,708, issued ctobei" 18, 1938.

s This invention relate'stoa newand improved a reciprocating pump, especially designed for use in a pump unit foradomestic water system but,

, oicourseicapable of a variety of uses.

The principal object of my invention is to provide a reciprocating pump inwhich aIl of the valves are congregated on a single plate disposed preferably in a vertical plane and assernbled remoi/ably between the body and face plate, whereby to insure the dropping away, from the valve seats of any solidsjwhichwould Otherwise prevent I a a closing ofthe valves, and also permit removal of the entire set of valvesat one time for inspection, repair or replacement. The platefcarrying the valve is also preferably porcelain enameled to Mresist corrosion and avoidsjticking. a

Ahother object is to providea reciprocating pump inwhich the liner for the cylinder is re-,.

I newable and mounted in afnovel mannerto facili tateitsyremovalwhen the face plateis off; Both 7 the valve plate andcylinder liner are easilyre ,l hqvable when, the face plate has been removed. @Other objectsandadvantages of the invention will j appear in the course of the following descr ption, in which reference is madeto thet'ac-r companying drawings, whereing Figurel isa front view of a punipunitejm bodyingfthe pump of my invention;

Figs. 3, 4 and5 are transverse vert i cal sections on, the correspondingly numberedlines of FigQZ; GisanedgeWise view of the valveplate showing thevalves thereon in side elevation; 7 isga section through one of the valves,

, a thems B,BcfFig.3, and j a a I a a Fig 3 is developed diagrammatic section to illustrate the water circuits in the pump.

, The same referencenumerals are applied to corresponding parts throughout the views.

The reciprocating pump of my invention is I2 forthe unit and carrying the storagetank I3 -5 thereonb The body or multi-chambered manifold 8 is a section through 11 air bleede r taken Ilof the pump forms one end of the base I2. The face plate I5 is also a multi-chambered casting'and fastened to the body I l, as by'bolts IE, to clampthe valve plate I'Iin place therebetween, together with gaskets 18 on the opposite sides thereof. "A web l9 connecting the tops of the body Mand housing I I is machined flat on top to provide a seat 20 whereon to mount the tank I I3 on a gasket 2|. ,In otherwords, the base I2 provides, in a single casting, the pump ID at one end and the drivingmechanism at II in the other end while at the same time alfording, support for the storage tank I3 ontop. The electric motor (not shown) "furnishing the power for the driving mechanism in the housing I I is supported on the 1,5.

opposite side'of the housing from that appearing aThecylinder 22 for the pump I0 is formed integralwith the body I4 at the center thereof, concentric with astuffingbox 23 provided in the 20 backwall of the body, and a removable plug 24 threaded in the front wall of the faceplate l5.

A sleeve 25 forms a renewable liner for the cylinder 22 and has a slip fit in the cylinder. The liner is externally threaded, as at '26, to receive a 25 flanged threaded collar 21. The latter is received in a central hole '28 in the Valve plate I! and is clamped between the gaskets I8 when the face plate I5 is bolted in place. Thus, the liner 25 can be removed and a new one inserted simply an by removing the faceplate I5 and, of course, the

,valve plate I! is also removable at that time, if desired. In the past, the brass liners were invariably pressed in, and hence it was very difficult to remove the same, and such repair jobs were 35 correspondinglyexpensive. Itiwas also common 1 practice to have the liners rolled over or belled out at the ends to make them tight, and that, U

of course, madeit so much more difficult to rea move the same A slip-fit cylinder liner clamped 40 in place, as herein disclosed, can be replaced in a small fraction of the time required for the old liners, and a great saving in expense'is realized for the user. I

29 is the pumppiston or plunger which is made up of oppositely facing cup leathers held together by a grommet 30 which is provided with a threaded bore in the rear end and a screw-driver slot in the front-end for threadedly securing the piston 29 on the 'reduced threaded front end of the rod 3i. --The latter is reciprocable in the stuffing box 23 and extends from the crosshead reciprocable in a guidein the housing II. 010- viously, when the-plug 24 is removed, the piston 29! is accessible and can be removed with the aid The valve plate ll, shown removed in Fig. 6,

and also appearing in Figs. 2, 7 and 9 is, of course, perforated to receive the bolts I6 for. fastening the face plate I5 to the body I4. The

valve plate I! is assembled in a vertical plane 7,

between the body I4 and face plate l5, so that any sediment that would lodge between the; valves and seats if the plate were horizontal,

will tend to wash down and leave the valve seats clean. In addition, it has ports therein to register with the ports 32-49 provided in the front wall of the body M, in addition to holes for ;.the

projection therethrough of small air bleed nozzles 4!] and 4!. There are four valves 42, 43, 44,-

and 46 on the plate 26 to control the flow of water through the ports 32, 33, 34 and 36, respectively. The advantage inhaving all ofthe valves on one removable plate is believed to be obvious: The valves 42--44 are on the rear side of the plate and serve-as checkvalves to prevent outward flow through the ports 32 34, respectively, whereas the valve 46 is on the front side and prevents inward flow through the port'36. The back wall of the face plate l5 has'ports 32'-38" registering with the ports 32-38, respectively. A strainer 41 is entered in the port 3! and is carried on a screw plug 48 removable from the face plate. A. passage 49 in the face plate communicates at its rear end with the port 39 inthe body' l4 and at its front end with a Valve seat 50 for a combination relief and drain valve 5! provided in ahollow boss 52 on the front of the plate l5. A drain pipe .53 extends from the 'boss 52 to the sewer or other drain receptacle. A hand operable plug 54 is screwed into the boss5'2 and forms a guide for the stem 55 of the valve 5| and an abutment for its spring 56'. -The plug isarranged to be threaded ina predetermined distance, asindicated in Fig. 2, to compress the spring 56 a predetermined amount to hold the valve 5! seated under such spring'pressure that it will open when a prede- 1 termined pressure is exceeded in the passage 49, as, for example, inthe event thepressure regulator switch for the drive motor fails to function. i Now, of course, one mayyback up the plug 54 sufficiently to unseat the valve 5! and thus use the valve as a drain cock, as, for example, when the pump unit is, to be drained for inspection, cleaning, or repair, or in the event the unit is to'be left standing out of commission for some time, and is accordingly drained to preventfreezing.

. The'body M has chambers A, B, C, and D pro-' vided therein. The front plate hasthree chambers E, Fyand Gin one plane, and a fourth chamber H in aforward plane communicating with the chamber G through the port 34". The

chambers B and F communicate. directly with the opposite ends of the working cylinder 22, that is, with. the opposite ends of the cylinder sleeve or liner 25. The chamber A communicates through the port 5'! with the storage tank 13. '53 is the water supply pipe extending to the well or cistern, and communicates with the chamber D in the body I4. 59 is the service pipe extending to the service system, and communicateswith the storage tank I3 through a cored passage 60 in the web IS. The circuit-for the water can now betraced: The incoming water from pipe 58 enters chamber D, as 'indicatedby' the arrow in Fig. 9, and passes through strainer 41 into chamber H and thence through port 34" into chamber G. Now assuming the piston 29 is moving outwardly, water is accordingly drawn chamber F;= The water drawn into" the rear end of cylinder 22 enters chamber B past check valve 44 from chamber G, as indicated bythe arrow. The water expelled from the front end of cylinder 22 into chamber F flows. from chamber F past check valve 43 into chamber A, the check valve 46 seating to prevent back-flow. The water forced into chamber A displaces other water from chamber A into tank l3 through port 51, the check valve 42 seating to prevent outward flow. There is an air dome '6l provided inside the tank IS in the form of a pipe closed at its upper end and threaded at its lower end in a socket provided therefor in the tank hold-down ,plateSZ, and communicating with the chamber A throughthe hole 63. This airchamber is to avoid waterchammer action and by incorporating it inside the tank greater: compactness and better appearance, are obtained. The water from port 5l finds its Way into the tank through the, passage'64 in the hold-down plate. On the return stroke of the piston 29, theiwater previously drawn inbehind the piston is expelled into chamber E and'flows through port 38' into chamber E and past check valve 42 into chamber A, as indicated by the arrow, the check valve-44 in this case seating to prevent outward and the-valve 43 likewiseseating to prevent tak-. ing water from: chamber A. Obviously, therefore, water is continuously being delivered under pressure from the cylinder :22 into chamber A alternately from oppositeends of the cylinder. It is clear thatthe strainer 47 catches any solid foreign particles therein, since-thewater entering chamber H fromchamber D has to pass through this strainer. The removalof the strainer by means of the plug 48 for cleaning at intervals keeps the/unit operating efficiently at all times. It is also clear how the combination pressurerelief and drain valve 5| operates, since ithas direct communication with the chamber A,

just described, and .hence communicates also with the storage tank l3. It shouldalso beclear thatthe nozzles 40 and 4|, being at a high level in the chambers E and F (Fig. 5), will serve to drain-the air out of these chambers in the filling of the pump unit with water, and'will thereafter bleed off any air thathappens tocollect in these chambers during the operation of the unit, so that the piston 29. will at no timebe air-bound and fail to pump water properly. In passing,

attention called to the ,plug 65 onthe face plate l5, (Fig. 1)-the removal ofwhich permits priming'the pump by filling-the chamber H and communicating chambers Gr and C through the inclined neck 66. v The valve plate H, in accordance with my invention, and as clearly illustrated in Fig. '7, is porcelain enameled alliover, as indicated by the numeral 61, the enameling extending into all of theports, as shown; Thispreventscorrosion and also gives the "advantage that the rubber disks .fi8 used inthe valves 42, 43,344, and 46 will not stickflthereto. Eiach valve comprises in addition .to the rubber disk 68 a coiled compression sp-ring 68 to hold the disk seatedmanda washer 10 to enclose the spring and provide not only a backing for the spring, but a limiting abutment for the valve disk to limit movement thereof away from i the plate. 1 Ascrew H passing through the plate l'l, spacer l2, and washer ldreceivesla nut 13 to complete: the assembly andpermiteasydisassembling for replacement of valve disks and springs when necessary; The surfaces of the plate 26 contacted by the gaskets ill have the porcelain enamel preferably etched with acid to roughen the same to make better joints with the.

. gaskets and lessen the danger of leakage.

The device appearingat Misan automatic float-operated air inlet valve, which in the event the usual water-level float rises" past a certain level, thus indicating the need for additional air,

opens" the valve andallows air to be delivered through the tube 15 to thechamber F, so as to be entrained with the water that is being forced into the chamber A and thence to the tank l3 in the operation of thepump.

It is believed the foregoing description conveys a good understanding ofthe objects and advan tages of my invention. The appended claims have been drawn with a view to coveringall legitimate modifications and adaptations.

Iclaim: 1. ma pump, a housing having chambers provided therein, a chambered platearranged to be detachably secured on said housing, a single valve plate interposed therebetween and having a plurality of spring-seated valves thereon controlling communication between chambers in the housing and chambered plate, apump cylinder. in Saidhousing communicating at one end with a 3 chamber insaid housing and at the other end with a chamber in said chambered plate, a piston reciprocabletherein; and means for detachably fastening said chambered. plate to said housing so as to detachably seoure said valve plate in plaeetherebetween. 3

2. A pump as set forthinclaim l including aplug removably mounted in an opening provided in said chambered plate in substantially concentric relation to said cylinder, said opening being larger in diarrieterthan the piston in said cylinder whereby to permit removal therethrough of said piston, said piston "being 'removably secured on apiston rod and adapted to be unfastened therefrom by access through said opening.

3. Apump as set forthin claim 1, wherein said valveplate is porcelain enameled on both sides and the valves engaging the same arerubber faced; 1 l

4. A pump as setforth in claim lyincluding a cylinder liner sleeve having a slip fit in said cylinder and receiving the'piston with a working fit therein, said sleeve being removable and adapted for replacement,arid an annular flanged collar fixed on said sleeve adjacentthe end of.

said cylinder and intermediate the ends of said sleeve, the flange being parallel with thevalve plate and arranged to be clampedbetween the chambered plate and housing when theiorrneri .is securedto the latter. 0 l l 5. .A pump as set forth in claim l, including a cylinder liner sleeve having a slip fit in said cylinder and receiving the pistonkwith a working fit therein, said sleeve. .beingremovable and adapted for replacement; an annular flanged. collar fixed on said sleeve adjacentthe end oif'said cylinder and intermediate'the endsof said sleeve,

the valve plate having an opening provided therein to receive said flange therein in the plane of. saidplate, and gaskets abutting both faces of said plate and flange andfcompressed between of the=formertothe latter.

I 6.- In a reciproeatingpump, a malnbody having the chambered plateand housing in the fastening an elongated cylinder bore provided therein, a

removable headfplate for said body, said body and plate havingchambers provided therein communicating with'opposite ends of said bore, an externally threadedcylinder liner sleeve having a piston reciprocab-le therein, and an internally threaded annularly flanged collar detachably threaded onsaid sleeve adjacent the outer end of said bore and intermediate the ends ofsaid' sleeve, the flange of said collar being parallel to a slip fit in said bore for removable entry therein,

the joint between the body-and plate and arranged to be clamped betweensaid parts in the fastening of said plate to said body. I

7.In a pump, a chambered body having a substantially centrally located cylinder therein on a horizontal axis, a piston reciprocable therein;

said body also having a substantially vertical side face, a valve plate disposed ina vertical plane in front of said faceia chambered face plate on the opposite'side of said plate from the bodyand arranged to. be secured to the latter so as to clamp the valve plate therebetween, gasket means between the body andvalve plate and between the valveplate and face plate compressed to prevent leakage when the faceplate is secured to the body, and valves Ion said valve plate. controlling communication. through holes provided in the plate between the chambers in thebody and iaceplate,all of said valves being disposed like the valve platein a vertical plane and arranged toengage valveseats provided on said plate, whereby to permitflescape by gravity of foreignmatter from between the valve plateand valves in the opening and closing of said valves.

a thin flat sheet metalplate perforated to provide a screw hole and one or more arcuate ports in substantially concentric relation with the screw hole, one face of the plate providing a valve seatsurface annularly with respect to the arcuate ports, a valve disk providing a flat face on one side thereof for fiuidtight engagement with the valve seat surface covering thea'foresaid arcuate ports, a screw entered through the screw hole from the opposite face of the plate and through a center openingprovided in said disk, a spacer sleeve entered freely in the center .hole in the .disk and abutting the plate on the same side therewith andhaving said screw extending therethrough, a washer mounted on the projecting end of said screw and abutting the outer end i of the spacer, and a coiled compression spring surroundingthe spacerand acting between the washer and valve disk to hold the valve disk normally seated on the plate, said plate being porcelain enameled on both sides and in the ports,

and said-valve disk being rubber faced for seal-,

ing engagement with said plate. a

--..10. A valve and valve seat. structure of the character described comprising, in combination,

hole and one or more arcuate ports in substantially concentric relation with the screw hole,

both faces of the plate providing valve seat surfaces annularly with respect 'to the arcuate ports, valve disks for cooperation with the valve seat surfaces, one at each screw hole, a screw entered through each screw hole from the oppoosite side of' the plate with relation to its associated valve disk and extending through a center hole provided therein, a spacer sleeve entered freely in the center hole in each disk and abutting the plate on the same side therewith and having the associated screw extending therethrough, a washer mounted on the projecting end of each screw and abutting the outer end of the associated spacer, and a coiled compression spring surrounding each spacer and acting between the associatedwasher and Valve disk to hold the valve disk normally seated on the plate, said plate being porcelain enameled on both sides and in.

the ports, and said valve disks being rubber faced for sealing engagement with said plate.

11. In a pump, a housing having chambers provided therein, a chambered plate arranged to be detachably secured onsaid housing, valve plate means interposed therebetween having a plurality of spring seated valves thereoncontroh ling communication between chambers "in the housing and chambered plate, said valve plate means providing a sheet metal wall between each pair of communicating chambers having one or more ports provided therein through Whiohthe communication is established and the wall also providing directly thereon valve seat, surfaces for engagement by the valves so as to" close the ports, a pump cylinder in said housing communicating at one end with a chamber in said housing and at the other end with a chamber. in said chambered plate, a piston reciprocable in said cylinder, and means for detachably securing the chambered plate tothe housing with the "valve plate means in place therebetween;

12. A pump as set forth in claim 11, wherein the sheetmetal wall between each pair of communicating chambers is porcelain enameled on both sides and the valve engaging :the rubbed faced. I

13. In a pump unit, comprising areciprocating multi-chambered pump housing and an operating crankshaft housing, pump mechanism in the first housing operatively connected with a crankshaft in the second housing, said mechanism including a working piston reciprocable horizontally in a cylinder in the-first housing, and a piston rod extending thereto from the second housing and operatively connected therewith, a removable cylinder liner for the cylinder slidably removable cured to said housing and holding said liner and valve plate in place, the valves in said plate controlling the flow of fiuid between-the chambers in the first housing and face plate induced by the movement of the piston in saidcylinder.

14. In a pump unit, comprising a reciprocating same is r multi-chambered pump housing and an operat'- ing crankshaft housing, pump mechanism in the said plate controlling the flow of fluid between the chambers in the first housing and face plate induced by the movement of the piston in said cylinder, and a plug removably received in an opening provided in said face plate in substan- .tially coaxial alignment with said piston and cylinderand of'larger' diameter than said piston, said plug when removed permitting access to the threaded member'and removal of the piston independently of removal of the face plate.

15; In a pump unit, comprising a reciprocating multi-chambered pump housingand an operating crankshaft housing,;pump mechanism in the first housing operatively connected with a crankshaft in the second housing, said mechanism including a,working.piston reciprocable horizontally in a cylinder in the first housing, a piston rod extending thereto from the second housing and having a threaded end, and a threaded member to fit said threaded end serving to fasten the piston thereon detachably, a valve plate carrying valves thereonandaremova-bly mounted on the front of the first housing,a renewable cylinder liner slidably removable from said cylinder, a chambered face plate removably secured to "said housing and serving to hold said valveplate and liner-in place, the valves in said plate controlling the flow of fluid between the chambers in the first housing andface plate induced by the movement ofthe piston insaid cylinder, and a plug removably received in an opening provided in said face plate in substantially coaxial alignment with said piston and cylinder and of larger diameter than said piston, said plug when removed permitting access to the threaded member andremoval of the piston independently of removal of the face plate.

16. In a pump unit comprising a reciprocating pump housing and an operating crankshaft housing, pump mechanism in the first housing operating in connection with the crankshaft in *the second housing, said mechanism including a working piston reciprocable horizontally in a cylinder in the first housing, the piston comprising opposed cup leathers, a piston rod extending thereto, from the second housing and having a threaded end, and athreaded member at the stantiallyv coaxially aligned therewith and of larger diameter than said piston,'the removal of which plug affords access to said threaded memher to permitremovalof the piston.

17. A pump as set :forth in claim 1, including a plug removably mounted in an opening provided in said chambered 'plate in substantially concentric relation to said cylinder; said opening being larger in diameter than the piston in said cylinder whereby to permit removal therethrough of said piston,lsaid piston having a central fastening member thereon detachably threaded on the end of the piston rod and adapted to be unthreaded therefrom by access through said opening. l v y l 18. In a pump, a chambered body having a substantially centrally located cylinder therein in coaxial relation to and projecting from the body, a piston reciprocable therein, said body also having a fiat outside face, a sheet metal valve plate disposed in aplane in front of said face having a central opening to receive the projecting portion of the cylinder, a chambered face plate on the opposite side of said sheet metal valve plate from the body and arranged to be secured to the latter so as to clamp said sheet metal plate therebetween, gasket meansbetween the body and sheet metal plate and between the sheet metal plate andface plate compressed to prevent leakage when the face plate is secured to the body, said sheet metal plate having openings provided therein in circumferentially spaced relation around the aforesaid cylinder to establish communication between chambers in the body and chambers in the face plate, the aforesaidcylinder having communication at opposite ends Withcertain of said chambers, and valves mounted on said sheet metal plate arranged to cover and uncover said openings in the reciprocation of the aforesaid piston.

SWAN E. LARSON.

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