US2287369A - Pump - Google Patents

Description

Jung 23, 1942. SJF, ANDERSON 2,287,369

PUMP

Filed Jan. 51. 1930 s sheets-sheet 1 19 43 f1' je J4 z'* l 7]/ l/A'-.Z Y L l' Erw L I 2 E2! Q 611 l l Y Z1 42 f7 ,17

.- Patented June 23, 1942 UNITEDSTATES PATENT OFFICE vPUMP Swan F. Anderson, Rockford, Ill. Application January 31, 1940, serial No. 316,472

14 claims. (cl. 10s-136) This invention relates to pumps, and has special reference to a pump structure particularly well suited for handling semi-liquids or thick and viscous liquids, though equally capable of handling liquids of nigh uidity.

An important object of the invention is the provision .of a rotary pump of generally im- 'proved design including the provision of a simplied construction which may be made at lower cost, a construction which may be easily and thoroughly cleaned, and may be disassembled with a minimum of' eiort to accomplish the cleaning thereof, and including a novel arrangement of parts and a novel construction for preventing leakage from the pump.

Other objects and advantages will appear from the following description and the accompanying drawings, in which- Figure 1 is a side view showing one embodiment of my invention;

' Fig. 2 is an end view showing anadjusted position thereof;

Fig. 3 is a vertical section Ataken longitudnally through the pump;

Figs. 4 and 5 are fragmentary views through the spider hub showing the structure by which leakage is prevented; f

Fig. 6 is a section on the line,66 of Fig. 3; Fig. 6a is a diagrammatic View of a pump vane showing the structure thereof; i

Fig. '7 is a section on the line 1-1 of Fig. 3;

changing the speed of the shaft which projects therefrom to a speed different from that of the armature shaft. Attached to and forming the end wall of the gear casing I3 is a plate I4 hav- Aing an opening I5 through which a driven shaft I6 projects. Attached to the plate I4l is a U- Ashaped yoke designated generally by the numeral `I1 having a central portion VI8 and outwardly extending arms I9 and 2|. The central por' tion I8 is provided with a bore 22 through which the shaft I6 projects, and a counterbore 23 adapted to receive a boss 24 on the plate I4 for the purpose of locating the bracket with respect to the plate. The-bracket is secured thereto by a plurality of cap screws 25 `or by other suitable means. It will be understood, of course, that the yoke may take a number of different specific formsandthe arms may be cylindrical portions and still perform the required function.

Seated between the arms I9 `and 2| is a sleeve 26 having an annular end flange 21 and a portion 28A at the opposite end thereof, which porf tion is of reduced cross-section and seats within Fig. 8 'is a fragmentary top view showing the means for adjusting the vcapacity of the pump;

Fig. 9 is ra. side view of the pump spider, and Fig. 10 is a horizontal section taken longitudinally through a modiiiediorm .of the pump.

In the embodiment of the invention herein shown, the pump is attached directly to the hous- -ing of a motor, but in certain phases the invention is not limited to such a construction, but may be independently mounted and driven from a motor in the usual manner. The structure herein shown is designed particularly for the handling of ice cream and other dairy products. and thus has certain features directed to a socalled sanitary pump in which all of thepump k parts which come into contact with the matef sanitary solids in suchcorners. The numeral |I` designates a conventional electric motor, in this instance having an end bell I2 togwhich is attached a gear casing I3 for the purpose of the bore-22,.the endof'the sleeve being spaced ^from the bottom of the counterbore 23 a short distance as shown at 29 to provid? a narrow annular chamber 3l surrounding the shaft I6. The sleeve 26 has a bore 32 in the area 28 of reduced cross-section and a counterbore 33 of substantially greater diameter, the bore and counterbore being connected by a conical portion 34.*' The bore 32 is of slightly greater diameter than the shaft i6, (and the shaft is received therein.

The shaft I6 has a cylindrical portion 35 which projects slightly beyond the bore 32, as best shown in Fig. 3, and thereafter tapers inwardly shaft I6, whereby the hub portion 38 seats in the area betwen the squared portion 31 of the shaft and the counterbore of the sleeve 26. Preferably the hub portion has clearancey with respect to the counterbore of the sleeve 26,4 as best shown in Fig. 3.

The flanged end 21 of the sleeve 26 forms one end member of a pump cylinder which also includes a pump cylinder member designated gerithe nut 41.

erally by the numer'al 42 and an end plate 43. The cylinder member 42 has a depending lug 4 4 which seats freely in a slot 45 extending longitudinally of the leg 2| and has an upstanding pin 46 upon which is received for free rotation a nut 41 having a handle or lever and an exteriorly threaded offset sleeve portion 48 which seats in a threaded opening in the arm I9, which threaded tral bore 64 and laterally disposed iianges 65 and opening communicates with a longitudinally disposed slot 49 extending from the end of the. arm I9 inwardly. The Vupper'end of the pin 46H5 threaded for the reception of -a wing nut 5|| which co-acts with the nut 4.1 and threaded portion 48 to vary the position of the cylinder portion 42. The cylindernportion 42 has a shoulder 52 annularly of the pin 46 against which the lower end of the threaded sleeve'portion 48 seats, whereby upon jl-oosening of the nut 5| and rotation of the nut 41 in one direction, the cylinder member is forced downwardly with'respect to Figs. 3 and 6, and upon rotation of the nut 41 in the offset direction the cylinder member is moved upwardly with respectto the remainder of the parts. the purpose of preventing accidental rotation of The lug `44 serves to locate the lower end of the cylinder member .with vrespect tothe i The pin 46 is of slightly lesser diameter than the Width of the slot 49 wherebyupon removal of the nuts 4,1 and 5| the cylinder mem- The nut v5| alsoservesas a lock nut i'orA 66 provided with exterior threads 61 and 68 and l central passages 69 and 1| for the transmission of duid vto and from the cylindrical bore 64, which bore forms the chamber of the pump (note Fig. 6). As will be noted from Fig. 9, the spider portion 39 is of somewhat greater diameter than the hub portion 38 and is connected thereto by an arcuate shoulder 12 .extending annuiarly of the spider' member. The spider portion has in this instancefour vanes equally spaced around .the spider portion,` each o1' the vanesbemg seated in an opening 13. Each of these openings has parallelly disposed sides 14 and .15 adapted to bear against a vane 16 seated therein so as to substantiallyprevent the passage of uid along the interface Lbetween thev sides of the vane and the sides of the opening. y Each of these vanes has parallelly disposed sides 11 and 18 and aconvex edge 19 and a concave edge 8|. The convex edge- 19 of -the vanes. is adapted to bear against a plug 82 which is seated in an axial'bore 83 within o tact with-the loor'ev u.

ber may be moved endwise to remove the cylin;

der from the yoke, the pin 46 and the lug 4/4 moving through the slots 45 and 49. plate 43 is of generally cylindrical shape, as best shown in Fig. 7, and has a depending lug 58 received in the lslot 45 and an upstanding lug 54 freely received lin the slot 49, so "that the plate unless heldy as' presently described, can be re" moved by merely sliding the plate toward the left facing Fig. 3 until the lugs 53 and. 54 are disengaged from the slots 45 and 49.

The parts are held infassembled relation by a yoke bar 55 having a. thickenedcentral portion, the ends 56 and 51 of which are received in grooves 58 and 59` inthe arms 2| and I9, respectively, these grooves extending transversely to the slots 45 and 49. The bar 55 is of greater width than the width of the slots 45 and 49 so that there is The end the spider portion 99, the relationship of the parts being such that the edges 19 of all of the vanes are continuously in seating contact with the plug 82 to maintain the vanes in sealing con- Seated in the concave edge'8l ofv the vane isla rocker member 83 having an arcuate side corresponding in curvature to the concave edge 8| and an arcuate opposite side corresponding in curvature to the curvature of the bore 64' so that as the vane moves along the inner wall of they pump chamber,lthe rocker member rotates slightly against the convex edge whereby to maintain sealingI contact against the chamber wall throughout substantially the width 'of the vane.The concave edge 8| and the convex edge 19 of the .vane are generated about a single center 80a which falls on` the interface betweenthe rocker member 83y and the wall of the pump chamber, as indicated in Fig. 6a, and

throughthis arrangement the inner edge 19 of no possibility for the ends of-the bar being displaced through the slots. The yoke bar 55 has a threaded central opening within which is disposed a yoke screw .having a threaded portion 6| provided with a conicalpoint 62 and a handle portion 63;

In operation, the yoke bar 55 is seated against theend `plate V49 and rotated so as to bring the ends of the bar into the grooves 58 and 59 in the manner shown in Fig. 7. 'I'hereupon the yoke screw is rotated whereby to apply pressure to the end plate 43, which in /turn applies pressure to -the cylinder member 42 the pressure being transmitted therethrough to the vsleeve'26, whereby the parts are compressed andv Vwhilerlny operation.` l The cylinder member 42 has a cylindrical cen- 75 the vane, the plugy 82, the rocker member 83 and the innerl wall of the pump chamber are maintained in Contact throughout the fun circumference of the pump chamber, regardless of the elevation of the cylinder member and the consequent eccentricity of the spider member with `respect to the pumpchamber.

It will be seen thatup rotation of the shaft I6, the spider portion 39 and the lvanes incorporated therein are rotated through the action of the squared end/ 31. and the squared bore 4|. y

If the spider member is concentric with respect tothe chamber 64, as shown in Fig. 2, no pumping action will occur, but with eccentricity therebetween, for example, as shown in Fig. 6, liquid will be drawn. into lthe pump chamber through either the openings 69 or 1|, depending upon the direction of rotation of the shaft` and will be discharged throughvthe other of said openings.

While the ends of the spider portion I9 are adapted to seat in closerelationship with the end walls of the pump chamber, namely, the lnner faces of the end vplate 48 and flange 21 and the vanes are likewise adapted to seat in closely l fitting relationship therewith, yet in some circumstances a certain amount of leakage may occur andthe material may tend to pass outward along the hub portion 38. Novel'means are provided fo'r preventing this material from working inward along the cylindrical portionv I5 of the shaft I6, and for preventing its escape from the chamber. This means includes the conical. wall 94 commentingA the bore I2 and counterbore 33,

` 2,287,369 the sloping `shoulder 36 connecting the shaft portions 35 and 31, and also includes conical end ' walls 84 and 85 on the hub portion 38, which conical walls converge as shown at 86 (note Figs. 4 and 5). This structure produces ran annular chamber 8l, of V-shaped cross-section as shown in Fig. 5, the edge occurring at 86V being oppo-v site the space between the bore 32 and the cylindrical portion 35 of the shaft. Positioned in this chamber is a washer 88 of relatively stiff yetifflexible material, such, for example, as a fiber washer, the width'of the washer being such that when the parts are drawn into the operating position as shown in Fig. 3, the washer is distorted as shown in Fig. by action ofthe edge 86,.thereby producing an annular line 'of contact between the edge 86 and the center portion of the washer, between the conical wall 36 `of theshaft and the inner edge portion of the washer, and between the conical Wall 3d and the outer edge of the washer, these areas of contact being best shown isfactory structure for producing a seal at this` point such that the parts may-alsobe Jreadily disassembled, and' that this seal is highly effective for the purpose. However, I have pro: videdi vent opening gextending from the lowermost point in the chamber 3l to ytheyoutside so that should there be any escape of material-into the chamber 3l,vthis material may drain out through the opening 89 and thereby avoid the production of pressure within the chamber 3i which might force the material back 'into the motor through the bore l5.

The structure heretofore described v,and shown in Fig. 5. I have ,found that this is avery satface ofthe yoke. bar'55,` and by removing the nut 4I. Thereupon all of the parts of the pump .A

construction ,ofl the pump vane, the manner in. .which the capacity ofl the pump may be altered without disturbing other parts of the pump, andy similar features heretofore described.

I claim:

l. The combination in a demountable pump of a yoke comprising A'a central portion and spaced arms 'extending ltherefrom disposed inv parallel disposed spaced relation and/forming a 'fixed frame'for the pump, a pump casing comprising a one-piece cylinder of relatively thick rigid material disposed between said arms having piane ends, projecting portions lanchored in said arms to retain the same against rotation, andvlaterally disposed inlet and outlet flanges, a'rotaryi movable Vane impeller in said cylinder, an end memin Figs. l tog, inclusive, has the advantage ofV simplicity, but it will be noted from Fig. 6 that 'with movement of the cylinder' member 42,'the

connecting members 65 and 66 also `move upward and downward, which has the disadvantage in some vinstances ofA disturbing the pipe connections." Where this is-objectionable ra struc-,fl

ture such as 'shown in Fig. 10 may be employed, wherein comparable inlet a d outlet connections designated as 65a and 66a re providedon the -sleeve portion 26 (which may be integral with the yokeif desired), rather than on the cylinder ymember 42, and have openings 1 ia and 69a which Y rotation of the nut 4l, this capacity can be indi-y cated in the'manner shown in Fig. B, wherein the nut has an arrow or other indication as shown at 93 adapted to cooperate with a scale 94 positioned on the upper surface of the arm l.

It will be seen that the pump structure is parber disposed between one end of said cylinder and said central portion, sai-d end member and said frame being shapedffor reception of the end member in free locating abutment with said Y frame, an end member disposed against the opposite end of said cylinder shaped for locating abutment with respect to said arms, said end Imembers having plane accurately finished faces arranged to abut ythe ends of said cylinder in sealing relationship to form therein a pump chamber, and a clamp acting between said arms and the last mentioned endmember manually operable .to compress said end` members and said cylinder against said central portion to press said faces against the" ends of said cylinder member and thereby seal the junction therebetween Y against leakage, said arms and said clamp being the sole means for securing the parts together.

2. The combination in a demountable pump of a yoke comprising a central portion and spaced arms extending therefrom disposed in parallel disposed spaced relation andforming a vfixed-`l frame for the pump, a shaft extending through der being unobstructed for lateral movement of ti'cularly well adapted for the handling of viscous v or semi-fluid liquids. This particular pump is designed for the handling of icecream, but it should be noted that while designed for this purpose, it is equally Well suited for the handling of more fluid liquids. It will be seen that the pump can `be entirely disassembled or assembled by merely rotating the yoke screw lthrough a part of a turn or suflicientto remove theconical point 62 thereof to a point below the plane of the inner said cylinder with respect to said yoke, an end member disposed between one end of said cylinder and said central portion, said end member and said frame being shaped for reception of the` end member in free locating abutment with said yoke,

and an end member disposed against the oppomentioned endmembermanually operable to *y clamp being the sole means for securing the parts A together, and means acting between said cylinder rand one of said arms for securing said cylinder in any of a plurality of fixed `adjusted positions laterally between said arms.

3. The combination in a demountable rotary pump comprising a U-shaped frame having a cylindrical opening forming apump chamber,

end members having plane faces of substantially cylinder member with respect to the end ,mem-y ber, one of said end members seating in llocating abutment against said frame member, said y centralportion and spaced arms, a demountable pump casing-comprising an inner end member shaped to interni; with said frame adjacent thel bottom of the U-shaped frame, a cylinder member slidable from the open end of the frame into position against a face of said end member, said cylinder intertting with said arms to prevent rotation of the cylinder, and a second end member also slidable from the open end of said frame into position against the end of said cylinder to form a pump chamber and interfltting with said arms to prevent rotation of said second member, said casing having inlet and outlet ports to said chamber, the ends of said cylinder being' plane and the faces of said end. members contacting said cylinder being plane through an' area-substantially greater than the end of said cylinder, a clamp fitting between said arms and saidsecgreater area than the ends of said cylinder member shaped .to seat against the ends of the` cylinder member to complete the pump chamber and to permit sliding lateral movement of the casing having inlet and outlet Vports communicating with said chamber, and a quick releasable clamp acting between said arms andthe other of said end members to urge the end membersV against the cylinder and apply pressure therebetween to confine 'the cylinder member therebetween and prevent leakage from said chamber, arotatable vane type impeller within said pump chamber, and manually operable means for moving the cylinder member laterally between fixed operating positions to adjust the normal capacity of thepump. l

6. The combination in a demountable sanitary pump of a casing comprising a cylinder member having plane ends and an opening forming a I vpump chamber, and end members having plane faces shaped to seat against the ends of said cyl- 'inder member to confine the ends ofthe pump ond end member to urge said members into a'ssembled relation against said central portion of the frame, a rotary impeller in said cyhnder, means extending through the first mentioned end member for driving said impeller, and screw threaded 'means acting between said arms4 and said cylinder memberfor sliding said cylinder .member laterally between adjusted operating positions to vary the capacity of the pump.

4. The combination in a rotary type sanitary pump, of a casing comprising an end member having a plane face positioned to form one end; of a cylinder chamber and spaced arms integral therewith projecting therefrom, the oppositeV Aends of said arms being free, an end plate havl chamber and align the cylinder member, said casing 'having inlet and outlet ports communicating with said chamber,l a rotary vane type impeller in said chamber, spaced arms fixed with respect to one o! said end members, intertting shape characteristics on Asaid cylinder member and said armsA to prevent rotation of the cylinder member, clamp means acting between said arms and the other of said end members for confining ,the cylinder between the end members and ap- I plying pressure therebetween, and manually opo ber disposed between said arms having open ends provided. with parallel plane faces and .laterally disposed openings therein-providing inlets and outlets thereto, a flanged member seated in said to provide a metal to metal seal at the ends of Asaid cylinder, said casing having `inlet and outlet ports communicating with said chamber,l a ro` tatable pump member removably seated on said shaft within said cylinder member, the foregoing parts being shapedfor free reception one against the other along the axis of said shaft, said pump member being slidable onto said shaft over the end thereof and having vanes operative against the inner walls of said cylinder member, and means at the outer ends of said arms .urging the cylinder member, ,the rotatable pump member, and the end plate together into assembled relation with said shaft and Aagainst said end member to secure the pump in assembled, sealed relationship.

5. The combination in a demountable sanitary pump of a frame member having spaced arms, a pump casing comprising a cylinder member bel, tween said arms having plane ends and a central frame structure between .said arms in abutting relation with said frame structure and having a planesurfacedn metal to metal abutting felation with one end face of said cylinder member,

a rotatable vane impeller positioned 4in s'aid cylinderin endwise abutting relationship with said flanged member and said end plate, and quick releasable means acting between said frame and said end plate for urging together into sealed operative relationship said end plate, cylinder, flanged member, and rotatable vane impeller constituting all parts of the pump contacting `material being pumped, and for simultaneously said pump chamber,l spaced arms -flxed with'espect to one of said end members and having longitudinal slots therein, key means projecting from said cylinder member for reception in said slots to locate the cylinder member and prevent extending inwardly from the ends thereof, one of said slots terminating in a threaded `opening, a pump casing supported on said,y yoke comprising a cylinder member having projections on oprotation thereof, quick releasable clamp means 5 posite sides thereof receivable in said slots to acting between said arms and the other of said end plates for confining the cylinder between the end members and maintaining alignment thereof, and screw means acting between the projecting for moving the cylinder member laterally across said end member to vary the degree of relative eccentricity between the 'cylinder member and the impeller to change the capacity of the pump.

support the cylinder member and confine said. member against rotation, screw means acting between said threaded opening and vone. of said projections to-move said cylinder member transmeans of said cylinder member and said arms i0 versely of its axis to 'adjust the capacity of the pump, end members positioned to abut against the ends of said cylinder member to form a pump chamber, said casing having inlet and outletv ports communicating with'said chamber, quick 9. 'Ihe combination in a demountable pump of 1:,- acting- |means on said arms for urging said mema pump casing comprising a yoke having a central member and spaced arms integral therewith extending therefrom disposed in parallel disposed spaced relation and forming a fixed frame for the pump, a cylinder member of relatively u having an opening, said casing having inlet andA outlet ports communicating with said chamber, a shaft projecting into said chamber through said 5, opening, a rotary pump impeller positioned in said chamber and driven by'saidshaft, said end wall and said shaft each having walls diagonally .disposed with respect to the longitudinal center line of said opening shaped to provide a chamber arranged to abut the ends of said cylinder to 30 of V-shaped cross-section having the point thereclose the openings therein `and form a pump chamber, said casing having spaced inlet and outlet ports communicating with said chamber, a vane type impeller in said chamber, and a clamp tral member to press said faces against the ends of said end member and thereby seal the junction clamp being the sole means parts vtOEether.

10. 'I'he combination in a dmountable pump of a pumpcasing comprising spaced end memfor securing the of terminating at the interface between the shaft and said opening,..and a fiat ring of gasket maacting between said arms and thev last mentioned 35- tween the parts.

v13. The combination in a rotary pump of -a ycylinder member having a pump chamber, a

therebetween against leakage, said arms and said '40 hubl portion, and means for closing the end of the pump chamber comprising an end wall having 'an opening for said shaft, said hub, said end wall and said shaft being shaped to provide a chamber of V-shaped cross-section having the point bers having plane opposed faces and aheavy 45 thereofterminating at the interface betweenthe walled cylinder disposed between said facs having plane ends positioned to abut said plane faces to seal the ends of saidy cylinder and form a pump chamber, said casing having inlet and outlet ports to said chamber, a sliding vane type ro- 50 tary pump element within said cylinder, Aa shaft projecting through at least'oneof said end members to drive said pump element, means for urging .said end members together to press said faces against the ends of said cylinder and there- ,5 by seal the cylinder against leakage, said cylinder being the sole means for spacing said end members. and means for sliding said cylinder laterally with respect to said end members be-4 tions while so compressed to adjust said pump to preselected capacities.

11. 'I'he combination in a rotary pump of a yoke having a central -portion and parallel spaced arms, each of saidarms having open ended slots 6;,

, ber, a hub disposed within the end member and carried on said shaft, said hub having an end tapering' to a circular outwardly disposed edge opposite the junction between said shaft and said endv member, and a resilient distortable washer tween any of a plurality of fixed operating posi- G9 ring engaged at the midpoint of its periphery by said edge, the edges of said washer bearing against ysaid sloping surface and being distortedI by said edge'to close' the junction between the shaft and the end member. 1

. SWAN F.v ANDERSON.

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