US2420556A - Pump - Google Patents

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US2420556A
US2420556A US511577A US51157743A US2420556A US 2420556 A US2420556 A US 2420556A US 511577 A US511577 A US 511577A US 51157743 A US51157743 A US 51157743A US 2420556 A US2420556 A US 2420556A
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impeller
annular
buckets
heads
shaft
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US511577A
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Alexander V Mueller
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Deming Co
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Individual
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00Pumps with circumferential or transverse flow
    • F04D5/002Regenerative pumps

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  • This invention relates to, a rotary pump of the type having an impeller between two heads which are in close proximity to the faces of the impeller, and anobject of the invention is to provide means for increasing the efficiency of such a pump by preventing or greatly reducing leakage between the heads and impeller.
  • the invention relates to an
  • impeller pump having a rotary impeller with an annular row of vanes or buckets adjacent its periphery, such impeller being mounted between two frame members which stand adjacent the impeller and one or both of which cooperate with the buckets andI extend across the periphery of the impeller and carry an annular water passageway with which spaced intake and discharge passages communicate.
  • frame members or stationary heads stand very close to the face of theimpeller, while out of contact therewith, and hence there has been always some leakage between the faces of the impeller-and the heads, reducing the efficiency of the pump.
  • this leakage water frequently carries grit4 with it which scores the faces of the'impeller and progressively diminishes its effective operation.
  • My invention provides pressure seals having annular faces which are maintained in actual contact with the faces of the impeller by continuous pressure, with the result that the' leakage and consequent scoring is practically eliminated.
  • My invention provides also means to prevent leakage between the pressure seals and the stationary frame members in which they are mounted. Accordingly, leakage is prevented around the exterior of the seals, as Well as between them and the impeller. These features have a further advantage of avoiding the requirement for stuiiing boxes about the shaft to prevent leakage from thepump. f Y
  • Fig. 1 is peller, the plane ofl the section being indicated f by the line Sf-3 on Fig. 1;
  • Fig. i is a fragmentary radial section through a portion ofthe impeller averticai axialV sec- ⁇ tion through one embodiment of my impeller and the cut-water or stop-block between the intake and exit passages, as indicated by the linel 4--4 on Fig. 2;
  • Fig. 5 is a perspective of the cutwater block detached and inverted;
  • Fig. 6 is-a vertical axial section (partly broken away) through a modified formof pump having my invention.
  • the frame of the pump comprises a vertical ring-like member I0 having a suitable base portion II and carrying at the top a hollow discharge chamber I2, which may be integral with the ring of the frame or attached thereto.
  • This view shows two end members I3 and I4 which abut the sides of the frame ring I0 and are secured thereto, 4cap screws 20, passing through flanges I5 and I6 on the end members, being shown for this purpose.
  • Each of the frame members I3 and I4 is shown as cupshaped and formed at its central region into a sleeve portion I1 and I8 carrying a bearing for the shaft; suitable ball bearings 23 and 24 being shown in the drawing.
  • FIG. 30 indicates the driving shaft of the pump which is mounted in the two bearings 23 and 24.
  • This shaft carries the impeller 40 which coacts with members to-be described.
  • the impeller is shown as keyed at 4I to the shaft and longitudinally positioned by being mounted between a pair of sleeves 32 on the shaftI which are forced against the impeller by nuts 33 screwing onto threaded portions 34 on the shaft. This makes a simple construction rigidly securing the impeller to the shaft in the desired position while enabling ready installation of the impeller on the shaft or its frame portion I8 across the other end of the shaft.
  • the impeller 40 is of a general disc form, and carries an annular row ofbuckets ⁇ adjacent its periphery.
  • the actual form or direction of the buckets may Yvary and they kmaybe on one or both sides of the impeller, as desired.
  • These heads are mounted within the frame ring I and abut eachother at their inner faces. 'I'hey are shown as abutted at their outer faces by the ends of the frame members I3 and I4. These heads therefor when the pump is assembled constitute part of the stationary frame of the pump.
  • the frame member I3 may be bolted snug without gaskets against the ring I0, but I prefer to employ a gasket (indicated at 28 in Fig. 1) between the flange of the frame member I4v and the central ring member, as that is the frame member which would be removed to obtain access to the pump.
  • the heads 50 are symmetrical, each formed with smooth nearly annular faces 5I adjacent its periphery, which faces abut each other tightly.
  • grooves 52 which coact to make the annular passageway in which the buckets travel.
  • 'I'his annular passageway leads from an intake passage 54 communicating with the suction or supply chamber 55 of the pump.
  • Another nearly radial passageway 56 leads from the annular raceway 52 to the discharge port 51 in the frame ring and thence to the discharge chamber I2.
  • the socalled cut-water separating these passages may comprise a bifurcated block 60 (Figs. 2, 4 and 5) occupying the raceway in this location and straddling the-impeller and thus blocking the passage of liquid about the impeller -buckets from the discharge passage to the intake passage, except such small amount as may be carried by the ⁇ buckets 42 themselves moving past the block.
  • each vframe head 50 with a cylindrical bore, which may be of substantially the same diameter as* that of the impeller body between diametrically opposite vanes, and in these two circular openings I mount two annular pressure heads or seals which fit slidably in the bores and have smooth inner faces contacting with the faces of the impeller. Each of these heads is pressed into actual contact with the impeller and constantly maintained in such contact.
  • I provide a pair of yielding pressure devices acting against the outer faces of the seals.
  • I have shown, for this purpose, a pair of helical compression springs 80 whichbear 4 at their inner ends against the respective pressure heads and at their outer ends against abutments carried by the frame, for instance, webs I9 on the frame members I3 and I4.
  • two pressure heads may be of hardened metal or other wear resisting material and have their inner faces polished or lapped in so as to be very smooth and in contact directly with the smooth face of the impeller, which is preferably of bronze.
  • the smooth face of the impeller which is preferably of bronze.
  • packing rings 90 which seat in grooves in the respective seal rings and coact with the frame heads 50.
  • the packing rings may be of any suitable material. If of rubber, they may well extend radially beyond the bore of the frame members 50 and coact with the inner faces thereof, as shown in Fig. 1. Where the :packing rings cross the cutwater block 60 they occupy rabbets 62 formed in the block, as illustrated in Figs. 4 and 5.
  • the sealing rings may be of such material, or have such inner faces, that no lubrication between them and the impeller is necessary. However, I have made provision for supplying lubricant to these faces.
  • the latter passages preferably extend inwardly diagonally and carry internal threads 21 for the application of ny suitable oiling coupling.
  • the heads 50 in one region may have lugs 59 occupying recesses in the pressure heads to prevent any circumferential displacement of the heads, so that communication of the lubricating passages 15 and 58 is assured.
  • FIG. 6 I have illustrated another embodiment of my invention wherein the pump casing. the shaft carried thereby and the impeller and liquid passageways are similar to those already described, but wherein the stationary frame heads and sealing means they carry are specically different through operating in the same general manner as in the first embodiment.
  • Fig. 6 90 indicates the ring-like central frame with its discharge chamber 9i 92 and 93 indicate the side frame members; 94, the shaft heads
  • 00 specifically differ from tl'.: corresponding members 50 of the first embodiment, as will now be described.
  • Each of the frame members ,I00, while having the same inner .face as hereafter described, has
  • the spring bellows I 25 constructed as heretofore described, surrounds this flange I2I and bears at its outerend against the threaded sleeve
  • 20 furnish means for adjusting the compression of the spring bellows
  • 20 does away. with the possibility of the rubber spool of the spring bellows contacting with the rotating shaft and being worn thereby.
  • 0 is intended to have its threads fit with sufficient snugness so that it will remain in place without the necessity of a jam nut, and this sleeve nut accordingly furnishes effective means for adjusting and maintaining the desired pressure of the sealing ring against the impeller.
  • lubricating means illustrated in Fig. 6 is also specifically different from that heretofore described.. These comprise merely diagonal paslow pressure region. This loss cannot be avoided, ⁇
  • 50 through the annular extensions
  • Such passageways may terminate at their outer ends in internally threaded portionsforthe application of suitable nipples. Lubricant inserted through these passageways may if desired fill the annular spaces about the exterior of the spring seals. Suitable passageways
  • 50 are shown in the plane in ⁇ which the section of Fig. 6 is taken, though such openings may be in zero at the intake and the pressure builds up gradually around the periphery of the impeller, reaching a maximum at the discharge.
  • a 2 In a pump, the combination of a rotary impeller having an annular row of vanes and having smooth faces on its opposite-sides between the vanes and the axis, means defining a passageway in which the vanes travel with intake and exit passages to and from said passageway, a pair of movable pressure heads engaging said smooth faces of the impeller, and means for'maintaining said heads in such engagement.
  • a rotary impeller having parallel fiat faces on its opposite sides and carrying a row of laterally open buckets beyond said faces, means defining an annular passageway in which said buckets travel, intake lfand exi-t passages communicating lwith said annular passageway, a pair of sealing rings having :dat inner surfaces contacting with the sides of the impeller, and a pair of pressure devices acting on the respective rings to maintain said rings in contact under pressure against the opposite faces of the impeller.
  • a rotary impeller having faces on its opposite sides and carrying a row of buckets beyond said faces, means defining an annular passageway in which ,said buckets travel, intake and exit passages communicating with said annular passageway, a pair of heads having smooth inner surfaces automatically pressed into contact with the sides of the impeller, and a pair of yielding annular members preventing leakage across the perimeter of the respective heads.
  • a rotary drive shaft and an impeller thereon having a smooth side face and an annular row of buckets entirely beyond said face, stationary means deiinng an annular passageway in which the buckets travel, intake and exit passages communicating directly with said passageway, a sealing ring engaging said smooth face vof the impeller close to the inner periphery of the buckets, and a spring surrounding the shaft and compressed respective- 1y between said ring and a stationary abutment,
  • a pump the combination of a rotary drive shaft and an impeller thereon having lrow of buckets beyond said faces, a pair of stationary heads of annular form having mating grooves to provide a passageway 'about said buckets and intake and'exit passages to and from said passageway, and a pair of movable pressure heads mounted within the stationary heads and surrounding the shaft and contacting with the opposite faces of the impeller, and yielding means ⁇ for maintaining the movable heads pressed. against the impeller.
  • a pump the combination with a frame'Y a shaft carried thereby, an impeller on the shaft having fiat sides with an annular row of buckets beyond said at sides, a pair of stationary abutting heads in annular form on opposite sides of the impeller, said heads being recessed to dene a passageway extending about the impeller buckets and on each side thereof and beyond the periphery of the impeller, said heads having also outwardly extending notches to define intake and discharge passages, there being means separating said passages beyond the periphery of the impeller, a pair of annular pressure heads surrounding the shaft and mounted within openings in the stationary heads and engaging opposite sides of the impeller, and spring means acting on said pressure heads ic maintain the heads in snug engagement with the sides of the impeller.
  • an impeller having an annular row of buckets adjacent its periphery and having smooth faces between the buckets and axis
  • stationary means defining a- Y passageway occupied by the buckets with intake smooth faces on its opposite sides and an annular row of buckets beyond said faces
  • stationary means dening an annular passageway in which the vanes travel, intake and exit passages communicating directly with said passageway, means for blocking the space between the intake and exit passages beyond the periphery and at the sides of the impeller buckets, and a pair of movably mounted heads engaging opposite faces of the impeller, and a pair ofsprings surrounding the shaft and compressed respectively between one of said heads and stationary abutments, whereby said heads are maintained Iin snug engagement with the sides of the impeller.
  • a pump the combination of a pair of frame members in face abutment providing an annular passageway with intake and exit ports, a rotary impeller mounted at the axis of said annular passageway and having an annular row 1 of buckets in said passageway and a smooth face between the buckets and axis, a pressure head slidably mounted within one of said frame members and having a smooth inner face engaging said smooth face of the impeller, and yielding means acting on the pressure head to maintain such engagement.
  • a pump of the character described the combination of a shaft, an impeller thereon having smooth opposite side faces and an annular and discharge passages to and from said passageway, said means having openings about the axis of the impeller, a pair of pressure heads mounted in said openings 0n opposite sides of the impeller, spring means for maintaining the pressure heads in contact with the smooth faces of the impeller, and annular yielding members closing the spaces between the perimeter of the pressure heads and the openings in the stationary means which they occupy.
  • a pump the combination of a frame, a pair of coacting stationary heads carried thereby having aligned cylindrical openings, said heads providing an annular passageway beyond said openings with intake and discharge passages leading to the exterior, a shaft coaxial with said cylindrical openings, an impeller on said shaft having an annular row of laterally open buckets in said annular passageway, said annular passageway being interrupted beyond the periphery of the impeller and at the sides of the buckets between the intake and discharge passages, a pair of pressure heads slidably mounted in the cylindrical openings of said stationary heads and abutting the opposite faces of the impeller, springs for maintaining the pressureheads in snug contact with the impeller, and an annular packing between lthe pressure rings and said stationary heads to prevent leakage from the annular passageway across the outer perimeter of the pressure heads.
  • a pump the combination of a rotary shaft, an impeller mounted thereon and having smooth opposite faces and an annular row of buckets beyond the faces, a pair of annular frame members on opposite sides of the impeller having mating annular grooves to provide a raceway for the impeller buckets. admission and discharge passages leading from said raceway to the region beyond the perimeter of said annular frame members, means carried by the latter separating the admission and discharge passages, a pair of anmaar pressure heads slidably momies exclusively said annular frame members and engaging the rounding the shaft and compressed between the,
  • a pump the combination of a shaft, an impeller thereon having at oppositefaces and an annular row' of laterally open buckets Ibeyond said flat faces, a pair of abutting stationary heads having mating grooves to provide a passageway about said buckets and intake and exit passages to and from said passageway, a pair of frame members abutting the outer sides of said heads and holding them againsteach other,
  • a vertical frame member having a supporting base and carrying a discharge chamber at the top and hav. ing intermediately a horizontal opening, a pair of mating frame heads mounted in said opening and abutting each other, the opposed faces of the heads being grooved to provide an annular passageway with intake and discharge passages to the exterior ofthe heads, said discharge passage communicating with the discharge chamber and there being means separating thedischarge passage from the intake passage, a pair of frame members of cup-shape facing inwardly and abutting the outer faces of said annular frame members, said cup-shaped frame members being bolted to said vertical frame member, the cupshaped frame members carrying bearings f or a drive shaft, a shaft mounted in said bearings, an impeller mounted on the shaft having an annular row of buckets, occupying the annular passageway of said annular frame heads, a pair of annular sealing rings freely surrounding said shaft and slidably mounted in said frame heads, a pair of compression springs surrounding the shaft and each compressed
  • f means for adjusting the pressure of said seal.
  • a pump the combination of a pair of frame members having bores and -grooved inner faces and means for holding the members in face abutment to define an annular passageway. there being intake and exit passages communicating with the annular passageway.
  • a shaft atthe axis of said bores, an impeller on said shaft having an annular row of buckets adapted to travel in said annular passageway, pressure seals surrounding the shaft and each including a compression spring and a head bearing against a side of the impeller, said frame members carrying extensions internally threaded about the axisl of the shaft and spaced therefrom, and externally threaded sleeves occupying such internally threaded openings and bearing against the outer ends of the pressure seals to force the same against the opposite sides of the impeller.
  • a pump the combination of means defining an annular passageway for liquid, an im peller having an annular row of buckets operating in said passageway, a shaft carrying the impeller, a pressure seal surrounding the shaft and comprising a spring-extended bellows terminating in an annular member having its outer periphery of no greater diameter than the inner periphery of the row of buckets and bearing against the impeller, a ring with a cylindrical flange, said flange surrounding the shaft and occupying the interior of the bellows and the ring extending across the outer end of the pressure seal, and adjustable means engaging said ring to apply a variable compression to the spring to adjust the pressure against the impeller.
  • a rotary impeller having an annular row of buckets
  • a frame member having in one face an annular ,groove to form a wall for an annular passageway in which the buckets operate.
  • said frame member having an opening, a sealing head slidably occupying saidcopening andA engaging lthe side of the impeller, a yielding member between the outer perimeter of the seal head and the wall of said opening to prevent liquid passage between them, and means for maintaining the head in contact with the impeller while the latter is running.
  • a pump the combination of a rotary shaft, an -impeller thereon having an annular row of buckets, a stationary frame member ⁇ surtlonary means providing a raceway V:Ifor the im v peller buckets, admission and discharge passageways leading fromv said raceway outwardly to the region beyond the periphery of said impeller.
  • the combination 'of'.-rotary 11npeller carrying anV annular row of buckets. means -deflning a passageway' forliquid in which said rounding the shaft and having in one face an annular groove to form a wallfor an annular passageway in which the buckets operate, said frame member having a bore concentric of the shaft, a sealing ring slidably occupying said bore and engaging the side of the impeller, there being clearance between the outer periphery of the sealing ring and the bore of the frame member, and a.
  • a rotary impeller having a row of vanes at its periphery providing an annular row of buckets distant from the axis of the impeller and means preventing leakage along the face of the impeller from buckets containing fluid of lower pressure
  • a sleevelike member contacting the impeller adjacent the bases of the buckets, and means to prevent leakage between said sleevelike member and a member with which it frictionally coacts to prevent leakage between them while allowing relative rotary movement.
  • a rotary impeller having an annular row of buckets, means dening a passageway in which the buckets travel and means preventing leakage from a bucket containing uid under higher pressure to a bucket containing fluid of lower pressure via the face of the impeller, said means including a seal in contact with the face of the impeller adjacent the base of the buckets, there being a slipping engagement between the face of the seal and a member of the pump and yielding means comg prising a spring for maintaining such slipping engagement snug during rotation of the impeller.
  • a pump the combination of a shaft, a rotary impeller thereon having a row of vanes at its periphery providing an annular row of buckets distant from the axis of the impeller, a device for preventing leakage from a peripheral region of higher pressure along the face of the impeller to a peripheral region of lower pressure comprising a sleevelike member surrounding the shaft and contacting the impeller adjacent the bases of the buckets, a compression spring sur rounding the shaft, and an abutment surrounding the shaft and serving to compress the spring against said sleevelike member to maintain the latter member in slipping engagement with a member of the pump between which members there is relative rotary movement.
  • a pump the combination of a rotary shaft, an impeller thereon having an annular row of vanes adjacent its periphery providing buckets open at the side of the impeller, said impeller having a smooth side face between the buckets and axis, means dening a passageway in which the vanes travel, a movable sealing member having a smooth face engaging the side face of the impeller within the circle defining the bottom of the buckets, and a yielding pressure device maintaining such sealing member in contact with the impeller.
  • a drive shaft having a smooth side face and carrying a row of buckets beyond said face open at their outer side, means defining an annular passageway in which said buckets travel, intake and exit passageways communicating with said annular passageway.
  • a sealing ring contacting with the side face of the impeller within the circle defining the bases of the buckets close to the bases oi the buckets, and a compression spring surrounding the shaft and maintaining said sealing ring in slipping contact under pressure with a member between which there is relative rotary movement.
  • a rotary impeller having vanes providing an annular row of laterally open buckets, means defining a passageway in which the impeller vanas travel.
  • a seal member engaging the face of the impeller between its axis and its vanes and having its outer periphery'adjacent the inner periphery of the buckets, and means preventing leakage from said passageway across the perimeter of said seal member.
  • a pump the combination of means dening an annular passageway with intake and exit ports, said means including a frame member with a bore, a rotary impeller mounted coaxially with said bore and having an annular row of buckets in said annular passageway and a smooth face between the buckets and axis, a round sealing ring slidably mounted in said bore and having a smooth face, means for maintaining said smooth faces in actual contact while the impeller ls rotating, and means preventing leakage across the periphery of the sealing ring.
  • a frame member having an opening through it, one face of said member forming a wall for an annular raceway, a rotary impeller having an annular row of open-sided buckets traveling in said race- Way, a pressure seal continuously pressed against the face of the impeller adiacent the bases of the buckets, a cross member carried by said frame member and means mounted in the cross member for adjusting the pressure of the seal against the impeller.
  • a frame member having an opening through it, one face of said member forming a wall for an annular raceway.
  • the other face of the member having a projecting annular flange, a rotary shaft, an impeller thereon having an annular row of buckets traveling in said raceway, a pressure seal surrounding the shaft within said annular iange and engaging the face of the impeller, a spring bearing against the pressure seal, a. stationary cross member carried by the annular ange and surrounding the shaft, and means on the cross member for compressing the spring to maintain the seal continuously pressed against the impeller.

Description

May 13# 1947- A. v. Mur-:LLr-:R 2,420,556
4 PUMP Filed Nov. 24, 1945 5 Sheets-Sheet l May 13, 1947'.
A. V. MUELLER PUMP Filed NOV. 24, 1943 3 Sheets-Sheet 2 INVENTOR. www Namen Y @la money! May 13, 1947.
A. V. MUELLER PUMP Filed Nov.- 24, '1943 3 Sheets-Sheet 3 IN VEN TOR.
ALB/mNof/Y M/Iafufn feb/f '.v 7155 Patented May 13, 1947 PUMP Alexander V. Mueller, Salem, Ohio, assigner to The Deming Company, Salem, Ohio, a corporation of Ohio Application November 24, 1943, serial No. 511,577
(cl. s- 96) 31 Claims.
This invention relates to, a rotary pump of the type having an impeller between two heads which are in close proximity to the faces of the impeller, and anobject of the invention is to provide means for increasing the efficiency of such a pump by preventing or greatly reducing leakage between the heads and impeller.
More particularly, the invention relates to an;
impeller pump having a rotary impeller with an annular row of vanes or buckets adjacent its periphery, such impeller being mounted between two frame members which stand adjacent the impeller and one or both of which cooperate with the buckets andI extend across the periphery of the impeller and carry an annular water passageway with which spaced intake and discharge passages communicate. In pumps of this type it has been customary to make the frame members or stationary heads stand very close to the face of theimpeller, while out of contact therewith, and hence there has been always some leakage between the faces of the impeller-and the heads, reducing the efficiency of the pump. Furthermore, this leakage water frequently carries grit4 with it which scores the faces of the'impeller and progressively diminishes its effective operation.
My invention provides pressure seals having annular faces which are maintained in actual contact with the faces of the impeller by continuous pressure, with the result that the' leakage and consequent scoring is practically eliminated.
My invention provides also means to prevent leakage between the pressure seals and the stationary frame members in which they are mounted. Accordingly, leakage is prevented around the exterior of the seals, as Well as between them and the impeller. These features have a further advantage of avoiding the requirement for stuiiing boxes about the shaft to prevent leakage from thepump. f Y
IMy invention 'is hereinafter more fully expl-ained in connection with preferred embodiments thereof, illustrated in the drawings, and the essential novel features are summarized in the claims.
In the drawings, Fig. 1 is peller, the plane ofl the section being indicated f by the line Sf-3 on Fig. 1; Fig. i is a fragmentary radial section through a portion ofthe impeller averticai axialV sec- `tion through one embodiment of my impeller and the cut-water or stop-block between the intake and exit passages, as indicated by the linel 4--4 on Fig. 2; Fig. 5 is a perspective of the cutwater block detached and inverted; Fig. 6is-a vertical axial section (partly broken away) through a modified formof pump having my invention.
It will be convenient to describe first the general construction of the pump illustrated in Figs.
1 and 2, before taking up the features constitut- J.
ing my invention. It should be understood, however, that the invention is not coni-ined to the pump construction illustrated.
In the form shown in Fig.'1, the frame of the pump comprises a vertical ring-like member I0 having a suitable base portion II and carrying at the top a hollow discharge chamber I2, which may be integral with the ring of the frame or attached thereto. This view shows two end members I3 and I4 which abut the sides of the frame ring I0 and are secured thereto, 4cap screws 20, passing through flanges I5 and I6 on the end members, being shown for this purpose. Each of the frame members I3 and I4 is shown as cupshaped and formed at its central region into a sleeve portion I1 and I8 carrying a bearing for the shaft; suitable ball bearings 23 and 24 being shown in the drawing. n
30 indicates the driving shaft of the pump which is mounted in the two bearings 23 and 24. This shaft carries the impeller 40 which coacts with members to-be described. The impeller is shown as keyed at 4I to the shaft and longitudinally positioned by being mounted between a pair of sleeves 32 on the shaftI which are forced against the impeller by nuts 33 screwing onto threaded portions 34 on the shaft. This makes a simple construction rigidly securing the impeller to the shaft in the desired position while enabling ready installation of the impeller on the shaft or its frame portion I8 across the other end of the shaft.
` The impeller 40 is of a general disc form, and carries an annular row ofbuckets` adjacent its periphery. The actual form or direction of the buckets may Yvary and they kmaybe on one or both sides of the impeller, as desired. I have shown buckets made by radial notches 42 in vopposite sides of the impeller, the notches on veither side leaving between radial vanes 43. i
These vanes'operate in` an annular passageway provided by two stationary heads or frame members 50. These heads are mounted within the frame ring I and abut eachother at their inner faces. 'I'hey are shown as abutted at their outer faces by the ends of the frame members I3 and I4. These heads therefor when the pump is assembled constitute part of the stationary frame of the pump.
The frame member I3 may be bolted snug without gaskets against the ring I0, but I prefer to employ a gasket (indicated at 28 in Fig. 1) between the flange of the frame member I4v and the central ring member, as that is the frame member which would be removed to obtain access to the pump.
The heads 50 are symmetrical, each formed with smooth nearly annular faces 5I adjacent its periphery, which faces abut each other tightly. Within the nearly annular regions 5I, and opposite the buckets 42 and beyond the periphery of the impeller, in the form shown, are formed grooves 52 which coact to make the annular passageway in which the buckets travel. 'I'his annular passagewayleads from an intake passage 54 communicating with the suction or supply chamber 55 of the pump. Another nearly radial passageway 56 leads from the annular raceway 52 to the discharge port 51 in the frame ring and thence to the discharge chamber I2.
Between the intake or suction passage 54 and the discharge passage 51 is mounted the socalled cut-water separating these passages. This may comprise a bifurcated block 60 (Figs. 2, 4 and 5) occupying the raceway in this location and straddling the-impeller and thus blocking the passage of liquid about the impeller -buckets from the discharge passage to the intake passage, except such small amount as may be carried by the `buckets 42 themselves moving past the block.
I have given above a description of the particular pump illustrated in Figs. 1 and 2 of the drawings in order that the application and function of the sealing means constituting my .nvention about to be described may be better understood. Such sealing means, however, is capable of a wide variety .of applications to impeller pumps differing materially from that above specifically described.
Heretofore in impeller pumps such as above described it has been customary to extend the stationary heads 50 inwardly close to the face of the impeller and continue them into a region near 'the shaft, where they have been provided with external stuilng boxes preventing discharge of the water which necessarily leaked inward between the impeller and such stationary heads. In my invention, however, I eliminate the leakage and the necessity of the stufilng boxes by a novel construction at the sides ofthe impeller, which I will now describe.
I provide each vframe head 50 with a cylindrical bore, which may be of substantially the same diameter as* that of the impeller body between diametrically opposite vanes, and in these two circular openings I mount two annular pressure heads or seals which fit slidably in the bores and have smooth inner faces contacting with the faces of the impeller. Each of these heads is pressed into actual contact with the impeller and constantly maintained in such contact.
To effect thc pressure of the heads or seals 10 against the impeller, I provide a pair of yielding pressure devices acting against the outer faces of the seals. I have shown, for this purpose, a pair of helical compression springs 80 whichbear 4 at their inner ends against the respective pressure heads and at their outer ends against abutments carried by the frame, for instance, webs I9 on the frame members I3 and I4.
of the coil spring to expand.
'I'he two pressure heads may be of hardened metal or other wear resisting material and have their inner faces polished or lapped in so as to be very smooth and in contact directly with the smooth face of the impeller, which is preferably of bronze. In such construction there is no annular space between the inner faces of these pressure seals and the faces of the impeller and, hence, no leakage about the impeller face from a region of higher pressure to a region of lower pressure.
To prevent leakage of the pumped liquid from the annular raceway across the outer perimeter of the pressure heads I provide suitable packing rings 90 which seat in grooves in the respective seal rings and coact with the frame heads 50. The packing rings may be of any suitable material. If of rubber, they may well extend radially beyond the bore of the frame members 50 and coact with the inner faces thereof, as shown in Fig. 1. Where the :packing rings cross the cutwater block 60 they occupy rabbets 62 formed in the block, as illustrated in Figs. 4 and 5.
The sealing rings may be of such material, or have such inner faces, that no lubrication between them and the impeller is necessary. However, I have made provision for supplying lubricant to these faces. Thus. as shown in Fig. 1, I have provided oil passages 15 in the pressure heads, shown as communicating with passages 58 in the frame heads, which latter communicate with oil passages 26 in the central frame member at the base of the discharge chamber I2. The latter passages preferably extend inwardly diagonally and carry internal threads 21 for the application of ny suitable oiling coupling. By this means, I can readily supply lubricant to the faces of the impeller in the region of its engagement with the pressure heads.
The heads 50 in one region may have lugs 59 occupying recesses in the pressure heads to prevent any circumferential displacement of the heads, so that communication of the lubricating passages 15 and 58 is assured.
In Fig. 6, I have illustrated another embodiment of my invention wherein the pump casing. the shaft carried thereby and the impeller and liquid passageways are similar to those already described, but wherein the stationary frame heads and sealing means they carry are specically different through operating in the same general manner as in the first embodiment.
In Fig. 6, 90 indicates the ring-like central frame with its discharge chamber 9i 92 and 93 indicate the side frame members; 94, the shaft heads |00 seat within the ring Opening of the v frame 90 and abut each other on their inner 92 and' 93. The stationary frame members |00. however, specifically differ from tl'.: corresponding members 50 of the first embodiment, as will now be described.
Each of the frame members ,I00, while having the same inner .face as hereafter described, has
on its outer side an annular projecting portion to the outer face of which is secured a stationary frame ring |05. lThis maybe attached to the annular extension by cap screws |00. Threaded within the plate is an externally threaded sleeve I I0. The inner end of this sleeve abuts a ring |20 which hasa cylindrical flange |2| loosely surrounding the shaft. The spring bellows I 25 constructed as heretofore described, surrounds this flange I2I and bears at its outerend against the threaded sleeve |I0, indirectly through the ring |20, and at its inner end against the annular sealing"` head |30, the inner face of which coacts' with the side of the impeller after the manner of ment. i Y
The threaded abutment sleeve I0 and the ring |20 furnish means for adjusting the compression of the spring bellows |25 to adjust the pressure of the seal against the impeller. The flange |2| on the ring |20 does away. with the possibility of the rubber spool of the spring bellows contacting with the rotating shaft and being worn thereby.
The spring sleeve I |0 is intended to have its threads fit with sufficient snugness so that it will remain in place without the necessity of a jam nut, and this sleeve nut accordingly furnishes effective means for adjusting and maintaining the desired pressure of the sealing ring against the impeller. There is a clearance space |3| at the inner periphery of the seal ring sufficient to receive the cylindrical flange |2I, so that a considerable adjustment of the spring bellows is permissible.
' In either `embodiment illustrated. due to they the ring 10 in the first embodi- 6 any other location about the axis of the shaft. as will be readily understood.
smoothA engaging surfaces of the impeller and the sealing pressure heads, and the lubricant if employed, there is very little actual friction between the rubbing surfaces, and the wear is negligible, though the heads are constantly maintained in liquid tight. engagement with the impeller. As the pressure heads are self sealing. there is vpractically no leakage along the face of the impeller from any region of higher pressure to one of lower pressure and the emciency is thus increased, and the troublesome scoring which has taken place in the past is eliminated. The efliciency is further increased by the annular packing, preventing leakage about the exterior of the seals. As the leakage is prevented both along the impeller face and also along the outer periphery of the pressure heads, I do away with the necessity of stufllng boxes coactingwithy the ports. In such a pump the pressure is practically The packing between the seal rings and the the wall of the bore of theeframe member |00 which is occupied by the sealing ring` after the manner of a piston in a cylinder. However, I prefer to allow clearance, indicated at |02 about the seal-head periphery, so that the face ofthe seal head may automatically adapt itself tothat of the impeller without requiring the maximum accuracy in the bbre of the frame head.
The lubricating means illustrated in Fig. 6 is also specifically different from that heretofore described.. These comprise merely diagonal paslow pressure region. This loss cannot be avoided,`
sageways |50 through the annular extensions |0| on the frame members |00. Such passageways may terminate at their outer ends in internally threaded portionsforthe application of suitable nipples. Lubricant inserted through these passageways may if desired fill the annular spaces about the exterior of the spring seals. Suitable passageways |35 through the seal heads them` selves may convey lubricant from such annular spaces to the faces of the seal rings. For convenience of illustration diagonal passageways |50 are shown in the plane in `which the section of Fig. 6 is taken, though such openings may be in zero at the intake and the pressure builds up gradually around the periphery of the impeller, reaching a maximum at the discharge. Hence, at every region of the periphery of the propeller, there is a tendency of liquid to pass via the flat side of the impeller from every region about the impeller (except the region which happens to be at the intake opening) to other regions where the pressure is lower. In the ordinary pump of this type. the heads are made to stand as close as practicable to the sides of the impeller and still .leave sufficient clearance to prevent contact,
and hence, au` around the impeller liquid will be forced by the built-up pressure into the annular space at the sides of the-impeller and thence into the intake passageway where the pressure is lowest. This lossmaterially reduces the emciency of the pump.
Of course, there is necessarily some leakage fromthe discharge port to the intake port, by the buckets themselves as they pass through the separator, from the high pressure region to the but by itself is not troublesome. It is when there is added to this loss,.the loss all around the imheller through the clearance spaces at the sides thereof. that the aggregate' loss materially reducesthe efficiency. My invention ofthe pressure seals in actualcontact with the sides of the impeller, and with provision for preventing leakage at the outer periphery of the seals, `eliminates all of this additional loss. Y
I claim:A -11. In av pump, the combination of a rotary shaft,` an impeller thereon having an annular Y -row of vanes adjacent-its periphery. means cle- 'iining a passageway in which the vanes travel, ajmovable sealing ring surrounding the shaft,
means for. yieldingly pressing such sealing ring into contact with the side ofthe impeller,4 and an annularmember coacting with, the ring preventing leakage fromsaid passageway across the /periphery of said ring. a 2. In a pump, the combination of a rotary impeller having an annular row of vanes and having smooth faces on its opposite-sides between the vanes and the axis, means defining a passageway in which the vanes travel with intake and exit passages to and from said passageway, a pair of movable pressure heads engaging said smooth faces of the impeller, and means for'maintaining said heads in such engagement.
3. In a pump, the combination of a rotary impeller having parallel fiat faces on its opposite sides and carrying a row of laterally open buckets beyond said faces, means defining an annular passageway in which said buckets travel, intake lfand exi-t passages communicating lwith said annular passageway, a pair of sealing rings having :dat inner surfaces contacting with the sides of the impeller, and a pair of pressure devices acting on the respective rings to maintain said rings in contact under pressure against the opposite faces of the impeller.
4. In a pump, the combination of a rotary impeller having faces on its opposite sides and carrying a row of buckets beyond said faces, means defining an annular passageway in which ,said buckets travel, intake and exit passages communicating with said annular passageway, a pair of heads having smooth inner surfaces automatically pressed into contact with the sides of the impeller, and a pair of yielding annular members preventing leakage across the perimeter of the respective heads.
5. In a pump, the combination of a rotary drive shaft and an impeller thereon having a smooth side face and an annular row of buckets entirely beyond said face, stationary means deiinng an annular passageway in which the buckets travel, intake and exit passages communicating directly with said passageway, a sealing ring engaging said smooth face vof the impeller close to the inner periphery of the buckets, and a spring surrounding the shaft and compressed respective- 1y between said ring and a stationary abutment,
'whereby said ring is maintained in snug engagement with the side face of the impeller.
6. In a pump, the combination of a rotary drive shaft and an impeller thereon having lrow of buckets beyond said faces, a pair of stationary heads of annular form having mating grooves to provide a passageway 'about said buckets and intake and'exit passages to and from said passageway, and a pair of movable pressure heads mounted within the stationary heads and surrounding the shaft and contacting with the opposite faces of the impeller, and yielding means` for maintaining the movable heads pressed. against the impeller.
9. In a pump, the combination with a frame'Y a shaft carried thereby, an impeller on the shaft having fiat sides with an annular row of buckets beyond said at sides, a pair of stationary abutting heads in annular form on opposite sides of the impeller, said heads being recessed to dene a passageway extending about the impeller buckets and on each side thereof and beyond the periphery of the impeller, said heads having also outwardly extending notches to define intake and discharge passages, there being means separating said passages beyond the periphery of the impeller, a pair of annular pressure heads surrounding the shaft and mounted within openings in the stationary heads and engaging opposite sides of the impeller, and spring means acting on said pressure heads ic maintain the heads in snug engagement with the sides of the impeller.
10. In a pump, the combination of an impeller having an annular row of buckets adjacent its periphery and having smooth faces between the buckets and axis, stationary means defining a- Y passageway occupied by the buckets with intake smooth faces on its opposite sides and an annular row of buckets beyond said faces, stationary means dening an annular passageway in which the vanes travel, intake and exit passages communicating directly with said passageway, means for blocking the space between the intake and exit passages beyond the periphery and at the sides of the impeller buckets, and a pair of movably mounted heads engaging opposite faces of the impeller, and a pair ofsprings surrounding the shaft and compressed respectively between one of said heads and stationary abutments, whereby said heads are maintained Iin snug engagement with the sides of the impeller.
7. In a pump, the combination of a pair of frame members in face abutment providing an annular passageway with intake and exit ports, a rotary impeller mounted at the axis of said annular passageway and having an annular row 1 of buckets in said passageway and a smooth face between the buckets and axis, a pressure head slidably mounted within one of said frame members and having a smooth inner face engaging said smooth face of the impeller, and yielding means acting on the pressure head to maintain such engagement.
8. 'In a pump of the character described, the combination of a shaft, an impeller thereon having smooth opposite side faces and an annular and discharge passages to and from said passageway, said means having openings about the axis of the impeller, a pair of pressure heads mounted in said openings 0n opposite sides of the impeller, spring means for maintaining the pressure heads in contact with the smooth faces of the impeller, and annular yielding members closing the spaces between the perimeter of the pressure heads and the openings in the stationary means which they occupy.
11. In a pump, the combination of a frame, a pair of coacting stationary heads carried thereby having aligned cylindrical openings, said heads providing an annular passageway beyond said openings with intake and discharge passages leading to the exterior, a shaft coaxial with said cylindrical openings, an impeller on said shaft having an annular row of laterally open buckets in said annular passageway, said annular passageway being interrupted beyond the periphery of the impeller and at the sides of the buckets between the intake and discharge passages, a pair of pressure heads slidably mounted in the cylindrical openings of said stationary heads and abutting the opposite faces of the impeller, springs for maintaining the pressureheads in snug contact with the impeller, and an annular packing between lthe pressure rings and said stationary heads to prevent leakage from the annular passageway across the outer perimeter of the pressure heads.
12. In a pump, the combination of a rotary shaft, an impeller mounted thereon and having smooth opposite faces and an annular row of buckets beyond the faces, a pair of annular frame members on opposite sides of the impeller having mating annular grooves to provide a raceway for the impeller buckets. admission and discharge passages leading from said raceway to the region beyond the perimeter of said annular frame members, means carried by the latter separating the admission and discharge passages, a pair of anmaar pressure heads slidably momies einen said annular frame members and engaging the rounding the shaft and compressed between the,
outer faces of the movable rings and abutments carried by the frame. whereby the movable rings are maintained in snug contact with the impeller.
13. In a pump, the combination of a shaft, an impeller thereon having at oppositefaces and an annular row' of laterally open buckets Ibeyond said flat faces, a pair of abutting stationary heads having mating grooves to provide a passageway about said buckets and intake and exit passages to and from said passageway, a pair of frame members abutting the outer sides of said heads and holding them againsteach other,
- bearings carried by said' frame members in which said shaft is journalled, a pair of movable pressure heads of annular form surrounding the shaft and contacting with the opposite faces of the impeller close to the bases of the buckets, and a pair of compression springs surrounding the shaft and compressed between the outer faces of said 4movable heads and abutments carried by the two frame members respectively.
14. In a pump, the'combination of a vertical frame member having a supporting base and carrying a discharge chamber at the top and hav. ing intermediately a horizontal opening, a pair of mating frame heads mounted in said opening and abutting each other, the opposed faces of the heads being grooved to provide an annular passageway with intake and discharge passages to the exterior ofthe heads, said discharge passage communicating with the discharge chamber and there being means separating thedischarge passage from the intake passage, a pair of frame members of cup-shape facing inwardly and abutting the outer faces of said annular frame members, said cup-shaped frame members being bolted to said vertical frame member, the cupshaped frame members carrying bearings f or a drive shaft, a shaft mounted in said bearings, an impeller mounted on the shaft having an annular row of buckets, occupying the annular passageway of said annular frame heads,a pair of annular sealing rings freely surrounding said shaft and slidably mounted in said frame heads, a pair of compression springs surrounding the shaft and each compressed between the adjacent pressure ring and an inwardly extending web on the adjacent cup-shaped frame member.
15. In a pump, the combination `of a rotary shaft, an impeller mounted thereon and having smooth opposite faces and an annular row of 'buckets beyond the faces, a pair of sleeves embracing the shaft and abutting opposite sides of g l A buckets travel, a pressure seal continuously pressed against the side of the impeller, and
f means for adjusting the pressure of said seal.
1 7. In a pump, the combination of a pair of frame members having bores and -grooved inner faces and means for holding the members in face abutment to define an annular passageway. there being intake and exit passages communicating with the annular passageway. a shaft atthe axis of said bores, an impeller on said shaft having an annular row of buckets adapted to travel in said annular passageway, pressure seals surrounding the shaft and each including a compression spring and a head bearing against a side of the impeller, said frame members carrying extensions internally threaded about the axisl of the shaft and spaced therefrom, and externally threaded sleeves occupying such internally threaded openings and bearing against the outer ends of the pressure seals to force the same against the opposite sides of the impeller.
18. In a pump, the combination of means defining an annular passageway for liquid, an im peller having an annular row of buckets operating in said passageway, a shaft carrying the impeller, a pressure seal surrounding the shaft and comprising a spring-extended bellows terminating in an annular member having its outer periphery of no greater diameter than the inner periphery of the row of buckets and bearing against the impeller, a ring with a cylindrical flange, said flange surrounding the shaft and occupying the interior of the bellows and the ring extending across the outer end of the pressure seal, and adjustable means engaging said ring to apply a variable compression to the spring to adjust the pressure against the impeller.
19. In a pump, the combination of a rotary impeller having an annular row of buckets, a frame member having in one face an annular ,groove to form a wall for an annular passageway in which the buckets operate. said frame member having an opening, a sealing head slidably occupying saidcopening andA engaging lthe side of the impeller, a yielding member between the outer perimeter of the seal head and the wall of said opening to prevent liquid passage between them, and means for maintaining the head in contact with the impeller while the latter is running.
20. In a pump, the combination of a rotary shaft, an -impeller thereon having an annular row of buckets, a stationary frame member` surtlonary means providing a raceway V:Ifor the im v peller buckets, admission and discharge passageways leading fromv said raceway outwardly to the region beyond the periphery of said impeller. there being means separating the admission and discharge passageways,` a pair of annular pressure heads slidably mountedl within said stationary means and engaging the opposite faces of the maintained inl snug contact with the impeller,
Y impeller, and means for causing said -heads to be l16. In a pump,the combination 'of'.-rotary 11npeller carrying anV annular row of buckets. means -deflning a passageway' forliquid in which said rounding the shaft and having in one face an annular groove to form a wallfor an annular passageway in which the buckets operate, said frame member having a bore concentric of the shaft, a sealing ring slidably occupying said bore and engaging the side of the impeller, there being clearance between the outer periphery of the sealing ring and the bore of the frame member, and a. packing between the outer periphery of the seal head and the inner periphery of the frame member and 'engaging one of such peripheries whereby the seal head may tip slightly within the stationary member and maintain an accurate presentation'to the face of the impeller, and a spring bearing against the outer face of the seal head to maintain such engagement.
Y 21.*In a pump, the combination of stationary frame member defining an annular passageway for liquid, ka shaft. an impeller on the shaft having anannular vrow `of buckets occupying said eway, aseal head slidably occupying space about. the shaft within said frame'member, a
spring bellows surrounding the shaft and bearing against the seal head, a passageway through the stationary member for conveying lubricant to the space about the pressure seal back of the seal head and a passageway through the seal head for conducting such lubricant from such space to the face of the seal head engaging the impeller.
22. The combination of a rotary impeller having a row of vanes at its periphery providing an annular row of buckets distant from the axis of the impeller and means preventing leakage along the face of the impeller from buckets containing fluid of lower pressure comprising a sleevelike member contacting the impeller adjacent the bases of the buckets, and means to prevent leakage between said sleevelike member and a member with which it frictionally coacts to prevent leakage between them while allowing relative rotary movement.
23. In a pump, the combination of a rotary impeller having an annular row of buckets, means dening a passageway in which the buckets travel and means preventing leakage from a bucket containing uid under higher pressure to a bucket containing fluid of lower pressure via the face of the impeller, said means including a seal in contact with the face of the impeller adjacent the base of the buckets, there being a slipping engagement between the face of the seal and a member of the pump and yielding means comg prising a spring for maintaining such slipping engagement snug during rotation of the impeller.
24. In a pump, the combination of a shaft, a rotary impeller thereon having a row of vanes at its periphery providing an annular row of buckets distant from the axis of the impeller, a device for preventing leakage from a peripheral region of higher pressure along the face of the impeller to a peripheral region of lower pressure comprising a sleevelike member surrounding the shaft and contacting the impeller adjacent the bases of the buckets, a compression spring sur rounding the shaft, and an abutment surrounding the shaft and serving to compress the spring against said sleevelike member to maintain the latter member in slipping engagement with a member of the pump between which members there is relative rotary movement.
25. In a pump, the combination of a rotary shaft, an impeller thereon having an annular row of vanes adjacent its periphery providing buckets open at the side of the impeller, said impeller having a smooth side face between the buckets and axis, means dening a passageway in which the vanes travel, a movable sealing member having a smooth face engaging the side face of the impeller within the circle defining the bottom of the buckets, and a yielding pressure device maintaining such sealing member in contact with the impeller.
26. In a pump, the combination of a drive shaft, an impeller thereon having a smooth side face and carrying a row of buckets beyond said face open at their outer side, means defining an annular passageway in which said buckets travel, intake and exit passageways communicating with said annular passageway. a sealing ring contacting with the side face of the impeller within the circle defining the bases of the buckets close to the bases oi the buckets, and a compression spring surrounding the shaft and maintaining said sealing ring in slipping contact under pressure with a member between which there is relative rotary movement.
27. In a pump. the combination of a rotary impeller having vanes providing an annular row of laterally open buckets, means defining a passageway in which the impeller vanas travel. a seal member engaging the face of the impeller between its axis and its vanes and having its outer periphery'adjacent the inner periphery of the buckets, and means preventing leakage from said passageway across the perimeter of said seal member. l
28. In a pump, the combination of means dening an annular passageway with intake and exit ports, said means including a frame member with a bore, a rotary impeller mounted coaxially with said bore and having an annular row of buckets in said annular passageway and a smooth face between the buckets and axis, a round sealing ring slidably mounted in said bore and having a smooth face, means for maintaining said smooth faces in actual contact while the impeller ls rotating, and means preventing leakage across the periphery of the sealing ring.
29. In a pump, the combination of a frame member having an opening through it, one face of said member forming a wall for an annular raceway, a rotary impeller having an annular row of open-sided buckets traveling in said race- Way, a pressure seal continuously pressed against the face of the impeller adiacent the bases of the buckets, a cross member carried by said frame member and means mounted in the cross member for adjusting the pressure of the seal against the impeller.
30. In a pump, the combination of a frame member having an opening through it, one face of said member forming a wall for an annular raceway. the other face of the member having a projecting annular flange, a rotary shaft, an impeller thereon having an annular row of buckets traveling in said raceway, a pressure seal surrounding the shaft within said annular iange and engaging the face of the impeller, a spring bearing against the pressure seal, a. stationary cross member carried by the annular ange and surrounding the shaft, and means on the cross member for compressing the spring to maintain the seal continuously pressed against the impeller.
31. The combination of a shaft, an impeller thereon having an annular row of open-sided buckets adjacent its periphery, means defining an annular passageway for liquid in which said buckets travel, intake and discharge passages A communicating with said annular passageway, a seal ring surrounding the shaft and engaging the, face of the impeller adjacent the bases of the REFERENCES CITED The following'references are of record ln the file of this patent:
UNITED STATES PATENTS Number Name Date 1,580,032 Geiger Apr. 6,1926 1,884,974 Hurd Oct. 25, 1932 2,245,094 Neibert June 10,1941 2,247,335 Neibert June 24, 1941 1,768,313 Ferguson et al. Jlme 24. 1930 -1,972,548 Brady, Jr. Sept. 4, 1934 (Other references on following me) Number Name Date Leopold et al. r-.r Oct. 7, 1941 Frederick Aug. 18, 1936 Allen Novj. 19, 1935 Meckenstoek Sept. 3, 1935 Allen May`28, 1935 Moulet 1---- Dec. 12, 1933 Myltng Nov. 28, 1933 Fageol et al. Oct. 24, 1933 Number Number Name Date Wiltsev Dec. 11, 1928 Wilson July 12, 1927 Ensign May 26, 1925 FOREIGN PATENTS Country Date Great Britain Feb. 17, 1921
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Cited By (8)

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US2467960A (en) * 1944-07-13 1949-04-19 Jr Francis E Brady Sealing unit
US2578780A (en) * 1946-09-20 1951-12-18 Fairbanks Morse & Co Rotary pump seal
US2779611A (en) * 1952-03-04 1957-01-29 Wernert Karl Sealing arrangement for shafts
US3963371A (en) * 1975-07-24 1976-06-15 Roy E. Roth Company Multi-stage pump
US5924697A (en) * 1997-03-03 1999-07-20 Durametallic Corporation Double gas seal with bellows supported by backing and support rings
US5941531A (en) * 1997-03-03 1999-08-24 Durametallic Corporation Double gas seal having an improved bellows arrangement
US6182971B1 (en) 1998-12-09 2001-02-06 Flowserve Management Company Gas seal for pumps
US6224060B1 (en) 1998-12-09 2001-05-01 Flowserve Management Company Pump gas seal with particle exclusion device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467960A (en) * 1944-07-13 1949-04-19 Jr Francis E Brady Sealing unit
US2578780A (en) * 1946-09-20 1951-12-18 Fairbanks Morse & Co Rotary pump seal
US2779611A (en) * 1952-03-04 1957-01-29 Wernert Karl Sealing arrangement for shafts
US3963371A (en) * 1975-07-24 1976-06-15 Roy E. Roth Company Multi-stage pump
US5924697A (en) * 1997-03-03 1999-07-20 Durametallic Corporation Double gas seal with bellows supported by backing and support rings
US5941531A (en) * 1997-03-03 1999-08-24 Durametallic Corporation Double gas seal having an improved bellows arrangement
US6182971B1 (en) 1998-12-09 2001-02-06 Flowserve Management Company Gas seal for pumps
US6224060B1 (en) 1998-12-09 2001-05-01 Flowserve Management Company Pump gas seal with particle exclusion device

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