US1369527A

US1369527A - Pump

Info

Publication number: US1369527A
Application number: US376683A
Authority: US
Inventors: Isaac N Johnston
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-04-26
Filing date: 1920-04-26
Publication date: 1921-02-22
Anticipated expiration: 1938-02-22

Description

l. N. JOHNSTON.

PUMP.

APPLICATION FILED APR. 26, 1920,

1,369,527. Patented Feb. 22, 1921.

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I l Ilr 'I1/3 E IH 'l l, Il i' 5. 2; 121| 'd w 'p 24 Il zaza* n ll l; 3v l zx E fi Hu.. Ilab ,8 3l) INVENToR. w [mac IY. foiwop;

BY l y ATTORNEY.

VUNiTEu 'STATES ISAAC N. JOHNSTON, OF LOS ANGELES, CALIFORNIA.'

PUMP.

Specification of Letters Patent.

Patented Feb. 22, 1921.

Application filed April 26, 1920. Serial No. 376,683.

To all whom it may concern:

Be it known that I, ISAAC N. JOHNSTON, a citizen ofthe United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Pumps, of which the following is a specification. y

This invention relates to pumps or pump mechanism, and more particularly .to deep well pumps in which, water or other iuid is to be elevated by centrifugal action, preferably through the operation of a runner or runners operated in a pump bowl, and directing the water or Huid upwardly through a discharge pipe to a point of delivery. uch runner or runners is or are ordinarily operated through a main shaft or drive shaft or pump shaft extending to the surface of the ground, and may be inclosed in a casing through which lubricant is supplied 'for the purpose of lubricating the bearing or bearings of. the pump shaft and the shaft eXtensions or adjuncts which operate the runner or runners. The invention pertains to that type of centrifugal deep well pump in which the lubricant is provided in and disposed of through the agency of a circulatory system, which permits the used lubricant to`flow on invention has for its object the provision of improved pump mechanism Aof the general nature stated which will be superior in point of relative simplicity and inexpensiveness of the several features and elements pertaining to the accommodating andlubrication of the pump shaft and its extension or extensions or adjunct or adjuncts for or at or within the pump proper or pump bowl or bowls taken in conjunction with superiority in durability, reliability, convenience in repair and substitution of worn parts,compactness in form, and maintenance offree circulatory lubrication conditions, and which will be generally superior in efHciency and service- With the above and other objects in view,

the invention consists in the novel and useful provision, formation, constructiomcombination, association and relative arrangement of parts, members and features? all as hereinafter described, shown in the drawing, and finally pointed out in claims.

In the drawing:

Figure 1 vis a vertical central sectional yiew, partslbeing in elevation, of improvedl pump mechanism constructed and organized in accordance with the invention;

Fig. 2 is a detail transverse sectional view of the same, taken upon the line a02-m2, Fig. 1, and looking in the direction of the appended arrows; and

Fig. 3 is a similar view taken upon the line .aL-w3, Fig. 1y and looking in the direction of the appended arrows.

Corresponding parts in all the figures are designated by the same reference characters.

Referring with` particularity to the drawing, A designates the bowl of a pump runner B, such bowl being surmounted by a hollow casting C through which the liquid is discharged by the runner B, in the direction indicated by a large arrow in Fig. 1, such casting C communicating with the bowl A. Beneath the bowl A are hollow castings D, E and F all'communicating with each other and with the bowl A and through which the fluid of the well is elevated in the operation of the runner. These castings may be held Y together in any suitable manner and may be readily disassembled or separated to permit access to the working parts of the pump mechanism.

It will be understood that any number of runners B, as desired and practicable, may be employed, the same being mounted upon a concentric tubular runner shaft 4, and operatively coupled thereto to be rotated thereby, by a gib key 5. 6 designatesa drive shaft adjunct or extension provided at itsupper end with screw threads 7 whereby it may be coupled to the main or pump shaft (not shown), as an extension thereof. 8 designates the lower end of a concentric casing surrounding the upper portion of the shaft member 6, and spaced therefrom by an annular chamber 9 constituting part of the circulatory lubrication system and supplied with lubricant through further lengths of .such concentric casing 8 which are to be 'sleeve bearing 13 extending part way, from top to 'bottom of the tubing 10, and within this sleevel bearing the shaft 6 is rotatably accommodated. Threaded. into the lower end of the tubing 10, as at 14, is a further vertical sleeve bearing 15, which loosely surrounds the upper end of the hollow runner i sha-ft 4. The sleeve bearing 13 preferably and above this spa-ce is provided an annular space 17a surrounding the rotating shaft 6 beneath the sleeve bearing 13 therefor. Lubricant may pass through these spaces into the spacebetween the hollow runner shaft bearing 15 and the hollow runner shaft 4, afterA such lubricant leaks out beneath the sleeve bearing 13. -Vithin the casing E is provided a short tubing 18, supported concentrically therein by webs 19, and pressed into and fitted tightly therein is a sleeve bearing 20 within which rotates a short shaft 21 provided at its upper end with a threaded extension 22 threaded into the lower end of the hollow runner shaft 4, such shaft 21 having an annular shoulder or off-set 23 below the extension 22 and having a relatively tight bearing fit upon'the upper end of an annular piston 24 .which surrounds the upper end of the sleeve bearing 20 and is free to play endwise within a chamber 25 formed in the tubing 18 at its upper end, there being likewise accommodated in such chamber 25 a coil compression spring 26a 'exerting its energy of compression upwardly against such annular piston 24. A screw 26 set in the side of the tubing 18 extends at its inner end into a recess 27 formed in the annular piston 24 and prevents the same from turning, While permitting itsaxial movement. Chambered in this annular piston 24 is a piston ring 28 bearing against the outer wall of the chamber 25 above the screw '26. The tubing 18 is closed at its lower end by a screw plug 29. A lubricant duct 30 Iis produced radially into the shaft 6, to the axis thereof, and thence angular'ly downwardly in such axis to communicate with the interioi of the `hollow runner shaft 4. VThe upper end of this duct 30 opens out of the shaft within the sleeve bearing 13. A similar lubrication duct 31 is produced axially downward in the shaft 21 and then at right angles radially outward within the interior of the sleeve bearing 20. Both of these

ducts

30 and 31 open into the ,hollow runner shaft 4 through the threaded extensions 16 and 22 respectively." The sleeve bearing 2O preferably has a close working fit around the short Shaft 21.

spondingly, is or are operated by the pump shaft through the short shaft 6 and the runner shaft 4, by suitable power mechanism which will be understood as located preferably at the surface ofthe ground. The lubricant supplied to the inclosing casing 8 passes down between the shaft 6 and the sleeve bearing 13 and around the annular off-set or shoulder 17 into the space between the short sleeve bearing 15 and the hollow runner shaft 4. A certain portion of the lubricant passes out into the bowl A through the open space 32 above the runnerB and between it and the` pump bowl abutment or guide 33 for directing the course ofthe elevated fluid. The centrifugal action produced in the operation of the runnerv B draws this lubricant out from the space 32 'and into the stream or elevated fluid. A

portion of the lubricant passes down through the duct 30 and into the hollow runner shaft f 4 whence it passes through the duct 31'and may work its way up .through the space between the short sleeve bearing 20 and the shortshaft 21 and so out between the yieldingly mounted annular piston 24 and the annular off-set 23, and thus out into the chamber in the casting D, and be carried away by the ascending column of fluid being pumped. The compression of the spring 26a upon the annular piston 24 serves to produce a substantially sand-tight joint between such annularpiston 24 and the annular off-set 23, while at the same time permitting a slight leakage and waste of used lubricant between such olf-set 23 and such annular pistoni 24, thus maintaining a circulatory system to the very bottom of the operating parts of the pump mechanism and out into the ascending fluid. Thus all of the lubricant eventually finds its way out into the ascending fluid, either above the runner B through the annular space 32, or between the sleeve bearing 20 and the short shaft 21 and under the annular offset 23 and over the annular piston 24 and out around such annular enlargement 23 and between it and the tubing 18 into the chamber in the casting D. By this circulatory lubrication system all of the Working and""bearing surfaces of the shaft 6, the hollow runner shaft 4 and the shaft 21 are effectively served. The spent or depreciated drives suchrunner and includes the shaft 6,

- the hollow runner shaft 4 and the shaft 21.

If it be desired to replace or repair any of the parts of the pumpythe bowl A and the l castings C, D, E and F may readily be separated and the repair or replacement made vin the field and without sendin the pump to a repair shop or a factory. Vhen the parts are disassembled a fresh sleeve bearing 13 may be screwed into the casing 8, fresh shaftings 6 and 21' may be screwed into the hol low runner shaft 4, a fresh sleeve bearing 15 may be screwed into the tubing 10, or afresh sleeve bearing 20 may be pressed into the tubing 18, and a new spring 26a and new annular piston 24 may be substituted for the corresponding parts, all as may be required to maintain the pump in proper working condition. It will be understood, however, that the pump as organized is capable of long continued operation without repair orA replacement, being thoroughly and effectively lubricated by the circulatory system and in a circulatory manner, and by the means and features herein pointed out and described.

It is obvious that various changes and modifications may be made in practising the invention, without departing from the true spirit of the invention, although widely.

varying from the particular construction and organization and combination and interrelation and association of parts shown in the drawing and heretofore described and set forth.

Having thus disclosed my invention, I claim and desire to secure by Letters Patent:

1. In' mechanism of the character dis.- closed, a pump bowl, an impeller therein, and operating means'for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve\bearing for the rotating shaft, and a bearing' for the hollow runner shaft, there being a lubrication duct -provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner slfaft.

2. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft;

there being a chambered pump casting above the pump bowl and separable therefrom.

3. In mechanism of the character disclosed, al pump bowl, an impeller therein, and operating means for the impeller com- -prising a rotating shaft, a hollow Arunner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downwardinto the hollow runner shaft; there being a chambered pump casting above the pump bowl and separable therefrom;

there .also being a chambered pump casting below the pump bowl, and a bearing therein; the hollow runner shaft being provided with an extension rotatably mounted within said bearing in said lower pump casting.

4. In mechanism of the character disclosed, a pump bowl, an impeller therein,

and operating means forthe impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotatingA shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollowrunner shaft; there being a chambered pumpcasting above the pump bowl and separable therefrom; there also being a chambered pump casting below the pump bowl, and a bearing therein; the hollow runner shaft being provided with an extension rotatably mounted within said bearing in said lower pump casting; there being further provided a lubrication duct extending from ,said hollow runner shaft through said hollow runner shaft extensionand to the bearing surface 'of said hollow runner shaft extension within said bearing in the lower pump casting.

5. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller com- 'prising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a

sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow krunner shaft; there being a chambered pump casting above the pump bowl and separable therefrom; there alsobeing a chambered pump casting below the pump bowl, and a bearing therein; the hollow runner shaft being providedwith an extension rotatably mounted within said bearing in said lowerpump casting; there being further provided a lubrlcation duct extending from said hollow runner shaft through said hollow runner shaft extension and to thebearing surface .of said hollow runner shaft extension within said bearing inthe lower pump casting; said lower bearing being fitted with a sleeve bearing for the hollow runner shaft extension.

6. In mechanism of the character disclosed, a pump bowl, an impeller therein,

below the pump bowl, and a bearing therein; the hollow runner shaft' being provided with an extension rotatably mounted within said bearing in said lower pump casting; there being further provided a lubrication duct extending from said y hollow runner shaft through said hollow runner shaft extension and to the bearing surfaceofv said hollow runner shaft extension within said bearing in the lower pump casting; said lower bearing being fitted-with a sleeve bearing for the hollow runner shaft extension; and there being further provided a yieldingly mounted annular piston surrounding said lower sleeve bearing. Y

7. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the .impeller comprising a rotating shaft, a hollow runner.` 'shaft upon which the impeller is fixed, a

sleeve bearing for the rotating shaft, and a bearing` for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from thesurface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; saidv rotating shaft being provided with an annular shoulder resting upon said hollow runner shaft, an annular lubricating passage being provided around said annular shoulder and communicating with the space between said hollow runner shaft and the bearing thereof.

8. In mechanism of the character d isclosed, a pump bowl, an impeller thereln, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; said rotating shaft being provided with an annular shoulder resting upon said hollow runner shaft, an annular lubricating passage tween 'said hollow runner shaft and the bearing thereof; said rotating shaft having an extension threaded within said hollow runner shaft.

-9. In mechanism of.' the character dis- A closed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and| a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; said rotating shaft being provided with an annular shoulder resting .upon said hollow runner shaft, an annular 'lubricating passage being pro-vided around said annular shoulder and communicating with the space between said hollow runner shaft and the bearing thereof; said'rotating shaft having an extension threaded within said hollow runner shaft, and said annular shoulder bev ing formed upon said rotating shaft directly above said threaded extension thereof.

10. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotatingl shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for` the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; there being a close working fit between said sleeve bearing and said rotating shaft and a loose fit between said hollow'runner shaft and the bearing thereof.

11. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner closed, a pump bowl, an impeller therein,

and operating means for the impeller comprising a lrotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the r0- tating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; said hollow runner shaft being provided with an extension at the lower end thereof, and a bearing being provided for said extension, there being a lubricating duct formed in said extension and extending from said hollow runner shaft' to the surface of said extension within the bearing for said extension.

13. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided inthe rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner' shaft; said hollow runner shaft being provided with an extension at the lower end thereof, and a bearing being provided for said eX- tension; there being a lubricating",A duct formed in said extension and extending from said hollow runner sh-aft to the surface of said extension within the bearing for said extension; said lower extension of said hollow runner shaft being threaded into said hollow runner shaft.

14. In mechanism of the character dis- 3 shaft upon which the impeller is xed, a-

sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearlng downward into the hollow runner shaft; said hollow runner shaft being provided wlth an extension at the lower end thereof,

and a bearing being provided for said extension, there being a lubricating duct formed in said extension and extending from said hollow runner shaft to the surface of said extension within the bearing for said extension; there being an annular shoulder provided at the lower end of said hollow runner shaft, and said lower vbearing being surrounded by an annular piston upon the upper end of which said annular shoulder bears.

15. In mechanism of the character disclosed, a pumpbowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being'surrounded by an annular piston upon the upper end of which said annular shoulder bears; means being provided yieldingly holding said annular piston against said annular shoulder at the lower end 0f said hollow runner shaft.

16. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from lthe surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft said hollow runner shaft being provided with an exteansion at the lower end thereof, and a bearing being provided for said extension; there bein a lubricating duct formed in said extension and extending from said hollow runner shaft to the surface of said extension within the bearing for said extension; there being an annular shoulder provided at the lower end of said hollow runner shaft and said lower bearing being'surrounded by an annular iston upon the upper end of which sai annular shoulder bears; said annular piston being provided with means preventing its rotation but'r permitting its endwise movement.

17. In ,mechanism of the character disclosed, af' hollow runner shaft, a tubular bearing support, a sleeve bearing within said bearing support, an extension of said hollow runner shaft at the lower end thereof and having a working lit within said sleeve bearing, and a lubricating duct communicat-` ing with said hollow runner shaft and extending through said extension to the surface thereof in engagement with said sleeve bearing.

18. In mechanism of the character disclosed, a hollow runner shaft, a tubular bearing support, a sleeve bearing within said bearing support, anv extension of said hollow runner shaft at the lower end thereof and having a working fit within said sleeve bearing, and a lubricating duct communicating with said hollow runner shaft and exbearing, and a lubricating duct communicating with said'hollow runner shaft and extending through said extension to the surface thereof in engagement with said sleeve bearing; said extension being threaded into said hollow runner shaft; there being an annular piston fitted within said tubular bearing support surrounding said sleeve bearing and capable of movement endwise 20. In mechanism of the character disclosed, a hollow runner shaft, a tubular bearing support, a sleeve bearing within said bearing support, an extension of said' hollow runner shaft at the lower end thereof and having a working fit within said `sleeve bearing, and a lubricating duct communicating with said yhollow runner shaft and extending through said extension to the surface thereof in engagement with said sleeve bearing; said extension being threaded into said hollow runner shaft; there being an annular piston fitted within said tubular bearing support surrounding said sleeve bearing and capable of movement endwise thereof; means being provided exerting yielding -pressure upon said annular piston at one end thereof.

21. In mechanism of the character disclosed, a hollow runner shaft, a tubular bearing support, a sleeve bearing within said bearing support, an extension of said hollow runner shaft at the lower end thereof and having a working fit within said sleeve bearing, and a lubricating duct communicating with said hollow runner shaft and extending through said extension to ,the surface thereof-,in engagement with said sleeve bearing; said extension being threaded into said hollow runner shaft; there bein an annular piston fitted within said tu u'lar bearing support surrounding said sleeve bearing and capable of movement endwise thereof; means being provided exerting yielding pressure upon said annular piston at one end thereof; there being an annular shoulder provided at the lower end of said hollow runner shaft and bearing upon said annular piston.

22. In mechanism of the character disclosed, a hollow runner shaft, a tubular bearing support, a sleeve bearing within said bearing support, an extension of said hollow runner shaft at the lower end thereof and having a working fit within said sleeve bearing, and a lubricating duct communicating with said hollow runner shaft and extending 4' through said extension to the surface thereof vin engagement with said sleeve bearing; said extension being threaded into said hollow runner shaft; there being an annular piston fitted within said tubular bearing support surrounding saidF sleeve bearing and capable of movement endwise thereof; means vbeing provided exerting yielding pressure upon said annular piston at one end thereof; there being an annular shoulder provided at the lower end of said hollow runner shaft and bearing upon said annular piston; means being provided preventing rotation of said annular piston but permitting endwise movement thereof.

23. In mechanism of the character disclosed, a hollow runner shaft, a tubular bearing support, a sleeve bearing within said bearing support, an extension of saidhollow runner shaft at the lower end thereof and having a working fit within said sleeve bearing, and a lubricating duct communicating with said hollow runner shaft and extending through said extension to the surface thereof in engagement with said sleeve bearing; said extension being threaded into said hollow runner shaft; there being anl annular piston fitted within said tubular bearing support surrounding said sleeve bearing and capable of movement. endwise thereof; means being provided exerting yielding pressure upon said annular piston at one end thereof; there being an annular shoulder provided at the lowerv end of said hollow runner shaft and bearing upon said annular piston; said annular piston being provided with a piston ring fitting within said tubular bearing support.

24. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising'a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending fromlthe surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; there being provided a casing surrounding bearing for the hollow `-runner shaft, there in part the rotating shaft; said sleeve bearing for said rotatingshaft being threaded within said casing. y

26. In mechanism of the character disclosed, a pump bowl, an impeller therein, and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and extending from the surface thereof surrounded by the sleeve bearing downward into the hollow runner shaft; there being a tubular bearing support for said sleeve bearing and said bearing for said hollow runner shaft being threaded to said tubular support.

27. In mechanism of the character disclosed, a pump barrel, an impeller therein, i

and operating means for the impeller comprising a rotating shaft, a hollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being a lubrication duct provided in the rotating shaft and, extendin from the sur-l face` thereof surrounded by` the sleeve bearing downward into the hollow runner shaft;

.there being a looseworking it between said hollow runner shaft and the bearing for said hollow runner shaft and a passage for lubricant being provided from the lower end of said sleeve bearing for said rotating shaft to the space between said bearing for said hollow runner shaft and said hollow runner shaft.

2 8. In mechanism of the character disclosed, a pump bowl, an impeller therein,

cant being provided from the lower end of said sleeve bearing for said rotating shaft to the space between said bearing for said hollow runner shaft and said hollow runner shaft; said space between said hollow runner shaft and said hollow runner shaft bearing communicating with the pump bowl.

29. In mechanism of the character disclosed,l a pump bowl, .an impeller therein, and operating means for the impeller comprising a rotating shaft, ahollow runner shaft upon which the impeller is fixed, a sleeve bearing for the rotating shaft, and a bearing for the hollow runner shaft, there being alubricaton duct provided in the" rotating shaft and extending from the surface therein surrounded by the sleeve bearing downward into the hollow runner shaft; there being a chambered pump casting above the pump bowl and separable therefrom; there also being a chambered pump casting below the pump bowl, and a bearing therein; the hollow runner shaft being provided with an extension rotatably mounted within said bearing in said lower pump casting; said lower pump casting being separable from said pump bowl.

30. Mechanism of the character disclosed, comprising a pump bowl, a hollow shaft therein, an impeller upon the hollow shaft, a further upper shaft connected with the hollow shaft and a further lower shaft connected with the hollow shaft.

31. Mechanism of the 'character disclosed, comprising a pump bowl, a hollow shaft therein, an impeller upon the hollow shaft, and further upper and lower shafts connected with the hollow shaft; there being bearings provided for said upper and lower shafts and for said hollow shaft, and ducts being provided in said upper and lower shaftswhereby a circulatory lubrication system is provided to serve all of said bearings.

32. Mechanism of the character disclosed, comprising a pump' bowl, a hollow shaft therein, an impeller upon the hollow shaft, and further upper and lower shafts convnected with the hollow shaft; there being bearings provided for said upper and lower shafts and for said hollow shaft, and ductsv being provided in said upper and lower shafts whereby a circulatory lubrication system is provided to serve all of said ubearings; said upper and lower shafts being detachably connected with said hollow shaft.`

33. Mechanism of the character disclosed, comprising a pump bowl,r a hollow shaft therein, an impeller on the hollow shaft,

and further upper and lower shafts con-v 'nected with the hollow. shaft; there being bearings provided for said'upper and lower shafts, and ducts being provided in said 'upper and lower shafts whereby a circulaa further lower shaft connected with the hollow shaft.

36. Mechanism Vof the character disclosed, comprising va pump bowl, a hollow Vshaft 5 therein, an impeller on the hollow shaft, and a further lower shaft connected with .the hollow shaft; there being -a hearing provided for said further lower shaft, and a. duct being provided in said lower shaft 10 whereby a circulatory system is providedv through said hollow shaft and said further lower shaft.

In testimony whereof, I have signed my name to this specication in the presence of two subscribing witnesses.

ISAAC N. JOHNSTON-- Witnesses:

RAYMOND IvEs BLAKESLEE, L. A. WAGNER.