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Publication numberUS815522 A
Publication typeGrant
Publication dateMar 20, 1906
Filing dateSep 7, 1904
Priority dateSep 7, 1904
Publication numberUS 815522 A, US 815522A, US-A-815522, US815522 A, US815522A
InventorsEthelbert M Fraser
Original AssigneeFraser Hydraulic Compensator Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rotary pump and motor.
US 815522 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

BATENTED MAR. 20,1906;


APPLICATION TILED SEPT 7 1904 2 sums-sum" 2.


' y nt manner and by means underthe controlofthe attendant.

' some of said im and desira To all whom it mag concern:

- the novel features, nations of parts hereinafter described, and

' nections.

employment of any special outline of impel 5 'lers, but com r.'.ses,' withthe novel features 9 {hereinafter re tion'bein'g that there shall be two cooperating; impellers capable of rotating in }proper relation to each other intermediate t U T D" T ES P TEN ETHELBEIRTIM. FRASER, or



' Be it known that I, ETHELBERT M. FRASER, a citizen "of Canada, and a resident of'Yonkers, in the county of'Westchester and State of New York, have-invented certain new and usefulIm rovements in Rotary Pumps'and which the following is a specification.

The inventionrelates to im rovements in rotary motors and pumps an it consists in arrangement, and combiparticularly pointed out in the claims.

The object of the invention is to provide a nov 1 construction of rotary pump or motor the capacity of whichmay be readily varied from nothing to the maximum at will, the special feature'of advantage accomplished by my-mvention being that it does permit in .ro-' tary pumps and motors thevariation'of the eapacity of the same ina positiveand conveny lnvention pertains more particularly to the classes of pumps and motors employing two rotary implellers secured within a. casing upon parallel s afts geared together, said casmg having supplyand -dischar sports or conl The impellers in t ese classes of pumps and motors, while performing dutles, vary in their form and. construction, ellers being, for illustration, of cycloidal out ine and others in the form of gear-wheels of comparatively large pitch rotating in close contact within the casing.

' The present invention is not limited to the erred to, im'

ellers-of any suit able ordesirable outline, t

e main considerae] supply; and discharge.- In presenting m invention'heref in I illustrateim ellers oft e 'cycloidal-outline .or type, this" eing the form that-I prefer, without in an "manner meani to limit my. 2% any s 'ecial used inthis specification in a generic sense. In rotarfi' pumps it-is sometimes necessaryle to change the capacity or vo ume of the ROTARY PUMP ANDJVIOTOR- Specification of Letters Patent. r, Appl cation and s ambu7,'1eo4. 8eri'alNo.2 23,699. i.

e ntire ly while the upon and from sai pump and alsofto cease pumping pump is running at full speed, and these resultsare conveniently permitted by my invention. Rotary motors as heretofore constructed re tity of water at the norma pressure whether running free or fully loaded and are not efii- Qcient unless operated under full loadtand in accordance with my invention the fiuld consumed by the motor is proportioned to .the work done. a

. I designate my invention asv-an improvement in rotary pumps and motors; because the apparatus presented as embodying sa d invention'is' adapted for useeither as a pump or motor at will.- 1

In carrying out my invention and impellers thereon astationary to such extent as may be desired and a movable frame containing a rotary cylindrical envelop for the other impeller'a'nd to slide upon and'from-the'sametolsuch extent as maybe uire a fixed quan' V NEWYoRmAssieNoR TOFRASERI aHYDRAULIC COMPENSATOR COMPANY, or SAN FRANCISCO, CALIFOR- Patented March 20,1906;

'I provide [within the exterior casing having the parallel shaftsframe containing a rotary cylindrical envelop 3 Y for one of theimpellers to slide nto and from is I desired, said movable frame being provlded with means for causing it to travel directly toward and from the said stationar frame and the shaft of the impeller engage by the cylindrical envelop of the h v being) connected with the movable frame and ca a While the shaft o the other impeller'hasno slidin' movement, but permits the said movable ame to cam? its cylindrical envelop as may be requisite. l able frame is moved toward-the said stationstationary frame le of slidin through 'it's gear-wheel, I

impeller to such extent When the said-movary frame," its cylindrical envelop. will slide upon and cover a' of its impeller, an the same proportion the impeller of the sta-' tionaryframe'will be pushed into and'covvered 'by its cylindrical envelop, purpose that only) i 7 shall be exposed eyond their respective en-' velops as may be necessaY water to be umped'ort e work tobe'per: formed.

on the movable frame is moved ortion (or' all, if desired) (Fat'the same time and m' '95: it being myv so much of said impellers r he volume of I inwardly to-itsfullextent,'its envelopwill en-' tirelycover itsiinpeller, and it will push the .into the envelop for, the.

other impeller full latter, and then -w lo the parts of the a aratu's may. run at'full speed the impe ers pellers are brought into cooperative relation to each other and only so much of their extent is exposed as may be required in the performance of the duty demanded of them- I that is to say, only so much of said impellers is exposed as may be requisite for pumping or consuming, as the case may be, the required volume of water.

The .invention will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in wh1ch 'Figure 1 is a plan veiw of a pump or motor embodying my invention. Fig. 2 is a side view of same. Fig. 3 is a horizontal section of same on the dotted line 3 3 of Fig. 2. Fig. 4 is a vertical transverse section of same on the dotted line 4 4 of Fig. 3. Fig. 5 is alike section of same on the dotted line 5 5 of Fig. 3. Fig. 6 is a like section of same on the dotted line 6 6 of Fig. 3. Fig. 7 is a detached side elevation of the aforesaid stationary frame. Fig. 8 is an end view of same, taken from the right-hand end of Fig. 7. Fig. 9 is a detached side elevation of the aforesaid movable frame. Fig. 10 is an end view of same, taken from the right-hand end of Fig. 9. Fig. 11 is a detached end view of one of the rotary cylindrical envelops for the impellers, and Fig. 12 is a top view of same.

In the drawings, designates the exteriorcasin ,comprisin ,preferably,anapprox imately e liptical bo y 21 and heads 22, said body 21 having ports or o enin s 23 24 at opposite sides for the supp y an discharge of the liquid, said openings being surrounded by flan es 25, Figs. 1 and 2, for the convenient app ication to said body of the usual pipe connectlons.

Within the casing 20 are ap lied the stationary frame 26,,Figs. 3, 7, an 8, and movable frame 27, as shownin Figs. 3, 9, and 10. The stationary frame 26, looking at Fig. 3, is applied within the left-hand end of the casin 20 and comprises a semicircular longitudina portion 28 and a stationary elliptical transverse portion 29, (shown in detail in Figs. 7

and 8,) the said portion 28*extending the full distance between the heads 22, asshown in Fig. 3, and the transverse ortion 29 abutting against the left-hand hea .22 and containing a longitudinal circular opening or aperture 30, whichat one edge extends outwardly beyond the inner wal of the semicircular portion 28, whereby the shoulder 31 is formed at the inner edge of about one-half of the circumference of said aperture, as indicated drical envelop 32.

more clearly in Fig. 6. Within the opening or aperture is placed the rotary envelop 32, which is in the form of a cylinder freely filling the said opening or aperture 30 and at its inner edge abutting against the said shoulder 31, which prevents said envelop from being moved outwardly toward the ri ht, lookin at Fig. 3, from said aperture.- The rotary cy indrical envelop 32 contains the longitudinal opening 33, Figs. 3, 4, and 8, wihch snugly receives the movable impeller 34, the latter conforming in outline to said opening 33 and being capable of having a longitudinal sliding movement therein. The openin 33 in the envelop 32 \Vlll preferably be of en ficient length to fully inclose the said impeller 34, so that when desired the entire impeller 34 may be concealed within the rotary c lin- The envelop 32 is a apted to rotate within the aperture or opening 30 in the stationary frame 26, but has no sliding movement therein, and the said envelop 32 has its rotar motion imparted to it by the impeller 34. The impeller 34 is secured upon a shaft 35, whose left-hand portion extends through the left-hand head 22, Fig. 3, and has feathered upon it between said head 22 and a supporting-arm 36 a gear-wheel 37, which is in constant mesh with the corres onding gear-wheel 38, secured u on the sliaft 39, said shafts 39 beingpara lel with each other, as shown.

The right-hand end of the shaft 35 is connected w-th the movable frame 27 and while capable of rotation within an aperture 40 in said frame is compelled to follow said frame 27 in the movement of the latter, as hereinafter explained, while the shaft 39 is capable of rotation, but at no time has any longitudinal movement imparted to it.

The frame 27 comprises a longitudinal semicircular portion 41 and a transverse sub stantially elliptical portion 42, the outer end of the latter having a caplate 43 applied thereto. The inner longitu inal edges of the semicircular portion 41 are adapted to the shoulders 44, formed on the stationary frame 26, and slide against and guide upon said shoulders, that portion of the said stationary frame 26 located between the shoulders 44 and designated by the numeral 45, Fig. 8, fitting within the said semicircular portion 41 of the movable frame 27. The inner lonithin the transverse portion 42 of the movable frame is provided an opening or apportion 41, whereby the shoulder 49 is formed I dinalopening 5 1, which is securedforms in outline "shown inFig. 3

- hand head 22 caused aforesaid op'enin 1 ii sure of the inner en at Fig. 3, is

"along about one-half of the circu'mference'of said opening or aperture 48, as indicated by the dotted linesin Fig. 1 0. Within the '0 ening 48 is placed prior to the application 0 the cap-plate 43 the rotary cylindrical envelop 50, corresponding withthe envelop 32 inthe envelo is con ned at one end by the plate l at the other end bythe shoulder 49, andthesaid envelop 50 contains, a longitu- Fig. 11, for theimpeller 52, upon the shaft 39, and conto the interior outlines of the said opening 51. Theim eller-52jcor1fesponds also in outline with the impeller 34 and-cooperates therewith, as illustratediin Figs. 3 and 5.' .The impeller 54. may rotate with the shaft 39, but'is otherwise stationary,

.' th'e'movement of the frame 27 having noeffect upon it except to expose more orless of its inner end corres ondingly with the ex 0'- of the impeller 34,; l he shaft 39 extends through a'bearing-a 'erture in the plate43 and is seated withina earing 53, formed in the. right hand head 22, as

The shaft 35 at its "rightdiand end, lookin lprovided with 'a head 54., whic 1 is seated'wit 1 in a recess in the by reason of which the saidsha pelled to follow any outwardjmovernen t towhereof said impeller and shaft 35 will be compelled to move correspondin ly with, the

said frame 27 duringany' inwar movement of the latter toward the left.

ame 27 has secured to its outerend a The-fr I screw 55, which extends through the rightand has applied u wheel 56, the latter being swiveled to the comprise the means formoving the' frame'27 longitudinall andit is obvious that by the rotation of t e wheel 56 in one direction the screw andframe 27 willbe caused to appr'oach the stationary when the said wheel is turned in the opposite direction the said screw and frame 27 willbe to recede outwardly from the said stationaryframe 26. I do not, of course, limit the invention to any special means for moving the frame .27 toward and from the frame 26, since it is obvious that various mechanimpeller 52- and -When the 30 of theframe' 26. The

the frame 5 cealed within its rotary in its rotar motion,-with the impellers anr tion 42 of the movab -o enings'j23 24.

' late 43 and t 35 is com p v draws the im ward the right-bf the iristablefiafiieznana atits left ha'nd e ge the transverse portion tion used as a pump, ityor Volume of pon it a hand-f be capable of rotation upon the screw 55 without losing its relation to the said head. Thescrew 55 and wheel 56v frame 26 and that more'orless expose more or-less, theiinner .endof the cause the ex osure of more or essof thetinnerendof t e impeller 34. movable frame 27 is in the position" in which it is shown in Fig. 3,. about one-half of the impellers 34 52 are ex ative actionyand when the rame 27 is. in its osed for cooperextreme outer position toward the right the maximum surfaces of the im be exposed, while when the extreme inward position in 26 the impeller 'ellers 34 52 will rame 27 is at-its close relation. to 34 will be concylindrical envelop 32 and the impeller 52 will be' cylindrical envelop 50, and at such timet e shafts 35 39 ma continue in their rotary cylindrical envelops; but no, work .will be performed, because the impellers will then be concealed, and thee posite sides of the por e frame 27 will close the openings 23 24 against the passage of theiliquid; through the casing 20, said portion 42- then acting asavalve: to entirely close said I openings 23:24. In other positions of'the frame 27 during its movement 't'oward and from the frame 26 the said frame 27.acts as a valve to: more orless open or close the said t e frame 27 from the frame 26 it withdraws velop 32, and at the same ti'methe said frame 27 withdraws its envelop 50 off from the impeller'52'in the same proportionthat itwitheller'34 from the envelop 32, jthuscorrespondingly exposing the inner end portions of the impellers and placing the exposed portion ofthe impeller 34 intocooper'a- 52. When thelapparatus described is to-be it isobvious that tle capacthe pump may berchangedat Will by simply. varying the position of the movable frame 27- in relation to the station- 'ary' frame 26 and, also that the operation. of pumping ma be -stopped entirely by the movement-o the frame 27 close up tothe frame 26'without checking the movement of the gear-wheels 37 3.8 and shafts 35 39.

When the apparatus describedis to be. used portioned to the work to be done by simply adjusting the position of the movable frame 27 with relation to theframe 26, whereb of the impellers 34 -52 are ex-, osed and brought into cooperative action orduty. v I

I have illustrated the rotary envelo s 32;- 50 as sufficiently thickto completely ouse' within themthe impellers 34 52; but I desire my invention'is not limitit understood that ed to envelops of this particular thickness,

concealed with- During the movement 'of the impeller 34 toward the right from the enp I (I O wlth the exposed portion of the impeller IIO' asa motor, the liquid consumed may be prothat define the since it is the facing walls of said envelops or motor, and it is obviously immaterial Whether there is solid metal or simply space outwardly beyond these walls so long as the openings in the walls permit the impellers to be more or less concealed by passing into or from them.

What I claim as mv invention, and desire to secure by Letters atent, ist 1 In an apparatus of the character described, the im ellers, and the parallel shafts for said impelers, combined with a rotary envelop having an opening to receive more or less of one of said impellers, a rotary envelop havin an opening to receive more or less of the other one of said impellers, and means for effecting the exposure to a greater or less extent of the inner ends of said impellers and of placing said ends of said impellers into coperative relation to each other; substan tial y as set forth.

- 2. In an apparatus of the character described, the impellers, and the parallel shafts for said impellers, combined with: a frame having an opening therein, a rotary envelop fitting said opening in said frame and containing an opening to receive more or less of one of said impellers, a movable frame conforced into or withdrawn taining anopening, a rotary envelop fitting the opening 1n said movable frame and having an opening'in it to receive more or less of the other one of said. impellers, means connecting said movable frame to the shaft of the impeller of the first-mentioned frame, and means for moving said movableframe toward and from the other. frame, whereby be more or less om its rotary envelop and the envelop carried by said movable-frame is caused to more or less conceal or expose its impeller and the adjacent-ends of said impellers are brought into co6'era tive relation to eachother; substantia y as set forth. I I

3. In an apparatus of the character described, the impellers, and the parallel shafts for said im ellers, combined with a stationary frame aving an opening therein, a rotary envelop fitting said opening in said frame and containin an openin to receive one of said impellers ma more or less of one 0 said impel ers, a mov-y able frame containing an opening, a rotary passage through the pumppose its impeller Signed at New York cit envelop fitting the opening in said movable frame and having an o enin in it to receive more or less of the ot er 0 said impellers, means connectin said movable'frame to the shaft of the impeller of the stationa frame, and means for moving said movab e frame toward and from said stationary frame, whereb one of said impellers may be more or less orced'intoor withdrawn from its rotary envelop and the envelop carried by said movable frame is caused to more or less conceal or expose its impeller and the adjacent ends of said impellers are brought into ooo erative relation to each other; substantially as set forth.

4. In an apparatus of the character described, the impellers, and the parallel shafts for said impellers, combined with a frame 26 havin the longitudinal semicircular portion 28 am transverse portion 29 contain1ng the o ening 30 and having guide-shoulders 44, t e rotary envelop within said opening 30 and containing an opening to recelve one of said impellers, the frame 27 having the longitudinal semicircular portion 41 and transverse portion 42 containin the opening 48 and having the guide-shou ders 46, the rotary envelop within said opening 48 and having an opening 51 to receive the other one of said impellers, means connecting said frame 27 with the shaft of the impeller of the frame 26, and means for moving said frame 27 toward and from said frame 26, whereby one of or withdrawn from the envelop of the frame 26 and the envelop carried by said frame 27 may be causedto more or less conceal or exand the adjacent ends ofsaid impellers brou ht into cooperative relation to each other, 't e edges of the longitudinal portion 41 of the frame 27 guiding on the shoulders .44 of the frame 26 and the shoulders 46 of the frame 27 being adapted to guide on the edges of the longitudinal portion 28 of the frame 2.6; substantially as set forth. -7 in the county of New York andState of ew York, this 6th day of September, A. D. 1904. p



said impellers may be more or less forced into v

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2463950 *Jul 20, 1944Mar 8, 1949Dorsey Spencer HGear type rotary pump and motor hydraulic transmission
US2484789 *Apr 15, 1944Oct 11, 1949Hill LabVariable displacement pump and motor
US2645901 *Jul 27, 1948Jul 21, 1953Elkins Douglas ARotary pump and motor hydraulic transmission
US2697402 *Sep 15, 1950Dec 21, 1954Lindquist Arthur EImpeller construction for rotary pressure pumps
US2840991 *Jun 24, 1954Jul 1, 1958Nisbet John LRotary pump and motor hydraulic transmission
US2887960 *Nov 23, 1955May 26, 1959Tobias JordanAutomatic hydraulic transmission
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Cooperative ClassificationF04C14/185