US994573A - Rotary pump. - Google Patents

Description

A. GOTOLL.

ROTARY PUMP.

APPLICATION TILED Age. 13, 1910.

Patnted June 6,1911.-

n. 4 b n a 6 H m i Z 7 A. OOTOLI.

ROTARY PUMP. uruoumu rI'Lnn AUG. 13, 1910.

Patented June 6, 1911.-

z ennui-511111112.

cation.

. UNITED-STA- To all whom it may concern:

Be it known subject of the Habana, Cuba,

and useful Improvements in Rotar Tits OFFICE.

n wromo coroLr, bi nsert, ctr-3A.,

smn r m? I p q i n Let s me fettehted J. ime 6, 1911. Application nie'a, August 13, 1919;"-

that I, ANTONIO OoroLi, King of Spain, residing at have invented certain new of which the following is a speci cation.

The present invention relates to improve ments in 'rotarydpumps adapted'for raising or forcing lu u-1'" s or other gases,

and 'for compressing air and the primary objects of the invention are to provide a novel pump of this type wherein the inlet and outlet-- ports of the piston chamber are so located that this chamber may always remain full of liquid orgo s when =the"operat-ion of the.

pump is interruptd 'thereby preventing backflow. of the this type with tially in the form-pf shutters which :areso mounted that they willfopenfor expand to while each-{shut er: 1s rotetannularpatlhan theses'h ut will'eollepse and remain .in-J

impel the fluid ing through its ter-like pistons active while ,following" the remainden of their annular course with the" result {that the ump will auses; fllliCF V entinvention,

due to inertia otthe only exposed to the fluid while they are, ex;

panded or opened are acting. on-theflu i'df to impel it, there being no loss ofzpower due to friction between h fluid while the pistonsare followingthe en active portions f To these and other ends, the'i H consists in certain improvements, and-come.

of pa'rts, all as binations and novel features larly in arrangements v will be hereinafter more fully described,';, t he pointed out partic'w" t the claimsat e end of the specifithe pistons; an

of their course.

being In the accompanyin drawingz'Figure 1 is a pers ective view 0 a pump constructed 1n accor ance with .my present invention;

Fig. 2 represents a section through the pump taken centrally to its axis, an

rangement of the parts; Fig. 3 represents thereof and at right angles d showing the interior arpiyotedshu tter-like pistons; Fig. Pumps,

,ti'v'elyg "and these parts are is provided with the ,chamber continuous flow of the with constant end. uniform" velocity.- thereby avoiding losses fluid and; moreover, according tothe-presthe, shutter-like pistons are} ports being preferably incline substantially to the direction of flow of the these which is a rig; No. 5763,94.-

anaxialv section through the pump on the line 3 j :31.of Fig,2';,F1 4 is a perspective view of th'e innergframe which carries the 5 is a perspective"vi'ew of the driving shaft of the pump;' Frig -b illustrates the franie shown in Fig. 4 n elevation; Fig. 7 represents an inner" view of, the 'rear 'eo'ver plate; Fig. 8 is--an"inner view {ogf the .front cover plate; and F ig.,9 shows in elevation the intermediate ring having the piston chamber and the iiilet' and discharge pipes connected thereto. Similar arts are designated by the same reference" characters in the several views.

The. pump in the-present instance is composed generally of a rear cover plate 1, an lntermediate ringfl, a front cover plate. 3,

end-an inner revoluble frame or piston carri'e'r,-4.'" 'The ringj2 is'int-erposed between the rear andifrontfcover plates .1 and 3 res cfirmly united by the screwsor bolts 5 arranged in the open- ,ings 6 formediin the cover plates 1 and The ring 2 which I to contain the pistonsxhas inlet-and discharge ports 7 and 8"formed therein at opposite oints, these d to conform and the interposed ring2.

fluidin entering and leaving the pump, and ports communicate with the suction and;-"d1scharge pipes 9 and 10 respectively. Thesejpipesmay be attached to the pump in -'suita;bl e manner, they being provided hepreseilt instance with flanges 11 and 12 I 2 here seatedupon the exterior of the ring and jere secured-in' position by the Screws and The pist portion 2- is concentric, with carrier 4.KTh'e lower portion 2" of the piss ton ,chainbe'ris also formed as an are of 'a, circle, but ithafs a to'the portion .2 by the straight or tangential portion 2' at one end and by a some- What abru t portion 2 at its opposite end jaoen to the discharge port 8.

on, chamber within the ring 2 has a substantlally semi-circular por- "tion 2,'g'toward the top. of the pump and this s micircular the axis 'offthe-revolubIe frame or piston,

greater radius. than the radius of the-portion 2': and it is connected The rear cover plate 1 may be provided with suitable; means for supporting the pump, it having in the present instance a pair of lateral lugs having apertures 16 to receive screws or bolts by means of which the pump may be secured to any upright support. The inner surface of this rear cover plate 1 is formed with a circular groove or channel 17 which is concentric to the axis of rotation of the frame or carrier 4. This plate 1 also has an inwardly extending projection 18 which is of approximately semi-cylindrical form, it having a concentric and substantially semi-circular peripheral portion 18 toward its upper side and which is opposed to and paralleL'with the semi-circular portion 2 of the piston chamber in the ring 2, and the under side of this extension 18 hasa reduced portion 18 which leads to the peripheral .18 by the sinuous surface 18, this portion 18 of the periphery of the extension being somewhat abrupt or prominent. The forward face of the extension 18 has 'a groove or channel 19 formed therein which is concentric with the axis of rotation of the frame or piston carrier 4 and the extension is'provided with abore' 20 which forms the axis for' the grooves 17 and 19 and the surfaces 2 and 18, this bore 20 being adapted to receive the drivin shaft 21 for the pump. This bore 20 is also ormed toward .its outer end with a counterbore 22 for a purpose to be' hereinafter described.

The inner rotary frame or piston carrier 4 is composed in the" present instance of a disk 23 and an opposed ring 2 1, the ring and disk being arranged. parallel and concen-" tricallyand are maintained in proper relation by a-suitable nn-m'berof circumf'erentially' spaced cross-bars'25. The pistons 26 are mounted in the frame or carrier between the cross-bars, each piston being pivoted at 1 an intermediate point to the disk23 and ring 24 respectively. Each piston26-is in sub stantially the form of'a shutter having an I arc-shaped contour in a longitudinal direction, a pivot 27 being-connected to each shutjter at a pointintermediate its length and cotiperates and forms a ,drivirz? connection being-journaled respectively in the disk 23 and the ring 24 whereby the piston-like "shutters are permitted to swing about these pivots as axes. The swinging .motion of each shutter, however, is limitedby an arc-' shaped projection 28 which is formed on the inner face of the disk '23, these pr0j.ec-'

tions 28 operating freely inthe concentric oove or channel 19 in the extension 18 uring rotation of the piston carrier; The

center of the disk 23 is formed with ahub 31 which -is revolubly mounted. and supported within the countertbore -22 a1'idit has an angular opening 29 formed therein which portion with the collar 30 on the driving shaft 21', this collar havinga corres onding angular periphery. Each shutter-1i e pistonis provided toward its outer edge with a roller 32 which when the shutter-like piston is in collapsed position is accommodated by the notch 33 in the periphery of-the disk- 23, but when the shutter-like piston is extended.

this roller 32 will operate in a groove or .18, they are opened or expanded as shown I substantially in Fig. 2. by reason ofthe en-- gagement of the. roller 32 toward the outer edge of each shutter-like piston with the groove 34 formed in'the cover plate 3, each "shutter-like piston fitting the piston-space in the lower portion of the pump, and as these 5 pistons revolve in the direction indicated by the'arrow .in Fig. 2, ,it is obvious that the fluid will be forced continuously through I the pump, being drawn in by the suction pipe 9 and ejected by the discharge ,pipe 1 0. The driving shaft 21 extends through a cen tral opening 35 formed in the front cover plate 3, and the exposed portion of the driv- 10 mg shaft'may be provided with a belt pulley 37 p or a hand crank 38 whereby it may be revolved. ;,The interior wall 36 of the groove 3 1 cooperates with the rollers 32 upon the outerends of the shutter-like. pistons and 10:- thereby retains the istons in opened position, each roller 32 ing thereby caused to follow positively the groove 34. i

The 0 eration of the pump may be briefly describes asfollows: Rotation of the pump 11" shaft or a'xle either by power applied by a: motor to the belt pulley 37 or by hand to the crank 38 will cause the frame or piston carrier to revolve within the pump casing and .in thedirection indicated by the arrow in Fig. 2 131s each shutter-like piston ap proaches the s-met port 7 the roller 32 at its; outer end Will -leave, its respective notch 33 in the rotatable cairien and following the surface 2", the 'outer endofthe piston will slide along the outer concentridsjurface 2", the-roller 32 at this time following the--- groove'or channel 34 in the front plate 3 and chamber and toward the I25 {the next shutter-like the shutteg 56 o ened will advance the fluid through t "e 'st nI piston openspthe twopistons. will for? be I tween them a chamber containingthe l I t and this chamber will advance dnrin the rotation of the piston carrier, towar the discharge port. As soon 'as each iston also move inwardly until the piston occupies a position in collapsed relation to the piston carrier, and further rotation of the piston carrier will return this piston toward the inlet port while the piston moves edgewise between the concentric surfaces 2 and 18. \Vhile the pistons are traversing the space between the surfaces 2 and 18, the roller 32" on each piston will operate in the upper portion of the groove 34, the pistons being t ereby held in collapsed position. In this manner the pistons are successively opened and collapsed during each revolution of the piston carrier and as each piston is moving into its collapsed position, the fluid is forced through the discharge port of the pump. While the shutters are returnin to the inlet port and between the concen ric surfaces 2 and 18; they neither offer any resistance to the fluid nor is the movement of the pistons im eded by the fluid and, moreover, the flow 0 the fluid into and through the pump is continuous.

I claim as my 1nvention:-

1. In a rotary pump, the combination of a casing having a. piston chamber formed with concentric portions of different diameters and provided with inlet and outlet ports which communicate with the piston chamber at opposite points intermediate the concentric portions thereof, a carrier revolubly mounted in the piston chamber, a set of pistons mounted on the carrier and movable to conform respectively to the concentric portions of the piston chamber, the casing having a groove the-rein embodying concentric portions of different diameters symmetrical with the concentric portions of the piston chamber, and means on the pistons and cooperative with said groove whereby the pistons are 0 ened and collapsed during the rotation o the carrier.

2. In a rotary pump, the combination of a casing having a piston chamber formed with concentric portions of different diameters and provided with inlet and outlet ports which communicate with the piston chamber at opposite oints which are intermediate the concentric portions of the piston chamher, a. carrier revolubly mounted within the pump casing, a set of pistons pivotally mounted on the carrier, the casing being formed with a groove which is symmetrlcal with the circumference of the piston chamber, devices on the pistons cooperative with said groove to open the pistons and cause the latter to cooperate with the concentric portion of the piston-chamber which is oflarger diameter and to collapse while traversing the concentric portion of the piston chamber of smaller diameter, and an extension form ing part of the. casing and. arranged within the revoluble carrier, said extension having a periphery which cooperates with the pistons throughout the revolution' of'the carrier and prevents retrograde flow of the fluid while the pistons are acting thereon. I

3. 'In a rotary pump, the combination of a casing having a piston chamber therein, one

wall of the piston chamber being formed u a piston. carrier.

with a circ ar groove, mounted within the casin and embodying a disk having a set of note es in its eri hery and an opposed ring, the ,disk avlng means for drlving it and the ring being revolubly journaled in the groove in the casing, and a set of pistons mounted on the carrier and operative in the piston chamber, each piston being provided toward its outer edge with a roller which is accommodated by a corresponding notch in the periphery piston is in an inactive of the disk while the position.

4. In a rotary pump, the combination of a" casing composed of opposed front and rear plates and an interposed ring, the latter orming a piston chamber, oneof said plates; having a segmental portion formed inte-' grally thereon and projecting inwardly into the piston chamber and substantially to the opposed plate, said portion having a bore and also a'count-erboreat one end, a driving shaft journaled in the bore of-saidinwardly projecting-portion, a carrier revoluble within the piston chamber and embodying a disk,

having a, relatively short hub which'is journaled in the counterbore of the opposed inwardly projecting portion, said hub also having an angular bore to cooperate and form a drivlng connection with a correspondingly shaped collar onvthe shaft, and

pistons mounted on the carrier and oper-- ative in the piston chamber.

5. In a'rotary pump, the combination of a casing composed of opposed front and rear plates and an'interposed ring, the latter orming a piston chamber having concentric portions of different diameters, the ring also,

having inlet and discharge ports arranged at opposite points which are intermediate the concentric portions of the piston chamher, one of the plates having a circular groove and the other plate having a roove which is symmetrical with the circurn erence of the piston chamber, acarrier revolubly mounted in the casing-and embodyinga disk and an opposed and rigidly connected ring which is revolubly jourualed in said circular groove, pistons mounted on the carrier' and operative in the piston chamber, In testimony whereof I hate hereunto set 1 and devices on the pistons cooperative with my hand in presenceof two subscribing Wltv I the other groove in the casing which is syl nnesses.

metrical with the circumference of the p1s-. v ANTONIO COTOLI. 5 ton chamber whereby the pistons are auto- Witnesses:

mat-ically caused to follow the contour of Tmnxm' MAS,

the piston chamber. I 1 RICARDO Momi,

Copies of this patent may be obtained tor flve cents each, by addressing the Commissioner otlatentl,

Washington, D. c." e

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