Dec. 17, 1946. _ 2,412,877 E. M. EVANS ’ FLUID ‘MOTOR Filed ‘April 12, 1945 4 Sheets-Sheet l ‘ IN VEN TOR. ZZMZk'ams' ‘ Dec. 17, 1946. ‘E. M. EVANS ‘ 2,412,877 FLUID MOTOR Filed April 12, 1945\ 4 Sheéts-Sheet 2 ZMEvana I N VEN TOR. Dec. 17, 1946' 2,412,877 E. M. EVANS FLUID MOTOR Filed. April 12, 1945 4 Sheets-Sheet 3 lZMZ'vana INVENTOR - 4770/?4/5 n:- . Dec. 17, 1945. E. M. EVANS FLUID MOTOR 2,412,877 ' 7 Filed April 12, 1945 4 Sheets—$heet 4 7.129% rm 34 / a; L \ '24 _Z71%.4. 2,412,877 Patented Dec. 17, 1946 UNITED STATES PATENT OFFICE 2,412,877 FLUID MOTOR Eugene M. Evans, Jefferson City, Mo., assignor of one-?fth to E. J. Tietjen, Je?‘erson City, Mo. Application April 12, 1945, Serial No. 537,944 2 Claims. (01. 253-65) 1 2 This invention relates to ?uid motors for actua tion by liquid or gas, one of the objects being to provide a motor of this type which is of simple construction and utilizes, as an essential part thereof, a casing de?ning a helical passage for ‘the ?ow of ?uid from an inlet to an outlet, said casing constituting a stator in which a rotor, in the form of a disk, is mounted for rotation about the axis of the helix and between the inlet and outlet invention consists of certain no-vel details of con struction and combinations of parts hereinafter whereby ?uid passing through the casing must, of necessity, flow laterally through the rotor through more fully described and pointed out ll}; the claims, it being understood that changes may be made in the construction and arrangement of parts With out departing from the spirit of the invention as claimed. In the accompanying drawings, the preferred form of the invention has been shown. In said drawings: 10 Figure 1 is a top plan view of the motor. Figure ‘2 is a developed or displayed section opposed arcuate openings, the rotor being so shaped and positioned that this lateral ?ow of the ?uid will set up a rotation thereof so that the rotor thus can be utilized as a driving element. through the rotor and stator taken through 360 degrees. , ‘ Figure 3 is a section on line 3-3 Figure 1. 15 Figure ‘l is a section on line 4—-& Figure 3. Figure 5 is a section on line 5—-5, Figure 4. A still further object is to combine with the helical passage a yieldingly restrained valve whereby the ?ow of ?uid from the inlet through Figure 6 is a plan view of a portion of the rotor.‘ Figure '7 is a section on line 1--‘! Figure 6. determined rate, there being by-passing means by 20 Figure .8 is a view on a reduced scale of the in ner face of the inflow section of the stator. which the minimum speed of rotation and rate of Figure 9 is a view of the inner face of the out ?ow can be maintained under idling conditions but the valve being designed to open automatically ?ow section of the stator, this view ‘also being on a reduced scale. or else under the control of the user, thereby to in crease the rate of ?ow and proportionately in 25 Referring to the ?gures by characters of ref erence, A designates a casing or stator contain crease the speed of the rotor. ing a helical passage l leading from a ?uid inlet It is a further object of the invention to pro 2 to a ?uid outlet 3 and this passage de?nes a vide a structure of this character which can be single convolution. The casing or stator A is‘ di used for various power purposes. It is also useful as a means for feeding chemicals into ?uids while 30 vided along a plane perpendicular to the axial center of the casing so as to divide the casing into ?owing through the casing, the feeding of the an intake section 4 and an out?ow section 5. The chemical by rotor-actuated means, being such as two sections are held securely together by bolts 6 to maintain a predetermined proportion or ratio or the like extending through marginal ?anges ‘l during variations in the rate of ?ow and in the speed of rotation. 35 and the meeting faces of the two sections coop erate to form a circular recess or working cham Another object is to provide a structure of this ber 8. character which will stand up during long con Those portions of the helical passage within tinued use, which will not be a?ected by hard sub the respective casing sections are closed adjacent stances, such as sand or grit, which may be di rected thereinto, and which can be installed in 40 to the recess 8 except for arcuate slots o-r ports the rotor to the outlet can ‘be maintained ata pre various positions without impairing its Working qualities. , 9 and It which are located directly opposite each Another object is to provide a power device of this character containing but few parts and which can be caused to operate from aminimum ?ow of 45 1/4 square inch at the inlet up to any maximum other, the port 9 constituting an outlet into recess 8 from the intake section of the casing, while the port I 0 constitutes a ?uid inlet for the out?ow section of the casing. . ‘ Adjacent to the inlet 2 and within the stator is a valve chamber ll normally- closed by a remov able cover plate‘ l2, and at the bottom of this chamber is an inclined seat 13 adapted to be en mal ?ow rate. A still further object is to provide a motor of 50 gaged by a flap valve M which is yieldingly held ?ow, subject to the size of the motor, a steady op eration' being insured up to three times the nor this type which, while designed primarily for actuation by liquid, can also be driven by gases under pressure. , > With the foregoing and other objects in view which will appear ‘as the description proceeds, the 55 to its seat by spring l5. A by-pass it is located back of the seat I3 and maintains constant com munication between the inlet port 2 and the re cess 8. , A disk I’! constituting a rotor is positioned for 2,412,877 4 3 at a greatly reduced speed, and occurs only when the ?uid entering the inlet tube is of small vol ume and has a low rate of flow. As the .rate of of transverse openings l8 separated by parallel ?ow increases and the pressure against the closed inclined blades l9 all these openings being located valve proportionately increases, said valve will be where they will move successively between and opened a distance dependent upon the pressure close to the arcuate ports 9 and It. The blades thereagainst and as the valve opens, ?uid is re H! are pitched to impart rotary motion to the disk leased past the valve so as to partly or entirely i‘! when ?uid is directed against the blades from ?ll the intake section 4 of the helical passage and the by-pass l6 and also when released by the opening of valve 14. 19 from this intake section this released ?uid will be directed through the arcuate outlet port 9 against For the purpose of indicating the position of the valve It the pivot pin 2!] on which it is' "all of the blades I9 exposed within said port. free rotation within the recess 8 and is provided, adjacent to its periphery, with a circular series mounted, rotates therewith. One end of this pin 7 f Thus the rotor will be driven at an accelerated speed and the ?uid passing between the blades is extended outwardly from the wall of the chamber H and carries an index or pointer 2| which 15 will be received by the arcuate port l0 and de livered into the out?ow section of the helical is located where it can be viewed by the attendant. . passage. As the speed of rotation increases due Disk I1 is secured to a shaft 22 journaled in a to the increased ?ow of ?uid against the rotor, suitable bearing 23 and also within the upper and the delivery of a chemical into the outlet 3 will lower walls of a transmission housing '24 which is ' carried by the stator or casing A. Mounted on 20 proportionately be increased so that a predeter mined ratio thus will be maintained. As the ?ow this shaft within the housing is a drive screw or in port 2 diminishes, the valve I3 will gradually worm 25 which is in constant mesh with the worm gear 28 secured to a cross shaft 21 carrying an move toward its closed position with a corre sponding reduction of the speed of the rotor. eccentric 28 in the form of a pin which is off center and in engagement with one end of a con 25 The arcuate intake port I0 extends through ap necting rod 29. This connecting rod is pivotally proximately 345 degrees, while the port 9 opening joined, as at 30, to a shank 3i mounted for recip rocation in the base 32 of a housing or casing 33. This housing or casing has a head 34 provided thereinto extends almost the same distance, the faces of the two sections 4 and 5 overlapping'only at the points b and 0 between the ends of the with an outlet port 35. The movable end 36 of a 30 ports and at opposite sides of the rotor. Thus bellows pump 31 is joined to the shank 3| while any vacuum which might be created at the point the opposed or stationary end of the bellows, in— of in?nity of the meeting tapered portions of dicated at 38, is ?xedly secured to the head 34 and has an outlet 39 opening into the port 35. Port the helical passage is overcome. . , ' Attention is called to the fact that by providing 35 constitutes a connection between in?ow tube 35 a helical passage, the arcuate port 9 is extended 40 and anout?ow tube 4i and it is to be under substantially throughout the circumference of the rotor and the same likewise is true of the intake stood that the out?ow tube 4| can be extended to and open into the ?uid outlet 3 of the stator. A As the two portions of the helical passage at check valve can be located at any suitable point in the tube 40 as indicated at 42 so as to prevent 40 opposite sides of the rotor are duplicates, ?uid di rected from one to the other through the rotor return ?ow of ?uid within'said tube. Another will ?ow freely without creating any back pres check valve 43 can be located in the tube 4| for sure so that unrestrained movement of the rotor the purpose of preventing return ?ow of ?uid is thus insured. Furthermore, the actuation of after it has been forced into said tube 4|. An 45 the rotor in itself serves to throw the impelling additional check valve 44 can be located in tube 4| ?uid frombetween the blades and into the out adjacent to the outlet end thereof. arcuate vport It. ‘ ' I V _ > ' ?ow section of the stator so that the rotor thus The apparatus herein described is designed becomes self-clearing. , , . primarily as a chemical feeder although, as has What is claimed is: _ ‘ ' already been stated, it can be used as a power de 50 1.,A ?uid motor including a stator having a vice or motor for other purposes. When used as a chemical feeder, the pump formed by the bellows 3'! is successively expanded and contracted so that the chemical to be fed into the ?uid passing through the stator, will be successively sucked 55 helical passage therein provided with an inlet and an outlet at respectiveends thereof, said stator being divided atthe center of the passage along a plane perpendicular to the axial center of the passage, thereby to provide an in?ow sectionand through the tube 40 into the bellows and ex an opposed out?ow section, each of said sections pelled from the bellows into the tube 4| from having an arcuate port extending through ap which it will be discharged into the outlet 3. As proximately 345 degrees, and a disk mounted for thisbellows is operated by the rotation of shaft 21 which, in turn, receives its motion from the 60 rotation between and coaxial with the ports, said disk having a circular series of spaced blades rotor I‘l, it is to be understood that the amount pitched to successively receive the impact of ?uid of chemical expelled into the outlet 3 can be main ?owing from the in?ow section to the out?ow sec tained constantly at a predetermined ratio to the tion, that portion of the helical passage in one rate of ?ow of the ?uid within the stator. section being tapered off from the inletof the Fluid entering the inlet 2 will be discharged 65 stator to the remote end of the arcuate port in continuously in the form of a small jet, through said section and that portion of the helical pas the by-pass l6 and the impact thereo; against the sage in the out?ow section being. tapered off in; adjacent inclined blades [9, will obviously cause wardly from the outlet port of the stator tothe the ,rotor'to travel in the direction indicated by remote end of the arcuate port of said out?ow the arrow at in Figure 2. The ?uid ?owing against 70 section, and a spring-restrained valve within the and passing between these blades will thus be de helical passage adjacent to the inlet of the sta livered into the outlet [9 and ultimately be de tor and normally spaced between the ends of the livered through the discharge end of the out?ow arcuate port in the in?ow section of the stator, section 5. Thus constant rotation of the rotor is insured although this'normal rotation- will be 76 there‘. being a by-pass for maintaining constant communication ‘ between said inlet port of the 5 2,412,877 stator and the rotor, thereby to maintain constant motion of the rotor under the action of ?uid en tering the inlet of the stator. 2. A ?uid motor including a stator having‘ a helical passage therein provided with an inlet and an outlet at respective ends thereof, said sta tor being divided at the, center of the passage along a plane perpendicular to the axial center of the passage, thereby to provide an in?ow sec- » tion and an opposed out?ow section, each of said sections having an arcuate port extending through approximately 345 degrees, and a disk mounted for rotation between and coaxial with the ports, said disk having a circular series of spaced blades pitched to successively receive the impact of ?uid ?owing from the in?ow section to the out?ow section, that portion of the helical passage in one section being tapered off from the inlet of the stator to the remote end of the arcu 6 ate port in said section and that portion of the helical passage in the out?ow section being tapered off inwardly from the outlet port of the stator to the remote end of the arcuate port of said out?ow section, and a valve within the heli— cal passage adjacent to the inlet of the stator and normally spaced between the ends of the arcuate port in the in?ow section of the stator, there be ing a by-pass for maintaining constant communi cation between said inlet port of the stator and the rotor, thereby to maintain constant motion of the rotor under the action of ?uid entering the inlet of the stator, and a spring positioned to re sist movement of the valve from its seat, said spring being proportioned to permit movement of the valve from closed position in proportion to the pressure of fluid against the valve. EUGENE M. EVANS.