US 1922196 A
Description (OCR text may contain errors)
Aug; 15, 1933. R s BUTLER 1,922,196
I Filed March 17, 1952 4 Sheets-Sheet 1 ulvzven L 07" 30567?! Jfiuzler Jzworrzgyp'.
Aug. 15, 1933. R s BU L 1,922,196
Filed March 17, 1932 4 Sheets-Sheet 3 I72 06727507" 120567 25 /S' fizczer R. S. BUTLER Aug. 15, 1933.
4 Sheets-Sheet 4 Filed- March 17, 1932 Int/6722907" 2305670 Jfiuzler flttorngg-S Patented "Au 15,. 1933 Robert's. Butler, Los Angeles, Calif assignor to Nordberg Manufacturing 00., Milwaukee, Wis., a Corporation of Wisconsin Application March 17, 1932. Serial No. 599,487
16 Claims- (Cl. 1l)3---148) My invention relates to an improvement inpumps and has for one purpose the provision of a valveless pump. One exemplification of my invention is the provision of a valveless pump in which one or more flexible tubes are employed,
the tubes having awave-like movement imparted, for example, to one wall, whereby individual bodies of material being pumped are trapped between opposed walls of the tube or tubes and are moved longitudinally along. the tubes in response to the wave-like movement of the approach and recession of the opposed sides of the tubes, the waves being true sine waves, tra lling uni-directionally along the tubes. Anot er object is the provision of improved actuating means for a pump of the type herein described. Another object is the provision of means for preventing access of the material being pumped to the actuatingmechanism. Another object is the provision of an improved flexible tube for use with such a pump. Other objects will appear from time to time in the course of the specification and claims.
I illustrate my invention more or less diagrammatically in the accompanying drawings, where- Figure l is a longitudinal section;
Figure 2 is a section on the line 2-2 of Figure 1;
Figure 3 is ure 1;
Figure 4 is a section on the line ure 3;
Figure 5 is a section on the line 5-5 of Figure 3; 35 Figure 6 is a detail of one of the tubes emp y d;
' Figure 7 is a section on ure 6;
Figure'B is an edge view of a securing member or wedge;
Figure 9 is a plan view of the member shown in Figure 8;
Figure 10 is a side view of one of the tubes, showing a variation;
Figure, 11 is a section on the line 11-11 of Figure 10; and
Figure 12 is a similar section through another variation.
Like parts are indicated by like symbols throughout the specification and drawings.
Referring generally to the drawings, A indicates any suitable inlet passage for the material being pumped, and A any suitable outlet'or delivery passage. Secured to the passage A I illustrate the double passage member A which may a section on the line 3--3 of Figthe line 7-7 of Fig- .of each wedge C be secured to the member A as for example by the bolts A It includes two branches or passages A A terminating for example in flanges A.
Secured to said flanges A is a main pump structure or housing. Referring for example to Figure 2 which illustrates the main pump housing in section it may include a central or inner member B shown as having at one side the side or cover plate B secured as by the screws 28 and closed at top and bottom by partitions l? B re-' 35 spectively having therein the lower bearing B and the upper bearing B the purpose for which will later appear.
Secured to each side of the central housing B is a side housing member including portions C, C 1w which may be secured together as by the bolts Q and may be'secured to the housing B as by the bolts C penetrating flanges or lugs C Positioned within the outer or side housing so formed are the flexible tubes C As these tubes are identical except for a reversal of direction, only one will be described. Each such tube includes a side wall C abutting against thewalls or inner faces of the members C C as shown for example in Figure 2. Each such tube has at its upper and so lower ends outwardly extending flanges C against which are positioned securing collars C which are engaged by locking wedges C The collars C have inclined faces C opposed to the corresponding inclined face of the opposed face 8% The wedge C further engages shoulders C iormed respectively in the members C C and in the opposed outer wall of the member B which extends outwardly as shown for example at C C in Figure 1. It will be understood that when the wedges C are driven home they strongly clamp the tube flanges C between the collars C and the opposed portions of the flanges A of the inlet passage A or against corresponding flanges A of the outlet passages A as shown in Figure 1. Any suitable opening may be made in the members C or C to permit be held in position as by the screw C The wall C of the tube may be reinforced or stifiened as by the reinforcement C which extends into the flanges C". The opposite or flexible wall of the tubehas no such reinforcement but is exteriorly provided with a plurality of dove-tails C the purpose of which will later appear.
Rotatably mounted in the bearing sleeves B B is a shaft D which may carry at its lower end bevel gear D mounted on a drive shaft D It will be understood that the shaft D may be rotated from any suitable power source not herein shown. The bottom B of the housing B is downwardly expanded as at D to give room for the shaft D and the gear D The shaft D may be held in position as by a ball D resting in the seat D in the form of a screwthreaded plug. The ball D takes the vertical thrust of the shaft D and reduces friction. Any suitable bearings D D may be employed for the shaft D and I illustrate the bearing D as formed integrally with the bottom portion 28 of the housing B, while the bearing D is associated with the cover plate B However, it will be understood that the driving connection and the mounting of the shafts may be made in a variety of manners.
Mounted for rotation with the shaft D are a plurality of eccentrics-E. These eccentrics are helically arranged or distributed in relation to said shaft for apurpose which will later appear and are illustrated as of cylindrical exterior. Surrounding each said eccentric is a stirrup E having flat bearing portions E? opposed to opposite sides of each said eccentric. The size of the stirrup is such that at erably the fit is so close that there' is no perceptible play between the eccentric and the opposed'faces E Extending in opposite directions from each such stirrup is a pin E The pins E pass through apertures E in the side walls of the chambers and penetrate into the space between said side walls and the flexible tubes above described. Each such pin carries at its end a cross piece E which may, for example, be screwthreaded thereto. Each such cross piece is in dove-tailed relationship with one of the dovetails C above described. E indicate packing -members surrounding each pin E and herein shown as tapered to seat in corresponding tapered seats E formed in connection with the apertures E. E are coil springs compressed between the packings E and the cross pieces E The springs tend to hold the packings firmly seated, thus maintaining a liquid proof closure about each pin E This is important in case of rupture of the flexible tube, since the fluid is thereby prevented from penetrating the central housing B 'which is preferably filled with oil to lubricate sine wave. In order to prevent wear and rupture of the flexible tube C at its ends or points of connection, I provide a lesser travel of the pins E nearest the top and bottom of the shaft D. This will be clear from the showingof the structure in Figure 1. The parts are'so. proportioned and the pins E of such length that the'sine wave crests travel in staggered relationship uni-directionally along the twotubes. As shown in Figure 1 the crest of approach of one tube is 0pposite the crest of recession of the other.
. Referring tov the form of Figures 10 and 11, I illustrate a form of tube. the fixed wall C of which is provided with a plurality of suction cups G 11 times the ec-- centric engages only the flat por ions E and prefa bevelled pinion D in mesh with any suitable which perform the same function as the reinforcement C in preventing the normally fixed wall C from receding from the inner face of the members C C Referring to Figure 12 I illustrate a form of tube in which both sides are dove-tailed as at G the dove-tailing being effective to secure the side C to the housing and to secure the opposite side to the cross-pieces E It will be realized that whereas I have described and shown a pratical and operative device, nevertheless many changes might be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and showing to be taken as in a broad sense illustrative and diagrammatic rather than as limiting me to my specific showing.
The use and operation of my invention are as follows:
Assume that two tubes are employed which communicate at one end through the passages A A with a common source of liquid and communicate at the other end through the passages A at A with a common outlet A As to each' individual stem or pair of stems E when it is in tube closing position in relation to one tube, it will be in tube expanding position in relation to the other, the movement of the two tubes being always opposite at any given point. The number of stems and eccentrics is such, in relation to the length of the device, that there is always a continuous closure in each tube. Referring for example to Figure 1 it will be understood that when there are two wave crests of closure in one tube, there will be at least one wave crest of closure in the other. There will never be less than one or more than two such crests of closure in the form of pump as herein shown. I do not wish to be understood to be limited to a maximum of tube, as under some circumstances I may wish to lengthen the device and provide a maximum of more than two. But it is essential that there should be a constant closure in each tube, as the closure point or crest performs the function of the valve of a pump, and without it the pump will not function. Referring to Figure 1, the trapped liquid X of the left hand tube exerts no pressure, and is merely trapped between wave crests. The zone of pressure or of 125 effective application of force is always beyond the advance crest. In the opposite tube it is beyond the single crest illustrated. In the space between the two crests on the delivery side of the pump the liquid is under pressure,- and directs back pressure against the walls of the tubes. This pressure is uniform, but its effective application is not. In the position of the parts shown in Figure 1 the effective application of pressure against the inclined wall shown at the left is not 135 as great as the effective application of pressure against the horizontal wall shown at the right at the top of the tube. In one case it is directed against an inclined wall as at Y and in the other it is directed against a fully opened tube wall as at Z. Therefore, the left hand is borrowing hydrostatic pressure from the right hand side, tending to assist in keeping the wave of crest closed. Note that the terminal fingers at ,each end of the pump have a travel somewhat less than that of the other fingers or cross pieces and do not come fully to closed position. This is necessary to prevent undue strain upon and breakage of the ends of the tubes.
Note also that the shaft D and its bearings and- 150 the eccentrics E .and the connections between the eccentrics and the members E are all housed within the central closed housingB. In case of suitable lubricant may be maintained within the housing 13 and a further advantage of the helical arrangement of the eccentrics rests in the fact that it may be employed to raise 'an oil or lubricant within the interior chamber. The
lubricant will tend to ride up the central shaft and to flow down along the insideof the wall. An important advantage of the two tube type of pump herein shown, or of the employment of an even number of tubes, is the maintenance of hydrostatic balance, the delivery of an'even flow of fluid.
It will be understood that although I have illustrated a two-tube type of pump that I may employ a single tube or a multiplicity of tubes.
1. In a pump, a pair of flexible walled chambers, and means for maintaining a uni-directional wave-like movementof approach and recession of opposed chamber walls simultaneously along both chambers, with the crests of the waves moving longitudinally along said chambers in staggered relationship.
2. In a flexible tube'pump, a tube member having a flexible wall, and means 'for producing a wave-like movement of said flexible wall, with crests of approach and recession, said means including a plurality of stems movable along axes perpendicular to the general longitudinal axis of said tube, said stems being connected to said wall.
3. In a flexible tube pump, a tube member having a flexible wall, and means for producing a wave-like movement of said flexible wall, with crests of approach and recession, said means including a plurality of stems movable along axes perpendicular to the general longitudinal axis of said tube, said stems being connected to said wall, and actuating means for said stems, including a shaft and a plurality of eccentrics thereon in operative connection with said stems.
4. In a flexible tube pump, a tube member having a flexible wall and means for producing a wave-like movement of said flexible wall, with crests of approach and recession, said means including afplurality of stems movable along axes perpendicular to the general longitudinal axis of said tube, said stems being connected to said (Ill wall, and actuating means for said stems, including a shaft and a plurality of eccentrics there- 'on, said eccentrics being helically arranged along said shaft, and being adapted to produce a true sine wave in the Wall.
5'. In a pump, a chamber, means for imparting to said flexible wall a true .sine' wave movement havingcrests of recession a flexible wall, and v 7. In combination with a pump having a flexible walled passage, a flexible wall for said passage,.a driving shaft, a plurality of eccentrics helically arranged about said driving shaft, actuating stems in operative relationship with said eccentrics and adapted to be reciprocated there'by, means for constraining said stems to axial reciprocation, and an operative connection between each said stem and a flexible wall of said pum passage.
8. In combination with a pump having a plurality of passages, a flexible wall for each said passage, a driving shaft, a plurality of eccentrics, helically arranged about said driving shaft, actuating stems in operative relationship with said eccentrics and adapted to bereciprocated thereby, meansfor constraining said stems to axial reciprocation, and an operative. connection between each end of each said stem and a flexible wall of one of saidpumppassages.
9. Ina pump, a passage member, a flexible wall therefor, and means for imparting to said flexible wall a true sine wave movement having crests of therealong, in relation to an opposed passage -wal1, an inner pump housing, and actuating means for imparting said sine wave, said actuating means being positioned within the inner pump housing, and liquid-tight closure means interposed between the actuating means and the flexible wall.
10. In a pump, a passage, a flexible wall therefor, an inner pump housing, pump actuating means within said inner housing, liquid-tight closure means interposed between the actuating meansand the flexible wall, and actuating connections extending through said inner pump housing and closure means, said connections being secured, externally of said pump housing, to said flexible wall.
11. In a pump, a passage, a flexible wall therefor, an inner pump housing, pump actuating means within said inner housing, actuating'stems extending through'said inner pump housing, and liquid-tight packing means, about said stems, associated with said inner housing, the outer ends of said stems being in actuating connection with the flexible wall. I
12. In a pump, a pump passage, a flexible wall therefor, and means -for constraining said wall to a true sinewa'v'e movement having crests of approach and recession, said means including a shaft and means for rotating it, and connections between said shaft and the flexible wall adapted to move the flexible wall toward and away from an opposed wall in accordance with said true sine wave movement. g
13. In a pump, a pump passage, a flexible wall therefor, and means for constraining said wall to a truesine wave movement having crests of approach and recession.
14. In a pump, a pump passage, a flexible wall therefor, and means for constraining said wall to a true sine wave movement having crests of approach and recession, said means including a plurality of driving members, and means for ac tuating them, and dovetail connections between said driving members and the flexible wall adapted to move the flexible wall toward and away from an opposed wall of the pump passage.
15. In a pump, a pump passage, a flexible wall therefor, and an opposed normally fixed wall, and means for imparting a wave-like movement to the flexible wall, with crests of approach and recession moving uni-directionally along said flex- Mil ible wall, said means including means for moving said flexible wall directly toward and away from the opposed normally fixed wall.
16. In a pump, a pump passage, a flexible wall 5 therefor, and means for imparting a wave-like movement to said wall, having crests of approach and recession traveling uni-directionally thereon,