US2217796A

US2217796A - Pumping apparatus

Info

Publication number: US2217796A
Authority: US
Inventors: Dell Norman Eugene
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-01-07
Filing date: 1938-01-07
Publication date: 1940-10-15
Anticipated expiration: 1957-10-15

Description

Oct. 15.194

N. E. DELL PUMPING APPARATUS Filed Jan. 7, 1938 2 Sheets-Sheet 1 Oct. 15, 1940. N.- E. DELL 2,217,796

PUMPING APPARATUS Filed Jan. 7. 1938 2 Sheets-Sheet 2 ln uenturj I11: I'manELD B [L iz q/ Patented Oct. 15,1940

7 21211796 L Q PUtmi G APPARjATUs I Norman Eugene Dell, Bufialogl l. 'Kpplicatioii January '7, 19 38; 3,733"

' v 1 Claim; i (01. 103 461) sweet of my invention s to provide n apparatus for creating either fluid or gas pressures and wherein the pump is contained'yvithin a tank whiohalso contains a fluid. or gas", such as air and water, under pressure, and whereby through the actuation or the pump, the water or air can be drawn off unde pressure; A furthe ibbjet of my invention is to" direct fliiid's'uc'h as water under a lowjpressure into the "puinp and through the actuation of the pump.

in the" tank to deliver thewater intdthe:

undera greatly increased pressure. p, A s'tillfurthe'r andiniportant' object of my intventionis' to constructmy pump with a plura'litji of rotatableradially extending pistons and cy1in-" der's, and wherein the pistons are 'reciprooate'gi by an eccentric ring guide which surrounds theiraxis o f rotation, and wherein thepressures at" bbth ends of each piston are equalizedlat certain 7 portions'of the pistons travel around the 'eccen-- tric ring, as'shallbe hereinafter explained;

With"these and other objects in'ifiew, my in-f',

vention consists of a pumping apparatus con-' sti'ueted and arranged all' as hereinaftef'f 'morejj 'particularly' described and illustrated in the'accompanying' drawings," in which; i Figure l is a" transverse cross-sectional View through my tank and pump; being taken through W the 'line' I l", Figure 2.

i u 2 is Va. longitudinal 1 sectional View through the tank and pump, being taken through Figure 3f isanfenla'rged cross-sectional view1 through one of the 'otatable cylinde'rsandpi's? toii's of the" pump, being taken through the line 3-4; Figure 1:

through th ej portion of the eccentric guide'im dicated. h y the line 4 4, Figure 1, oneof the m 'p-istonshoe assemblies being;

point; r 7

taken through the -line' 5'-5f, Figure 11' and,

- Figure 6 is'a n enlargedlongitudinal crosssef g tienal'view through'a'fragmentary portion of the cylinder head and piston contained-therein shew-i ing the piston engaging the outlet valve a"d-- noxem; it open during th"'pbrtion' of ts m'ojv menses-manner end of itss'tr'oke.

ins-5: "The apparatus comprises ait'ank I which. ca

beof any suitable construction, and=a;s*shown 'r'iinthedrawing$;i is iofi cylindricahiorrri its;

. t. .e e fi ie Figure-4 is" an; enlarged cross-sectional view' shown as at that upper outlet 2for drawing off air and-a a ki i hl r and lower r d pipes- 4 and 5 through hich the air pressure or at h a h b i 1 Within t e an om outside sources i'n'cas'e here the constant pres surel'which'shbuld hem intained at all times in the tank, hasfpn guqwed to dr p a H "iI "i l fa htil t ati l hav only Shown onepurrip'st'ruoture within the tank, but it is to e i d s qbill tha ba e i f n m st t e y; 1 s iita n w it in, a s e t The ump structure} illustrated, consists of four l nde 6 'llii h ar Q eaat h i ne e amwma erm 'a d l w ssl ucmrel. Th 'c s i I i d lvi' in qiwo 9pm en ed chambers 4 I" arid 42 by a transverse partitionfiB. h e r 1; isisss r iupqn. theeen et t' bl sh ft 8 ti /high protrudes romj hetank through asuitabl-e airght ageh twent e'pib l t nd the" rotatable not lows It a; ,aiiid in the gr w ngsl have shqwn the e r, the pip'e uor mea with a flan e rs;

which 'is ijn turn rptat'abl'y contained withinv a haped htiu's'ing l6 carriedupon' and rotatabljwiththe shaft' Suitable packins IT are 'e'erithels'ides ofthfi'ange l5 and the iim fa'cesfdf th hqusingvlfi.

he H ia le af s tationary; 03151 g Whi'hisiri turn contained.- Within the'taink'. 'S'iichho'using consists of. apair; of encl plates 8 Whicharepositioned upon either 3 OfrbtatiQn' fth'e cylinders} idv ar pr dedlwit ssl h v th which th; shaftIf (enteritisand within which the" sha ftf r'ot f The peripheral-portions of the end plates gi to a ring-likeeccen-"i trically shaped earn; mber 20in any suitable mariner," such hi7 bolts 21, and the assembly a v I .J of the eccentric-ring 20 and end plates I8 is; Like chara'ctersof reference indicate-corres' ponding parts in the-different views oi-the draw'f' rigidly retained. irrplace' by suitable brackets 22 which'aref'setui'ed tdtheinrier race of the ta'nkl.

vEach o'f th'rdta-tablecylinders 6' contains "af reciprocating piston"23 "which projects from the outer end of=its cylinder, The outer endofeach piston carries'a'shcefi 2'4whichis pivotally secured 111 i PrQ r l h ndoi h af 1 r tYPaQi d vi m hanism 01er s are contained within to a boss 25 formed upon the end of the piston. Each shoe 24 has a curved outer face 26 of the same curvature as a portion of the eccentric ring 20 as shall be hereinafter explained, and each shoe also carries two pairs of freely rotatable rollers 21, which engage certain portions of the eccentric ring 20 as shall also be hereinafter explained.

The rotatable boss portion 1 on the hollow shaft 8 carries four pairs of inlet and outlet mushroom valves 28 and 29, a pair of inlet and outlet valves communicating witheach' cylinder 6. The inlet valves 28 open from the chamber 4| into the cylinders, and the outlet valves 29:

open from the cylinders into the chamber. -42.

hub I. fluid pressure entering fromthe h01l'ow"'shaft8,

and each outlet valve 29 is actuated by the fluid pressure createdin its cylinder 6 under the downward movement of its piston 23. When the pistons 23 are moving outwardly in the induction strokes, the inlet valves 28 are sucked open and the outlet valves 29 are sucked'closed. When the pistons 23 are moving inwardlyin the eduction strokes, the inlet valves are pressed shut on their seats under the fluid pressure in the cylinders and the outlet valves are opened under the fluid pressure in the cylinders. In order that the tank air pressure'be admitted to the pump casing formed by the end' plates and eccentric ring 20, shielded orifices 32 are provided inthe end plates 18. A hollow shaft 58 extends from the chamber 42 and has its outer end 33 rotatably contained within a stationary elbow 34 carrying a downwardly extending delivery pipe 35 which has its lower openend submerged in the water in the tank I.

The eccentric ring20, which ispreferably of a shape substantially; the same as that shown in Figure 1, is constructed in the, following manner. The portion'36 of the ring extending in a clockwise direction from the point A to the point B, has a pair of raisedtracks 38, one on each side of the ring as shown in Figure' i, upon which the rollers 21 will roll when the shoes are travellingfrom point A to point vB, such tracks being raised suificiently above theface of the ring to lift andretain theface of the shoes 24 out of contact therewith. At the point'B on the ring 20, the tracks 38 merge into the same level as the face of the ring between the tracks so that theface of the shoes 24 at this point move into engagement with the face of the ring. Just past the point B on the'ring, the tracks 38 declin'e below the face of the ring, as illustrated in Figure 5, so that the rollers are out of engagement'with the tracks and the shoes are in sliding engagement with the face 39 of the portion 31 of the track. W a

The portion 31 of the ring extends from the point B to the point A in a clockwise direction and the face 39 extends between these two points. The face 39 is ground to the same curva ture asthe faces 26 of the shoes, the reason for which-will be made apparent,

At the point A in the ring, the tracks 38 gradually rise above the central portion 39 so that the rollers 21 on the shoes in passing the point A'again come into contact with the tracks 38 lifting the faces 26 of the shoes away from the face 39 of the ring. The lowerportion of the pump casing contains a reservoir of oil through which theouterends-of the cylinders and pistons move and also through which the shoes 24 travel.

Such oil level is indicated in Figure 1. The faces of the shoes in passing through the reservoir, becom'e coated with oil which, as the faces 26 move into engagement with the face 39 of the ring, is scraped to a very thin film between the two faces, resulting in the adhesion of the face 26 of the shoes to the face 39 of the portion 31 of the ring 20.

In order that the faces 26 of the shoes 24 may slide into tight adhesion,with the ,f'fac 139 of the ring 20 as they slidethereonto'; fform each outlet mushroom valve 29 with an extra stem 59 which is momentarily engaged by the head of the piston-duringthe inner portions of the pistons compression stroke, as illustrated in Figure 6, so

' that the fluid pressure in the cylinder will not be cut off, until the face 26 has moved into engagement with the face 37, thus maintaining the pressure the same at both ends of the piston and permitting the shoe to move into engagement with the face 39 by gravity. As the cylinders further rotate, the pistons move outwardly in the cylinders and pass out of engagement with the stems 59 of the valves, so that the valves then close and cut off connection between the tank fluid pressures and the cylinders;

The operation of my device is as follows;

It is to be assumed that the tank I contains a fluid such as water substantially up to the levelindicated in the drawingsyand that the.

air pressure in the portion of the tank above the water is fifty pounds, and also that a constant pressure of water at five pounds is fed from the supply pipe l4 into thehollow shaft 8 from where it can pass through the inlet valves 28 into the tons 23 can move outwardly from the position of the left-hand horizontal piston to the position of the vertical upper piston. 7

Referring to Figure 1, the lowervertical piston is shown as just completing its eduction stroke and about to commence its induction stroke. In this position the lower vertical piston will be holding the exhaust valve '29 open in the manner previously explained and the pressure on both ends of the piston will be equalized so that gravity will act on. the piston so that the face 26 will. slide into tight engagement with the face 31 at the point B. It will be noted that in travellingfrom the position shown to the point B, the lower vertical piston willbe lubricated and as the face 26 of the lower horizontal shoe comes into engagement with the face 39, the surplus oil will be wiped off the face 26 leaving only a very thin film of oil which causes the. face 26 to adhere to the face 39. j I

. The left-hand horizontal piston is shown in the position at the commencement of the induction stroke, and has travelled in a clockwise direction from the position of the lower vertical piston. The left-hand horizontal piston has the face of its shoe in close sliding adhesion with the face'39 of the portion 31 of the eccentricring; The portion 31 -of the eccentric ring'is shaped so that the piston can be moved outwardly to the full limit of its induction stroke. On the induction stroke the inlet valve is opened and the liquid is drawn into the portion'40 of the cylinder. The induction stroke is not. completed until the left-hand horizontal piston has reached the point A, travelling in a clockwise direction.

In the matter of illustrating the adhesion between the face 26 of the shoe 24 and the face 39 of the ring, an illustration is provided by placing a block of metal having a perfectly flat lower face upon a perfectly-flat oiled surface. The adhesion of the oil film to the under surface of the block and to the flat surface is sufilcient to prevent the block from being manually lifted up from the face of the oiled surface, although the block can be freely slid anywhere over such surface.

The outward movement of the piston will continue until that particular piston reaches the point A on the ring 20 at which point the raised side tracks. 38 commence. When the shoe reaches this point the lower portion 40 of the cylinder will be full of water. As the face 26 of the shoe 24 of the piston moves intocontact with the raised side track 38, the adhesion between the outer face 26 and the face 39 of the ring 20 will be broken and the face 26 will be moved away from the face 39. The pressure in the tank which enters into the pump casing [8 through the orifice 32 will still be fully effective against the face 26 of the shoe as well as against otherparts of the shoe and piston which are exposed to the tank pressure. Through the force of gravity, the piston will move inwardly until the pressure in the liquid in the portion 40 of the cylinder has been raised to the pressure in the tank.

' As the cylinder is further rotated in a clockwise direction, the contour of the ring 20 from the point A to the point B is such that the piston is moved inwardly to the bottom of its stroke, through the position illustrated by the righthand horizontal piston in Figure 1 to the position of the lower vertical piston. At this point the water from the lower portion of the cylinder has been expelled into the'tank. As the cylinder and its piston assembly moves in a clockwise direction from the position of the lower Vertical piston shown in Figure 1 to the point B on the ring, its shoe moves into slidable adherence with the face 39 of the ring and the piston then starts to move outwardly as illustrated by the left-hand horizontal piston in Figure 1, and the cycle is repeatved. Each cylinder and piston assembly has the same cycle in its rotation within the eccentric ring 20.

It will be seen from the foregoing description tank, that only sufiicient power will be required to raise the pressure of the fluid within the portion 40 to cause the exhaust valve to open and overcome the inertia of the contents and the friction of the pipe-line leading to the tank so that the contents will flow thereinto.

It therefore follows that the-useful absorptionv of power from the drive shaft for each piston occurs when it is pulled outwardly against the pressure within the stationary housing and not when the piston is urged inwardly, the latter movement being effected by gravity and serving only to transfer the fluid from the cylinder to the tank.

From the foregoing description it will be seen that I have provided a structure wherein a plurality of pistons and cylinders rotate within an eccentrically shaped ring, and wherein the shape of such ring actuates the pistons within the cylinders as the piston and cylinder structure rotates, and that by enclosing the pumping mechanism within the pressure tank a very simple and effective structure has been obtained. While I have shown a certain embodiment of my invention, it

is to be understood that I can make such changes and alterations as I may at any time deem necessary without departing from the spirit of my invention as set forth in the appended claim.

What I claim as my invention is:

In a pumping apparatus, a tank containing water in the bottom portion thereof and air under pressure in the upper portion thereof, a pump housing contained within the tank and from which the water is excluded, a fluid inlet pipe entering the tank and also the housing, a plurality of radially extending cylinders mounted for rotation about the pipe in the housing and communicating with the pipe, a second pipe communicating with the cylinders and extending from the housing into the tank, a piston contained within each cylinder a piston actuating cam ring surrounding the path of rotation of the cylinders, a pair of annular tracks formed on the inner face of the cam ring, saidtracks being at different levels on one portion of said cam ring and one of said tracks having a smooth oiled surface, a shoe carried on the outer end of each piston and having a smooth oiled surface adapted to engage the oiled surface track in slidable adhesion during the portion of each pistons rotative a roller also carried on the outer end of each piston and engaging the other track during that portion of each pistons rotative travel when it is moving inwardly in its cylinder, fluid inlet valves controlling communication between the fluid inlet pipe and the cylinders, and fluid outlet valves controlling communication between the cylinders and the tank.

NORMAN EUGENE DELL travel when it is moving outwardly in its. cylinder 5 i