US1379785A - Pump - Google Patents

Description

A J. S. SHOCKLEY.

PUMP.

APPLICATION FILED SEPT- I6| 918.

1,379,785. f Patentedl May 31,1921.

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PUMP.

APPLICATION FILED SEPT2 Is, |918.

1,379,785. "Patented May 31, 1921.

2 SHEETS-SHEET 2.-

.TILES S. SHOGKLEY, or NASHVILLE, TENNESSEE, .asSiGNonfro,THESHOOKLEY MOTOR COMPANY, or Nesnvrnnr., TENNESSEE, A CORPORATION or Diane;

WARE.

PUMP.

To @ZZ w 7mm t muy concern.'

Be it known kthat I, Jrnns S. SHOOKLEY, a citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, have invented a certain new and useful improvement in Pumps, ofk

which the following is a full, clear, and eX- act description, reference being had. to the accompanying drawings.

This invention relates to improvements in pumps of the rotary type, and has for its object the ,production of ay very durable,

smooth running pump of extremely high ef-` ficiency; wherein the working parts are easily accessible, and'operate with a minimum degree of friction; and wherein, by

the use of suitable joints and packing ele- Vments, leakage is effectually prevented.

A further object comprehended by my invention-is the production of a pump of the foregoing nature through which hard subn stances, such as gravel, slugs and the like may be circulated without injuring the pump or interfering with its operation. And again, more generally, it is an object of my invention to provide a simple construction through which the foregoing objects are attained.

To thesey ends my invention may be defined as consisting ofthe combinations of elements set forth in the claims annexed hereto and illustrated inthe drawings accompanying and forming a part hereof and wherein Figure 1 is a sectional front elevation of my improved pump; Fig. 2 is a sectional end elevation, the plane of section being indicated by either of the two section lines 2-2 of Fig.`1; Figs. 8, 1, and 5 are sectional details on the respective correspondingly numbered lines of Fig. "2; Fig. 6-

shows, in perspective, parts of the valve element in separated condition; vand Fig. `'7 is a horizontal section through the base on line 7 7 of Fig. 1.

In its present embodiment, my invention is incorporated in what may be termed a win pump comprising generally a' base 1,-

pump casings 2 and 3 which are mounted upon ends of the base, and a driving ele-l ment, herein shown as a pulley, is situated between the pump casings foroperating the pumps.

rEhe base 1 consists of a hollow casting divided by a longitudinal partition 6 into Spe-cicatoii of Letters Patent. j Pmtmtd Mmm; 31, 192i.

Application ledleptember 16, 191,8. Serial No'.V 254,336.

an inlet compartment and an loutlet compartment 8. f1 supply pipe 9 is shown as,

having communicative connection with the central portion of the inlet compartment 7 and 'an exhaust'pipe 10 has similar connection with theoutlet compartment at a point opposite the piped). It will be observed that the ends of the base turn upward and that .the upper. face of each end is smoothed off to form a supporting surface for one Of the pump casings Each of the compartments 7 v*and 8 opens through circular aper-` tures Iformed in these surfaces, and each aperture isl surrounded-.by a` depressedv a plate 17. Below the chamber 15, the 'cas-- ing contains inlet and outlet passageways 18 and 19 ywhich open through its bottom wall into the chambervand which also oominunicate with the compartments v7 and 8 of the base 1, the passageways being separated by a transverse partitionv wall 2O which registers withthe partition 6 ofthe base. lt will be noted, Yupon referring to Fig. 2, that a' depressed seat 21 surrounds. the lower' ende.A of the passageways 18 and- 19 and, with the previously -mentionedde-v pressed seats of the base, constitute annular confining recesses for the packing rings or gaskets 22 of lead or other compressible ma# terial, the casing and base being clamped firmly together by screws 23 vor their equivalents. Because of the confinement/Of the gaskets 22, there is no danger of their being blown lout by the Vhigh pressure generated within the pump.

A. pivot pin25 is supported at its middle'v within a lug 26 that extends inwardlfrom the outer wall of the passageway 18, the lugk being situated at the transverse center of the passageway so that the ends ofthe pin are exposed. A valve velement 28 is journaled upon the pivot pin 25 and-'comprises halves 29 and 30, shown in detail in Fig. 6. Each half ofthe valve element has an arm 31 that terminates at one end in a cylindriico cal boss 32 that is journaled upon one end of the pin 25, and preferably an anti-friction bearing, indicated at 32a, is interposed between the pin and boss. rthe opposite ends of the arms 31 carry sections of a fin 88 which has its outer face curved on an arc described from the center of the pin; and the surface of the wall 2O across which the fin is designed to move when the valve element is oscillated, is shown Y:similarly curved. Perfect freedom of movement of the valve element requires that the adjacent surfaces of the wall and iin be slightly spaced apart, and to prevent leakage between the surfaces I employ a packing consisting of a bar 35, contained within a groove 36 in the wall 2O and urged into contact with the face of the fin by a leaf spring 87 that is interposed Abetween the back of the bar andthe opposed wall of the groove. The two sections or the halves of the valve element are secured together by a screw 88 which passes freely through bores in one of the halves and is threaded into the other, a dowel pin 39, which occupies registering recesses in the two halves, assisting in holding them in proper fixed relation to each other. Vhile the passageways 18 and 19 open through the sides of the casing 2, it will be observed that they are of less width than the casing where they open into the chamber 15, leaving the edge portions of the cylindrical wall of the chamber unbroken at its lower side except at the point where the iin 88 enters the chamber. To retain the reduced sections of the chamber wall on each side of the opening of the passageway 18 in proper position, l connect the free ends of such reduced portions to the face platesV 16 and 17 by dowel pins 40, or their equivalents. My reason for retaining the cylindrical wall of the chamber 15 unbroken so far as possible will presently become apparent. The valve element 31 is elevated to project its fin 83 into the chamber 15 by means which 1 shall now describe. Substantially coincident with the vertical center of the inlet passageway 18 is an internally threaded hollow boss 42 in the base. into this is screwed the upper end of a cup 43 which contains a helical spring 44. A. head 45 fits into the upper end of the spring and is guided within the cup and has a flange 45 that rests upon the spring. A rod 47 rises from the head 45 and its upper end is forked to receivel a beam 48, the ends of which bear upon the arms 31 of the valve element. 1t is clear, therefore, that the spring 44 constantly tends to elevate the valve element and projects its 1in 88 into the chamber 15. The beam- 48 is held against withdrawal from the forked end of the rod 47 as by a Cotter ,pin 49 that extends through the branch of the fork above the beam; and the lower edge of the beam may benotched to embrace the crotch of the fork to hold the beam against longitudinal displacement. 1t will be apparent upon reection that the beam 48 serves as an equalizer to distribute the force of the spring 44V evenly between the two ends of the valve element.

vThe inner face plate 17 of each of the casings 2 and 3 has a central boss 50, containing an anti-friction bearing 51 within which a shaft 52 is journaled, a suitable stuihng box effectually closing the outer end of the boss 5() so as to prevent leakage about the shaft, At its end adjacent the chamber 15, the shaft 52 is provided with a disk 55 which carries a crank pin 56, offset a suitable distance from the shaft 52 and extending to within a slight distance of the outer face plate 16. rThe hub 57 of a rotor or piston 58 is ournaled, through suitable antifriction bearings 59, upon the crank pin 56, and a transverse line of its periphery is constantly in contact with a portion of the cylindrical wall of the chamber 15. The piston 58 has a working lit between the opposed face plates.

The adjacent ends of the opposed pump shafts 52 are coupled together by a connection consisting of a sleeve 60 having transverse key slots that register with key slots in the shaft sections and designed to receive wedge keys G1 that are driven through the sleeve and shaft sections and tend to draw the shaft sections toward each other. rllhe hub of the pulley 4 may be secured by any suitable means to the coupling or sleeve 50.

The method of assembling and disassembling the apparatus will be clear to those skilled in the art, although it may be stated that to remove the pump shafts, the pulley, which is split, may have its halves separated, and removed from the sleeve so that the keys 61 may be dislodged. rl`he outer face plates 15 of the pump casings may be removed, and a pointed instrument inserted through the aperture 64 of the sleeve er coupling 60 between the ends of the shafts 52 to start them, when they may be withdrawn endwise through the pump casings.

ln the operation of the apparatus, the pulley is driven by suitable means to rotate the shafts 52 in the direction indicated by the arrow in Fig. 2. This results in each piston 58 being moved about in rolling contact withthe cylindrical wall of the chainber 15. yit travels up the right hand side of the chamber, as viewed in Fig. 2, it starts to suck in a quantity of fluid through the passageway 18, the receiving chamber, or that to the right hand side of the fin 38, growing gradually larger as the piston is advanced in the direction of the arrow, an-d the suction is continued until the point of contact between the piston and the chamber wall reaches the exhaust passageway 19, it

-' chamber and through the exhaust passage-y being understood that the n 33 ascends and descends with the action of the piston while bearing constantly thereagainst. .I ust as soon as the point of contact between the piston and chamber wall moves again to the right of the iin,lthe pump starts to inhale a fresh' supply offluid while that previously drawn in is being forced about the way 19.

'I have vpreviously'statedvthat solid particles, such as gravel or slugs, could be circulated through the pump without -injuring it or interfering with its operation. This is due to that fact that such particles tend to follow the point of contact between piston and cylinder rather than to fall back and travel just in advance of such point,

because the velocity of the fluid tends to throw such particles forward and the centrifugal action maintains them adjacent the cylindrical wall where the velocity of the fluid is naturally the highest.

By leaving extensions of the chamber wall on each side of the inlet and outlet passageways 18 and 19 the piston is provided with a continuous track or supporting surface so that, even when vrunning at a high rate of speed, it has no tendency to drop into the passageways but will run smoothly over the parts without the slightest knock.

Having thus described my invention, what I claim is l. In a pump of the character set forth, the combination of a casing having a cylindrical chamber, a cylindrical piston of lesser diameter than the chamber and situated therein, means for impelling the piston about the chamber in contact with the cylindrical wall thereof, the chamber having an inlet and an outlet port, a valve element pivoted exteriorly of the chamber and having a iin projecting through the cylindrical wall of the chamber between said ports, and bearing upon the cylindrical face of the piston throughoutv the breadth thereof, a rod, an equalizer interposed between said rod and the valve element, and a compression spring supported within the casing and tending to force the ro-d in a direction to engage the fin of the valve element with the periphery of the piston.

2. In a pump of the character set forth the combination of a casing having a cylindrical chamber, a cylindrical piston of lesser diameter than the chamber and situated therein, means for impelling the piston about the chamber in contact with the cylindrical wall thereof, the chamber having an inlet and an outlet port, a valve element pivoted exteriorly of the chamber and having a fin projecting through thecylindrical wall of the chamber between said ports, said valve element having spaced parts, a bar having its ends bearing against said parts, a rod having a forked end loosely embracing the central portion of the bar, and a compression spring supported within .the casing drical wall thereof, the. chamber having an inlet and an outlet port, a pivot pin supported at its middle by the casing eXteriorly of the chamber, a valve element comprising opposed parts adjustable toward` and from each other and having each a hub that is journaled upon one end of the'pivot pin, meansfor securing the parts of the valve element together, said element including .a iin projecting through the cylindrical wall of the chamber, and means acting to move the valve element in a direction to engage its lin with the periphery of the piston.

4. In an apparatus of the character set forth, the combination of a base containing an inlet compartment and an outlet compartment, the ends of the base having surfaces through which the aforesaid compartments open, a pump casing surmounting each end of the base and having surfaces contacting with the aforesaid surfaces of the base, the casing having apertures registering with the openings in the base, pumping mechanism within each casing and 1nvolving a shaft projecting therefrom toward the other casing, a coupling element connecting said shafts, and a driving element mounted upon the coupling element.

5. In apparatus of the character set forth, the combination of a base containing an inlet compartment and an outlet compartment, the ends of the base having surfaces through which the aforesaid compartments open, pump casing surmounting each end of the base and having` surfaces contacting with the aforesaid surfaces of the base, each casing having apertures registering with the openings in the base', pumping mechanismL within each casing and involving a shaft projecting therefrom toward the other casing, means connecting said shafts, and a driving element attached to the shafts between the casings.

6. In apparatus of the character set forth, the combination of-'a base having at its ends supporting surfaces the base containing inlet and outlet compartments opening through said surfaces, a pump casing surmounting each surface and having passageways communicating with the compartments of the base, the pump casings having cylindrical chambers that are substantiallyV in axial alinement and into which said passageways open, the ends of each easing heing open, face plates Closing the outer ends of the casing, face plates closing the innei1 o11 adjacent ends of the casing and having bearings thereine shafts joui'naled Within said bearings and concentric with the cylindrical chambeis, crank pins Caiiied by the shafts and piojeoting into the ehznnl'iers Cylindrical pistons journaled upon the crank pins and arranged to traverse the cylindrical Walls OIP the chambers when the shafts are rotated, a iin projecting through the cylindrical Wall of each chamber between the aforesaid passageways, means urging the fins into Contact with the peiipheries of the pistons, and a driving element applied to the inner ends of the shafts.

7. ln apparatus of the character set forth, the Combination oi' a base, pumps mounted upon the base in spaced Arelation to each other) the operating shafts of the pumps approaching each other in axial. alinement` a coupleii assembly connecting the ends oi the opposed shafts, and driving means mounted upon the ooupleiiand serving to maintain the coupler in assembled Condition. v

l'n testimony whereof l hereunto my signature.

TILES S. SHOCKLEY.

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