US1186981A - Fluid-operated tool. - Google Patents

Description

.Patented June 13, 1916.

2 SHEETS-SHEET I.

l L. w. GREVE. FLuIuoPEII/ITED IooL.

` APPLICATION FILED Nov. I4. 19m. 1,186,981.

INVENTOR ATTORNEYS wITNEssEs 2 SHEETS-SHEET 2- Patented June 13, 1916.

L. W. GREVE.

FLUID OPERATED TOOL.

APPucAUoN FILED Nov. 1,4, 19m.

firmayconcermpA A it known"that` `LfLoU/rs YW.; au p Veuf of the Ui'iitelf `tatels, residing AA at eland, in "the 'countyAofCuyahogaAund ofAA ()hilo,`ihave nrentedl certain A new is tulvlinprm'ements inliluid-Uperated ,i )f which;theAfollowingis specifr "nventionArelatesy to fluil operated sand as part cularly rllustratec icihbodilnent fof the invention s illus- .;Lteil inffthei A accoinp nving rawingl grure 1 is a longitudina-l f section through the ool, Fifi lisilan(enlargedlongitudinal uiqthrollglr A the portiouof `theitool" coniiinngithe"Huicludistribution inechfanisln (lislo"L ng the iiialve: and pistonginuoneoperative Sition "iniilaiptolthat shown inlFigJjl, and i Bfiisjalongitudinul section oftliat part l `the tool shoivuiiir Fig 2, Awith fthe {Valve piston showininyfauothen operative porin g] to the gener-alf rraiigement of lsythe valve g which" is` n ising@ and giur which the piston 3 rre-` ates5` 41 `s :utappet` carried by `the tapiiile liloekf' securedto fthe ising 2, V ppet sfleiu'g iulaptedtoffhe intermit` 'llengigeil by the piston,1 G isfthe drill `n`k,ijthe` clirill being shown as `brokenfoff7 is' arl il liyand lguided b'yythelohuek A A l `i'e` or Asliellfvalvel adapted] -to re- 'ate' lougitmlinallyy withinithe Avalve Q y1O`is`a. i'ulve blockluittodailjofuuug 'e block-@intl which" is A hclii "1n place le `casirighi?,` fl A is` the` Qontrol lying fvalve,` fnually operated andil carried "the I buSlllllsecuiedrivithinithe Yalizel" casing' 15.'

feed;roiilpistoucylinder iseoured to.l casingiAjliAandwhich carriesff :14A i adaptedto` fluid pressi-1re`suppliedAtojthe'` [TEDl STATES j' w. ensvnyzor `eLuvlruuuu,011110, Assleuoe crous-nsw To THECLEVELAND `ums/LATI@111001 communionCLEVELAND, @mme comonumou cromo, AND ufmnrfmomusotsvnnirunRooKADsILnCOMPANY, or CLEVELAND, omas A 1 `raraf1normeamn troon.

p resented aune 13,1916.

M Appiaumidnovember 11;, 1914. sei-mno. 872,063,

cham l5, 1G is u feed rod adapted to be actua by the piston 14 and is for `the pur pose feeding the tool to the Work7 ythe feed rod being; adapted to engage solne sort of support opposite the surface `to be drilled, and 17 is a closed hollowT handler for the tool adapted to fari-y a supply of lubricent.

The piston 3 is controlled by the sleeve valve. 8 which is in turn controlled bythe Figs. '2 and 3 the fluid distribution system consists of the manual. control valve 11 through which Huid is fed to the too'l from a suitable, source, entering the tool through the passage :1S and thence int-o the storage reservoir 1.9 through the passagevQO. The lpurpose ot the reservoir 19 is for storing a quantity of air Aunder pressure at a point piston 3. Alteferriug more particularly to adjacent the sleeve valvef so that a constunt and immediate supply 'of fluid under pressi'ue. is availahlethe instant the corr trollingA valve 1s operated. The reservoir also insures a uniform pressure of Huid at 'all tunes during' the operation of the tool. A

The fluidv passes from the reservoir `19 through (the passage :21,wlnch 1s of greater capacit?.7 thauthe passageZO, into an annularirecess 22 in the rear end of thevalve casing-1, and it isy from this recess that all fluid -for operating `the tool 1s supplied.

lVheu the sleeve valve 8 and the piston 3 A`are`in the position shownin Figs.A 1 and A2 the circulationv of Huid is as follows: Fluid Y enters `the passage 23 in the loWerpart of `,the rear enil of the valve. hlook 9 from the annular recess 25 out in the periphery of the sleeve valve S, through the'port 2G inthe `valve block 9 into the passage 27 and thence through the port 28 into the front end of the pistou chaiuberf 29 Where it lots upon the front end of the piston 35 thereby driving the pistou rearward). y

The fluid inthe piston Chamber 2.9 inthe A rearof the piston 3 is exhaustingthrough the` portBO leading to thelpassage 8l, and through the port 32 leading from the cham` ber 29 yto the passage 31. The passage` 31 communicates ivitlran exhaust port 33 which leads from the annular recess 34 out in the valve block' 9 to theannular exhaust passage 35 surroundingf'the valve block and openingV to the atmosphere through the ex# haust passage 36 at the bottom of the valve .throughfthe'passage 36.A

casing 1L Fluid, therefore, exhausts from the passage" 3'1'through port 33, annular' exhaust passage 35, andto the atmosphere rIhesleeve valve 8 is held in the position shown in Figs.y 1 and 2 by means of a con'- stant supply of fluid undenpressure supplied to the annular recess 34 through the port 37 which c'ommunicates with the passage -38 which is constantlybpen to the" annular rrecess 22 in the valve., casing 1. Fluid in the annular recess 34 acts upon the the outside of the sleeve valve 8, over ing` forward annular pressure face or are?) on.

by reason of greater area the pressu e ex erted upon the rearward annular pressure area 40 supplied with fluid through the port 24 and passage 23. The rearward pressure area 41 constantly receives a supply of fluid.

under pressure from the reservoir 19 4through passage 21, annular groove 22, port 42 and port 43. In the rear portion of the valve 8 as shown inFigs. 1 and 2, the pres sure on the rearward pressure area'4l is reduced below thepressure on the pressure area 39 because of the passage 44 in the sleeve valve 8 which leads from the pressure area -41 to theforward end of the sleeve valve and opens into the rear of the piston chamber 29 through the port 45. As the fluid in lthe piston chamber 29 is exhausting behind the piston 3, the pressure on the surface 4l is considerably lower than the pressure/on the pressurearea 39 by reav son of the low pressure in' the passage 44 which is bleeding the fluidv from the pressure area 41. 'lie extreme rear end area 46 of the sleeve valve 1s not receiving any pressure .above"exhaust pressure while thevalve is. in the rearward position, and as the pressure area 41 is of smaller area than the pressure area 39 andi receives less pressure, and as the areaef the pressure area 40 is less than the pressure area 39,.the valve will remain in the rearward position until 'pressure conditions on the various pressure areas are changed.

closes the exhaust port 30, and when the 505 rear end enters the .sleeve 'valve the exhaustn When the' piston 3 moves rearward it. first `port 32 is shut off from the piston chamber, andl the extreme forward pressure area 47 of the sleeve valve 8 is thence subject only to exhaust pressure.' movementof the piston covers the port 45 which port Vestablishes communication between .the piston chamber and the rearward pressure area` 41, and as the fluid through 1 the port 45 can no longer exhaust' the pressure on the pressure area 41.l immediately rises tor that onIthe pressure` area 39, and together with the constant pressure on the rearward pressure area 40 and the pressure onthe extreme rear area 46 overcomes the r`constant pressure.. on the pressure area 39 passage 23 and through the port 43 into the Further -rearward 1 resulting in the shifting of the valve to the forward position as shown in Fig. 3. lVhen the front end of the piston 3 passes the port 30 the pressure in the front end of the piston lchamber is suddenly reduced and aided by the compression of the trapped fluid in the rear end of the chamber the piston is vcushioned'and stopped before it engages the rear end of the chamber.

, Referring to Fig. 3 the circuit of the `fluid from the rservoir 19 when the parts are in the position shown therein is as follows. The fluid enters the annular recess 22 through the passage v21, thence into the extreme rear end of the piston chamber forcing the piston 3 forward. The fluid in front of the piston 3 exhausts to the utmosphere through the portv 28, passage 27, *l

Yexhaust port 49, annular recess 34, exhaust port 33 ``at the top of the valve block. 9, an-

sage 38 was reduced owing to the exhausting 100 of the fluid in the forward end of the piston chamber, therefore reducing the pressure on the forward pressure area 39 which is supplied with fluid through the port 37 leading `from the passage 38. This reduction ofpressure as wellas the reduction of pressure on the extreme forward pressure area 47 on the sleeve valve when the piston 3 entered the sleeve valve .on its rearward stroke, caused the forward shifting of the sleeve valve into position shown in Fig. 3, l therefore when the front end of the piston 3 covers the port 38 upon itsforward stroke and .the rear end ofthe piston moves outof thesleeve valve subjecting the pressure area 47 tothe high pressure in the rear of the'piston 3, the pressures lthus exerted upon the pressure areas 39 and 47, because of their superior area will overcome the pressureexerted upon the rearward pressure areas 41and l46 and the valve will be forced rearwardly. The pressure on the rearward pressure area'40'is reduced because the (luid is exhaustlng through the'exhaust port and therefore offers but little resistance to the rearward movement of the valve.

Briefly, the sleeve valve is shifted forwardly by high pressure exerted on the rearward pressure areas 4l aude() overcoming the high pressure on the forward pressure 139 leo . y recess 22 from whence-'it Carried tothe.,

area 39 and the low 'pressure on the extreme forward pressure area 4:7; The rearward movement of the valve is caused by high pressure' on the extreme. forward pressure 5 area 4 7 and the forward pressure area 39 overcoming low pressure onl therearward pressurearea 40 and high pressure on the rearward pressureareas 41 and 46; A constant supply of fluid is supplied to the `.pressure area 39 tending to `nuove the valve rearwardly anda constant supply of fluid is supplied rtothe rearward pressure area 41 tendingl to move the valve forward, the movement vof 'the valve being controlled by the piston which opens and Ycloses various ports and passages for reducing and. increasmg pressure on other pressure surfaces servl ing to alter. the balance of pressure first on one end of the valve and then on the' $0 other.` The valve 8 controlsthe admission and exhaust tothe piston chamber in such manner as to cause the piston 3 to reciprocate within the piston chamber. Y A

`The sleeve and piston valve are lubricated bymeans of a supply'of oil -inclosed 'within the handle17,- the oil being conducted to the valvethrough theport 50 leading from the ".,han'dle to the controlling valve 11, thence f around the groovel in the peripheryofthe Yvalve 11 through the port 52 into the annular l moving parts. y

. The operation of the 'tool is as follows. The tooll is frirst adjusted to the work ready for drilling and thevalve 11 turned so that fluid may pass from the passage, 18 in the valve through the paagie 20 into the storage reservoir 19. Starti 4 with the parts in the through the passage 21 into the annular groove 22 and thence into the passage 23,

. Athrough port 24 around-the annulargroove.

25 in the valve 11', throughtheport 26, and

passage 27 into the front end of the pistoni chamber 29 through the port 28.-] The piston ballet-passage 36 to the atmosphere When: I thepiston': 3` covers the smal-l port 45in the i. interiorfofthe valve 8v, the increased vprefure" Mcaused thereby on the pressure area 41 causes the "valveto move forward to the` osition shownin Fig.f3. 'The forward shi ting of thejvalve closes the port 24 and opens the-"a porti@ leading to the rear end of the pistonfv I0 chamber, thereby permitting the entrance of the fluid to-therear end of the piston chamber which forces the piston 3 forward to strikethe tappete a sharp blow which in` turn imparts the` blow the drill tool 6.

o l The forward' shifting ofthe valve opens the' position shown, in Fig. 2, the fluid `passes 'y the cylinder and a lishing communicatlon between the oppocf f;-

- the cylinder adapted to be closed'by the is# 3 is forced rearward bythe fluid thus enter-5 ing thechamber, and the fluid in the rear end olV the piston chamber is exhausting through the ports 30 and 32 into the exhaust passage 'j :31v 'and thence through the'port 33, the annue. lar "passage 35 and finally 'through the ex'- Y having a` piston Iadapted to reciprocatev ying the inlet with.theinterwrgofjth y. lm; v to one-endg lle-` 'port 49 leading from the passage 27, which allows the fluid in the front end of the piston chamber to exhaust through the port 28, passage 27, port 49, around annular recess 34, exhaust port 33, annular passage 35 andl exhaust passage 36.

When the piston 3 moves forward suiii cientdistance to cover-the port 38', the inn crease or" pressure in the passage 38 -communicating with the pressure area 39 by means of the port 37, together with the piston chamber pressureexerted upon' the pressureA area 47, causes the valve to be shifted rearwardly tothe starting position as shown in Figs. 1 and 2. The rearward shifting of the valve again causes the piston to move rearward and the cycle of movements is con tinued, as long as fluid. is'supp'lied to thew reservoir 19. p

The 'rapid andintermittent impact of the piston 3 upon the tappet causes the drill to gradually bore a hole in .therock or other substance to be drilled. l

It is obvious. that certa-in'y modifications seV trolling the piston linto which lthe piston is moved, provided with apressure surface, means for supplying a constantesupply of fluid to such surface to hold the valve in one i operative position, an 'oppositely disposed "pressure 'surface on thevalve having greater area than the first pressure area, 1neans for supplying a constant .suppl of'pressure to the oppositely disposed sur ace, an exhaust passage communicating with the interidrfof ort inY the valve estaba `sitely 'disposedl surface and the interior ton when the pistonentersthe valve.5

.in combination in-a fluid operated'teol,

in. Ja cylinder, a .sleeve distributing vai controlling thepiston, a `fluid supply controlled by the' valve, a assagegf port controlled bythe ,valvefor yexija'listin .Huid rom'the same end of the cylinder-"ang, an annular groove surrounding-fthe valve? unece: I

m thesaurus.. Iinderganexhaustif;

tor.establishingl communicationbetween thai. l.

'saidports when they are'uiicovered byjlilie sleeve valve. l

3.1;f-In combination in a operatedft'ool `huvlng a piston ladapted .to reciprocatefwithiin a' cylinder, a distributing valve forconies trolling theiuid for operating the piston, 18e' a fluid supply inlet, a fiuid supply lpassage connecting the inlet with the interior of the' cylinder, an outlet port in the fluid suptributing valve, and an annulargroove sur-A roundmg the valve for connectlng the sald ports when thefvalve is moved to open the ports.

4. -In combinationin a fluid operated tool having a piston adapted to reciprocate withvalve, an

in a cylinder, a distributing vvalve for controlling the'fluid foroperating the piston, a

iuid supply inlet, a fluid supply passage connecting the inlet with the interior of` onel end of the cylinder, anoutlet port inthe fluid supply passage intermediate the supply inlet andthe cylinder controlled by the texhaust port controlled by the valve substantially in the same plane with the outlet port for exhausting fluid from the same end of the cylinder and adapted to be closed by the distributing valve, and an annular groove surrounding the valve for connecting thezjsaid ports when the valve is moved'to open the ports.

5. In combination in a fiuid operated tool having al piston adapted to reciprocate'withed to A stantly supplying fluid pressure to'thesaid pressure4 areas, an exhaust passage commuln a cylinder, a sleeve valve l`for controlling the plston posed differential pressure areas, 'and adaptreceive the piston, means for connlcating with the-cylinder, and a port in I the vave'estabh'shing communication bet'ween the pressure area, of greater area and the interior of Ithe cylinder adapted vto be closed by the ,piston to prevent the escape of fluid from the pressure area of greater area into the cylmderuhen the port is closed.

ln comblnatlon in` a fluid operated 'with admission provided with oppositely dis-' tool having a piston adapted to reciprocate within the cylinder, a fluid chamber, a distributing valve for controlling the movement of the piston adapted to reciprocate within a valve.` chan'iber, an annular groove in the valve chamber .surrounding the dis- .tributing valve, an annular enlargement upon the valve adapted to operate in the groove, a fluid supply passage leading from the fluid supply to the piston cylinder and communicating With the annular groovev 'through a port adapted to beclosed by the annular enlargement of the valve When the valve 17s 1n one 1 operative. positlon, an' exhaust passage leading from the annular groove adapted to be closed by the annular enlargement of the valve when the valve is in position to close the said port, and means on the valve for closing the supply 'passage betvreen'the fluid supply'and the piston cyl-- inder when the valve is'move'd to"uneover the said port and the said exhaust passage to establish communication therebetween.

y7. In combination in `a fluid operated tool, a casing, a piston-chamber provided side Walls, a Ashe valve at the end of the chamber through which fluid from the ad-l a pis mission ports passes to the chamber, ton working through the chamber and lthrough ,the shell valve, a feed cylinder and piston', in alinement with the piston cham-A ber but spaced awayI therefrom, and a storage reservoir located in the spacebetween 'the ends ofthe piston chamber and:4 feed cylinder, such reservoir being suppliedA with fliud under pressure and communicating with the said ports.

In testimony whereof I have hereunto signed my name in vthe presence ofthe two subscribed Witnesses.

Louis W. GREVE. i Witnessesr- ,Y GEO. H. HALL,

J. DE Moor,

Borte leading through its

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