US2457930A - Fluid pressure operated device for inserting cushion pads - Google Patents

Description

Jan. 4, 1949. H A 'sMlTH 2,457,930

FLUID PREss'UR OPERATED DEVICE FOR INSERTING CUSHION PADS Filed July 17, 1944 2 Sheets-sheet 1 lJem. 4, 1949. H. A. SMITH 2,457,930 v FLUID PRESSURE OPERTED DEVICE FOR INSERTING CUSHION PADS Filed July 17, 1944 2 sheets-sheet 2 Patented Jan. 4, 1949 UNlTEosTATEs PATENT OFFICE FLUID PRESSURE OPERATEDDEVICE FOR INSERTIN G CUSHIONPADS Herbert A. Smith,`Pasadena, Calif., assignorto Consolidated Vultee Aircraft Corporation, San Diego, Calif., a corporation of Delaware Application July 17, 1944, Serial No. 545,376 l 4 claims. (c1. 2li-feas) n l The present invention relates generally to fluid pressure operated `devices for inserting articles into apertures in parts of aircraft, automobiles,

lrailway cars, refrigerators, stoves and similar products, More particularly the invention relates to that type of inserting device which is in the nature of a hand tool andcomprises (1) a cylinder with end` closures; (2) a piston which is mounted in the cylinder to slide back and forth between the end `closures and embodies a rod extending slidably through'a hole in the closure at one end of th-e `cylinder and having a ram type head at its outer end; (3) valve controlled means for introducing fluid under pressure into `the other end of the cylinder in. order to cause the piston to slide in such directions as to move the ram type head outwards; and (4) spring means for retracting the piston after sliding thereof in response to introduction of fluid ,under pressure into said other end of the cylinder.

One object of the invention is to provide a fluid pressure operated inserting device of this type which is primarily adapted to insert into an apertured part a tapered resilient, cushion pad having a comparatively deep continuous groove immediately inwards of its `large end, and operates, when the ram type head ofthe piston rod is placed against the large end of the pad and fluid under pressure is introduced `into the `cylinder by way of the valve controlled means, to force and extrude the small endof the pad through the aperture in the part tothe end that the aperture defining portion of the part is brought into seated relation with the pad groove;

Another objectof the invention is to" provide a cushion pad inserting device of the last men'- tioned character whicheffectively and eiiiciently fulfills its intended purpose and is so designed and constructed that it does not injure or in any way distort the apertured part' into which the cushion pad is inserted into place in connection with use of the device.

Another object of the invention is to provide a fluid pressure operated cushion pad inserting device of the type and character under consideration which comprises in addition to the cylinder, piston and other parts* heretofore mentioned,a nozzle which is positionedconcentrically or in axial alignment with the cylinder end closure having the hole 1 for the piston rod, is held in spaced apart Aand'xed relation with such end closure by way of la sleeve and is adapted in connectionwith a cushion pad inserting operation to havelthersmalllend of-the =pad extruded therethrough bythe ram typeuhead on the outer end t t 2 of the rod in order so to compress the small end of the pad that it is readily forced by the head through the aperture in the part.

Another object of the invention is to provide a cushion pad inserting device of the last mentioned -character in which the sleeve is provided with a side opening whereby the cushion pad may be inserted into place between the nozzle and the hole equipped end closure of the cylinder preliminary or preparatory to a pad inserting operation.

A further object of the invention is to provide a fluid pressure operated cushion pad inserting device of the type and character under consideration which includes novel piston actuated means for shifting the nozzle and cylinder away from the apertured part after insertion of the pad into the aperture by the ram type head on the outer end of the piston rod.

A still further object of the invention is to provide a pad inserting device which isgenerally of new and improved construction, and not only is of such light weight that it may be used without tiring or fatiguing the user, but also is so designed and constructed that it may be produced at a comi paratively low cost.

Other objects of the invention and the various advantages and characteristics of the present cushion pad inserting device will be apparent from a consideration of the following detailed description.

'I'he invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the con clusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

` Figure 1 is a perspective view ofa device embodying the invention; f

Figure 2 is a perspective view of a tapered groove equipped cushion pad of the type that is adapted to be inserted intonplace by the device;

Figure 3 is a front view of the device illustrating in detail the construction and design of the nozzle that is connected to the hole equipped end closure of the cylinder by way of the sleeve having the side opening through which the pad is insertedpreparatory to a pad inserting operation;

Figure 4 is a longitudinal section of the device showing theV piston in its retracted position and the pad disposed betweenthe nozzle and the hole equipped end closure of the cylinder and in readi- '3 ness to have the large end thereof engaged by the ram type head on the outer end of the piston rod;

Figure 5 is a longitudinal section showing the piston after it has been forced part way towards the hole equipped end closure into a position 5 wherein the ram type head on the outer end of the rodaei'ectstpartialllextrusion of the small, end of tlepadthrough the nozzle andthe apere ture in the part;

Figure 6 is a longitudinal section showing such"- further movement on the partici thefpistonthat the ram type head effects additionalfextrusionof the small end of the padthrough the.nozzle and the aperture in the part; and l Figures 7 and 8 are longitudinal sections-illus: trating in detail the manner in which the nozzle and cylinder are shifted by the retracting.tmeansfv away from the part after the small end, of the pad has been inserted fully through the aperture in the part and the aperture defining portion of the-part `is in seated1relatiorrwitlrtheJ groove that f isA directly inwards off-ith'eelarge 'end of the pad.

The fluid pressure operated device/"whichisH shown' intheL drawingsconstitutesv the preferred formV or' embodiment i oftheiinvention'; ItfA is l'primarilyf designed or` adapted" to insert a cushion'l padlith-roughfan aperture III'in apartl II and as -itsfV principal f ormain components' comprises a cy-lifnderfl2l apiston-l3; af-piston rod I4; a nozzle andai-retractor I6.

The cushion pad 9 is formed of rubber or-eotherv' resilient material 'ande as sl'i-owninliigure-` 2,Ais circular' in cross -seeti-on and 'tapered-s Anannular groove Ilifisf-'frmedin the pad' directlyA inwards ofith'elatterslarge'end This groove hasstraight 3 parallel-'sides andf-fresul-tsinthef small i'and'llargeendsL-of f the pad yb'eirrgspacecl'- apartf and joined i togetherl byfa reduced stem-likepart-v I8? The hole I in the part II is circular and fs/substane tial-ly the same-in fdiameterea'sltlieestemelike part 4o Ioff-theepad. After 'thepad-is-inserted into place by thedevice'as hereinafter described; the-aperture deiiningf portionv of the partf'll `is-fin seated; relation with 'l thej groove I FI f" in the padj and? theu small and llargeendsl offthefpadl areu arranged in 45' straddled relation with said aperture de-n'inge por-tion-asfshown inFigure 'I'lie=partA II having the aperture I 0Jv may-1 be-aklpa-rtfof fani airplane; or f other structure=tofv which a' panel (not`- shown) -f is removablyfor otherwise securedi 'IhelargeL end-1 50 of the pad, when the pad is in place, serves asaL cushioning medium between-the-- part I'I'i and-"the panel;` Y

cular side wall I 9 and has a closure 2'flffatfits-front-- 55` end and laf closure 2\|.:;at its-rear another end The inner periphery off the cylinder-'side wallv IBf' is Aof i uniform b'oreor dia-meterrrom' endtov` end* and f formsa slidewayrfrl thepistonv |32 The.closure.;AY

21T-'at the." frontend ofthe cylinder is of composite 30` character and comprises a ringshapedouter: parti'` 2-2andva vtubular:inner-fpart255i The outer.y part isi disposed iforr the= most part in'y ther frontend off; thef circular sidelwallil I9;- ofi the cylinder and`0 is removably secured` thereto by way of: a'. screw 65 thread' connection-2IL.V The'fouter 'end .of fthe outerY part 2 2 f isf provided 1 with v an outwardly extendingi flanged andfthisds adaptedwhenthe endcl-osure 20 is' in place` to lap Ithe adiacenti end'edgeloffthef.

cylinder 'sidewall ISI and has=diametricallyfoppo'. 70.

site flats 26 whereby it may be gripped withal wrenchorf other*turningtool/Lin: connection' with attachment'v orsremoval of". the frngishapedfoutere: part 2lwithzrespect to @the cylinder;V Inaaddition:

to 'theialangel'ethea outers part.- 22f;of the endzclorA 75:-

4 sure is provided with an integral outwardly extending sleeve 2'I. The latter is arranged in coaxial relation with the ring shaped part 22 of the end closure and has its inner periphery the same in diameter as the inner periphery of the part 22. The inner end-of the tubular inner part 23 of -the fcylinder end 'closure 20fts snugly within theinnerperipheryof the outer part 22 and is keyed or otherwise xedly secured to said outer part, The outer end of the inner part 23 of the'fcyli'nderf.endfclosure 2IJ is disposed within the-1. inner: end of the sleeve 2I and terminates anappvreciable distance inwards of the outer end of the sleeve.,` Thetinner periphery of the tubular 'inner part 23is icircular in cross section and deiines a bore 28which extends between and through theiaen'dsof the tubular inner part 23 of the end closure 20. The closure 2| Iat; the rear end'ofthe cylinder I2 extends across, is formed integrally with, lthe rear-fend of the circular side wall |91" and? embodiesfa centrally' disposed rearwardl'yiprojecting tubular` nipple-29E A hose3'II-i` whichfisconnectedtovasourcefot 'air `underl presf sure-f (not vshown) .I is connected to thenipp1ef29'i byaecoupling1 35i 'and serves ltointrod-uce air under: pressure` into-the `rea-rl `r end of the cylinder I 2f unv der control'of" a1- plunger` typefvalve 32:' Such valve extends 1 transversely of the' cylinderiand-is f mounted for: longitudinali sliding movement in` a-n fopen ended `rldore'- 333m :the cylinder end closure 22I3 `Itisfzh'eld againstrotationzby-- any-1- suitable1` means, such as .-azkeyeandi keyway (noti shown) i; Theucentralportion'zof the valve.Y 3:2?is provided with awcross port" 3l and'thissis adapted 'whenfr the valve? is: shiftedy inwardsf to: registep with, and?l effect communication:l between; alpairf off. aligned ports. 352'and, 36 in the' centralportion .'ofthe endl closure 2 I: 'Theporti;- 35 leadsarearwards-k from thefrear; central portion offthebores33C-and ."comm-unicates with th'esinnerisen-diof?the/tubular nippletr29: Theiothenport; i: er; the :port` 35; leads forwardsafrom. the,l inner4 centralv portiontof the?. bore: 33'; and: communicates with;l the reary end of f ther interior ofithez-cylin'derf4 I2: When theva'lver- 32'; is shiited inwards-,so as: to cause the: crossv port 3.4it to reg-isteryfwith therports-f 35?. andi 361 air l underpressure .is admitted into the reary endiof.vthea-cylinder: Whentheplungerf type valve.32, is s shifted:outwardssoasztovbring,` the cross port: out-lof .registryswitlritheeportstf'3`5 :and3l5the4 supl plys'of Fair. underlpressureffinto .ithe rear.` endf'of the cylinderrceasess, The plungeri type valve V32.:iis= adaptedytoibeshiftediinwardsfintol'its': open posi? tion by way of a handsleverfSiI; andds urgedzoutf'- wards-fintov itsl closed; positiorrsbyfway. of a; compressionzspring 3 8. .t Theihandulever;3Ifis1disposed: directlmputwards aofi ,an-diinzpara'llel:relationwith. the :circular-sidewall; I Stoffthefcylnder z' I 2. t The?A fro-nt f end; of;- the` levert: issdis'posed between-ga. pair; off laterally spaced outwardly extending lugs 3,9? onnthesfront endfofthesidezwallgI 9 and uis'pivotal-` ly supported by way of a pini- 40 which: extends: through alignedholes -Lirr thel lugsrandi said front end offithefhandpleveryV Thefrear.` end: offtheilever:` abuts against :the outer: end of; the plunger rtypef valve-y 32;Y When: theeleven 3;'I1 is gripped.; by the? usern of.r ther; devicef,andswungfv inwardsithe valve f 32,2 is :slidinto;;.-its open positionL as shown. inigFigf uresfio tcl8; inclusiv-ei, Wheny tl'ie-;leverA is.y reiL leasedzafterY as cushion pad .insertingf` operation; theifvalveiis'slid outwards into itsu closed posi-tion in' respo'nselto the action of 'the compressi-on spring# 33t Thef-front1endioftlieeleverl islprovidedi` withra forwardly Iand inwardlyextending` exten sion Hi andethis,= im connection; with release;Y o=` :andasse end of the spring is in abutment with a plug 43 which has `a centrally disposed longitudinally extending open ended duct 44 and is connected:

tothe end closure 2| of thecylinder` by a screw thread connection 45. Theinner end of the valve 32 is provided `with an inwardly extending vent port 46 and this leads from the inner end of the socliet 42 and is so arranged that it `,registers with the port `35 whenthe valve is intits closed position. When the valve is in its closed position the air under `pressure in the `rear end of the cylinder I2 is permitted to escape to at-A mosphere via the port 36, the vent port 46, the

socket 42 and the duct 44. As heretofore pointed out, the spring 38 serves to urge thevalve 32 into its closed position. When it is desired to use the device the hand lever `3l is swung inwards in order to shift the valve inwards and effect opening thereof. As soon as thetvalve tion air underpressure enterslthe rear endof the cylinder I2 and forces the piston I3 forwards.

When, after a cushion pad inserting operation,`

the lever 31 is released by the user of the device the spring `38 shifts the valve `32 into its closed` position wherein the supplyof air under pressure is cut olf and the to the rear end of the cylinder rear end df the cylinder is vented. j

.The piston I3 is mounted in the cylinder I9; to slide backand forth between the end closures 20 and 2l. It comprises a pair of spaced apart discs 4"I and a cup-shapedfmember48 between the two discs. The side wall of the cup-shaped member projects in the direction of the end clo-I sure 2| and isin slidingengagement with the inner periphery of the cylinder side iwall` I9. Whenthe valve 32 is lshiftedinto its open position so as to effect admission of air underpressure into the rear end of the cylinder I2 the piston I3 is shifted forwards in the direction of the cylinder end closure 20. `Acompression spring 49 serves to retract the piston. As soon'asfthe plunger type valve 32 is shifted into its closed position venting of the rearend of `the cylinder resultantly` takes place. The springv 49'is interposed ;between the cylinder end: closure 2l] and thepiston. The front end of the spring is dis-A posed in an annular groove `5Il in the inner end of the tubular inner part 23 ofthe end closure 20. The rear end' of the spring abuts against `the disc 47 that is nearer said end closure 29. As

shown in Figure 1, the front end of the cylinder" I2 is vented by way of a vent duct 5I which is formed in,`and extends through, the ring shaped outer part 22 of the front end closure 20. t

The piston rod I4 is for the most part surrounded by the cylinder I2 and extends forwards from thecentral portion ofthe piston I 3. The rear end of the rod is provided with a reduced stem 52 which extends through aligned holes in the central portions of the discs `4'I and the cup shaped member 48 of the piston and embodies at its outer extremity a clamp nut 53 whereby the rear end of the rod is held in nxedor rigid relationjwith the piston. The front end `of the piston Vrod is slidably mounted in the bore 28 in the tubular inner part 23 of the frontend closure 20jand is. in its open4 posithe large end of the cushion pad 9 and operates in response to forward shift of the piston and rod to effectinsertion of the pad through the aperture I 0.v in: the part II. As shown'in the drawings,` the front endof the ram type head isvflat landt the side portion is rearwardly taperedvand ofsmaterially less diameter than the large end fof the pad 9. When the piston I3 is in its retractedfposition, as shown4 in Figurejl,`

the stem 54fand the ram typehead 55 are disposed in the central portion of the bore 28. When the piston is shiftedforwards to a point adjacent the centraltiportion `of thewcylinder the head 55 is positioned outwards of the front end of the tubularinner part 23 of the front end closure 20 and within `the inner end ofthe nozzle I5, as shown in Figure 5, `Further forward movement onthe part; of the Vpiston results in the head 55 being shifted to a point where it is disposed adjacent the outer end of the nozzle (see Figure 6).

The nozzle `I5 is located in the `outer end of thesleeve 2l and is connected thereto by a screw thread connection 56. Itihas a forwardly tapered outer end and a forwardly tapered axially disposed orice 5'I` Iand is arranged in concentric relation with the ram type head 55. The front extremity of thenozzle I5 hassubstantially the same diameter as the aperture I0 in the part II andembodies diametrically opposite iiats at the of "the cylinder `I2.` ,'.fhe central and front Dortions of the orifice. 5'Iy are .of less diameter than the large/endend the central portion of the cushion-pad withthe result that when the cushion pad, isextruded through the nozzle 4by the ram type head 55, as hereinafter described, the small end of the pad is compressed for passage through the aperture IU in the part II and the large end is doubled back or folded around the head 55, as shown in Figures 6 and 7. The sleeve 2'I is provided with a` side opening 58 for permitting the pad to be inserted into a position wherein it is disposed between the nozzle and the front end of the tubular inner part 23 of the front end closiire.20.` Itis contemplated that the pad, preliminary to insertion through the aperture IIJ in the part II, `will bevinserted into the sleeve 2'I via thesdeopening `53 and positioned so that the small end thereof projects in the direction of 'thehozzle `After insertion of the cushion pad into placejthe front end of the nozzle is placed against the-part II` in centeredrelation with the is held at right angles to the part I I the plunger type valve 32 is held at right angles to the part I I, the plunger type valve :32 is shifted to its` open position "by swinging inwards the hand lever 3I.` As soon as the valve is opened the piston is shifted forwards in response to the introduction of air under pressure .into the rear end of the cylinder I2 withthe result that the ram type head 55 movesinto abutment with the large end of the cushionpad and then forces the pad through the nozzle until the `aperture defining portion of the partwll` isfinl seated relation with the annular groove; l1.:` l 'At such point. furthersforwardimoveei mentzof the` head: ceases,aszhereinafter'descrbedg', andthel large endof thelpad is foldedfaround. the; head 5.5 asshown inzFigurei'Z..

Theretractor IBfispiStQmoperated and serves automatically after the pad is inserted through. the, part Il untilrthe aperturey dening: portion of the part is inseated relationwiththegroove, to effect retraction of they cylinder and nozzle to theendV thatthe folded large endl-of' thelp'ad` snapsinto itsnormal flat position and hence it isMbrought-into abutment' withv the-part H1; As show-n. in the drawings; the retractor comprises avl tubular member 59 whichV surrounds, andA is longitudinally slidable with lrespect to,v the=sleeve 21 I-t also comprises a pair of laterally spacedi rods 69- Which are arranged in'parallel'- relation with the piston rod I4 andY have the front-ends thereof WeldedA to the rear portion of the-tubular member 59; As shown in Figure `15 said-member 59 is` provided with a side" opening 6I= Which-is in registry with the side opening 58111' the sleeve 21andpermitsthe cushionpad 9 to-be-inserted into place between the nozzle and the frontend of the tubular inner part 23- of the front end closure 2U vpreliminary toinsertion throughthe aperture I9 in the part Il. The central portionsof the rods 60 extend through, andare slidablymounted in, bores 62 in the ring shaped* outer part 22Y of the front end'closure 20. The rear exjt'rernitiesof the rods 6D project'rearwards'beyond' the rearI end of` said ring shapedouter' partand: are surrounded by helical compression springs63l which serve to urge the rods 60" and the *tubularF member 59 rearward'sV with respect to' the cylinder. The front ends ofthe springs abut against" the rear end of the; rin-g shaped outerpart 22' ofthe front-end closure 29 andthe rear. ends off the springs abut against Washers 54'.' which are secured on the rear extremities. ofthe rod`s60' by pins. The rods are positioned in' the path off the piston l`3 and are adapted" to be shifted, thereby directly before thev piston" reaches, theA endof its'l forward stroke. Whenrthe piston. is in its retracted position the springs |5`3`Y operate through the medium of the rods 50 to hold the inner end ofthe tubular member` 59' inabutment' with the front end of the ring shapedonteipart; 22 of the frontend closureA 20',`as shownin Fig:- ures 4, 5 and 6. The length of' the` member 59 is such that when the rear; end' thereofl is1ir'1A abutmentiwith the front end ofethez outer part ofthe front end closureV its frontlendis spacedj slightlyY rearwards of4 the front vend of; the nozzle' I5; The rods 60 are of such lengththat the rear,

ends thereof are engagedV by the piston directly. before the ram type head" 55 causes' the small end of the cushion pad 9 to be fully projected', through the aperture I`'in the part I'I. In connection with operation ofthe device, the piston directly before it reaches the endcf its for.- Ward stroke, engages the rear extremities offthe. rods 50, as shown in Figure 6'. Further forwardimovement on the part. of the piston results iny the rods xbeing shifted forwards, relativelyl to.y

the cylinder, thus causing the front endA of." the.

tubular member 59 of; the retractor I'B to,` bel brought into engagement with the. adjacent por-y tion of the part Il, and also causing the headli'` to force the small endl of`v the cushion .pad-.com-

pletely through the aperture, I0 i'rrthefpartl` il.,

As soon as the front end'of the tubular member. 59A ofthe retractor is brought into, engagernerit with the adjacent portion of' the part Il .the cylinder and nozzle, due to the pressure of the air' fil 8 in: the 1 rear :endl ofi: the7 cylinder, arel forcedf'rear"-` wards: as shown in Figure 8. Inv connection with thee rearward shift ofthe nozzle the large.` end of theY cushionipadiis-lreleasedffrom the nozzle and expandsffromlits-folded position around the head into its-tnormaliposition. t When the plunger type valve 32T iscIOSed-Pby release'` of the hand .lever 3=`Il`fafterf a pad inserting operation thepiston isretractedfby:the-compression spring 49 and the compression-springs 6'3fserve, through the medium offtherods 50; to retract the tubular. member 59 of the retractorA l'6'- into its inoperative position wherein the rear end thereof abuts against the front end" of' the ringv shaped' outer part 2v2' of the-front endl closure 20.

When-vit is desir-edI` to use the device the pad 9* ils-inserted into the sleeve 21 via the side openings ini` the sleeve and" the'tubular member 59 While positioned sothat the small end thereof faces inV the` direction of the-nozzle I5. Thereafter the device isl manipula-ted so as to` bring' ther frontendV ofy the nozzle into centeredv relation with the aperture# defining`r portion of the part, ll. As; soon asthe device isso manipulated the operator` f depresses-orvv swings inwards' the hand leverY 31y soas'to/eff'ect'shift of the plunger type valve 32 intov its open position wherein the vcross port 34 thereof is in` registry with the, ports 35 and 36. Assoon as the valve is in its: open'position'air.

3o'. undergpressurej entersl the rearV end of the cylinder and causes the piston and pistonfrod to; move forwards relativelyto thel cylinder; During forward movement of the plston'the ram type` head-"551l on the front extremity'ofl the" reduced 1 stem 54 of the pistonrod" moves into abutment withW the centralportionof` the largerend of the cushion pad`andforces the pad'V towards the nozzle. As'shown4 inFigurel 5, the head, before the' piston is brought' into engagementl with the rear extremities'of the rods Ell-'of the retractor, forcesy the smallend ofl the pad through the front end of'vl the nozzle andf theilatter operates to compress; the small end of the pad"` so that it is shiftable' through the aperture I0^in the partl Il in conznection with continued movement of the head;

` When the pistonisbrought into engagement with.

therearextremities oftherods lllthe head 55, asy heretofore lpointed out and as shownl in Figure 6` reaches a', position wherein it; has effected substantia-ilyi complete" insertion ofthe small end of the'l pad' throughthe aperture I0. In connection with further forward shift of the piston thehead 55'` effectspcomplete insertion'of'the small end ofthe. A pad 9" through the aperture IOT and the tubular member 59 of theretractor is broughtinto abutmentwith the adjacent portion. ofthe part JH., After the front' end' ofthe tubular member 59` has been broughtinto abutment with the adjac- V ent portion yof.' the part Itmovement of the pis-- tonrand head" withrespect tothe part Il is ar-` rested andthe air. under pressurel in the rear end"` of theV cylinder operates, as. hereinbefore. pointed out,to shift the cylinder and nozzle away from thepartlll As the nozzle shiftsawayv from said part l Lthelarge end of the pad which, prior to raising ofthe headwithrespectto. the part Il, is caused'by, the nozzle to assume a folded position around. thehead; is` released ,fromthe nozzle andY snapsontward'sinto lappedlrelation with the part. I'l. As` soonasf.the ,pad isinsertedinto place with. respect tothe.part H. the deviceis withdrawn and the valve,32; is, causedto slide into .Y its closed position by release of, the handlever 31. As soonr w asthe valve isshifted' into its closed position in` response to the action of the compression spring sa the rear end of the cylinder is vented with the 'result that the piston I3 isretracted by the spring 49 and the springs 63 operate to retract the tubular member 59 of the retractor against `the `frontend of the ring shaped outer part 2.2 of the frontend closure 20. r f

The herein described 'pad inserting device effectively and eiciently fullls its intended purpose and is automatic in operation, although under manual control. It is essentially simple-in design and construction and hence may be produced at a comparatively low cost.` By constructing the various parts of the device of aluminum or other metal that is light in weight the weight of the devic`e as` a whole may be so reduced that the device does not in use tire or fatigue the user. Due

to the arrangement and construction of the parts the4 device does not in connection with use there- `of in any way injure or distort "the part intowhich the cushion pad is inserted. If the cushion pad is formed of rubber or like resilientmaterial `it is contemplated that it will be` lubricated before it is positioned in the sleeve 21 in order to facilitate insertion thereof into the apertured part of the device.

Whereas the device has been described as being primarily adapted to insert a tapered and grooved equipped cushion pad like that shown in the drawings it is to beunderstood that it may be used to insert other forms or types of articles into apertured parts. It is also tobe understood that the invention is not to be restricted to the details set forthl since-these may bernodiiied withinthe scope of the `appended claims without departing from the spirit and scope-of the invention? Havingthus describedthe` invention what I claim as new and` desire to secure by Letters Patentis:`f l l i c l. A portable device adapted!` to insert an` oversized resilient cushionpad` or like article into an aperture in `a structural part and comprising a cylinderwith end closures, a nozzle connected xedly to, and; extendingqlengthwise of, the cylinder, disposed outwards of one of the end closures so as to define therebetween 'a pad `receiving space;

adapted to have the `outer end thereof placed against the aperture defining portion of the structural part, and having a centrally disposed orice the outer end of which is approximately the same in size as the aperture, a piston mounted in the cylinder to slide back and forth between the end closures, valve controlled means for introducing fluid under pressure into the end of the cylinder having the other endclosure in order to force the piston towards said one end closure, a piston rod having one end thereof connected to the piston and its other end extending slidably through said one end closure and provided with a ram of less width than the orifice in the nozzle positioned in centered relation with said orifice and shaped and arranged so that after insertion of the pad into said space and placement of the outer end of the nozzle against said aperture dening portion of the part and in response to shift of the piston toward said one end closure and relatively to the cylinder, it operates to extrude the pad part way through the nozzle and into the aperture, and automatic piston actuated means whereby when the rod is slid by the piston to a position wherein the ram is disposed adjacent the outer end of the nozzle the piston, rod and ram are arrested and the nozzle and cylinder are caused to be shifted away from the structural part in order to extrude the remainder of the pad from said nozzle.

2; A` portable device adapted toinsert an oversized resilient cushion pad or`1ike articleinto an aperture ina structural part and Vcomprising a cylinder withendclosures, a nozzle connected flxedly `to,` and extending `lengthwise of, the cylinder,ydispo`sed outwards of one ofthe end c10- sures so as to define therebetween a pad receiving space, adapted `to havethe outer end thereof placed against the aperture defining portion of the 'structural part, and having a centrally disposed outwardly tapered oricethe outer end of which is approximately the same in size asthe aperture; a piston mounted in the cylinder to slide back and forthbetween the end closures, valve controlled means for introducing fluid under pressure into the end of the cylinder having the otherend closure in order to force the piston tor- `wardssaid one end closure, spring means inV the cylinder for retracting the piston upon closing of thevalve of said valve controlled means,`a pis# ton rod having one end thereof connected tothe piston and its other end extending 'slidably through said one end closure and provided `with a ram of less width than the small endofthe orifice in the nozzle,` positioned in centered relation with said orice andshapedfandarranged so that afterinsertion of the padinto said space and placement of the outer end ofthe nozzle against said aperture defining "portion of the part and in response to shift of the piston toward said one end closure and relatively to the cylinder, it operates to extrude the pad part way through` the nozzlel and `into the aperture; and automatic means whereby when the rodis slid to a position wherein the ram is disposed adjacent the` outer end of the nozzle the piston, rod and ram are arrested and the nozzle and cylinder are-caused to` be shifted away from the partin order to extrude the remainderlof the'pad4 from the nozzle, including a rod arranged in parallel relationjwith the cylinder, jhaving thecentralportion thereof extending slidably through said one end closure and its inner end positioned in the path of the "piston, and adapted during shift of the piston toward said oneend `closure^to be shifted by the piston outwardsA into"abutm`ent with said part, and spring means for retracting the last mentioned rod when the piston is retracted by said rst mentioned spring means.

3. A portable device adapted to insert an oversized resilient cushion pad or like article into an aperture in a structural part and comprising a cylinder with end closures, a nozzle connected xedly to, and extending lengthwise of, the cylinder, disposed outwards of one of the end closures so as to dene therebetween a pad receiving space, adapted to have the outer end thereof placed against the aperture defining portion of the part, and having a centrally disposed outwardly tapered orifice the outer end of which is approximately the same in size as the aperture, a piston mounted in the cylinder to slide back and forth between the end closures, valve controlled means for introducing fluid under pressure into the end of the cylinder having the other end closure in order to force the piston towards said one end closure, spring means in the cylinder for retracting the piston upon closing of the valve of said controlled valve means, a piston rod having one end thereof connected to the piston and its other end extending slidably through said one end closure and provided with a ram of less width than the small end of the orice in the nozzle, positioned in centered relation with said orifice and shaped and arranged so that after inafwas@ sertionF of. the. pad. into. saidpace. andplacement of theouter. endo'rtl'ie'nozzle,against'said aperand. Vslidalole. longitudinally relatively 1-to, the

nozzle,.,and. a. rnd. disposed in parallel relation with. thecylinder4 and having. its central portion extending 'slidably4 through said, one end. closure, fits. outer. end connectedtdthetubular member and its. .inner end. positioned inthe path. ofi -tl-ie y piston, and adapted.inconnectionvvith shift Voi the. piston .toward saidione end closure. to beA en:- gagedand shifted .by the piston, and spring .means for retractingthe last mentionedrodand tubular member. during. retractionofL the. piston by." said 'rst. mentioned. spring means.v

4.` A@ portable deviceeadapted, to ,insert .anovervsizedresilient cushionpad or l-ikearticle intoan aperture` inta structural partL and comprisinga cylinder with endl closures; a cylindrical sleeve disposed in coaxial. relationv With the cylinder, connected xedly.- to and4 projecting.-y outwards rom,.-oneof. the endclosures, and-provided with a side opening1whereby thepadfmay -beinserted into it, a nozzle connectedftothe outer end of the sleeve, adaptedto have -thefouter end thereof placed-.against the aperture;4 dening portion of theve-partaandy having,- a centrallydisposed outwardly taperedpricei the outer end-of, which is. approximately. the same: in size; as'. the aperturey a. piston. mounted. in the'. cylinder to:y slide` back and`r forthf between-f. theend closures, valvecontrolled-means `for introducing iiuid under pressure-finto theendof. the .cylinder having Tthe ,other end closure in order. to force the piston. towards saidnef end closure, .afpistonfrod having@- onefend .12 thereoi. oonnectedtothapiston .an-ditsother -end extending., slidably throughsaidone .end closure and .provided with. .a ram .ofiless Width than., the small. end of, the.. .oricein ther nozzle, positioned in, centeredrelation .with .said yoriiice and. ,shaped and arranged so that after insertion. ofLthepad into said sleeve and, placement of the outer .end of the. .nozzleagainst said .aperture deiining portionof` the .part andinresponse to. shift. ci the piston toward saidone. end-closure ,and relatively to. the cylinder, it. operates. t'o. extrude the `pad .part` Way through-the.. nozzle and. into, fthe. aperture, and aut'omati'c.. piston 'actuated' means whereby when. the. rodisslid.-jby.. the.- piston. to. a position.whereintheram .is disposedadjacentlthe .outer end ofI thenozzlethe piston,` rodand ram Yare arrested. and. the` nozzle and. cylinder` .are caused. to be,.shifted away iromthe Vstructural part in. order. to extrude. the remainder .o the. pad from. said. nozzl'ef, including, a.. tubular .member .extending`V around, andY slidalileA longitudinally Withrespectto, the-sleeve .and hay-inga sidenpen.- main-registry Withthe side .opening ,in.said.s`leever. f 4HEItBEltllA.. SMITH- REFERENCES CITED. K

v"Ihef falloir/ingreferencesgarof recordiin the ile of thisA patent:` Y 1- UNITED 's'nrrnsPlfrI'EN'r-'sI

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