US2188713A - Valve core, container, and stem - Google Patents

Description

J rL'30,1-940;

I H. Z. GORA iALVE CORE, 1 CONTAINER, AND STEM- 2 Sheets-Sheet 1 Filed June 21 1937 Jan. 30,. 1940. H. -z. GORA VALVE onn, CONTAINER, AND swam 2 she ets sheet I 2 Filed June 21, 19:57

. 3 Hen/y Z Gar-w, m, WD M ratmeum 30;. f,

mesa-13 vim com-1,1 CONTAINER; s'rarrf Henry ohm;

Jenkins Brosz,

Bridgeport; Conn, assignor to Bridgeport; Gonna a corpora The. presenti invention relates: to: valve associated-therewith; a principal? of, the; invention; being tOyprovide a .valvest'em,

preferably-v capless,z-.withasimplifled but eflicient removabla valverprovisions." I'shall-describe prac tical. embodiments of' the invention; by way" of T example-,a.-,withr. reference tothe f accompanying" 1:v drawingsimwhich:

- Figure :1 is an. elevationof arubber .valvestem embodying the invention;

Figure -2 -is an: enlarged axial section of the tipendrof therstemrxofzlii'gurerl;

and -aam'odifledwi corer containen' and.

IIL'. The .core is shownr-by itself in'Fl'gure in operative association with a container: H in 30; Figures 2 "andr3, the container l l inlthese flgures being shown as. disposed in the tiptportion of a flexible rubber valve stem body 12 which as shown in Figure 1 rises from a base flap 13. 1-

The core I comprises abarrel -ll which-has 35,112- topexternal flange IS; a medial external Iii-:and. circumferentialflns or ribs -"l'l' the vflange I6-,the-1ower extremity of'the being tapered toa substantially line "edge." Se,-

cured to'the barrel below the flange l5,-preferably by vulcanization in a molding operation, a tubularrubber body l8-='whic h constitutes a part of- 'the barrel. Externally the rubber body" l8 is substantially cylindrical at itsupper portion,

being tapered therefrom to a lower'depending' skirt'portion" IQ of--' restricted. diameter; the portion? I9 *as. here. shown being cylindrical nallyf andrinternally and being internally flush with the lower portion of the barrel bore. At' itsaextremity the skirt portion IQ hasYa Thebore 20. is surmounted"by *"innervedge 2 L.

ae. bore;- portion 22 of larger diameterso that a shoulder orledgen is provided.

Aniexternally threaded plug portion" fl xhas abore 25. of the same'size-v as the boreportion uygfiriiandr has a smooth depending skirt 26 whose- I Figure-3 .is' a. section-similar to that of 'Figure" 2 but; with: the valve .partsin idiflerent relation;

Figured is; a perspective-view of the news'corey Figure 5' a.- sectionasubstantia'lly on bline- Figurer'6 K132 a evie'msimilarto that y or Figure" 3 butishowingaa-=slightlyzmodifiedformiofi-corer Figure 7 is a viewsimilar to" thatzof' Fi'gure' 3 butzishowing another/modification of the: core Figure :8 is a section'v on line r-lbf Figure 6. Referringfirs t to Figures 1 to 5, the new core isvdesignated:generallysbythe referencernumeral' lower portion-is =spun' iover 'thea flange i 5' so that the plug portion 'an'd barrel are swiveled together. The plug portion 21" has a* p"aii'- or; diametrically opposite'upstandingi similar lugs" and 28 formed thereon, I ,1 A' valve pin 29 is positionedlwithin the barrel and plug portion to be freely axially movable relativethereto and carries at it's lower-end a conical valve body- 30 wl'iichis'preferabiy formed integral therewith. The valve body 30 is of a 10 size to oooperate'with the edge 21 as aseat and is proportioned to extendin both directions past the seat'when operatively engaged with the latter'a'sshown iniFigure 3; f I The'upper'reduced'end'of th'e'pin 29 is r'e- 1g ceived in a central opening'in a circular head 3'l',"the=extremity of the-'pinbeing riveted over ashere shown iinbrder' tose'cure the parts together; 'At itsundersideithe head is provided with" a diametrical groove '32 whose end walls are g spaded iapartl a dista'nce which -is slightly greater than the-w'idth of the lugs-il and 28, the central portion of the groove beingsomewhat expanded as showu ini Figure 5.: Thetopof head 3| has formed thereon a transverserib 33; Interposed g between-the top-wall'of groove 32 and ledge 23, isa volute compression-spring which acts to pull the-valve body ill against the seat Zlwith a radial spreading tendehcybn the lower portlODQDf skirt l9. so The tubular container H is preferably of cir-'- cular section throughout; Its"circul'ar upper end opening 35 is only slightly largerthan the head 3'l'so' that the latter, without any unnecessary clearance,- is freely; slidable therein. Below the 35 end opening-35* the inserthas aninterior annular enlargement 3 6 which is of appreciably larger diametenthan the diameter'of head 3|. Below the enlargement 36 the insert is interiorly annularly contracted at 31 and provided with 40 threads w'which are operatively' engageable by the threads of the plug' portion, 24': Below the threads the interior surface of the insert is substantially cylindrical at- 39 down toaninwardly tapered-seat "lll'below which is a flared surface 4 I Externally the lower portion of the" insert 3 may be provided with" progressively enlarging ciri aumferentialribs or 1 object 1 flange below barrel exter I shown; is embedded" inthetip portion of the rubber body I 2 ftoibecompletely laterally covered thereby; being-vulcanized therein during-a molding 'operatiorn The" 'fl'are'd portionl 4]" of the 'I'he containeror; tubular insert-:lLf'as here so I insert'is covered-by'a molded band'fl" of rubber and 28 whereupon the head may be turned to screw the plug portion 24 to the position shown in Figures 2 and 3. The rib'33 may be engag'ed' by a suitable tool so that the head may be. positively rotated. Any other provisions whereby the head maybe engaged by a suitable tool may be usedas well as any other suitable means whereby rotative movement of the head may transmitted to the plug portion. In Figure} the core is contemplated as just hayingbee'n turne'd'to final position in the container. rhe tapered portion or the rubber body I8, is seeteu'tighuy against the shoulder 40, but,

' as shown, there is a slight clearance between the skirt I9 and the rubber bore portion 42. When the head is no'wreleased the spring 34 lifts the valve body 30'into engagement with the seat 21,"

but notquite to the'position shown 'in Figure3 and the itop'sur'face "of the headat the sides of the the rib is" not quite flush with the top of the insert. The skirt I9 is not appreciably or' di narily, distorted under the conditions assumed, since the force of the spring'is preferably such in relation to the radial yieldability of the skirt that the latter. is not appreciably spread. However, when the tube with which the valvestem is associated fis fllledfwith air, the valve body ,30 forced upwardly relativefto the container I I so that'the part's' jtake the relation .shoW'n in Figure 3, the skirt l9 being spread into sealing contact with the rubber bore portion 42. Not only does this assist in preventing air from leaking up: wardly between the barrel and container, but'it also provides a lap for the joint between the upper end of the band of rubber 42 and the surmounting portion of the insert so that air is most efiectively prevented from getting between the lower end of the insert and body l2. I

If it is desired to remove the core the head is pressed inwardly into engaging relation with the plug portion and the latter is turnedout. The

barrel immediately follows'the' plug portion upwardly due to the swivel connection between the two parts. i a

As above stated, in the absenceof air pressure on the lower end'of valve 'body 30, theskirt will be substantially in the undistorted condition shown in Figures 2 and 4, since it able to withstand the spreading tendency of thevalve,

body. Evenif it should be spread, itwill immediately resume its undistorted-condition when the coreis assembled withthe container and will formno' obstruction to the insertion of the core due to the fact that the valve body-is moved out of-the skirtlS when the head is clutched with the plug portion.

The edge 2| forms an initial line contact 1 theconical body 30 and this is of importance in securing aproper seal. When the head is in the upperv end of the insert as shown in Figure 3, it

is positively centeredand the axis 01 the valve 'body is maintained perpendicular to the plane of the circular edge'so that uniform circumferential contact isjassured.

*Wn'en the valve h'ead isin the position shown in Figure 3, the stem is effectively closed against ingress of foreign matter such as dust and'water.

In the inflating operation the head is moved by the usual chuck pin to a position in enlarge ment 36 so that air is enabled to pass the-head.

The space between the bottom of the valve head andthe top of the plug portion lugs is preferably greaterthan the unseating movement of the head? I in the inflating operation.:Qtherwiseit would 10 the groove of the head always in register with i be necessaryto provide means'for maintaining the lugs.

The corelcontainer need not necessarily be a' part-of arubber valvestem but could be con I stituted by a portion of a metal valve stem, as is obvious.

The arrangement? shown in Figures 6 and 8 is When this core assembled with *the'insert the barrel reaches "its seating position by an initial] direct rectilinear movementand relative depression of the headbrings the latter into' engage ment with the plug-portion which can-thenbe turned to'position," forcing the barrel against its seat." Since the plug portionand barrel are not connected together the latter will not follow the ,former when it is unscrewed and-must be pulled" out after the plug-portion is unscrewed: If it should be required that the spreading tendency of the valve bodybe immediately relieved at'the I start of the assembly operation the seat for the lower end of the spring may be placed .onl'the plugportion instead or 'on'the'barrel. In *such case the plugportion is'merely provided with an internal annular ledge of suflicient width'to're ceive the lower end of the spring securely'and thespring is made of'appropriate length. The container need not be confined in length to the tip portion or the stem, although it should" I be if it is desired to provide'a' stem of the utmost flexibility. In Figure 7 I'haveshown'a container 45 which is of greater length than the container previously described, extending even to the lower extremity of the stem, if 'desir'd'. Also, in--the construction shown in Figure 7-, the plug portion 46 and barrel 41 are integrally joined.

The stem body 12 is'of rubber or rubber composition designed with-particular referenceto the requirements of a flexible rubber valve stem and these are notalwa'ys consistent with the best heat resisting and sealing'qualities'. The rubber valve portion l8," being separate from'the 'stem= body, can emphasize thesev'latter qualities." The term "rubber as used herein includesany suit able composition of rubber or other materials of v similar characteristicso In the drawings, the stems are shown inupright position and the terms "upper" and lower" 7 are used herein with reference to that position and merelyas a matter-of convenience. Variations from the specific disclosuresherein are; of course, possible "without departure from. the invention and accordingly =I do not: limit myself as to details 'of' form and arrangement "except as" in the following claims.

- 1; A valve core comprising a barrel which in-' cludes afreely depending flexible rubber skirt portion at its inner end; a yalve pin=extending freely axially ofsaid barrel, a conical valve body carried by the inner end ofsaid'pin and adaptedto seat against said skirt portion at thepfree end two are;bro,ught together,

threaded plug portion-having an axial opening in which a portion of the pin intermediate said barrel and head ismoably received, a compression spring surrounding said pin andbearin'g at vone end againstsaid head so as normally to seat said valve body, said head being spaced from said plug v.portion when said valve body is seated, and means on said headand plug portion respectively which interlock for the purpose of transmitting rotative movement of the former to the 'latter when the 2. A valve-core comprising a barrel which includesafreely depending flexible rubber skirt portion at its inner end,.-a freely axially of said barrel, a conical valve body carried by the inner end of said pin and adapted to, Seat against said skirt portion at the free end of the latter with a radial spreading tendency thereon, a head on the other end of said pin, a.

threaded plug portion havingan axial opening in which a portion of the pin intermediate said bar-' rel and head is movably receiv' d, a compression spring surrounding said pin and bearing, at one end against said head was normally to seat said valve body, said spring maintaining said head in spaced relation to said plug portion when said valve body is seated, and means on said head tion respectively whichinterlock for the purpose carried by the inner end of and plug portion respectively which interlock for the purpose of transmitting rotative movement of the former to the latter when the two are brought together. i

3. A valve core comprising a barrel which includes a freely depending flexible rubber skirt portion at its inner end, a valve pin extending freely axially of said barrel, a conical valve body said pin and adapted to seat against said skirt portion at the free end of the latter with a radial spreading tendency thereon, a head on the other end of said pin, a

threaded plug portion having an axial opening in which a portion of the pin intermediate said barrel and head is movably received, a compression spring surrounding said pin and bearing at one end against said head so as normally to seat said valve body, said head being spaced from said plug portion when said valve body is seated,

the seating pressure exerted'by said spring being insufllcient to spread said skirt portion appreciably, and means on said head and plug porof transmitting rotative movement of the former to the latter when the two are brought together.

4. A valve core comprising a barrel which includes a freely depending flexible rubber skirt portion at its inner end, a valve pin extending freely axially of said barrel, a conical valve body carried by the inner end of said pin and adapted to seat against said skirt portion at the free end of the latter with a radial spreading tendency thereon, a head on the other end of said pin, a threaded plugportion having an axial opening in which a portion of the pin intermediate said barrel and head is movably received, said barrel and plug portion being formed as separate parts, acompression spring surrounding said pin and bearing at one end against said head so as nor-' mally to seat said valve body, said head being spaced from said body is seated, and means on said head-and plug portion respectively which interlock for the purpose of transmitting rotative movement of the former to the latter when together.

thereon, 'a head, 'on

valve pin extendingf plug portion when said valve the two are brought s .5. Aivalve, core comprising a, barrel which includes, a. freely depending flexible rubber skirt portion at its nner fend," a valve" pm extending freelyaxiaily of said barrel, a conical valve body carriedby theinner endof' said pin and adapted toseatffagainst said'skirt portion at" the free end. of the. latter ,witha radial spreading ter'idency the other end of. said pin, a threaded plugportior' having an axial opening in which'a portion'ofthe pin intermediate said barrel,,h ead is ovably' received, said''barrel and plug portion 'being" formed as separate i parts which alie swiveled together, a compression spring surrou' ding said pin end against said head so as normally to: seat said valve body plug portion when said valve body is seated, and means on said headandplug portion respectively which interlock for the purpose {of transmitting said head beingspace'd'from said rotative movement of the former to 'the latter when the two are brought together.

- 6." A valve stem comprising a rubber body having a through bore, a core container embedded in said body and lining one' end of said bore,

, a valve core in-said container, said core including a barrel which has a flexible rubber skirt portion projecting beyond the inner end of said container to. lap the walls of the bore therebeyond, and a conical valve body adapted to seat in the free end of said skirt with a tendency to spread the latter into external sealing contact with said walls.

'1. A valve stem comprising a rubber body having a through bore a core container embedded in said body and liningone end of said bore, a valve core in said container, said core'including a barrel which has a flexible rubber skirt portion projecting' beyond and lapping the joint between the inner end of said container and the contiguous walls of said bore, and a conical valve body adapted to seat in the free end of said skirt portion with a tendency to spread the latter into external sealing contact with said walls.

8. A valve stem including a core container and a core operatively retainable in said container, said core comprising a barrel which includes a depending flexible rubber skirt portion of tubular form at its inner end, said skirt portion having a sharp inner edge at its free end, a valve pin extending freely axially of said barrel, a conical valve body carried by the inner endof said pin and adapted to bear against said edge as a seat with an initial line contact, said valve body being longer than its possible zone of contact with said edge so that its conical surface projects in both directions past'the seat in all cooperative relations of said valve body and seat, spring means normally seating said valve body, and a head on the outer end of said pin and substantiallyfilling the'outer end portion of said container when said valve body and seat are in cooperative relation, said container being interiorly enlarged inwardly of said outer end portion and the head being freely slidable .in said portion and being movable into the container enlargement relative-to said barrel.

9. A valve stem comprising a rubber body hav and hearing at oneing a through bore, a tubular core container embedded in said body and lining, one end of said bore, the inner end of said container being interiorly annularly overlapped by the body material, a valve core in said container, said core including a barrel which has a flexible rubber skirt portion projecting beyond and overlapping the joint between the first overlap'and the core confree end or saidi sklrt -portion with a tendency to spread the latter against theborebortions contiguous-tosaidjjoint. s

' 10. A valvestem ocomprising a.frubber bddy having 8; through -b0r,e, a tubular 'core container embedded in said body and lining one end vo fr said bore, the inner end of :said rc ntainer -being interiorly annularly'overlapped by the xbodyl material, e,v valve core in said container; saidcoreinchiding a. barrel-which hasgafiexiblehrubbera'skirt portion projecting: beyond and overlapping :the

joint between the firsizaove'rlapandflthe core container, end a valve bod-y adapted to'--seat;in 'the free'end of said skirt portion-with a; tendency t0 spread the latter. againstv the bore portions contiguous to saidjoint, the spreading tendency of said valve body being in proportion to the Fair pressure aLflFecting the valve body.

said bore, '-the inner end-gbfsaid containefiibeing .interiorl y annuIarIyIo erIappedL- by the bodyfma- 1 .;teria1; "a valve more ansaid --con 1:ainer,* said can ineluding .a. barrel which has n 'a flexible irrubber skirt.a portion :of -ciroular cross-section,ieproject 1 ing' beyond and 'overlappingaFthe Ij oint '-.between 1 '1"the first overlapgandithe "core container,= saidfq ro- "j jec'ting; "skirt 31301431011 --1n 'fits i- -natural, sconditio'nf shaving an external 'diameter appreciably-Jess thanthe diameterro'f thei boremt said' ,iidinh 'and a" conical via;lve'ihczjd cooperatingewith the free v "end ofr's'laid eseaseati'and adapted .-'to3spre9;d;f1'

' said'prejeoting f'skzlrt gportion into "sealing" contact with "the bore:portionsieontiguousto said- 10" t.

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