US2293132A

US2293132A - Valve core, container, and stem

Info

Publication number: US2293132A
Application number: US134863A
Authority: US
Inventors: Henry Z Gora
Original assignee: JENKINS BROS
Current assignee: JENKINS BROS
Priority date: 1937-04-03
Filing date: 1937-04-03
Publication date: 1942-08-18
Anticipated expiration: 1959-08-18

Description

Aug. 1 8, 1942, v H z- GORA 2,2934132 l* I VALVE CORE, CCNTAINEB, AND STEM Filed April '5, 1957 Henry Z". Gof;

Awhich is accessible, to the plug portion.

Patented Aug. 18, 1942 .VALVE CORE, CONTAINER, AND STEM Henry Z. Gora, Bridgeport, Conn., asslgnor to Jenkins Bros., Bridgeport, Conn.,

tion of New Jersey Application April s, iss'zfserial Nn. 134,863

' Claims.

The presentinvention relates to valve cores, core containers and to rubber valve' stems embodying the cores and containers, a principal object being to provide a capless type of stem wherein the core may be readily screwed in or out in assembly and replacement.

The standard valve core comprises a plug portion which must be threaded to position in a container. According to the present invention the usual pin of the standard core is provided with a head, spaced from the plug, which normally lls the extremity of the core container for the purpose of excluding foreign matter. The container inwardlyoi the normal position of the head isinternally enlarged so that when, as in an inilating operation, the head is moved into the enlarged zone, air may readily pass the head.

With such an arrangement the plug portion cannot be directly gripped for the purpose of screw-S ing it completely to or from its operative position,

since access to it is blocked by the head. 'I'his difliculty I overcome herein by providing means for transmitting rotative movement of the head, One such means is shown by way of example in the accompanying drawing, in which:

Figure 1 is an elevation of aI rubber valve stem incorporating the present invention;

Figure 2 is an enlargedv section substantially on line 2-2 of Figure 1;

I'I which extends axially through the barrel l2 and projects above and below the plug and barrel.

At its lower end the pin I1 has secured thereto a cup I8 which carries a compressible washer I9 for direct cooperation with the vseat I3. Strung on the pin I1 is a volute compression spring whose lower end seats on the ledge Il, the upper end of the spring bearing against abutments as at 2| on the pin Il. `The spring 20 thus actsl tohold the movable valve body constituted by members I8 and I9 yieldably against the seat I3.

At its upper extremity pin I1 is reduced at 22 and is received in an opening in a head' 23 of circular cross section.

The head 23 on its face toward plug I6 is provided with a diametrical recess or groove 24 against the top wall of which bears the shoulder which exists at the upper end portion of pin I1 by reason of the size reduction of the latter and the extremity of the pin is riveted over in a counter-sink formed atV the top of the head opening so that, as here shown, the head is rigidly xed on the pin. The` top face of the head isv relieved at opposite sides to produce an upstanding diametrical rib or tongue 25.

The container II is inthe form of a tubular metal stem portion of circular cross section pro- `vided at its' upper or outer extremity with a Figure 3 is a view in perspective of the core appearing in Figure 2; and

Figure 4 is a plan view of the structure of Figure 2.

Referring to the drawing, the core is shown I by itself in Figure 3 and is generally designated by the reference numeral ,IIL In Figure 2 the core is shown in operative position in the container generally designatedby the reference numeral II. i y

rThe core, except for the addition of a head and the necessary modification of the valve pin in order to receive the head, may be of standard construction and is so shown in the drawing. It comprises a barrel I2 whichat its lower extremity has an annular valve seat I3 which is surmounted by an internal annular ledge I4. Near its upper end the barrel is exteriorly annularly relieved for the 4purpose of receiving a packing band I5.

circular opening 26 of slightly greater diameter than head 23 so that when the latter is in the normal position shown in Figure 2 its full c ircular portion closes the opening. The clearance is preferably extremely small, that is, merely suincient to permit free axial movement of the head inthe opening upon reciprocation of the pin I1 so that proper sealing of the movable valve body will in no way be interfered with.

Below the end opening 26 the container is internally conically enlarged, at '21, downwardly and outwardly to a cylindrical enlargement 28 below which the internal walls of the container are inwardly approached at 29 and provided with threads 29' engageable by thefplug portion I6. Below the threads the internal walls i of the container are downwardly and inwardly form with its longitudinal edges externally threaded and is provided with a longitudinal openingwhich slidably receives` the valve pin I5. n The core and container are shown in operative relation in Figure '2, the parts being in their tapered to provide a seat for the packing band ber portion between the head and the movable valve body. Foreign matter, such as dirt and water, is effectively excluded from the container.

Assuming it to be desired to replace the core, it is evident that the plug portion I5 is entirely inaccessible to a tool of any kind in view of the presence of the head 23 which blocks the upper end of the container. With the provisions herein disclosed, however, the head 23 may be depressed by a suitable tool to engage the upper part of plug I5 in the groove 24, this part of the plugk and theI groove constituting interengageable clutch means between the head and plug so that rotative movement imparted. to the head is directly and positively transmitted to the plug. With the head and plug interengaged the latter may be readily screwed to position in the container or unscrewed therefrom, the rib 25 being readily engageable by a suitable tool so that the head can be conveniently manipulated.

'I'he plug portion I5 is here shown as being separate from the barrel I2, but this is merely illustrative structure, it will be understood. With the illustrated core construction the threads of the plug portion I5 should preferably be engaged with` the threads 29' to a longitudinal extent which is greater than the distance between the top of plug portion I8 and the top of the recess 24 so that upon unscrewing the plug portion from the normal position shown in Figure 2, the barrel I2 will be lifted from its seat due to the rise o f the plug portion by reason of its unthreading movement. At the same time the distance between the bottom of head 23 and the top of the plug portion must be suiiicient to permit the head to pass inwardly for adequate air passage when the usual air coupling is applied to the stem.

In some of the standard cores the plug portion and barrel are swiveled together and in others the plug portion and barrel are made as a single piece. In these cases the barrel, of course, immediately follows the plug portion as the latter is unscrewed.

Any form of interengaging means between the head and plug may be provided, the groove 24 being here shown as designed to receive any suitable upstanding portion or portions of a plug. Rib 25 is preferably at right angles to groove .24 so thatA the head 23 will have maximum strength.

The container or tubular metal stem portion II may be associated with an inilatable body such as the innertube of an automobile tire in any suitable manner, but as here shown it is incorporated, Figures 1 and 2, in lining relation to the upper portion of` the through bore 30 of the elongated body portion 3| of a rubber valve stem 32.

The valve stem 32 is of flexible rubber and has a base attaching flap 33 which is preferably circular in plan. 'I'he ilap is marginally tapered to a thin edge at 33a, there being a shoulder 33h at the inner boundary of the tapered portion,

this shoulder bounding a circular ilat portion 33o at the base of the body 3| and concentric therewith.

The body 3l is shown as being of generally tapered form from base to tip and is circular in cross section. It has a gradually tapered portion 34 rising from the flap 33 to a more abrupt inwardly and upwardly curved portion 35. The portion 35 is surmounted by a cylindrical porshown in Figure 2 the external shape of the`upper endv of the insert II e determines lthe shape of the

upper portions

36 and 31 of the body 3| which in these zones has:a substantially uniform thickness. The insert is laterally completely rubber-covered, as here shown.

The insert I I is preferably bonded in the rubber body by vulcanization during the molding operation and to enhance the bond maybe provided with circumferential ribs 'or ilns Ila as shown in Figure '2.

It will be understood that the application of the present invention is not limited to rubber valve stems and that when applied to rubber valve stems the container may be of any desired length. I prefer, however, to confine the length of the container in a rubber valve stem, to the tip portion o f the stem since greater stem nexibility is thus secured. 'I'he insert is preferably completely covered laterally by the stem material, as shown, but may project above the stem material if desired.

In a metal valve stem the container II might .be merely the upper portion of the stem.

I do not limit myself to these matters except as in the following claims.

I claim:

1. A valve core comprising a valve pin, a valve body carried by said pin at o'ne end of the latter, a barrel portion through which said pin extends, said barrel portion having at one end a seat for cooperation with said valve body, spring means normally seating said valve body, an externally threaded plug portion at the other end of said barrel, said plug portion havingan opening through which said pin slidably projects, a head on the other end of said pin and spaced from said plug portion when said valve body is seated, and normally inoperative clutch means rendered operative to transmit rotative movement of said head to said plug portion only when said head is moved toward said plug portion.

2. A valve core comprising a valve pin, -a valve body carried by said pin at one end of the latter, a barrel portion lthrough which said pin extends, said barrel portion having at one end a seat for cooperation with said valve body,vspring means normally seating said valve body, an externally threaded plug portion at .the other end of said barrel, said plug portion having an opening through 4which said pin iprojects, a head on the other end of said pin and spaced from said plug portion when said valve body is seated, and normally inoperative clutch means rendered operative to transmit rotative movement of said head to said plug portion only when said head is moved toward said plug portion, said clutch means being constituted by interengageable parts of said head and said plug portion. v

3. In combination, a tubular metal valve stem portion and a core therefor, said core comprising a plug threaded in said tubular valve stem portion and having an axial opening. a pin slidtion 36 which joins a conical tip portion 31. As 75 able in said opening and projecting therefrom in both directions, valve provisions including a movable valve member carried by said pin at one end of the latter, a head on the other end of said pin and normally positionedjand of .such size as to substantially iill an extremity of said tubular valve stem portion, spring means normally holding said head in its normal position and maintaining said valve provisions closed, said head in its normal position being spaced from `said plug pontion, said tubular valve stem portion being interiorly enlarged between its extremity and said plug portion, and means for transmitting rotative movement of said head to said plug portion. i,

4. In combinatioma tubular metal valve stem portion and a cor'e therefor, said core comprising a plug threaded in said tubular valve stem portion and having an axial opening, a pin in said opening and projecting therefrom in both directions, valve provisions including a movable valve member carried by said pin at one end of the latter, ahead on the other end of said pin and normally positioned ando! such` size as to substantially lill an extremity of said tubular valve stem portion, spring means normally holding said head in its normal position and maintaining said valve provisions closed, said head in its normal postion being spaced from said plug portion, said tubular valve stem portion being interiorly enlarged between its extremity and said plug portion, and clutch means rendered `operative to transmit rotative movementy of said head to said plug when said headisA moved toward said plug portion.

5. In combination, a tubular metal valve stem portion and a core therefor, said core'comprising a plug threaded in said tubular valve stem portion and having an axial opening, a pin in said opening and projecting therefrom in both directions, valve provisions including a movable valve member carried by said pin at one end o! the latter, a head on the other end of said pin and normally positioned and of such size as to valve stem portion, spring means normally holding said head in its normal position and maintaining said valve provisions closed, said head in its normal position being spaced from said plug portion, said tubular valve stem portion being int-erorlyV enlarged between its extremity and said plug portion,v and clutch means rendered operative to transmit rotative movement of said head to said plug when said head is moved toward said plug portion, said clutch means being constituted by interengageable portionsof said head and said plug portion.

6. A valve stem comprising a rubber body having a through opening, a tubular metal insert bonded in said body and lining at least the outer end portion of said opening, a valve core in said insert, said core including a plug portion threaded in said insert and a reciprocabie valve pin extending through said plug portion, a head on lsaid. pin and normally iilling the tip endo! said insert, said insert being internally enlarged inwardly of the normal positionof said head, and means for transmitting rotative movement of said head to said plug portion.

7. A valve core comprising a valve pin, a valve` body carried by said pin at one vend of the latter,

a barrel portion through which said pin extends. said barrel portionhaving at one end a seat for on the other end o! said pin and spaced from said plugportion when said valve body is seated, said head having a groove on its underside adapted to receive an adjacent part of said plug portion only when the head and plug portion are made to approach each other whereby to transmit rotative movement of said head to said plug portion.

8. A valve core comprising a valve pin, a valve body carried by said pin at one end of the latter, a barrel portion through which said pin extends, said barrel portion having at one end a seat for cooperation with said valve body, spring means normally seating said valve body, an externally threaded plug portion at the other end of said barrel, said plug portion having an opensubstantially iill an extremity of 'said tubular ing through which said pin slidably projects, a head on the other end of said pin and spaced from -said plug portionwhen said valve body is seated, said head having a groove on its underside adapted to receive an adjacent part of said plug portion only when the head and plug portion are made to approach each other whereby to transmit rotative movement of said head to said plug portion, said head also having an outer transverse means by which it may be engaged to be rotated by a suitable tool, saidmeans being at right angles to said groove.

9. In combination, a tubular metal valve stem portion and a core therefor, said core comprising a plug threaded in said tubular valve stem portion and having an axial opening, a pin slidable in said opening and' projecting therefrom in both directions, valve provisions including a movable valve member carried by said pin at one end of the latter, a head on the other end of said pin and normally positioned and of such size as to substantially iill an extremity Qi said tubular valve stem portion, spring means normally holding lsaid head in its normal position and maintaining said valve provisions closed, said head in its normal position being spaced from said plug portion, said tubular valve stem portion being interiorly enlarged between its extremity and said plug portion, said head having a groove x adapted to receive an adjacent part oi said plug cooperation with said valve body, spring means normally seating said valve body, an externally threaded plug portion at the other end of said barrel, said plug portion having an opening through which said pin slidably projects, a head portion when the head and plug portion are made to approach eachother whereby to -transmit rotative movement of said head `to said plug portion.

10. In combination, a tubular metal valve stem portion and a core therefor, said core comprising a plug threaded in said tubular valve stem portion and having an axial opening, a pin slidable in said opening and projecting therefrom in both directions, valve provisions including a movable valve member carried by saidpin at one end of the latter, a head on the other end or said pin and normallyA positioned and of such size as to substantially illl an extremity of said tubular valve stem portion, spring meansnormally holding said head in its normal position and maintaining said valve provisions closed, said head in its normal position being spaced from said plug portion, `said tubular valve stem portion `being,

interiorly enlarged between its extremity and said plug portion, said head having a groove adapted rto receive an adjacent part of said plug portion when the head and plug portion are madeto approach each other whereby to transmit rotative movement of said head to said plug portion, said head also having an outer transverse means by wlhlicltioit1 may be engaged to be rotated by a suita e o HENRY Z.