US2240096A - Valve stem of the capless type - Google Patents

Description

April T941- H. z. GORA VALVE STEM OF THE CAPLESS TYPE Filed May 25, 1940 HQIILY/ Z. GOI'cL.

Patented Apr. 29, 1941 UNITED STATES PATENT OFF-ICE 2,240,096 VALVE STEM or run CAPLESS TYPE Henry Z. Gora, Bridgeport, Conn., assignor to Jenkins Bros, New York, N. Y., a corporation of New Jersey I Application May 23, 1940, Serial No. 336,804

Claims.

The present invention relates to valve stems of the capless type. and more particularly to the valve cores thereof.

It is an object of the present invention to provide a valve stem of the type characterized which is of improved construction to facilitate assembly and disamembly of a valve core with and from the stem.

Another object of this invention is to provide a construed as a definition of the limits of the invention, reference being had to the appended claims for that purpose.

Referring in detail to said-.drawing', wherein the same reference characters are employed to designate corresponding parts in the several figures,

Fig. 1 is an axial section of one embodiment of the present invention,

Fig. 2 is a top plan view of the embodiment of Fig. l;

Fig. 3 is a view corresponding to Fig. 1 but oi another embodiment of the present invention;

Fig.4 is a top plan view of the embodiment of Fig. 3;

Fig.5 is an elevation of a member of the core body which may be used with either of the foregoing embodiments; and i Fig. 6 is an elevation of the head used on the valve pin according to the embodiment of Fig. l, but illustrating the modification of said head according to the embodiment of Fig. 3.

As shown, the rubber valve stem body In has embedded in its tip portion a container or tubular insert II which extends to the extremity of said rubber body and is laterally coveredthereby substantially throughout its entire extent, being preferably vulcanized into said rubber body during the molding operation. As illustrated the outer periphery of said container ii may be provided with any suitable number of exteriorly projecting ribs or fins l2, which may be of any suitable size and form and are shown as of progressively increasing size and projecting to proe gressively increasing extents toward the inner end of the container. Said ribs or fins are of such number, size and disposition along the length of said container as to assure that said container .shall be permanently secured in therubber body against dislodgement either by the air pressure from within the valve stem or by the handling and treatment to which the stem is subjected.

Said container at its outer extremity has a cylindrical bore, as shown at l3, and inwardly of said cylindrical portion said bore is provided with threads I to receive the core as hereinafter described. Inwardly of said threaded portion I the bore is cylindrical as shown at 15, the

diameter ofsaid portionTlS being no greater" than the inner diameter of the threads I4, and said portion l5 terminating in an inwardly inclined orbeveled portion l6 for a purpose to be described. Inwardly of said beveled portion is the bore of said container is preferably cut away and flared outwardly as shown at II to receive rubber body material, as shown at [8, during the molding operation, to the end that the inner extremity of the container I I is entirely confined within the rubber of said body, both lnteriorly and exteriorly thereof, to prevent the air under pressure from dislodging said container.

Mounted within said container II is a core which may be inserted into and withdrawn from said container as a unit. The body of said core is composed of two sections which may be suitably united but which preferably constitute separable parts for a purpose to appear. The outer body member 20 of said core is of generally cylindrical form at its outer end, as shown at l9, and of such diameter as to snugly fit the cylindrical bore I 3 of said container ll. Inwardly of shown at 25 and extends at said enlarged diameter as shown at 28 for the greater part of the cylindrical portion i9 0! said body member. Where the passage approaches the constrictedportion 2|, it also is constricted by a beveled wall 21, and is continued as a substantially cylindrical passage 28 through the threaded portion oi member 2II to the inner extremity of said member. Member 2. is also provided with a pair of diametrically opposed slots 2! which extend inpvardly from the outer end of said member for a major part of the length 01 the outer cylin drical portion i! 01'! the member II.

The inner member 30 01 the core body is provided with an outer cylindrical portion 3| designed to snugly fit the cylindrical portion I5 01 the: container il. Inwardly of said cylindrical portion 3| is a second generally cylindrical portion 32 of smaller diameter so as to provide an inwardly facing shoulder 13. The. inner extremity of said portion 32 is inwardly tapered as shown at II to approximate a sharp edge at its innermost extremity. The peripheral wall of portion 32 is also provided with a suitable number of outwardly extending ribs or fins l5, and

secured to the member 30 below the shoulder",

preferably by vulcanization during a molding operation, is a tubular rubber member 36 which 5 rounds the portion I! of member ll and which terminates at its inner extremity in a depending skirt portion 31 of smaller diameter. The outer portion of member 38 is preferably flush with the periphery of the portion ii of said member 30 Interiorly said body member ll has a passage extending therethrough, said passage at its outer portion 3| being generally cylindrical and oi sub-- stantially the same diameter as the portion II of the passage in the outer member 20.. The inner portion 3! of said pamage is of smaller diameter than the portion 38 so as to provide an outwardly facing shoulder II, and is preferably of substantially the same diameter as the passage through 3 the free end of the skirt 31, The outer diameter or said skirt ll may be somewhat smaller than the passage 4i extending through the body of the stem so as to leave a small clearance as shown at. u for ap pose to be explained.

The valve provisions include a valve member 45, a valve pin ll to which said valve member 45 may be secured in any suitable way, or said valve member may be integral with said valve pin, a head 41 formed integrally with or suitably attached to said valve pin 4, and a coil spring 48 adapted to seat on the shoulder II and react between said shoulder and said head 41. Valve member I! may take any suitable form, but is shown as generally conical in shape so as to make a nearly line contact with the innermost inner edge oi. skirt 31. Head 41 may be attached to the valve pin II in any suitable way, and is provided with diametrically disposed radially extending ribs or keys 9, which may be formed integrally with or suitably attached to the head 41, and which are of such size and shape in cross section that they substantially fill but slide freely in the slots 2! heretofore described.

Head 41 is of such diameter that it substantially fills but. slides ireely in the aperture N which constitutes the outer extremity of the passage through the core member 20. The outer face of head I! may be nearly flush with the outer extremity of said member 20. but as shown it preferably projects somewhat beyond said member and is provided with a rounded exterior surface. Said exterior surface 50 is preferably smooth and uninterrupted as shown in Figs. 1, 2 and 6, but if preferred said head may be provided with a diametrically extending kerf 5| as shown in full lines in Figs. 3, 4 and 6.

In assembly the core body portions 20 and may be telescoped over the pin 46, and when the coil spring is has been seated on the shoulder 40 the head 41 maybe attached to the I in any suitable way, and then the entire unit composed of the core body portions 20 and 30. the valve member 45, pin 48, head. ll and interposed spring ll may be inserted into the container II as a unit. By means of. a screw driver or other suitable instrument the head 41 may be depressed into the passage through the member 2| until the extremity of the: screw driver or other tool is engaged in said slots 2!. Thereupon the member 2| may be rotated to engage the threads 23 in the threads ll, advancing the inner core body member ll ahead oi the member 2| but rotating independently thereof. until the rubber sleeve ll, 31 is tightly seated on the beveled seat ii in the container II with the depending skirt 3! occupying the position shown in Figs. 1 and 3'. Upon removal of the screw driver or other tool the spring ll restores the parts to the position shown in Figs. 1 and 3, the head 41 snugly filling the aperture N so as to prevent substantial admission oi dust, moisture and. other ioreign matter into the passage through. the stem.

When it is desired to inflate the tire, by use oi any suitable coupling applied to the outer end of the Stem, the head U is moved inwardly into the enlarged portion 28 of the passage through the member II, so that air may now freely around said head 41 and thence inwardly through the before described pasages, and as the valve member 45 is removed irom its seat when the head I! is moved inwardly, the air may now ireely between the valve member I! and its seat at the inner extremity of skirt 31 and into the passage 4!. when pressure is removed from the head 41, spring 48 will restore the parts; to the relationship shown in Figs. 1 and 3, and the pressure of the air on the valve member I! supplemented by the action of spring 48 will press valve member 45 into tight sealing engagement, of a nearly line like character. with the edge 01 the Skirt 37. also tending to press said skirt 3! outwardly so as to seal the latter against the wall of the bore II and prevent leakage 0! air around the periphery thereof.

During inward and outward movement oi the head 41 said head and the parts associated therewith are guided by the engagement of the keys is in the slots 29, and when the head is in its outermost position to close the passage at 24 said keys I! fill the slots 29 to prevent substantial admission oi dust, moisture or other foreign matter through said slots. Thereby the core is provided with means in the form of slots for engagement by a screw driver or other tool to facilitate insertion and withdrawal 0! the core without said slots constituting a passage by which foreign matter can get into the passage through the stem.

While slots as described in the core body member 20 are suillclent for the improved facility of inserting and withdrawing the core, the head I! may. as before described. be also provided with the kerf 5|, which gives somewhat greater flexibility in the size of the tool that may be used, because if the extremity of the screw driver or other tool is not of suflicient transverse dimensions to engage in the slots 25, rotation 01 the head 41 will transmit rotary movement to the core member 20 because of the engagement of the keys 48 in the slots 29. It will be noted that even though the head 47 is provided with the keri 5|, said kerf does not have to be aligned with the slots 29 because, if the tool is of a transverse dimension greater than the diameter of the head 41, engagement oi the tool with the slots 29 will automatically depress the head 47 ahead 01' the tool.

While the passage through the core members has been described as cylindrical, it will now be perceived that such is not essential provided that the parts may cooperate in the manner herebefore described. Thus the passage through the outer extremity of the core body member may be made other than circular and the head 4! be corres-pondingly shaped. Other changes may be made as will now be apparent to those skilled in the art without departing from the spirit of the present invention.

It will therefore be perceived that a capless valve has been provided which greatly facilitates insertion and withdrawal of the core assembly because it is unnecessary to clutch a head on the core assembly, or otherwise bring parts which are not necessarily in alignment into such a cooperative position as will enable a. transfer of torque from one to the other of said members;

While one particular form of core assembly has been described with considerable particularity because now preferred, it is to be expressly understood that the invention is not restricted to use in a core assembly or the type illustrated and described, and which in its broader aspects is the subject matter of my prior Patent No. 2,188,713, granted January 30, 1940, for Valve core container and stem. Therefore it is to be expressly understood that the present invention may be incorporated in any other suitable construction of core and core container, and reference is to be had to the appended claims for a definition of the invention.

What is claimed is:

1. A valve core comprising a valve pin, a valve body carried by said pin at one end or the latter, a core body through which said pin extends, said body having at one end a seat for cooperation with said valve body, spring means normally seating said valve body,'an exteriorly threaded portion on said body, said body having a passage through which said pin extends, and a head on the other end of said pin for closing the passage through said body, said body having slots to receive a tool to transmit rotation to said body and said head having corresponding ribs engaged in said slots for closing said slots.

2. A valve core according to claim 1 in which said head is provided with a transversely extending kerf.

I closed, said member being interiorly enlarged inwardly oi said extremity, and a rib and slot connection between said head and said member..

4. In combination in a valve stem having a core container, a core therefor comprising a member threaded into said container and having an axial opening, a pin extending through said opening and projecting therefrom in both directions. a valve member carried by said pin at one end thereof, a seat for said valve member, a head on valve pin with a barrel or other/member of the the other end of said pin normally positioned in and of such size as to substantially flll the extremity of the passage through aid member,

spring means normally holding said head in its extending therethrough, a valve member cooperating with said seat, a valve pin extending from saidvalve member through the passage in said core body, a head on said valve pin normally closing the outer end of the passage through said core body, said passage being enlarged inwardly of its extremity so that when said head is de- I pressed air may flow therearound, and a rib and slot connection between said head'and said core body.

'7. In a rubber valve stem of the capless type, in combination with an interiorly threaded core container, a core body having. a threaded portion and a valve seat, said core body having a passage extending therethrough, a valve member cooperating with said seat, a valve pin extending from said valve member through the passage in said core body, and a headon said valve pin normally closing the outer end of the passage through said core body, said passage being enlarged inwardly oi its extremity so that when said head is depressed air may flow therearound, said core body having diametrically opposed slots adapted to receive a tool for threading said body into and out of operative position in' said conin combination with an interiorly threaded core container, a core body having a threaded portion and a valve seat, said core body having a passage extending therethrough, a valve member cooperating with said seat, a valve pin ex.- tending from said valve member through the passage in said core body, and a head on said valve pin normally closing the outer end of the passage through said core body, said passage being enlarged inwardly of its extremity so that when said head is depressed air may fiow therearound, said core body having diametrically opposed slots adapted to receive a tool for threading said body into and out of operative position in said container and said head having ribs slidable in but substantially filling said slots and said head having a transversely extending kerf whereby said core body may be rotated from said head by a tool engaged in said kerf.

9. In a rubber valve stem of the capless type, in combination with means interiorly threaded to .receive a valve core, a valve core adapted to be threaded into position and including separable outer and inner members, said outer member being provided with exterior threads and said inner member providing a valve seat, a valve member cooperating with said seat, a valve pin extending outwardly through said members, a

head on said pin normally filling the outer extremity oi the passage in said first named mem- 4 her, said passage being enlarged inwardly of its outer extremity to permitair flow around said head when said head is depressed, and a spring for urging said head into passage closing position, said outer member being provided with slots adapted to receive a tool for rotating said memher,- and said head having corresponding ribs slidable in but substantially filling said slots.

10. In a rubber valve stem of the capless type, in combination with means interiorly threaded to receive a valve core, a valve core adapted to be threaded into position and including separable outer and inner members, said outer member being provided with exterior threads and said inner member providing a valve seat, a valve member cooperating with said seat, a valve pin extending a transversely extending keri whereby said outer member may be rotated from said head when a tool is engaged in said keri.

HENRY Z. GORA.

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