US511693A - Thz natiokal umoqfmphlnq - Google Patents

Description

(No Model.)

W. K. GENET. AIR VALVE FOR PNEUMATIC TIRES.

No. 511,693. Patented Dec. 26, 1893.

I LVMvwoaw I WASHINGTON. a. c.

UNITED STATES PATENT @FFMIE.

WVILLIAM K. GENET, OF NEXV YORK, N. Y., ASSIGNOR TO DAVID M. COOPER,

. OF IVASHINGTON, DISTRICT OF COLUMBIA.

AIR-VALVE FOR PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 511,693, dated December 26, 1893.

Application filed May 8,1893- Serial No. 473,463. (No model.)

To ctZZ whom it may concern.-

Be it known that I, WILLIAM K. GENET, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Air-Valves for Pneumatic lVheel-Tires and other Purposes, of which the following is a specification.

The air valve in which my invention is comprised is adapted to be used with any inflatable article. But it has been designed by me with more particular reference to use on a pneumatic wheel-tire, and it is in that connection that I shall describe it. It is a valve in which the air is prevented from escape by means of a contractile sleeve of rubber or other elastic or extensible material fitted over or upon a plug or nipple, which latter is usually perforated for the entrance of air. This feature I am aware is old and common property broadly considered.

Myinvention consists in the particular construction and organization of parts which will be first described by reference to the accompanying drawings, and then will be more particularly pointed out and specified in the claim.

In the accompanying drawings Figure 1 is a perspective view of the valve complete. Fig. 2 is a vertical axial section in the plane of the inflating opening and auxiliary cap for closing the same. Fig. 3 is a like section of a modification.

Like reference letters indicate corresponding parts in all the figures.

A is the tubular valve case to be secured to the article to beinfiated in such manner that its inner end shall open into or be in communication with the hollow interior of the article. In the case of a pneumatic tire, this case will be embedded in the rubber material of which the air tube orpneumatic tube is composed, while that material is in plastic condition and will then be secured in place by and during the operation of vulcanizing said tube, as will be understood by those skilled in the art of rubber manufacture without further explanation. To insure its firm and solid union with the body of the rubber tube, the case A has at its inner end a skeleton flange or base A upon and around which the rubber is molded-entering also the openings or spaces a between the ribs of the'base. Experience has demonstrated that if the base or flange A be solid and continuous small air lanes or passages are sometimes left between the rubber and the flange, in vulcanizing the rubber about the flange, which of course is fatal to the tire. But by providing the openings a the rubber above and below the flange will meet and become firmly united through these openings, thus rendering the formation of air lanes or passages quite impossible.

The case A at its upper end is externally screw threaded, to receive the main cap B which isinternally screw threaded and screws upon the case as indicated in Fig. 2. To the inside of the head of the cap is secured the plug or nipple D which may be formed in one with the cap, or can be secured thereto in any suitable way. In this plug is formed a cen tral air passage Z) which terminates short of the inner end of the plug in a cross-passage 1) opening out through the sides of the plug. The air passage 1; is continued up part way through the head of the cap B, but before reaching the top or outer end of the latter makes in the valve structure shown in Figs. 1 and 2 a bend at right angles, so as to emerge from the side of the cap. This passage is closed by an auxiliary screw stopper 0, which in Figs. 1 and 2 has the form of a small cap which screws upon a laterally projecting tubular nozzle B in which the passage 1) termi.

nates. In Fig. 3 the stopper 0 has the form of a plug which screws directly into the side of tlhe cap Bthe nozzle B being dispensed wit The opening closed by the main cap is the deflating opening, and that closed by the auxiliary cap is the inflating opening-that is to say the opening to which the pump used for inflating the tire is coupled; and the relative arrangement of these two caps is material in that under it, there is not that liability to unscrew the main cap when unscrewing the auxiliary cap which exists in some types of air valves now in extensive use. In my valve also the plug D is in one with the main cap; so that both of them must move together, and the plug will be carried at all times by the cap. The plug is surrounded by the rubber tube E which forms a contractile sleeve fitting closely the exterior of the plug.

It automatically closes the passage 19 against escape of air, but will expand when air is forced in, so as to permit the air from passage b to pass between it and the body of the plug. The sleeve will be secured to the plug'in any convenient and suitable way; in this case it is held by being stretched over an annular rib c on the plug.

On the inner face of the head is a washer d to make an airtight joint when the main cap is screwed down home upon the case.

Having described my improvement, what I claim as new, and desire to secure by Letters Patent, is-

WILLIAM K. GENET.

Witnesses GEORGE SHEAEM AN, E. SEYMOUR.

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