US560188A - Air-valve for pneumatic tires - Google Patents

Description

.(No Model.) 2 Sheets-Sheet If W. E. BRADNBR.

AIR VALVE POR PNEUMATIG TIRES.

Patented May 19, 1896.

@jf im 2 .Sheets-Sheet 2 l(No Model.) I

' W. 11. 811111111811. V.11111 VALVE P011 811111111111110 8188s. No. 880,188. Patented May 19, 1898.

llNiTED STATES PATENT OFFICE.

VILLIAM E. BRADNER, OF NEVARK, NEV JERSEY.

AIR-VALVE FOR PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 560,188, elated May 19, 1896.

Application filed July 27, 1895. Serial No. 557,313. (No model.)

To @ZZ whom, it may concern.-

Be it known that l, VILLIAM E. BRADNEP., a citizen of the United States, residing at Newark, in the county of Essex and State of New llersey, have invented certain new and useful Improvements in Air-Valves for Pneumatic Tires; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specication.

My invention relates to an improvement in the air-valves for pneumatic tires, making these simpler in construction and securing a greater efficiency of the valve properthat is, in making it more air-tight than any of the hitherto-known constructions and making the said valve less costly in its manufacture. The mechanical means utilized by me in so doing l shall now proceed to illustrate and describe, reference being had to the accompanying drawings, where like letters of reference indicate corresponding parts in the diiierent views, and finally embodying my improvements in the hereunto added claims.

ln Figure 1 is shown an enlarged sectional view of the valve, the pieces being separated from each other for the sake of showing the construction more distinctly, Fig. lA being the cap, Fig. 1B the center part, and Fig. l" the bottom part. Fig. 2 is aview of the middle piece B, containing the inflating-valve proper, relative to which is my invention, showing my improved spring closing the valve on one side only. Fig. 3 is an end view of the middle piece B, showing how the spring lies in a groove cut out in the end of the part B9. Fig. l is a top view of the middle piece in the position it is shown in Fig. l. Fig. 5 is a view of the middle piece B with my improved curved spring closing bot-h air apertures. Fig. G is an end view of Fig. 5. Fig. is a view of the middle piece B with my curved spring closing only one air-aperture- Fig. 8 is an end view of Fig. '7. Fig. 9 is a view of the middle piece B, showing it with two flat surfaces, the outlets coming through these and the springs clasping said surfaces; and Fig. lO is an end view of Fig. 9.

In Fig. l A indicates the cap, screw-cut internally and having an air-tight disk A, made of suitable material, at its base, against which the curved surface C will rest when the pieces A, B, and C are screwed together. The mid` die piece B is furnished with a hollow part B, screw-cut internally, into which the connection of the air-pump will be adjusted when air is injected into the tire, the outside being gnarled to furnish a good catch for the iingers when screwing it into connection with part C, and is at the bottom furnished with a passage B2, admitting air to the tire and terminating either, as shown in Fig. 2, with a single outlet B3 or, as shown in Fig. l, in two outlets B4 and B5.

The part B has a flange B, against which lies an air-tight disk B7, that has, when piece C is screwed onto piece B', the inverted iiange C:s bearing against it. B is screw-cut, furthermore, on the part marked B8 to match the corresponding internal screw cut part of piece C, (marked CT.) The third piece C is screw-cut on the part marked C2 to match the intern al thread in the cap A, and is hollowed out to inclose the middle part B, so that the flexible air-tight disk BT is pressed against the offset or inverted flange marked C8 in C and in the solid part marked C4, furnished with a passage C5, admitting' air into the tire. On the outside O has protrusions C, furnished to retain the stem of the tire, and is secured there by having wire wound around it. There remains now to be described the projection B9 on the middle piece B. This can be either cylindrical or have two ilat surfaces, as shown in Figs. 9 and lO. As before stated, this projection contains the termination of the passage B2, either with a single outlet or a double one, and my improved springs have been constructed so as to cover both cases.

The springF (shown in Fig. l) is furnished with a piece of ileXible air-tight material on each of its prongs F and F2, conically shaped so as to fit into the equally conically-shaped hole or airoutlet, thus forming a regular valve and valve-seat. The spring in passing around the end of projection B is held there by fitting closely against the edges of the groove, and can be secured there, furthermore, if necessary, by a slight overlapping of the edges of the groove, soldering, or like IOO means. IVhere the projection B9 only has one outlet, as in Fig. 2, the spring has only one piece of flexible air-tight material attached to the prong F covering this outlet, While the prong F2 is extended at Will either the Whole length of projection B" or cut o. This construction yields the strongest closing action as regards the valve, and the spring can in this ease be secured either by above -mentioned means in the groove Gr or it can be secured in a side groove on the side of projection B9 opposite to Where the outlet and valve are. My second spring device for closing these outlets is (as shown in Figs. 5 and 0, Where there are two outlets) by a curved spring II, lying around the cylindrical-shaped body of projection IS. As in the case of spring F, this curved spring II is furnished With a conical-shaped piece of air-tight material, fitting into the conical-shaped holes terminating the outlet B"2 in projection B, and the spring is secured, prcferably,by a groove I, lying across the projection B9 between the two outlets, and can be secured there in the same manner as spring F is secured in groove G, by the overlapping of the edges oi groove or other suitable means.

In Figs. 7 and S I have shown the curved spring as applied to a single outlet, the spring lying coiled around the body of projection B9 as far as is deemed necessary, and the same quality is noticeable in the curved spring for one outlet as in the straight spring for one outlet-that of greater strength and consequent tighter closing action.

I do not in either case limit myself to the conicalshaped outlet and corresponding valve, as the piece ot flexible air-tight material may be flat and cover the outlet, as it ordinarily is, even more so, as the iiexible piece will in time conform itself to the aperture, and thus as a matter of fact insert itself gradually into the hole.

Vhat I then claim as new, and desire to secure by Letters Patent of the United States, 1s-

l. In a tire-valve, the combination with a valve-shell, of a stem fitting therein, provided with a longitudinal passage closed at one end, and a lateral passage communica-ting With said longitudinal passage and terminating at each end in the periphery of the stem, and a spring fitted in a slot in the stem and having two arms parallel to the axis of the stem, and a valve secured to each of said arms in position to cover the ends of the lateral passage, substantially as described.

2. In a tire-valve, the combination With a valve-shell, of a stem tting therein, provided With a longitudinal passage closed at one end, and a lateral passage communicating With said longitudinal passage and terminating at one end in the periphery of the stein, and a spring iitted in a slot in the stem and having tivo arms parallel to the axis of the stem, and a valve securedl to one of said arms in position to cover the end of the lateral passage, substantially as described.

In a tire-valve, the combination with a valveshell, of a stem fitting therein provided With a longitudinal passage closed at one end and a lateral passage communicating with said longitudinal passage and terminating' at each end in the periphery of the stein, and a spring iitted in a slot situated at a right angle With the stem, and a valve secured to each end of said spring in position to cover the ends of the lateral passage, substantially as described.

4. In a tire-valve, the combination with a valveshell, of a stem fitting therein, provided With a longitudinal passage closed at one end and a lateral passage communicating With said longitudinal passage and lcer minating at one end in the periphery of the stem, and a spring fitted in a slot situated at a right angle to the axis of the stem, and a valve secured to said spring in position to cover the end of the lateral passage, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this Cth day of July, 1895.

IVILLIAM E. BRADNER.

lVitnesses:

AUG. M. TREsC-fnotv, AXEL HEEREN.

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