US1807490A - Valve - Google Patents

Description

May 26, 1931.

W. B. MILNER VALVE F-iled March 29. 1929 1o tected at all times from the fluids Patented May 26:, 1931 ,UNITED' STATES PATENT OFFICE Application filedlarch as, ma Serial in. $50,909.

The present invention relates'especially to hand controlled fluid valves, and has for its' primary object the provision of a lasting and durable valve embodying'a construction and s arrangement of parts whereby the valve head or member may be shifted from a full open to a full closed position, and vice versa, by a quarter turn of the handle and valve stem; whereby the valve stem is housed and proassing through the .valve casing; whereby t e stem packing is protected from the fluids and permitted to act mainly as a cushion tensioning the valve against its seat; whereby the valve head may be quickly and easily adjusted against its seat from the exterior of the valve, and whereby the position of the valve head will be indicated. at all times exteriorly of the casing.

In the accompanying drawings, which illustrates the present invention and forms a part of this specification:

Figure 1 is a vertical longitudinal sect1on taken centrally through the improved valve.

portion of the casing and the associated parts rotatable with the valve stem.

Figures 3, 4, 5 and 6 are transverse sections taken respectively on lines 3-3, 44, 55, and 66 of Figure 1.

Figure 7 is a perspective view of a portion of the casing and the valve stem with the associated parts of the latter exploded.

As best seen in Figure 1, the invention is illustrated in connection with an L-shaped casing 10, to the opposite ends of which the usual service connections are made by means of fittings 11 and 12. Within and across the casing is a web 13 forming u on one face a valve seat and connected axially with the other face of this web is a bracing tube 14 disposed normal to the web between the latter and the upper portion of the wall of the casing. The opemng through this tube extends continuously through the web 13 and also through the wall of the casing and the neck 15 rising exteriorly of the casing in line with the tube.

Seated against the web or seat 13 is a flat valve disk' or' head 16, fixed upon the lower Figure 2 is a fragmentary side view of areceive thereagainst t end of a. valve stem 17, and as shown best in Flgures 3, and 6, and b a comparison of these figures, the web 13 an valve disk or head 16, are resgectively provided with diametrically o pose segmental openings 18 and 19, so t at it is thus apparent the stem 17 need be glven but a quarter turn in order to either aline the o enings 18 and 19 in the full open posltion o the valve or disaline the openings 1n the full closed position of the valve.

It will, furthermore, be noted that the openings 18 and 19 are spaced radially beyond t e lower open end of the tube 14, so that the valve disk or head 16, or more particularly that portion thereof immediately around the stem 17 serves to close the lower end of the bracing tube'at all times in order to prevent the entrance of fluids around the valve stem.

The valve stem 17 is thus housed and protected atall times, and it will be noted that the upper end of this stem rising through thecounterbored neck 15 of the casing has a threaded portion 20 and a short key slot 21, the latter receiving the inwardly rojecting tangs 22 and 23 respectively of t e controlling ring 24 and indicating cap 25.

In t e counterbore of the casing neck 15 packing 26 is seated beneath a gasket 27, an the latter projects slightly above the neck to 24. This ring 24 has a portion of its periphery cut away to form aced shoulders 28, and the neck ortion 15 0 the casin has an upstanding ug 29 against which t e shoulders 28 of the controlling ring 24 engage in the two positions of the valve disk or head, that is, the full o en and full closed positions previousl re erred to. v

The in icating ca 25, which seats downwardly on the contro ling rin 24, is flanged to telescope the upper end of t e casing neck 15 and thus conceal from view the controlling ring 24 and the lug 29, and its flange has a depending pointer or indicator 30, which in the two positions of the valve previously referred to, points to the words Open and Closed suitably inscribed u on the gxterior of the casing, as shown in igure e stem controlling ring A handle 31 is secured to the upper end of the stem 17, and the threaded portion 20 of the latter receives a thrust or adjusting nut 32, adjustment of which serves to regulate the pressure of the valve disk or head 16 against its seat. It is obvious in this connection that a the nut 32 has bearing for this purpose upon the packing 26, through the indicating cap 25, controlling ring 24 and gasket 27, and this bearing upon the packing 26 and through the latter against the casing, serves to cushion and tension the valve disk or head against its seat at all times.

It is furthermore obvious that in the construction and arrangement proposed by this invention, the relation of the parts as pre viously described whereby the lower end of the bracing tube 14 is closed, serves to protect the packing 26 from the fluids passing through the valve casing, so that this packing will last practically indefinitely to perform its "main function in connection with the cushioning of the valve disk or head.

It is plain that under the above circumstances, the parts of the improved valve set forth will be subject to but slight wear and deterioration in constant use, and the valve as a whole will be lasting and durable for this reason.

What is claimed is A valve including a casing, a web Within the casing forming a -valve seat, a tubular stem housing between the casing and one side of the said seat, a stem extending through said housing, a valve disk secured to the stem against the other side of the seat and closing the inner end of said tubular housing, said casing having an upstanding neck portion around the stem and provided with a counterbore and an upstanding lug, packing within the counterbore around the stem, a ring confined to rotation with the stem, said ring seating on the packing and having spaced shoulders engageable with the lug to limit rotative movement of the stem, a cap also confined to rotation with the stem and having a portion depending around said ring and said neck portion of the casing whereby to close the upper end of said neck, and a tension nut threaded on the stem and having bearing upon the cap and through the latter and said ring, upon the packing.

In testimony whereof I hereunto afl'ix my signature.

WILLIAM B. MILNER.

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