US1293840A - Valve. - Google Patents

Description

Patented Feb. 11, 1919.

E. A; McL EOD & M. F. QUIRK.

. VALVE. APPLICATSON mwxuuz 21, 91a.

With new Maw 4 EDWARD A. MOLEOD AND MICHAEL F. QUIRK, OF SPRINGFIELD, OHIO, ASSIGNORS OF ONE-THIRD TO HARRY QUIRK, OF COLUMBUS, OHIO.

VALVE.

Specification of Letters Patent.

Patented Feb. 11, 1919.

Application filed June 27, 1918. Serial No. 242,155.

To all whom it may concern:

Be it known that we, EDWARD A. MoLEoD and MICHAEL F. QUIRK, citizens of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Valves, of which the following is a specification.

Our invention relates to improvements in valves, and the object of the invention is to provide a valve construction which will obtiate the employment of packing about the valve stem.

A further and more specific object of the invention is to provide an arrangement in which ground, close fitting metallic faces are employed for the purpose of preventing leakage about the valve stem, which arrangement will be one of very simple and effective construction.

In the accompanying drawings,

Figure l is a vertical section of a valve casing and its stem showing our improvements, the valve being in-closed position.

Fig. 2 is a vertical section of the valve stem and valve, together with the plug or bonnet which supports the same, the valve being shown in open position.

Fig. 3 is a bottom plan view of the valve proper and its guide.

Referring to the drawings, 1 represents the valve chamber or casing having the usual valve seat 2. The valve proper is represented by 3 and is so fitted to the easing as to prevent its turning. The lower end of the valve stem 4 is threaded into the valve 1 3 so that when the stem is turned the valve will be raised or lowered in a well known way. Threaded into the upper portion of the casing 1 is a bonnet or plug 5 which is in the present case provided with a cap 6. The valve stem 4 extends through and is supported by this plug 5 and is provided with two integral collars 7 and 8 having ground beveled edges 9 and 10 which seat against ground beveled surfaces 11 and 12 on the interior of the plug 5. That portion 13 of the valve stem 4 just beneath the collar 8 is enlarged slightly and is fitted snugly to the reduced bore of the plug. The stem is fitted to the plug and held in position by the nuts 14 and 15, a spring lock washer 16 being preferably employed be tween the nut 14 and the plug. A rod 17 extending downwardly from the plug through an aperture in the valve 3 acts as a guide for the valve in its raising and lowering movements.

By the construction described, a very simple form of valve mechanism is provided in which the necessity of packing or gaskets is obviated and which may be easily and readily assembled or taken part. In assembling the device the stem is first inserted into the plug 5 and adjusted to position therein by the nuts 14 and 15, the adjustment being such that the ground surfaces of the stem and plug are held in close contact but permitting the ready turning of the stem in the plug. It has been found that these ground surfaces when properly adjustednot only prevent the leakage of liquid about the valve stem but also act just as effectively with gas.

Further, by reason of the fact that the beveled surfaces of the collars and of the plug are tapered toward the interior of the casing, it is possible to nicely adjust the stem 4 in the plug so that there will be no undue friction between the beveled surfaces by reason of the pressure of the fluid, the spring lock washer 16 serving to hold the beveled surfaces in proper contact with each other after the parts have been properly adjusted by the nuts 14 and 15.

Having thus described our invention, we claim 1. In a valve, a main casing, a removable plug secured to said casing having an interior beveled ground surface, a valve stem extending through said plug having a beveled ground surface fitted to the ground surface of said plug, said beveled surfaces being tapered toward the interior of said casing, and means on said stein for adjusting and holding the same to position in said plug, said means being located at the inner end of said plug.

2. In a valve, a main casing, a removable plug secured to said casing having an interior beveled ground surface, a valve stem extending through said plug having a beveled ground surface fitted to the ground surface of said plug, said beveled ground surfaces being tapered toward the interior of said casing, a valve having a screwthreaded connection with the inner end of said stem and held from rotation, and a nut on said stem arranged to adjust and hold the casing, a nut on the stem, and a Spring same to position in said plug, said nut being Washer interposed between said nut and located at the inner end of said plug. plug, said nut and asher serving to adjust 3. In a valve a main casing, a removable and hold said stem in position in said plug.

5 plug secured to said casing having an in- In testimony whereof, We have hereunto 15 terior beveled ground surface, a valve stem set our hands this 24th day of June, 1918. extending through said plug having a bev; EDWARD A. MoLEOD. eled ground surface fitted t0 the ground MICHAEL F. QUIRK. surface of said plug; said beveled surfaces Witness:

10 being tapered toward the interior of said CHAS, L WELOH.

Copies of this patent may be obtained for five cents each, by addressing the QQmmi SSiOQBI of Iatents, Washington, I). Q.

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