US2202211A

US2202211A - Valve construction

Info

Publication number: US2202211A
Authority: US
Publication date: 1940-05-28
Anticipated expiration: 1957-05-28

Description

y 28, 1940! E. M. mm 2,202,211

' VALVE CONSTRUCTION Filed Aug. 10, 1939 l6 Fig.2.

lnnTOT.

ElmerMKhng WMW2W A Patented May 28, 1940 UNITED STATES PATENT OFFICE Application August 10,

6 Claims.

This invention is an improvement upon the general type of valve construction disclosed in the patent to Crandall, No. 1,493,149, granted May 6,- 1924. Valves of this type are extensively used as foot valves in connection with gasoline pumps. For that purpose the device is threaded to the end of a pipe leading from the reservoir or main supply of gasoline to the gasoline pump and is located at or near the bottom of the gasoline reservoir. These devices are constructed of bronze of a moderate grade suitable for articles of this type. This material is used because it may be easily cast and then the valves and valve seats easily worked to form a close fit. It is highly important that the valve heads and valve seats be accurately ground and that they continually maintain their cooperative relation because gasoline, or similar liquids, leak quite rapidly past the valve if this close fit is not maintained.

These .valve constructions, however, are subjected to more or less rough handling particularly when screwed to or unscrewed from the pipe and not infrequently the casing .body under the strain of the wrench is distorted and as the valve seat is an integral part of the casing body the relation between the valve seat and the valve head is distorted, thus causing a leak.

It is the object of the present invention to provide a construction which will enable valve constructions of this type to withstand the rough handling to which they are thus subjected without disturbing the proper relation of the valve heads and valve seats.

It is a further object of the invention to provide a construction which will limit the opening movement of the valves without the presence of any parts likely to become loose or separated from the structure while at the same time enabling the valve heads readily to be removed and replaced when required.

These and other objects and features of the invention will appear more fully from the accompanying description and drawing and will be particularly pointed out in the claims.

In the drawing:

Fig. 1 is a side elevation of a double valve construction embodying a preferred form of. the invention.

Fig. 2 is a view, chiefly in central vertical cross section, of the construction shown in Fig. 1.

Fig. 3 is a bottom plan View of the head piece shown in Figs. 1 and 2.

Fig. 4 is a detail, partially in central vertical cross section, of the upper end of a construction embodying another form of the invention.

1939, Serial N0. 289,411

As already pointed out, the valve construction illustrated is designed to be used in connection with a fluid-conveying pipe and particularly in connection with a pipe which leads from the reservoir to the pump of a gasoline-handling appa- 5 ratus, such as employed in filling stations. This valve construction is intended to be placed on the bottom of the pipe leading from the reservoir and to stand in said reservoir. While the present invention in its broader aspect is not restricted to 10 the number of valves and one may be suflicient, usually two are provided with the'guides for both valves below the valve heads to insure that the valves always seat properly to prevent backward flow into the reservoir.

A preferred form of valve construction embodying this invention comprises a one-piece cylindrical casing I, cast from bronze'of a moderate grade suitable for an article of this type, a head piece 2 with which the invention is more particularly concerned, and preferably a cap 3 threaded to and closing the lower end of the casing body.

Within the casing, in the form illustrated, are upper and

lower valve seats

4 and 5 spaced from 25 the inner wall of the casing by being formed, respectively, upon the cylindrical webs 6 and I integral with but extending upward, concentric to, and spaced from the casing body, thus to minimize the transmission thereto of any strain im- 0 parted to the casing body. The upper valve head 8 is provided with a stem 9 having a telescoping fit in and in axial alignment with the stem In of the lower valve H. The stem l0 projects upward from the valve I l and also downward and is guid- 35 ed in an opening in a transverse web l2 integral with the side Wall of the casing body. The upward movement of the lower valve is preferably limited by a nut l3 screwed on to a reduced lower end of the stem II and locked in place by a cotter pin. .The upper valve seat 4 is sufficiently larger than the lower valve head' H to enable both valves to be placed in position and removed through the upper end of the casing body.

The lower end of the casing body, as already 5 pointed out, is preferably closed by the cap 3 and the entrance for the fluid is provided by openings I4 formed in the side Wall of the casing body. A reticulated strainer l5, of wire mesh or other suitable material, protects the openings and 50 is conveniently held in place between the cap l3 and the web l2.

In the present invention a head piece, such as shown at 2, is provided as a separate element and is composed of a malleable ferrous, either 5 cooperating with a wrench, having means for iron or steel, casting. This head piece is constructed to secure novel and important functions in this type of valve construction. By reason of the material of which it is made, it will not crack nor will it transmit deleterious strains to the casing body. At its lower end it is threaded into the casing body Well above the cylindrical web 6 and at its upper end it is provided at 16 with an exterior surface, preferably polygonal, for cooperating with the wrench, so that when the entire construction is screwed onto or unscrewed from the main pipe, there will be no danger of the wrench being applied directly to the casing body with injurious results. Furthermore, this head piece at its lower end projects into the path of the upper valve head and thus acts to limit the opening movement of the upper valve without the presence of any parts likely to become separated or to work loose. For this purpose, in the construction shown in Fig. 2, the lower end of the head piece is shown provided with a plurality of projections ll extending radially into the path of the upper valve head periphery, while in Fig; 4 it is shown as provided with a narrow transverse web I8. In the latter form, the stem of the upper valve is preferably extended upward at l9 and guides in a guiding opening in the web IB-in axial alignment with the valve seats, a bushing 20 preferably being inserted in the guiding opening.

The head piece is threaded at 21 at its upper end to connect with the main pipe.

Having thus described the invention, What is claimed as new, and desired to be secured by Letters Patent, is:

l. A valve construction comprising a one-piece cylindrical casing body of bronze having a concentric cylindrical web spaced from its inner wall and terminating in a valve seat, a valve head having a stem and cooperating with said 'seat, means'for guiding the stem in axial alignment with the seat, and a head piece composed of a malleable ferrous casting threaded to the upper end of the casing body well above the said cylindrical web, having an exterior surface for detachably connecting it to a conveyor pipe, and

having its lower end projecting into the path of the valve head to limit the opening movement thereof.

2. A valve construction as defined in claim 1, in which the lower end of the head piece presents a plurality of projections extending radially into the path of the valve head periphery.

3. A valve construction as defined in claim 1, in which the lower end of the head piece is provided with a narrow transverse web having a guiding opening in axial alignment with the valve seat and in which the stem of the valve extends upwardly therefrom through said guiding opening.

4. A double valve construction comprising a one-piece casing body of bronze having cylindrical webs spaced from its inner wall terminating in upper and lower valve seats and having a web below the lower valve seat with a valve guiding opening in axial alignment with the valve seats, upper and lower valve heads each having a stem andcooperating respectively with said seats, the said stems telescoping and the lower stem ex tending through said web-guiding opening, and a head piece composed of a malleable ferrous casting threaded to the upper end of the casingabody well above the cylindrical web presenting the upper valve seat, having an exterior surface for cooperating with a wrench, having means for detachably connecting it to a conveyor pipe, and having its lower end projecting into the path of the upper valve head to limit the. opening movement thereof.

5. A double valve construction as defined in claim 4, in which the lower end of the headpiece presents a plurality of projections extending. radially into the path of the upper valve head.

valve extends upwardly therefrom through said.

guiding opening.

ELMER M. KLING.