US1292962A - Valve and method of sealing same. - Google Patents

Description

R. W. & A. l. POCOCK. VALVE AND METHOD OF SEALING SAME.

APPLICATION FILED SEPLZS. 19H- Patented Jan. 28, 1919.

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ROBERT W. POCOCK AND AUGUSTINE J. PGCOCK, OF DAYTON, OHIO.

VALVE AND METHOD OF SEALING SAME.

Specification of Letters Patent.

Patented. Jan. 28, 1919.

Application filed September 25, 1917. Serial No. 193,100.

To all whom it may concern:

Be it known that we, Roennr W. POOOCK and AUGUSTINE J. POCOCK, citizens of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Valves and Methods of Seal ing Same, of which the following is a specification.

This invention relates to a new and useful method of sealing the valves against leakage and protecting the sealing medium from loss or displacement during shipment of the pumps and until they have been installed in use. The object of the invention is the producing of a valve which is more certainly secure against leakage than are valves as now commonly constructed, referring more particularly to autoinatie or puppet valves for controlling the passage of liquids more than ordinarily hard to hold, such as gasolene, alcohol, etc. A further object of the invention is to provide means for protecting the sealing medium from displacement or loss during the shipment of pumps containing the valves. This latter specified means includes a method of inclosing the valvesealing medium with a soluble substance until the valve is put into use, after which the soluble material disappears and renders the sealin medium effective for the use intende The accompanying drawings are made up after the manner in which a foot valve might be constructed for use on the lower end of a suction pipe, this however, being only one of the forms which its construction might take and at the same time include the essential features of the improvements. For example, the drawings show a wing valve that is guided in the bore of the seat, this being one form of guiding the valve. So far as the present invention is concerned the manner of guiding the valve is of small importance as is also the form the valve may take. It may be guided from the to and instead of being round as shown it mig t take some other form.

Referring more particularly to the accompanying drawings, Fi re 1 is a vertical sectlonal view of the va ve as a whole, a portion of the strainer as well as the suction pipe being broken away. Fi 2 is a similar section including the strainer, and Fig. 3 is a sectional view on the line 33 of Fig. 1.

In a detail description of the invention similar reference characters indicate corresponding parts in the drawings.

The body 1 of the valve may vary somewhat in design or form from that shown in the drawings provided it retains'the annular pocket 20 surrounding the stationary member of the valve structure which provides a seat. In the accompanying drawings this part is shown as a vertical wall 2 around the passage 3 and the upper end of which provides the valve seat 5. The wall 2 is united to a surrounding horizontal portion 4 which joins the bottom of the casing l and forms the bottom of pocket 20. The wall 2, as before stated, surrounds the passage 3 and extends vertically above and below the bottom 4, and as before stated the upper end of said wall 2 provides a seat for the valve 6. The valve 6 is provided with a downwardly projected skirt of cylindrical portion 7 which incloses the wall 2 when the valve is on its seat as in Fig. 1. Between said skirt 7 and the wall 2 there is an annular space 8 which indicates a clearance when the valve is seated. The valve 6 is of a wellknown wing form, the same being provided with downwardly projected web portions 8 which form guides 9 that engage and slide against the inner surface of the wall 2 in the operations of the valve. The portion of the wall 2 which extends above the horizontal wall 4.- provides the pocket 20 before referred to. The pocket 20 is designed to contain an element for sealing the valve when closed to prevent leakage. This sealin medium or element consists of a metallic fluid 10, such as mercury. The high specific gravity of mercury causes it to remain in the pocket 20 surrounding the valve seat regardless of the flow of lighter liquids over it when the valve is lifted and in operation. It at the same time prevents impurities of any kind entering or accumulating in the pocket inasmuch as the specific gravity thereof is much higher than that of most materials which might form the in1- purities referred to. Referring to Fig. 1 of the drawings, the valve 6 is there shown to be seated with the skirt portion 7 thereof submerged in the mercury. It is impossible for the liquid being pumped to get to the seat of the valve, that is, the point 5 where the valve rests without first driving the metallic fluid or mercury through the seat.

will not pass through small openings readily, the (OllSOtlllCliCU is that it acts as an elfectual stop to theliquidbeing pumped, returning through the valve when it is closed. The top or the merury chamber is partly incloscd by a flange 19 that projects from the inner side of the valve casnig, there being a sutlicient opening 21 for the skirt of the valve to pass through in rising and seating.

Referring more especially to a valve as used in dispensing pumps or tn the foot valve attached to the suction line of such pumps, it will be noted that we provide against accident in shipment, and also against the injury of a valve seat by foreign substances, such as sand, scale or such material being caught 011 the seat as the valve descends. This often occurs from these substances being left in the pipes, tastings or tank, or possibly getting in during shipment. These impurities when the pump has been in action a short time, will be passed on and there is very little danger of damage from this source after the ump has been in use a short time. To guard against this and at the same time to keep the fluid metal in its place during. shipment, we provide a seal over the top of the mercury, which holds the same in place and at the same time supports the valve from its seat, as shown in Fig. 2, until the pump is at in. use. This substance consists of a ho y of wax or paraflin 11 or any material that is soluble under the action of gasolene, or passing liquid. This soluble substance is placed while soft on top of the mercury practically to the height of the valve seat and partially under the inwardly extending rib 19. This completely incases the mercury, and. the soluble material itself for the time being forms the valve seat by means of thesurroundin skirt of the valve resting on it, and being ree to lift and close under the actionof the pump, operating to all intents and purposes as the, valve does while it is coming in contact with the mercury. At the same time, this seat receives all the dirt during the preliminary pumping and a-llows it to pass on. This-soluble material, however, wears away during the cleaning process and in a short time breaks through into the mercury and operates as above described. The valve easing 1 terminates at its upper end in an internally screwthreaded portion 12 which receives a nipple 13, which is provided with a series of projections. 14 that form abnti'nen'ts with which the top .of the valve engages when moving from its seat under the suction created. 15 is a suction pipe connected with the nipple 13 and forming the outletfrom the valve. The lower portion of the valve casingis provided with a frame 16 inclosed by a bot-tom 17 and surrounded by a wire screen l8 through which the gasolene is strained in passing into and through the valve.

It will be readily apparent that the structural details may be more or less varied from those shown and referred to in the foregoing, description without departing from the principles of the invention as embodied in the statement of the scope thereof, and as set forth in-the claim.

Having described our invention,- we claim:

A method of sealing a valve of liquid dispensing pumps and protecting the valve 01- seat from damage in transit and in the initial operation thereof, which consists in placing a sealing fluid of a higher specific gravity than that of the liquid passing through the valve, around the valve seat, and in placing over the exposed surf-ace of said fluid a body of soluble matter which is dissolved by the liquid passing through the valve in its initial operation whereby the sealing fluid. becomes exposed.

In testimony whereof we aflix our signer tures.

ROBERT W. PGGJOCK. AUGUSTINE J. POCOOK.

ca 0! thin patent. may he obtained for five cents eacl by. addressing ;the ,"COIII IflLi ISiMC-E a! Patent! Washington, D, 9s"

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