US2482198A - Valve structure - Google Patents

Description

P 1949- J. F. MELICHAR 2,482,198

VALVE STRUCTURE 'Filed Sept. 5, 1944 Y a attorneys Patented Sept. 20, 1949 2,482,198 VALVE STRUCTURE Joseph F. Melichar, Cleveland, Ohio, assignor to The Parker Appliance Company, Cleveland,

Ohio, a corporation of Ohio Application September 5, 1944, Serial No. 552,798

" Claimsf (01151-125) The invention relates generally to'valve structures and primarily seeks to provide certain new and useful improvements in the construction and arrangement of the valve seat and the cooperating seat sealing means movable into and out of contact with the seat for preventing or permitting flow of fluid therethrough.

An object of the invention is to provide a valve structure including a simple flat seat, and a valve member movable toward and from said seat and having a yieldable sealing member engageable with the seat around a flow port therethrough and an annulus engageable in non-yielding contact with the seat after a predetermined deformation of the yieldable sealing member.

Another object of the invention is to provide a valve structure of the character stated in which the yieldable sealing member includes a rubberlike ring portion projecting toward the seat, and

the non-yielding annulus includes an outwardly flared portion closely surrounding said ring portion.

Another object of the invention is to provide a. valve structure of the character stated in which the sealing member and the non-yielding annulus are mounted as check valve means on a carrier which is swingably mounted in the valve casing.

Another object of the invention is to provide a valve structure of the character stated in which the sealing member and the non-yielding annulus are securely clamped together and together have a loose mounting on the swingably mounted carrier designed to facilitate efficient seating engagement of said member and annulus.

Another object of the invention is to provide a valve structure of the character stated in which the seat, the sealing member, the non-yielding annulus and the carrier member are mounted on and removable with an end member threadably mounted on the valve casing and in which the seat is formed in a recess effective to house said sealing member, annulus and carrier and protect them against damaging contact when the end member is removed from the casing.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims, and the several views illustrated in the accompanying drawing.

In the drawing Figure 1 is a central longitudinal sectional view of a valve structure embodying the invention, the valve being shown open.

Figure 2 is a fragmentary longitudinal sectional view illustrating the valve in the normally closed position.

Fi ure 3 is a vertical cross section taken on the line 3-3 on Figure 2.

Figure 4 is a view similar to Figure 2 illustrating the valve seated by pressure sumcient to deform the ring portion of the sealing member.

Figure 5' is an enlarged fragmentary view illustrating the movable valve member in the partia ly assembled state prior to the upsetting of the rivet Figure 6 is a view similar to Figure 5 illustratin the valve member in the fully assembled condition following the'upsetting of the rivet.

Figure 7 is a fragmentary sectional view i lustrating a slight modification of the movable valve member in which a sealing ring is interposed between the rivet head and the circular plate or flapper.

In the example of embodiment of the invention herein disclosed. the improved valve structure includes a generally cylindrical casing 5 having a flow port 6 in one end thereof in an enlarged cylindriform valve chamber 1.

The casing 5 is internally threaded as at 8 at the end thereof Opposite the port 6 for threadably receiving an end plug 9 equipped'with a flow port I'll which is axially aligned with the flow port 6 and the center of the casing 5. A sealing gasket H is interposed between the plug 9 and the end of the casing 5 so as to prevent leakage at this point, and this sealing ring may take the form of a flattened 0 ring.

The threadably mounted plug 9 has its inner end counterbored as at I! so as to provide a flat seat I3 which surrounds the port l0 and is disposed in a plane normal to the axis of the casing and its ports 6 and ill. The counterbore 12 provides an annular wall i4 projecting inwardly from the plug 9, and this wall is cut away as at H: and

IE to provide two parallel spaced hinge lugs I! through which a hinge pin I8 is inserted. It will be observed by reference to Figure 3 of the drawing that the lugs I! are disposed so close to the adjacent wall portions defining the casing chamber I when the plug 9 is properly inserted in said casing that the pin I 8 cannot become inadvertently displaced from its mounting in the lugs 11. I

The hinge pin l1 serves as a pivotal mounting for a carrier arm or flapper l9, and the arm I9 is cut away as at 20 to accommodate a torsion spring 2| which is coiled'abou't the pin Hi wi h one end thereof engaging the plug as at 22 and its other end turned at a right angle and engaging the inner face of the carrier arm or flapper l9 in the manner clearly illustrated in Figure 3. The pressure of the right angularly turned end 23 of the spring against the member l9 tends to maintain the desired parallel re ation of said member with the axis of the pivot pin l8 and the seat I 3.

The carrier arm or flapper. Isis provided at i free end with an aperture of a size for loo ely receiving a hub extension 24 from a circular D."tc or flapper member 25. It will be apparent by member 25 also is equipped with an outwardly projected central hub 21, and this hub is encircled by a flat rubber-like ring II which lies flat against the adjacent face of the member 25 and includes an endwise turned peripheral ring portion a dimensioned toproject slightly beyond the annulus I of the flapper member 25 in the manner clearly illustrated in Figures 1, 2, and 6. A clamping washer It lies against the face of the sealing member 20, and I. headed rivet ll passes through the aligned apertures in the flapper member 25 and said washer in the manner clearly illustrated in Figure 5. In the assembling of the swingably mounted valve element, said rivet, after being inserted in the manner illustrated in Figure 5, is upset as at I! so as to tightly clamp the washer ll against the sealing member and the hub 21 of the flapper member 25, thereby to securely clamp the sealing member to said member 25 in the'manner clearly illustrated in Figure 8.

In Figure 7 of the drawing, there is illustrated a slight modification of the invention in which a sealing ring 33 is interposed between the head of the rivet and the flapper member. Such a sealing ring will assure the projection of a tight joint .such as will prevent leakage centrally through the swingably mounted valve member, although it is not generally necessary to provide this extra sealing means because when the assembly is properly riveted, the rivet expands into tight metal to-metal engagement in the flapper member bore. It will be apparent by reference to Figure 1 of the drawing that when the valve is in the open condition illustrated in Figure 1, the swingably mounted valve member is entirely clear of the central passage through the valve and offers no interference to free passage of fluid through the casing. when the valve is closed normally,

minus of the flapper II readily permits the derormation or sprerv ling of the ring portion 29 and the non-yielding annulus 26 will come against the seat i3 in non-yielding seating contact, without any tendency on the part of said'annulus to p nch or snip the yieldable sealing member ring portion 29. I 1

The loose mounting of the flapper hub 24 in the aperture of the carrier or flapper arm I! provides a self-aligned mounting for the port sealing valve element structure.

The flat seat ll hereinbefore referred to may be formed with a flat bottom drill. When thus formed any irregularities in the seat surfaces will constitute concentric hills and valleys and the yieldable ring portion 28 of the sealing member can be readily deformed to establish a perfect sealing contact with said seat.

It will be noted by reference to Figures 2 and 4 of the drawing that the hinge pin it is spacedaway-from the seat I! so as to be disposed approximately in line with the center of gravity of zhe flapper or valvezelement assembly so that when said assembly is properly installed with the hingev at the top as shown in said figures. only the sprii g pressure is eil'ective in seating said assembly. It should be understood also that the spring pressure is suillcient to complete the flapper or valve element assembly seat, even though the valve structure may be installed in a vertical position wherein the weight of the valve element assembly would tend to unseat the same.

It will be observed by reference to Figure 2 of the drawing that when the movable valve member is seated, the annular wall ll projects around the same as a sort of protective housing. It will therefore be apparent that when the threadably mounted plug 0 is removed'from. the casing, said projecting wall portion It will protect the seated valve member against damaging contact with any supporting means upon which the plug might be placed or other devices which might damage said valve means.

While a particular form of the invention has been shown for'purposes of illustration, it is to be clearly understood that various changes in the details of construction and arrangement of parts may be made without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. In a valve, a casing having a port therein] and a seat surrounding. said port, and means for controlling passage of fluid through the port and comprising a member movable toward or from said seat, a yieldable sealing member having a thick ring portion presented for engagement with the seat and over said port, a nonyielding annulus concentrically surrounding said ring portion and movable with said movable member and engageable with said-seat after a predetermined deformation of said ring portion against said seat, said sealing member including a thin flat ring body portion extending inwardly fromits seat engageable ring portion, said non-yielding annulus being part of said movable member, said movable member having a center hub portion extending from both faces thereof, a carrier arm, means pivotally supporting said carrier arm, one of said hub extensions having a loose connection with the carrier arm and the other said hub extension serving as a. mounting for the sealing ring, and a clamping washer engaging the said other hub extension, and overlying the sealing ring flat body portion for holding said ring against the movable member and rivet means passing through the washer, the movable member and the carrier arm for holding these three parts and the sealing ring in assembly.

2. In a valve, a longitudinal casing having a generally cylindriform chamber therein and a flow passage in one end, a plug remoyably mounted in the other end and having a port therethrough axially aligned with the flow passage and a flat seat disposed perpendicularly faces thereof, one said hub having a loose connection with the carrier arm, and the other hubserving as a mounting for the sealing ring, a washer overlying the ring flat body portion and contacting the adjacent hub, and rivet means passing through the washer and the hubs and loose mounting of the flapper on the carrier arm for holding the ring, the washer, the flapper, and the carrier arm together, said rivet being disposed to be engageable with the casing in the chamber to limit opening movement of the carrier with the ring disposed in a plane approximately paralleling said axis.

3. In a valve, a casing having a port therein and a seat surrounding said port, and means for controlling passage of fluid through the port and comprising a member movable toward or from said seat, a yieldable sealing member having a thick ring portion presented for engagement with the seat and over said port, a non-yielding annulus concentrically surrounding said ring portion and movable with said movable member and engageable with said seat after a predetermined deformation of said ring portion against said seat, said sealing member including a thin flat ring body portion extending inwardly from its seat engageable ring portion, and a clamping washer overlying said flat ring body portion and attached to the movable member for securing the sealing member thereon, said thin flat ring body of the sealing member forming a well within the thick ring portion within which the washer is protectively confined, said sealing member and the non-yielding annulus being securely clamped together by said clamping washer, a carrier swingably mounted in the casing, means providing a loose, self-seating mounting for the sealing member and non-yielding annulus on said carrier, said seat and port and the swingable carrier all being carried on a casing end plug threadably mounted in the casing and having an annular wall projecting about and protecting the carrier, the sealing member and the non-yielding annulus against damaging contact when the sealing member is seated and the plug is removed from the casing.

4. In a valve, a casing having a port therein and a flat seat surrounding said port, a carrier arm swingably mounted in the casing, a flapper having a peripheral flange of a diameter greater than that of the port and flared toward said port and axially aligned therewith when the flapper is opposing the port, a sealing ring carried by the flapper, said ring including a thick ring portion presented for engagement with the seat over said port and disposed just within the flange flare and a thin flat ring body portion extending inwardly from said thick portion, said thick ring portion projecting axially a limited distance beyond the flange so that the flange can engage said seat only after there has been a degree of compression of said thick ring portion against said seat, a hub extension on said flapper having a looseconnection with the carrier arm, said flapper having another hub extension on its opposite side approximating in thickness the thickness of the thin ring body portion, a washer secured to said last mentioned hub extension and .overlying the thin ring body portion to hold the ring in place, said thick ring portion in normal condition being spaced radially from said flange flare and from the periphery of said washer, said flange flare allowing freedom for the sealing ring to spread when pressed by high pressure against the seat thereby to permit the flange to engage in nonyielding seating contact with the seat, and fastening means passing through the flapper and washer securing them together and to the carrier arm.

5. In a valve, a casing having a port therein and a flat seat surrounding said port, a carrier arm swingably mounted in the casing, a flapper carried by said arm and having a peripheral flange of a diameter greater than that of the port and flared toward said port and axially aligned therewith when the flapper is opposing the port, a sealing ring carried by the flapper, said ring including a thick ring portion presented for engagement with the seat over said port and disposed just within the flange flare and a thin flat ring body portion extending inwardly from said thick portion, said thick ring portion projecting axially a limited distance beyond the flange so that the flange can engage said seat only after there has been a degree of compression of said thick ring portion against said seat, said flapper having a hub approximating in thickness the thickness of the thin ring body portion, a washer secured against said hub and overlying the thin ring body portion to hold the ring in place, and spring means yieldably urging the carrier arm, the flapper and the sealing ring toward the seat, said flange flare being spaced slightly from said thick ring portion thereby allowing freedom for the sealing ring to spread when pressed by high pressure against the seat thereby to permit the flange to engage in non-yielding seating contact with the seat, said casing port being formed in a plug threadably mounted in one end of the casing and said seat constituting the flat bottom of a counterbore formed in said plug and resulting in provision of an annular wall projecting axially-inwardly beyond said seat and having portions thereof cut away to provide spaced parallel lugs between which the carrier arm is swingably mounted, thereby to place the carrier arm, the flapper and the sealing ring normally within the protecting compass of said annular wall, and said carrier arm being swingable freely out of said annular wall into position for disposing the sealing ring in an open position paralleling the axis of the casing port.

JOSEPH F. MELICHAR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 226,059 Gillette Mar. 30, 1880 286,676 Belknap Oct. 16, 1883 483,635 Prince Oct. 4, 1892 1,286,672 Lindgren Dec. 3, 1918 1,510,860 Peck Oct. '7, 1924 1,707,017 Kibele Mar. 26, 1929 1,932,348 Long Oct. 24, 1932 2,021,532 Wainford Nov. 19, 1935 2,107,2(10 Kennon Feb. 1, 1938 FOREIGN PATENTS Number Country Date 6,424 Great Britain May 1, 1888 12,911 Great Britain June 7, 1904

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