US2438360A - Regulator stem seal - Google Patents

Description

March 23, 1948. J. J. DELANY 2,438,360

REGLATOR STEM SEAL Filed Nov. ll, 1944 Patented Mar. 23, 1948 UNITED .STATES PATENT v(,)FFlCl REGULATGR STEM SEAL John J. Delany, Brooklyn, N. Y.,ass ignor to Der larry Realty Corporation, New York, N. Y.. a corporation of New York Application November 11, 1944, Serial No. 562,957

1 Claim. (Cl. 7286-7-26) accessible from the outside of `a casing containing a iiuid under pressure in excess of atmospheric pressure so .as to permit of adjustments of means Within the casing while precluding leakage of uid from the inside of the casing and While not necessarily restricted thereto, the same is ideally adapted for use in connection with flush Valves so as to provide means adjustable from the exterior thereof for regulating the timing or length of the flushing operation without permitting of leakage of water around the regulating mltlls..

The invention broadly eompreliends a device oi vthe indioated eharaeter which is Iextremely simple in its construction and mode of operation which may be inexpensively produced as a part of the apparatus with which it is associated and which electively functions to prevent leakage Without appreciable `wear yand the' neeessity of adjustment to oo rnpensate thereior, ywhile taking the place of more complicated means such as stuing boxes, packing glands and the like which are more expensive and require frequent adjustment as well as replacement of the packing.

More particularly the invention is directed to a device of the character set forth which includes a casing containing a uid under pressure in excess of atmospheric pressure in which the casing is formed with an aperture opening through the inner and outer surfaces thereof with a regulating element fitted therein and adjustable longitudinally of the aperture and having its inner terminal protruding into the casing for engagement with the means to be regulated, wherein the inner surface of the casing surrounding the aperture is formed with a recess with a compressible elastic sealing member having an opening snugly tted over the regulating element and inherently contracted thereabout and arranged within the v`recess for rendering the casing uid tight in the region of the regulating element.

With the above recited and other objects in view, the invention is more fully described in the following specification, particularly pointed out in the appended claim and illustrated in the accompanying drawings` wherein- Fig. l is a side view of a flush valve with parts broken away and equipped with a regulating screw and sealing means therefor constructed in accordance with the present invention.

Ttig. 2 is an enlarged fragmentary sectional view showing the interlitting of the rib and groove of the sealing member prior to the application of pressure thereto.

a detail perspective view of the seal-- member per se. Referring to the drawings by characters of reference, A designates the casing of a diaphragm type nnen valve which is merely illustrative of `one of the :l1-Ses of the invention to demonstrate its prac cal application.. As is usual in this type of iiush valve, the :upper portion thereof Within 4.the cap .section B consti-tutes a Water pressure chamber C .located above the diaphragm valve vmember D. An upper valve element `lll is normally disposed in elosed relation to a v,seat F whichy surrounds; the eentral passageway G through the diaphragm valve rnelnbergD and which upper valve element E is cant-ed and dis- ?Qlaeed from its seat by the engagement of 'the terminal H of a handle J with the actuator stem K fopen :manipulation oi said handle.

Heretofore, regulation of' the length or duration of the flushing .Operation has been set before the valve casing closed and any correction thereto or subsequent regulation thereof has required the removal of the cap section B for gaining access to .the parts for making `proper adjustment.

The .present invention is .directed to meansaecessible from the outside of the casing which contains the fluid under pressure for the purpose of regulating or adjusting the parts within the casing while avoiding leakage and, as illustrated in the present disclosure the removable cap section C is formed with an aperture Ill which is threaded and with which the threaded head I I of a regulating element or screw L is engaged to adjust the same longitudinally of the aperture by turning thereof in opposite directions. The element or screw L is formed with an inwardly directed reduced shank I2 which protrudes into the interior of the casing to perform its function.. In the flush valve, as illustrated, the inner terminal of the shank I2 constitutes an adjustable abutment with which the upper valve element E engages to limit and control the opening of the same with reference to its seat F to thereby regulate the duration of the flushing operation. In order to prevent leakage through the aperture I0 and around the head Il of the screw L a compressible elastic sealing member M is utilized which may be made of rubber 0r any equivalent material and said member is formed with an opening I3 of a size to snugly lit and inherently contract about the shank I2 of the screw L so as to prevent leakage through the opening I3 between the wall thereof and the periphery of the shank. The sealing member or washer M is arranged within a recess M formed in the inner surface of the cap section B of the casing in surrounding relation to the lnner end of the aperture lll and the upper face I5 of the sealing member M is forced into engagement with the inner wall I6 of the recess by the pressure within the casing to prevent egress of the fluid therefrom between the face I5 and said wall I6 of the recess.

If desired, the sealing member or washer M may be provided with an endless rib I1 on its upper face and the inner Wall of the recess with a mating groove I8 to provide a more effective seal.A Preferably the rib I1 as shown in Fig. 2y

is of greater height than the depth of the groove and of lesser width than the width of the groove y so that the uid pressure Within the casing depresses the height of the rib and increases its* Width so as to ll the groove and render the action of the sealing member more eiective in prevent` its inner terminal extending through and protruding from the recess Vinto said casing, a compressible elastic sealing member having an open` ing compressed about the regulating element and `arranged within the recess for preventing leakage through the aperture in the casing, said inner Wall of the recess being formed with an endless groove spaced from andY disposed in surrounding relation toY said aperture therein and ing any leakage between the'face i5 and the inner Wall l B.

Under this construction and arrangementgit isV apparent that turning o f the regulating screw L to adjust the same toward or away from the upper valve E accomplishes the regulation of thelushing operation Without the necessity of opening the valve casing While the pressure with- Yin the casing impinging upon the sealing mem- Vber or Washer M prevents displacement or leakage. It is obvious that Within the scope of the invention the regulator screw'may be employed forV other purposes than that disclosed without departing from the spirit of the invention.

What is claimed is: f In a device of the character set forth, a casing adaptedto contain a fluid under pressure in excess of atmospheric pressure, said casing having ar`ecess in its'inner surface defined by an *innerwall and an angularly related side wall extending inwardly from said inner wall, said recess being formed with an aperture opening at its opposite ends respectively through the outer surface of the casing and the inner wall of the recess, a regulating element tted within and adjustable longitudinally of said aperture with Yiile of this patent:

said sealing element being formed with an endless rib on theface thereof confronting the Vinner wall .of therecess, said rib being of `greater height than'the depth of the groove and of lesser widthA than thewidth of the groove to permit the iiuid pressure within the casing to depress the -height and increase the width of the rib so as toV fill the groove and render theV action of the sealing member more effective.

vJOHN J. DELANY. Y

REFERENCEsCITED- v The following references are of record in the UNITED STATES PATENTS

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