Патент USA US2122189код для вставки
«Fume 2» i933» M. WARD ' ` 2,122,18 FLUSH VALVE Filed Nov. 1o, 193e INVENTOR M/CHA¿ WA „l B ` ‘1.4, eV " 2,122,189 Patented June 28, 1938 ATENT GFFICE UNITED STATES 2,122,189 FLUSH VALVE Michael Ward, South Orange, N. J. Application November- 10, 1936, Serial No. 110,055 2 Claims. (Gl. 137-93) The upper portion of the wall 6 isv provided This invention relates to ñush valves and deals more particularly with the diaphragm type of valve known as flushometer valve and is an improvement on the structure shown in my ap plication filed December 3, 1935, Serial No. E) 52,626. 10 with an inreaching annular flange I2, Yand there above, said wall is internally screwthreaded as at I3. Fitted to the body, there is provided a cover Ol member I4 provided with external screw threads ' I5 for engagement with the threads i3. To in The invention contemplates the provision of an economically constructed, simple, and posi tive acting valve comprising few parts which are sure a leak-proof ñt between the body and its cover member, a gasket, such as shown at I6, readily and quickly assembled. may be provided. Another contemplated feature of the inven tion resides in the no-vel construction of the auxiliary tilting valve employed in the device. A further contemplated feature resides in the main valve being integrally formed with the clamp the peripheral portions of a-fiexible dia seat for the auxiliary tilting valve. _ The invention has for its further object the provision, of novel means for equalizing the pressures in the chambers to each side of the diaphragm. A still further vobject resides in the provision of syphon preventing means to obviate the; possi bility of back-syphonage from the sewage system toV the fresh water supply» and thus effectively . preventing contamination.. With the foregoing features and objectsv in mind and many others which-Will later become' apparent, the invention resides in the novel con structional details and in their novel combina 30 tion and arrangement as illustrated in the. ac companying drawing in which is depicted an embodiment of the invention as at present. con templated. In the drawing: Fig. 1 is a vertical cross-sectional View through a flush valve showing therfeatures of the inven tion. Fig. 2 is a transverse sectional view through the main valve sleeve. Fig. 3 is an enlarged fragmentary sectional de 4:0 35. 10 r The cover I4 is formed with an annular ring surface Il which coacts with the flange I2 to phragm I8, and in order to obtain a tight grip ping of the diaphragm, the cover is provided with a polygonally-shaped head I9 for accom modation of a wrench or other like tool. The lower portion of the cover I4, adjacent the surface I1, is reduced in diameter so that an annular chamber 29 is formed between the threaded portion of the body and the mentioned lower portion Vof the cover. Beyond the periph eral edge of the diaphragm I8, the flange I2 is formed with a bleed hole 2I which thus com municates the chamber 8 with the annular 25 chamber 20. , . The mentioned reduced portion of the cover I4 is provided with a horizontal bore 22 in which is fitted a cylindrical plug 23 having a central bleed hole 24 and provided with a rounded teat 25 projecting into the chamber 2B. Projecting into the chamber 26 formed between the cover I4 and the diaphragm, there is provided a ball cage 21 having a shank 28 also ñtted into the bore 22. The cage is provided with a freely mov 35 able ball valve 29, a valve seat 30, a passage 3l connecting the cage chamber with the bleed hole 24, and a port 32 communicating the cage chamber and the chamber 26. This assembly may have any angular disposition with respect 40 tail View showing the improved syphon breaking' to the bleed hole 2l. means. The main valve sleeve 33 is formed with a valve portion 34 having a sliding fit in the up Fig. 4 is a similar-view> of an alternate _form of pressure equalizing means. Describing the invention, as embodied 'in the 4.5 drawing, in greater detail, the body 5 is pref ‘erably of cast metal and is formed with an outer circumferential wall Ii and an inner wall 1 con K per portion of the wall ‘I and with three guide members 35 which afford equalized guiding of the valve sleeve in its movement within the sleeve wall "I, The upper portion of the valve sleeve is reduced in diameter as at 36 and over centrically disposed therein to provide an annu 50 lar chamber 8 therebetween and a flow passage this reduced portion is positioned the centralr portion of the diaphragm I8 which is clamped The body casting is formed with a water inlet I0 communicating with the chamber 8 and with a water outlet I I in alignment with the flow pas 55 sage 9. The mentioned reduced portion is upwardly ex tended as at 38 to form the seat for the auxiliary valve disc 39. 9 centrally disposed of the body 5. to the valve sleeve by means such as the nut 3l. In the present instance the valve disc ispref 55 2 2,122,189 erably made of non-metallic material and is housed in a cup 55. The valve stem lll, which passes through the central passage ¿l2 of the valve sleeve 33, is formed with a threaded shank 43 having engagement with the disc holding cup, human consumption, it is essential that no re verse flow be started from the outlet 63 to the inlet line l0. This at times occurs, whether due to suction or to the establishment of a syphon action. It is for the purpose of preventing this Ul and with a shoulder portion ¿lil having an abut îng face for retaining the valve disc 39 in its cup. The cup 55 is formed with a central projec reverse flow that the ball valve 29 is provided. Any reduction in pressure in the chamber 3 will ordinarily cause a commensurate reduction in tion 45 to act as a pilot for the coil compression pressure in the chamber 265 with the resultant spring ¿l5 which projects into ’a recess seat ¿il lifting of the diaphragm from its seat. in the cover member ld. The lower end of the valve stem ¿il is formed with a shoulder ¿38 which serves to support a sleeve 139 movable with the stem and slidably mounted thereon. , The lower portion of the valve sleeve 33 may be threaded as at 50 for the reception of a ring 5l. A desired rate of flow through the passage 52 may be had by providing a ring of suitable diameter relative to the diameter of the men tioned passage. The valve is provided with an operating handle 52 having a cam portion 53 disposed within a bonnet 54’. which is clamped to the body 5 as by means of the nut 55 threadedly engaged with the cylindrical body projection 56. The handle cam 53 engages the disc portion 5l” of a sliding stem 5S adapted for movement in the guide block 59 which is clamped between the bonnet 5@ and the p-rojection 53 by the nut 55. Packing E@ is provided around the stem 58, said packing being housed in a seat in the guide block 50 and retained in position by a gland 5l. A compression spring 52 is disposed between the disc 5l and the gland 5| to serve the dual func tion of retaining said gland in place and for maintaining the stem 58 out of contact with the sleeve 139 until the handle 52 is moved. , The operation of the valve is quite well-known and briefly is as follows: When the handle is moved, the cam 53 moves the stem 58 to engage the sleeve [i9 and thus tilt the valve disc 39 off its seat 38. Water from the chamber 25 will then pass into the outlet pipe 53 via the passage 42. The release of water from the chamber 25 now allows the water pressure in the chamber 8 to lift the diaphragm I8 and thus the sleeve valve 33. Fresh water from the inlet ID now pours through the chamber 8, over the top oi’ the wall "I, and through the centralpassage 9 into the outlet pipe 53. At the same time water is passing through the bleed hole 2l, into the annular chamber 2li, through the bleed 25 and passage 3l, into the ball valve cage 2ï, and out of the port 32 into the chamber 25. The rate of ñow into the chamber 25 is relatively slow, it requiring anywhere between 9 and l2 seconds to fill the chamber 25 depending upon` conditions. During this time the ñow of fresh water into the 60 outlet -continues and the lower end of the sleeve ¿i9 moves with the diaphragm and with the valve sleeve to a point above and out of engagement with the stem 53. This permits the valve disc 39 to again seat itself on its seat 38 to stop dis CD charge of water from the chamber 2S. As this chamber fills and the pressure therein equalizes with the pressure in the chamber 8, the dia phragm moves down to seat on the top of the 4 wall l and thus breaks the flow from the cham ber 8 into the outlet pipe B3. Upon release of the handle 52, the stem will withdraw to allow the sleeve 49 to drop to its initial position on the shoulder 48. Since ñushometer valves are placed in the ref fresh water supply li. ne which is also tapped for How ever, any tendency to reduce the pressure in the chamber 25 when the valved disc 59 is seated Vwill cause the ball 29 to be sucked against the seat 35 and thus to seal the pressure in the chamber 25. Thus it will be evident that the greater the syphoning force on the chamber 8, the more tightly will the diaphragm seat on the rim of the wall 1. As seen from Figure 4, should syphon break. ing means be unnecessary, or should other syphon breaking means be employed, the ball valve may be omitted and merely a small orifice 25a provided in the skirt portion of the cover ill. Note should be made of the extremely simple construction of the ñush Valve as herein dis closed; of the ease with which it may be assem bled; of the lack of sensitively adjustable parts; and of the efficient manner of its operations. The present disclosure does not exhaust the structural possibilities and it is conceded that many changes within the scope of the invention as contemplated may well be made by skilled persons. Hence, the prior art, rather than this speciñc disclosure, should form the basis for de termining the scope of the invention as claimed. lI claim: 1. In a ñushometer valve having a cylindrical wall concentrically disposed to form an annular water inlet chamber; a pressure balancing cham ber, a diaphragm between the pressure balanc ing chamber and the inlet chamber, an in reaching annular ñange on which the outer pe ripheral margin of the diaphragm rests, an internally screw-threaded portion above the an nular flange, a cover member having external 45 screw threads for engagement with said thread ed portion, an annular ring surface on the bot tom of said cover for cooperation with the flange to clamp said peripheral margin of the dia phragm between it and the flange, the lower por 50 tion of said cover being reduced in diameter to provide an annular chamber between the thread ed portion of the body and the reduced portion of the cover, the outer circumference of the dia phragm being substantially coextensive with the 55 outer circumference of the reduced end of the cover, said flange having a bleed hole there through located beyond the peripheral edge of the diaphragm to communicate the inlet cham ber with the annular chamber and said reduced 60 portion of the cover having a bleed hole there through to communicate the annular chamber with the pressure balancing chamber. 2, In a flushometer Valve having a cylindrical Wall concentrically disposed to form an annular 65 Water inlet chamber; a pressure balancing cham ber, a diaphragm between the pressure balanc ing chamber and the inlet chamber, an inreach ing annular ñange on which the outer periph eral margin of the diaphragm rests, an inter 70 nally screw-threaded portion above the annular flange, a cover member having external screw threads for engagement with said threaded por tion, an annular ring surface on the bottom of said cover for cooperation with the flange to 75 2,122,189 clamp said peripheral margin of the diaphragm between it and the flange, the lower portion of said cover being reduced in diameter to provide an annular chamber between the threaded por tion of the body and the reduced portion of the cover, the outer circumference of the diaphragm being substantially coextensive with the outer circumference of the reduced end of the cover, said flange having a bleed hole therethrough lo 10 cated beyond the peripheral edge of the dia phragm to communicate the inlet chamber with the annular chamber and said reduced portion of the cover having a bleed hole therethrough to communicate the annular chamber with the pressure balancing chamber, a valve sleeve slid 3 ably fitting within the cylindrical wall, the up~ per portion of the valve sleeve being reduced in diameter to provide a shoulder, said reduced portion being externally threaded and extend ing through the center of the diaphragm, a nut cooperating with the sleeve threads to clamp the diaphragm between the nut and the shoul der, a portion of the sleeve extending upwardly beyond the nut and having a rounded edge to provide a seat for an auxiliary valve disc, and an auxiliary valve disc releasably held against said seat and manually operated means to un seat the auxiliary valve disc to reduce the pres sure in the balancing chamber. MICHAEL WARD.