US2012255A - Flush valve - Google Patents

Description

Aug.2o,193s. F C, BINNALL l.2,012,255

FLUSH VALVE Filed Oct. 7, 1930 gfx/manto@ @Mgg/G5 adam,

Patented' Aug. 20, 1935 PATENT OFFICE FLUSH VALVE Frederick C. Binnall, Blue Ridge Summit, Pa., assignor,` by mesne assignments, to Tradewald Corporation, Washington, D. C., a corporation of Delaware,l and Harvey C. Bridgers Application october '1, 1930, serial No.' 481,050

10 Claims.

'I'his invention relatesv to ush valves and particularly to means for reducing the noise made by ush valves as they close.

The invention further provides improved means for mounting the valve stem so as to eliminate unnecessary noise and without the necessity of making such valve stems fit so accurately as has been heretofore necessary.

Referring to the accompanying drawing, which is made a part hereof and on which similar reference characters indicate similar parts',

Figure 1 is a vertical section of a flush valve showing my invention applied thereto.

Figure 2 is an enlarged section showing the assembly of the diaphragm forming a part of the valve,

Figure 3 is a section on line 3-3 of Figure l,

Figure 4 is a detail view of the porous or foraminous valve-silencing means forming a part of the preferred valve construction;

Figure 5 is a detail view of a modified form of porous or foraminous valve-silencing means. I

In the drawing numeral I indicates the body` of the valve having an inlet chamber II andan outlet chamber I2. A cap I3 screw-threaded upon the bodyA Ill connesa diaphragm I4 to provide a pressure chamber I above the diaphragm. A by-pass passage I 6 is provided through the diaphragm for admitting pressure from the inlet passage to the chamber I5. A valve stem I1 depends into the outlet .chamber I2. The upper end of this valve stem has a flange I 8 scured thereon as by screw threads and a cap I9 is screw threaded into this flange, the cap I8 and the ange I8 being threaded down against the inner edge of the diaphragm I4. The valve stem I1 is hollow and a valve 20 seatsvwithin the portion I9 to seal the valve stem to prevent fluid from flowing from the pressure chamber I5 through the valve, 'Ihe lower end of the valve stem I1 is supported in an annular series of lugs 2| which are formed on the inner side of the body I0 of the valve and which hold the stem I1 against lateral movement to prevent it from oscillating during operation, thus eliminating any sound due to such oscillation. A manually operable lever 22 is positioned in a cap 23. The inner circular portion of the handle rests against a pin 24 which pin is normally urged outwardly by means of a spring 25. Movement of the handle 22 in any direction will move the pin 24 inwardly to strike against the lower end of the stem 26 depending from the valve 20. This will lift one side of the valve from its seat and release the pressure of water in chamber I5. Pressure o! water stituting the principal objection thereto.

in the chamber A-II therefore will lift the diaphragm I4 to permit water to flow down around the seat 21 of the valve into the outlet chamber I2. As soon as the handle 22 is released the valve 20 resumes its position on its seat and `-pressure 5 builds up in the chamber I5 by means of water owing through the restricted port I6. As soo'n asA the pressure in the chamber I5 has become great enough the diaphragm I4 will be pressed to its seat 21. As the diaphragm nears its seat 21 rel0 stricting the flow of water from high pressure region II to low pressure region I2 it causes its velocity to increase as it passes through the restriction. This increased velocity tends to produce a hissing sound which is highly objection- 15 I -around Ithe valve stem I1, whichforamincus or porous member, when the diaphragm ilexes downwardly, approaching the valve seat 21, ex-

tends well into the outlet port defined by said valve seat and materially reduces or dissipates 30 the tendency of the uid to ow between the diaphragm I4 and the seat 21 at high, sound generating velocity, thus eliminating the final sounds common-to valves of this type and con- 'I'he 35 screens 28 rest upon an annular series of pointed fins 29. Instead of the screens as shown at 28 I may provide a plurality of perforated corrugated plates 30 as shown in Figure 5.

It will be obvious to those skilled in the art 40 that various changes may be made in my device without departing from the spirit of the invention and therefore I do not limit myself to what is shown in the drawing and described in the speciiication, but only as indicated in the appended claims.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. A flush valve comprising a casing having in- 5 let and discharge openings therein, a valve seat,

a diaphragm movable to rest upon said seat to` cut oi the now of water through the valve, and means supported by and movable with said diaphragm for reducing the velocity of the water the valve.

owing through the valve as the valve nears its seat in closing, said means comprising a plurality of screens positioned in the path of the water flowing through the valve whereby the velocity of the water is decreased.

2. A flush valve comprising a casing having inlet and discharge openings therein, a valve seat, a diaphragm movable to rest upon said seat to cut off the flow of water through the valve, and means supported by said diaphragm for reducing the velocity of the water owing through the valve as the valve nears its seat in closing, said means comprising a plurality of perforated corrugated disks positioned in the path of the Water owing through the Valve to reduce the velocity of the water.

3. A flush valve comprising a valve casing having fluid inlet and outlet ports therein, a diaphragm, a valve seat upon which said diaphragm rests to close the inlet from the outlet ports, a4

stem on saiddiaphragm, means on said stem for reducing the velocity of the water iiowing through said valve as thefdiaphragm approaches its seat, said last named means comprising a plurality of screens mounted in superposed relai tion on said stem and positioned in the path of the water owing through said valve to reduce the velocity of the water whereby the sound ordinarily caused by high velocity of the water Vilowing through the valve is eliminated.

4. A ilush valve comprising a valve casing having iluid inlet and outlet ports therein, a diaphragm, a valve seat upon which said diaphragm rests to close the inlet from the outlet ports, a stem on said diaphragm, means on said stem for reducing the velocity of the water flowing through said valvek as the diaphragm approaches its seat, said means comprising a plurality of perforated corrugated disks mounted on said valve stem in the pathof the water owing through the valve to reduce the velocity of the water to eliminate the sound ordinarily caused by the high velocity of the Water issuing through the valve.

. 5. A ilush valve comprising a casing having inletand outlet ports, a valve seat secured in said casing, a diaphragm valve secured in said casing said valve having a valve stem depending through the valve seat, a spider mounted in said casing adapted to guide said valve stem and support it against lateral movement, and means on said valve stem adapted to reduce the velocity of water owing through the valve as the valve approaches the 4valve seat, said reducing means comprising a plurality of screen disks mounted in superposed relation upon said stem within the path of the water flowing through 6. A silent uid control valve comprising a casing having a uid passageway therethrough, a valve seat in said/casing passageway, a disk valve cooperative with said valve seat to close said passageway, means for moving said valve to casing having a uid passageway therethrough,

a valve seat in said casing passageway, a disk valve cooperative with said valve seat to close said passageway, means for moving said valve to control fluid flow through said passageway, and a flow-restricting member composed of wire mesh carried by said valve and associatedwith the walls of said passageway, said now-restricting member having such porosity as to permit but materially reduce luid flow between said seat and said valve as said valve approaches said seat.

8. A silent uid control valve comprising a casing having a passageway therethrough, a valve seat in said casing passageway', a disk valve cooperative with said valve seat to close said passageway, means for moving said valve to control fluid new through said passageway, and a flow-restricting member comprising a plurality of perforated corrugated disks carried by said valve and associated with the walls of said passageway, said now-restricting member having such porosity as to permit but materially reduce fluid ow between said seat and said valve as said valve approaches its seat.

9. In a valve, a casing having an inlet port, an outlet port and a valve seat intermediate said ports, a valve member movable with respect to said seat to control the flow of fluid from said inlet to said outlet port, and a highly porous flow-restricting member movable into and out of close, now-restricting relation with the casing wall defining said outlet` port, said nowrestricting member being so coupled to and movable with said valve member as to be in least eiective now-restricting relation with said outlet port when said valve is wide open, and to be in close, flow-restricting relation with said wall when said valve is nearly but/not completely seated. f I

10. A silent lvalve for liquid supply lines, comprising: a valve casing having a liquid passageway therethrough, which casing is provided with Aan internal shoulder constituting an annular valve seat, a disk valve co-operative with said seat, and means for precluding the emission of y sound due to liquid flow through the space between said seat and valve when unseated, said

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