US2722229A - Anti-siphon device for flush tank valves - Google Patents

Description

Nov. 1, 1.955 R. J. WENTZ 7 2,722,229

ANTI-SIPHON DEVICE FOR FLUSH TANK VALVES Filed May 29, 1953 2 Sheets-Sheet 1 FIG. I

INVENT( )R I L ROBERT J. WENTZ A771 )ANEY Nov. 1, 1.955 R. .1. WENTZ ANTI-SIPHON DEVICE FOR FLUSH TANK VALVES 2 Sheets-Sheet 2 Filed. May 29, 1955 FIG. 4

FIG. 3

FIG. 6

FIG. 5

FIG.

INVENTOR ROBERT J. WENTZ ATTORNEY United States Patent O ANTI-SIPHON DEVICE EUR? FLUSH TANK VALVES Robert J. Wentz, Milford Center, .Ohio, assignor, by mesne assignments, to The Murray Corporation of America, Detroit, Mich, a corporation-of Delaware Application May 29, 1953, Serial No. 358,229

Claims. (Cl. "1*37'216) 'This invention relates to a simple and novel arrangement of anti-siphon device 'for water closet flush tank valves and, preferably to flush valves ,of the float operated ball cock type, but itis also applicable to other devices requiring a back flow, preventer.

Most plumbing regulationsrequire a closet bowl-flushing apparatus that will not permit the contamination of the water supply system by a back siphoning into said system of water from thecloset bowl ,or the flush tank.

"'This'has given rise to the development of various types of anti-siphon devices associated with flushing valves'for water closet flush tanks and. the present invention has been designed for use'in connection-preferably with the ball cock type of flush valve,'although obviously it can be used with anypre'ferred typevof water closet flush valve either as an integralpart of the valve body structure or as an adapter or replacement where the type of valve or valve body will permit such a conversion.

Specifically thepreferre'd form of the invention relates to an anti-siphon device or unit for ball cock valves for water closet flush tanks and more particularly to what might be called an anti-siphon attachment.or-adapter to'be used in connection with most .of the conventional types of ball cock valves now in use where thereisprovided a fitting in communication with the discharge outlet of the valve body, said fitting comprising .a water discharge outletrfor filling the fiushtankand a watersupply passage adapted to receive a refill tube forthecloset bowl.

In some instances all of these parts are more or less integral formed withfltheball'cock valve body and it is to be understood that, applicants invention is also applicable to this type of apparatus, but applicants preferred form is particularly directed to thefirst mentioned-type wherethe refillfor the tank and refill for the bowl are contained within a separate-fittingremovably secured to the ball cockvalve body.

The principal object of the presentinvention isthe production of a simple yet practical and eflicient device including in a single unit a water discharge outlet for the filling of the closet tank, a water supply passage for connecting with the refill tube for the closet bowl and an anti-siphon means interposed therebetween, said unit adapted to be connected, as such, to the water discharge outlet of the ball cock valve body, either as an original installation or as an adapter or substitute for an original fitting not provided with an anti-siphon arrangement.

Another object of the invention is to produce an antisiphon device, for the purpose indicated, at little additional expense over the conventional type of fitting having no anti-siphoning feature and one that can be carried by the trade as a replacement or adapter, the conversion being made with little or no trouble and at little additional expense.

A further object is the production of a fitting of the type indicated that would require in use and function no change whatsoever in the flush valve structure per se, so long as 2,722,229 Patented Nov. 1, 19 5 or'water-pressure control valve associated with the ball cock valve body illustrated in Figure 1.

Figure '3 is a view in side'elevation of the adapter unit per se provided with applicants anti-siphon means.

Figure 4 is an end elevational view of the adapter unit illustrated in Figure 3, and

Figure 5 is a top plan view thereof.

Figure 6 is a vertical sectional view on line 6-6 of Figure 3, and

Figure 7 is a horizontal sectional view on line 77 of Figure 3, both more clearly showing the improved anti-siphon feature of applicants adapter unit.

Referring to the drawings in detail, 1 indicates the conventional water supply pipe mounted inthe bottom -2 of a water closet flush tank with the usual gasket and clamping nuts as clearly shown in Figure 1.

The upper end of the water supply pipe 1 carries a valve body 3 provided with a reciprocating valve 4 controlled by a float (not shown), carried by the rod 5. This valve body also includes a 'manuallyset or controlled valve 6 for regulating the volume and pressure of the water passing therethrough, said water, when the valve 4 is open, passing up the water supply pipe 1 into the passage 7, past valve 6 (Figure 2) intopassage 8, past the ball cock or float control valve '4 and out through the port 9, to refill the flush tank.

In many installations the port '9 is connected'to a tank refill tube or pipe, extending downwardly to apoint adjacent the bottom 2 of the tank and in other forms this outlet port '9 is connected to various'types of fittings for refilling said flush tank from a point above the water level inithe tank and the present invention relates more particularly to this latter type of fitting.

Referring again to Figure 1, applicants improved fitting consists of a unit 10 provided with an inlet channel 11,

the outer end of which being in communication withothe .outlet port 9 of the'ball cock valve 4 and its housing 3.

The inner end of this inlet channel 11 is in communication with a chamberlZ which chamber in turn is in com- -munication with a water outlet plug 13 for refilling the 0 fiush'tank and apassageway 14 connected atits outer end to a refill tube 15 forthe closet bowl. This outlet plug 13 is provided with water restricting means *forproducing -'a coherent stream to -=thereby-silence the 'clischarge of water therethrough into the flush tank in a well known manner.

To more clearly set forth applicants invention and the improved features of the herein set forth arrangement, attention is directed to Figures 3 to 7, inclusive, with particular reference to Figures 6 and 7 wherein it will be noted that the inner end of the passageway 14 is provided end 13 extending into or to a point adjacent the tapered bore 16 of said passageway 14.

The outer end of this tubular bushing 17 is provided with screw threads 19 for securing the same in the wall of the fitting or unit as more clearly shown in Figures 6 and 7.

With the construction and arrangement as shown, the tubular bushing 17 not only provides the necessary restriction to the water passing from the chamber 12 around the reduced end of said bushing into the passageway 14 and refill tube 15, but also provides a novel and simple means through its bore 20, for venting to the atmosphere the refill tube 15 so that there will be prevented a siphoning of any water from the closet bowl back into the water supply system. Furthermore, this tubular bushing 17 will provide means for carrying off any back-pressure water not able to pass through the passageway 14 into the refill tube 15, said water passing out of said bushing and down over a water deflector or lip 21. The flooding of bore 20 brought about by the restriction between the end of tubular bushing 17 and the chamber 16, produces quiet operation of the unit and eliminates asperation noise.

In addition, it will be noted that there are no moving parts in the herein described vacuum breaker or antisiphon device and the tubular bushing 17 can be easily removed for cleaning in the event of sediment clogging the opening or said bushing can be replaced if excessive corrosion occurs without the necessity of shutting oif the water supply. Further, if any part is removed or left out or wrongly assembled, there will be a noticeable spilling of water to indicate that repairs or adjustment should be made.

The fitting as illustrated in Figures 3 to 7, inclusive, may be used in an original installation in combination with the ball cock valve as shown in Figure 1 or as a replacement or adapter substituting for an original fitting not provided with an anti-siphon means or arrangement.

What I claim is:

1. An anti-siphon adapter for flush valves for water closet fiush tanks, comprising a combination fitting including a water inlet channel, a water discharge outlet, and a water supply passage adapted to be connected to a refill tube, all in communication with each other, and means for restricting the flow of water through said water inlet channel to said refill tube, said restricting means also comprising an air vent for said combination fitting.

2. An anti-siphon adapter for flush valves for water closet flush tanks, comprising a combination fitting including a water inlet channel, a water discharge outlet and a water supply passage adapted to be connected to a refill tube, all in communication with each other, and tubular means for restricting the flow of water around said tubular means and through said water inlet channel to said refill tube, said restricting means also comprising an air vent for said combination fitting, and also means for the discharge of back pressure water not able to pass through said refill tube.

3. An anti-siphon adapter for ball cock valves for water closet flush tanks, comprising a combination fitting including a water inlet channel adapted to communicate with the discharge outlet of said ball cock valve, a water discharge outlet and a water supply passage adapted to receive a refill tube at its outlet end, both in communication with said water inlet channel, a removable tubular bushing having its inner end concentrically positioned within the inlet end of said water supply passage with slight clearance for restricting the flow of water through said passage, the outer end of said bushing extending through a wall of said combination fitting and secured therein, providing a vent to the atmosphere and also means for the discharge of back pressure Water not able to pass through said inlet tube.

4. An anti-siphon adapter for ball cock valves for water closet flush tanks, comprising a combination fitting including a water inlet channel adapted to communicate with the discharge outlet of said ball cock valve, a restricted water discharge outlet and a water supply passage adapted to receive at its outlet end a refill tube, both in communication with said water inlet channel, a removable tubular bushing extending through a wall of said fitting and threaded therein and having its inner end concentrically positioned within the inlet end of said water supply passage with slight clearance, for restricting the flow of water through said passage, said tubular bushing providing an air vent for said fitting and also means for the discharge of back pressure water not able to pass through said refill tube.

5. An anti-siphon adapter for ball cock valves for water closet flush tanks, comprising a combination fitting including a water inlet channel adapted to communicate with the discharge outlet of said ball cock valve, a restricted water discharge outlet and a water supply passage having a tapered bore at its inlet end and adapted to receive at its outlet end a refill tube, both the discharge outlet and water supply passage being in communication with said water inlet channel, a removable open ended tubular bushing extending through a wall of said fitting and threaded therein and having its inner end concentrically positioned within the tapered bore of the inlet end of said water supply passage with slight clearance, for restricting the flow of water through said passage, said tubular bushing providing an air vent for said fitting and also means for the discharge of back pressure water not able to pass through said refill tube.

References Cited in the file of this patent UNITED STATES PATENTS 1,671,361 Frankenberger May 29, 1928 2,087,503 Clemmons July 20, 1937 2,105,044 Kocour Jan. 11, 1938 2,173,070 Brown Sept. 12, 1939 2,214,863 Schultheiss Sept. 17, 1940 2,536,921 Duke Jan. 2, 1951

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