US1587516A - Flushing device - Google Patents

Description

June 8, 1926.

1,587,516 D. M. FORFAR FLUSHING DEVICE Filed June 29; 1925 2 Sheets-Sheet 1 fzy/ .f6

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` D. M. FORFAR FLUSHING DEVICE Filed June 29, 1925 2 Sheets-Sheet 2 Patented June 8, 1926.

UNITED STATES DONALD M. FORFAR, 0F MINNE'APOLIS, MINNESOTA.

FLUSHING DEVICE.

Application led June 29, 1925. SeraI No. 40,380. n

My present invention relates to a flushing device for plumbing ixtures and the like and more particularly to an auxiliary pilot valve for controlling a water-operated main or iushing valve, and to this end, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a view partlyv in diagram and partly in section illustrating a toilet room having spaced inner and outer walls, and also illustrating in said room a urinal and the flushing device therefor; v

Fig. 2 is a view, principallyin section, of the flushing valve;

Fig. 3 is a view, principally in section, of the auxiliary pilot valve and floor box in which it is mounted with a conduit leading therefrom; and

Fig. 4 is a plan view of the parts shown in Fig. 3, with the cover of the 'floor box removed;

The numeral 5 indicates what may be assumed to be a toilet roomliaving spaced inner and outer walls 6 and 7 which afford therebetween a pipe space 8, and the finished floor of said toilet room is indicated by the numeral 9. Vithin the toilet room 5 is a urinal 10 supported on the floor 9 against the inner wall 6. Extending into the pipe space 8 is a cold water supply pipe 11 leading from any suitable source of supply under pressure and tapped' into the lower end ot an upstanding cylindrical valve casing 12 for a water supply chamber 13. The casing 12 is open at its top, and its upper edge affords a valve seat 14. Surrounding the valve casing 12 is a water discharge chamber 15, the casing 16 of which, at its bottom, is integrally formed with the lower end of the valve casing 12, and the top of which is open and extends slightly above the valve seat 14. A dome-like cover 17 for the casing 16 is detachably bolted to the top thereof and the. interior of said cover affords a water pressure chamber 18. A water discharge pipe 19 leads from the casing 16 through the inner wall 6 with its delivery end arranged to iiush the urinal 1() in the customary manner.

The open top of the water supply chamber 13 is normally closed t0 the water discharge chamber 15 by a water-operated diferential main or flushing valve 20, the small area of which is in said chamber 13 and the large area of which is in the pressure chamber 18. A pliable packing 21, secured in a peripheral groove in the valve 20, normally rests on the valve seat 14 and forms a water tight joint between the chambers 13 and 15. When the flushing valve 20 is open,

water may flow through the open top of the water supply chamber 13 into the water discharge chamber 15. The flushing valve 20 is carried by a diaphragm 22 formed with the pliable packing 21 and secured in position by having its outer marginal edge portion clamped between the casing 16 and cover 17.

The diaphragm 22, pliable packing 21 and the small area of the valve 20 afford a partition which closes both chambers 13 and 15 to the water pressure chamber 18. A constantly open axial port 23 extends completely through the flushing valve 20 and connects the water-supply chamber 13 to the water pressure chamber 18. Integrally formed with the small area of the iushing valve 20 is a depending hollow stem 24 which extends loosely into the water supply chamber 13 and guides said valve during its opening and closing movements. Formed in the upper end of the stem. 24 is a plurality of circumt'erentially spaced ports 24 for the escape of water -trom the hollow stem 24 into the water 4discharge chamber 15 when the iiushing valve 2O is open.

A rectangular metal box 25 is set into the ioor 9 with its upper edge flush therewith and located outward of the urinal 10. This box 25 is provided with a displaceable cover 26 held in position by a plurality of screws. An iron conduit 27 is laid under the floor 9 and leads from the pipe space 8 to the floor box 25.

An lauxiliary pilot valve assembly 28 is loosely and removably mounted in the loor box 25 and includes a casing 29 having a square base 30 which rests on the bottom of the box 25 and is of such size as to prevent horizontal shifting movement of said assembly in the box 25. Formed in the casing 29 are upper and lower recesses 31 and 32, respectively, connected by a restricted passageway 33, and which lower recess 32 is normally closed by a screw plug 34 and affords a water pressure chamber 35. The casing 29, at the top of the water pressure chamber 35, is beveled to afford a valve seat 36 for a valve 37 which normally closes the water pressure chamber 35 to the passageway The valve 37 is secured to the lower end of an upright valve stem 33 which is mounted for endwise movement in a seat 39 formed in the lower end of a head block 40 removably .mounted in the upper recess 31. This head block 40 is -held in the recess 31 by a clamping ring 41 having screw-thread ed engagement with the valve casing 29 and engages an annular rib 42 on the head block 40 above the casing 29 and draws said head bloclzonto a gasket on the bottom of said recess to iorm a water tight joint.

A push button 43 is secured to the upper `end of the valve stem 33 and mounted in a recess 44 formed in the upper end oi'f the head block '40 and works through an aperture 45 in the box cover 26 and normally projects thereabov'e. A packing glanc 4G yfor the valve stem 33 is mounted in the head block 40, between the seat 39 and recess 44. This packing gland is held compressed around the valve stem 38 by a washer-like follower 47 on said valve stem. A coiled spring 43 is-compressed between the follower 47 and push button 43 and yieldingly and knormally holds said push button raised and the valve 37 on itsseat 36.

'The water pressure chamber 35 oi' the auxiliary pilot valve assembly 23 is connected to the waterpressure chamber 13 by a flexible copper tube 49 and a port 50. @ne end oi' the tube 49 is tapped into the top of the cover 17 and its other end is tapped into the casing 29 on the opposite side thereof from Ythe conduit 27 and port 5() formed in the casing 29. A flexible copper tube 51 and a port 52 ailiord awaste connection `from the water-pressure 35 to a sewer pipe located'in thepipe space 8. One end oi the tube l51 is tapped into the casing 29 directly above the tube 49 and its other end is connected to the sewer pipe 53, and the port 52 is formed in 'the lcasing 29. Both tubes 49 and 51 extend :trom the box 25 through the conduit 27 to the pipe space 3, and have separable joints at a point wherethey enter said floor box from the conduit 27, and the sections ot said tubes are connected by unions 54. The purpose of providing these separable joints is to permit the auxiliary pilot valve assemblyto be detached from the tubes 49 and 51 and removed from the Hoor box 25101' inserted therein without disturbing `said tubesin the conduit 27. The purpose o'l" connecting the tubes 49 and 51 on the opposite side of the casing 29 to the conduit 27 and bending thesame around said casing ist@ allow forv expansion and contraction and I.for any variation made'in their length due to cutting. By mounting the tubes 49 and 51 in a conduit 27, they can easily be removed for the purpose ot repairs and then relaid or new ones substituted therefor without disturbing the ioor or plumbing fixtures. A hand-controlled eut-oliA valve 55 is interv posed in the cold water supply pipe 11, ad-

jacent to the casing 16, a hand-controlled cut-off valve 56 is interposed in the water pressure tube 49 in the vicinity of said cas ing 16, and a hand-controlled cut-o valve 57 is interposed in the waste tube 5l at a point after it leaves the conduit 27.

Normally the cut-oit valves 55, 56 and 57 are open and the valves 20 and 37 are closed, the latter ot which Vis held closed by the spring 48 and the former of which vis held closed by the water pressure in the chamber 18 on the side of said valve having the greatest area. To flush the urinal 10, it is yonly necessary to step on the push button 43 to open the valve 37 against the tension of the spring 40 and thereby release the water pressure in the chambers 18 and 35 and conduit 49 and permit the same to waste through the port 52 and conduit 51 to the sewer 53 or other receptacle. lith the release of the water pressure on the side of the iiushing valve 20 having the greatest area, the water pressure in the chamber 13 will then open said valve and permit water to iiow from the chamber 13 and waterpipe 19 and flush the urinal 10. This flushing action will continue as long as the push button 43 is held depressed.

' Then the push button 43 isreleased, the compressed spring 40 will close the valve 37 and thereby start the building up of a water pressure in the chamber 18 through 'the port 23 :Eromthe chamber 13. As -soon as this chamber 18, water conduit 49 and chamber 35 are filled with water, the-pressure thereof on the side of the'flushing valve 2O in the chamber 13 and having the greatest area will close said valve against the water pressure in the chamber '13 and thereby prevent further How of `said water from said chamber 13 to the chamber 15 and stop the flushing action.

1While the flushing device is shown in connection with a urinal, itis of course understood that the same is equally well adapted for use in connection with various diiterent plumbing `i'ixtures to be flushed. In some instance, it might be desirable to motmt the auxiliary pilot valve in a wall box instead ot a tloor box.

Vfhat l claim is:

1. An embedded cover-equipped iioor or wall box located at a distant point `from a Iiushing valve, a concealed conduit between the box and ilushing valve, a removable water pressure tube .leading from the flushing valve and extending throughthe conduit to the box, an auxiliary pilot valve assembly removably mounted in the box and having an actuating push button extending through an aperture in the cover of the box, and a separable coupling connecting` said tube to 6 the auxiliary pilot valve assembly outward thereof.

2. The structure defined in claim 1 in further combination with a Waste Water tube extending from the box through the conduit, and a separable coupling connecting the 10 Waste Water tube to the auxiliary pilot Valve assembly outward thereof.

In testimony whereof I affix my signature.

DONALD M. FORFAR.

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