US1987843A - Automatic flush valve - Google Patents

Description

' Jan. 15, 1935.

Jv A. SV'EJDA AUTOMATIC FLUSH VALVE Filed Sept. 1'7, 1932 4 Sheets--Sheet INVENTOR.

JAROSLAV A. SVEJDA ATTORNEYS Jan. 15, 1935. J. A. SVEJDA 1,987,843

AUTOMATIC FLUSH VALVE Filed Sept. 17, 1932 Sheets-Sheet 2.

C J f1g 5 i l Q \l R a 1 27 27 fzg 4' HI 1 L L IO 24 NH INVENTOR.

JAROSLAV A. SVEJDA ATTORNEYS J. A. svEJciA 1,987,843

AUTOMATIC FLUSH VALVE Filed Sept. 17, 1932 4 Sheets-Sheet 4 INVENTOR.

JAROSLAV A. SVEJDA Ail,

ATTORNEYS Patented Jan. 15, 1935 Tiiie mventron lates toa'n'improvement m flushing v'alv'es to a'tef clbsets and the like.

The inventio relates "particularly to. the class the ne er water; rrom 'a supply pipe and therefore-the usual jreserv'oir or" f inwardly to cock the operating crank;

ticularly to en finpioved closets; it suitable-"for use in other "6 ch H of Valve is adapted; n "tioniato' construct a v'alve to'opera automaticallyfl'after a peeve a ne-sw mme s; r w a ly .1ahe l ds 'tha h i m f mevmve "opration the pressure "of the e v e nvm'eh aa fiv l sco nee w -serving"'to peraite "thei'vflalves to permifa pie deterfiiined"- anew ofwater tof i lo'" type or automatieflush ing valve particularly adapte'dioi usewith water" tion; v t. A Figure 1 is a vertical'sectionalview through the Y valve assembly in normal'positio'n; I Figure 2 -is-'a' vertical sectional'view through 4 the valve assembly showing the push pin pressed i In the drawings, accompanying this speciflca Figure 3 is a verticalsectionalview through the 'valv'e:assemblypshowing the push pin in normal position and the" valve piston Figure 4 11s a vertical-sectional viewthrough part of the valve casing and push pin assembly, showing the main valve closed;

Figures '5 and 6 show exterior views of. the 1 assembled cylinder imit ready to be placed in casing with a universal *push pinhousing at-' Figure 8 is a section or Figure9 is an outline ot the universal push I the-push pin taken I on'line 8-8 ofFigure 7;" h

Another object of the inventzednis to'provide pin housing showing a push button instead of the handle arrangementas shown in Figure 7;

Figure 10 is ajvertical sectional view of the valve-piston and cylinderas assembled before being placedin-th'e valve casing:

igure- 111s a sectional viewof the push 'pin" casing; J

: 62'is connected byi means or Figure 12 eneleveuoner Figure 11, viewed' from the left, showing a transparent butto'n'and' index'platei 1 3"and- 14are plan and sectionaliviews,

" respectivelmof the'leather cup sprin'gfand' Figure '15' is a vertical sectional view of a} water 1 cldset-z showln'g the flushing valve in positio'n thereon. I,

- -Assl1own in the drawings:

- The valve consists-of a niain 'ca'sing provided with 'a bossBO; thereon, in whichan inlet pipe 61 is threaded? "Atiit'sljower -end, -the casing is pro vided with an adapter 41, w which the outlet'pipe the connection-gland; 43 and the }packifig 42. A I

The valve casing Iris-closed at" its upper end 'I'heizcap' i'iwhis provided on its l'ower inner. edgewith s'orewthreadsrengagih'gicorrespondingscrew=I-- threads onfa lock nutifiglatentdlee-described; .Pr

apparent as the description proce'ds.

":1 Mounted vvithin the valve flcasingz ls a cylinder-i unit otithe "configuration *shown'in -Figs.- 5iriand:6 and having for its internal parts the valve memassemblybefore placed in the va'lve' I bers about to be described. The unit consists of a cylinder 2 closed at its upper end by means of a cylinder head 3, which head in turn bears upon a gasket 4 to provide a water-tight fit at this point. The cylinder unit is secured in place by means of a cylinder lock nut 5 which also serves as a means for holding the cap 36.

Mounted within the cylinder is a piston in the form of a leather cup 6, which is made of thin leather, said cup being-held in contact with the wall of the cylinder by means of a piston leather cup spring 7, shown more clearly in Figs. 13 and 14. This spring is generally cup shaped, the sides thereof being formed of a plurality of resilient segments 7 and provided with an opening which will permit the spring to be assembled over the piston stem 16. Surrounding the piston stem 16' is a piston collar 8 supporting the piston leather cup. The piston collar is provided at its lower edge with a seat washer 9, said washer engaging the seat 9' formed in the valve casing 1. This seat 9 constitutes the seat of the main valve member including the piston 6. The washer 9 is held between the piston collar and the lower extremity of the piston stem 16'.

Integrally secured to the piston stem 16' is a piston body 10 which is for a purpose later to be described. The piston stem is screw threaded interiorly and thereto is attached a piston guide 11 provided with a hole 11' which guide is adapted to reciprocate up and down upon a stem 1'7, which stem mounts a coiled lifting spring 18, held under compression, normally, by the piston guide 11, when the piston is in its lower position.

secondarily to the piston valve or main valve is a relief valve 12, made of metal and of elongated cylindrical form, floating rather freely within the piston guide 11, and normally seated upon a washer 13, secured in place by means of a washer collar 14. This relief valve is guided by means of a guide 15, fitting within the inside chamber of the piston guide 11, and is free to rise into a hollow space formed in the stem 1'7. The stem 17 is secured to the cylinder head 3 by means of a nut 19 screw threaded upon the stem.

The chamber above the piston communicates with the chamber beneath by means of a passage '70 and opening '71, which opening is controlled by a needle valve 20, adjusted by means of a screwnut 21, said needle valve having a watertight fit within the packing 22. Since the needle valve is placed upon the upper part of the cylinder unit, it is accessible for-adjustment by removing cap 36.

Depending downwardly from the cylinder unit is an operating crank 23, pivoted to the body 10 at 26, said crank having pivoted thereto at 25, a pawl 24. Side and elevation views of the parts referred to may be seen to better advantage in Figs. 5 and 6.

The crank 23 is actuated from a point outside of the valve casing 1, by means of a reciprocating push pin 2'7 which is bifurcated, as shown in Fig. 8, so that depending crank 23 will be positioned between the bifurcations. The push pin 27 passes through the valve easing into a stufilng box 28, provided with a gland 29 and packing 30. The push pin is urged outwardly by means of a spring 31, held between the stuffing box and the push button retainer 33. The retainer is secured to the push pin by a screw and is provided with a freely slidable guide 32 which also serves to secure the push pin button 34 in place. Preferably, this push button is transparent so that an index plate 48, mounted on the face of the retainer, as

shown in Fig. 12, may be visible, therethrough. If desired, an operating handle 46 secured to the stuffing box my means of a retainer 47, as shown in Fig. 7, may be substituted for the push button.

Situated in the valve casing, at a point somewhat below the main valve seat 9 and near the discharge pipe 62, is an air vent pipe 40, directed downwardly towards the bowl of the water closet. This vent pipe communicates with the atmosphere at and admits air which can be entrained with the flushing water to increase the cutting action thereof.

Figure '7, shows a modification of the push pin housing in that it takes the form of a housing or casing 44 which is detachably secured to the main valve casing by means of a nut 45. In this manner, the housing 44 may be turned to any position about its vertical axis so that the push button or handle can be placed in a position most suitable to the final installation, that is, right-handed, left-handed, central position, etc. By this arrangement, it is unnecessary to carry on hand an excess number of types of valves, the universal housing enabling one type of valve to serve for any installation called for. By virtue of the novel cylinder unit employed, this can also be turned in the valve casing to conform to the position of the push pin housing, thus providing a very flexible arrangement and saving tremendously on the number of parts and styles of valves that must be stocked by a dealer.

Figure 3 shows a valve casing provided with a plain cap 50, omitting the bumper head 37.

In Figure 1, a stop cock arrangement, shown generally at 49, is provided in the water inlet pipe 65 and permits water to pass to the second inlet pipe 61. This stop cock may be closed entirely when it is desired to perform some work upon the cylinder unit, but it is not necessary to close it when an adjustment is to be made to the screw needle valve 20. This stop cock forms no part .of this invention, the same being reserved to form the basis for another application for patent, about to be filed.

The operator, desiring to flush the water closet or similar device, pushes inwardly upon the push button, thereby actuating the crank 23 which in turn, in its upward movement engages the relief valve 12, thereby unseating the same. Thereupon, the water which has gained admission to the chamber above the piston, by means of passage 70 and opening '71 and has found its way into the chamber surrounding the relief valve, by virtue of the opening 11', is caused to flow past the relief valve seat into the discharge pipe.

This flow of water causes a release of pressure upon the upper surface of the piston and due to an unbalanced pressure, the piston and its associated parts will rise, being aidedby the unleashing of the force stored up in the lifting spring 18. As soon as this occurs, the main valve or piston is raised above the main seat'9, as shown in Fig. 3, and the principal flushing action takes place, water flowing directly from the *inlet pipe 61, across the seat 9' to the discharge pipe 62. This flow of water in passing pipe 40, causes air to be sucked into the stream, through opening 40' and the cutting action of the water is increased.

The time during which the principal flushing action will take place is regulated by means of be regulated without shutting oil the water supply, it being only necessary to remove cap 36, to make the proper adjustment by means the needle valve.

It will be seen from Figs. and 8, that the entire cylinder together with the main and relief valves, is removable as a unit, and such arrangement renders repairing and cleaning very easy.

A new unit may be placed in the valve casing much quicker than major repairs can be made in flush valves now on the market. Should the cylinder unit be removed, the water supply is shut of! by means of the stop cock.

Various details of construction may be varied without departing from the principles of this invention and the patent granted is not to be limited otherwise than will be necessitated by the prior art.

What I claim is:--.

1. A flush valve comprising a valve casing in which is mounted a cylinder having a head closing one end thereof, two valves in said cylinder, one of said valves being the main valve controlling the flow of water, the other valve being a self-closing relief valve carried by said main valve, means carried by said main valve for actuating said relief valve to open it, means carried by said head for lifting said main valve, said cylinder, head, valves and relief valve actuating meansbeing adapted for removal from said valve casing as a unit.

2. In a flush valve, a casing, a cylinder including a head removably secured in said casing, a valve seat disposed in said casing below said cylinder, a main valve comprising a piston in said cylinder dividing the same into a plurality of chambers, a passage connecting the chambers on each side of said piston valvular means controlling said passage, a self-closing relief valve in the piston adapted to release the pressure from the upper side thereof, means carried by said head to aid in lifting said piston upon the release of said pressure, and means for actuating

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