US1742973A - Flushing valve - Google Patents

Description

Jan. 7, 1930. F. A. SCHOSSOW FLUSHING VALVE Filed April 1911928 s Shiec'ts-Sheet INVENTOR m ATTORNEY Jan. 7 1930. F. A. SCHQSSGW 42,

FLUSBING VALVE Filed Apr-i1 -19. 1928 3 Sheets-Sheet 2 INVENTOR ATTORN EY Jan. 7, 1930. F. A, scl-lossow FLUSHING VALVE Filed April 19, 1928 INVENTOR ATTORN EY Patented Jan. 7, 1930 UNITED FREDERICK A SCI-IQSSOW, OF DETROIT, MICHIGAN FLUSI-IING VALVE Application filed April 19,

My invention relates to flushing valves and particularly to an improvement on the valve shown and described in the patent issued to me March 16th, 1926, #1577370,

which was designed as a relatively slow opening valve to be used in connection with a pressure tankto flush closet bowls, or for other like purposes.

The present invention relates to a similar valve whereby a primary slow opening of the valve is provided, with means for limiting the volume of water that may pass through the valve during the initial stage of operation and which may be regulated and varied to suit the particular bowl or other appliance with which the valve may be employed, so that following a predetermined period during the opening of-the valve, its

. slow opening movement is greatly accelerated, thereby obtaining the almostinstantaneous maximum opening of the valve.

It is well-known in practice that if the volume of water flowing into the bowl is very large v flooding will occur and the altitude of the water in the bowl will not lower and any foreign matter in the bowl then floats on top and though the valve may finally close, the foreign matter is apt to be leftlin the bowl. If on the other hand the volume 0 of water flowing into the bowl is too small, siphonage may be induced, but only for a moment, as the air entering the trap causes the siphon to cease almost instantly, thus again resulting in failure to discharge the 5 foreign contents of the bowl.

The present invention is designed to overcome the foregoing limitations and objections to the earlier device by providing means whereby a sufficient volume of water is delivered to the bowl to induce siphonage, but not large enough to maintain siphonic action, -the object being to secure siphonage with a minimum volume of water. Now, therefore, before the water has lowered in the bowl to a point immediately preceding the breaking of the siphon, the volume of water delivered to the bowl is suddenly and greatly augmented with the result that a long j powerful siphon is established, which gradually tapers down to a point where a break 1928. Serial No. 271,362.

occurs, following which, means are provided to insure an ample volume of water to reseal the bowl before the valve is entirely closed.

In the patent referred to, the slow'opening movement is secured by a regulating disc having a small aperture, into which is introduced a wire to limit the size of the aperture,the rapidity of the flow of water through the aperture being determined by V the speed of the opening movement. v

In the present invention the timing aperture and wire are both employed in a similar manner for securing the primary slow opening movement, but means are also provided to suddenly accelerate this opening movement by enlarging the orifice through which the timing water passes, so that while a limited volume of water passes through the valve during the primary opening period, the latter portion of the opening period has a full flow.

With the foregoing and other objects in view which will appear as the description proceeds, the invention .further resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes may be made in the precise embodiment of the invention herein disclosed without departing from the spirit of the same.

In the drawings accompanying this specification:

Figure l is a diagrammatic view partly in perspective and partly in section showing suitable piping leading from a water sys temnot indicated-to a closed tank that the water contained therein may be subsequently delivered to a closet bowldue to the pressure of the air within the tankthrough a pipe controlled by a manually operated valve, forming the subject matter of this invention.

Figure 2 is a vertical cross-sectional view through the flushing valve showing it in its normal position whereby water contained in the pressure tank is held against release.

Figure 3 is a similar sectional View through the valve body showing the manually operated handle inclined to actuate a bell crank lever, whereby the water releasing valve is forced from its seat.

Figure 4 is a fragmentary cross-sectional view on a relatively large scale, taken on or about line 4-4 of Figure 2.

Figure 5 is a fragmentary crosssectional view taken on or about line 55 of Figure 2.

Figure 6 is a cross-sectional view of a detail, taken on or about line 66 of Figure 2. Figure 7 is a planview of the valve. Referring now to the letters of reference placed upon the drawings A denotes a valve body connected by suitable piping X to a pressure tank Z into. which water from a supply systemnot shown flows through the piping Y compressing .the air in the tank in accordance with the pressure of the water delivered to the latter.

, A? is. acove bol ed 'to. an an ular flange a projecting outwardly from the upper end of the valve, body-between which is secured a diaphragm B-pieferably formed ofleather, which serves also as a washer between the cap cover and the'body of the valve,'t his dia- The main valve D includes a depending annular stem D having a limited verticalmovement in the horizontal partition (1. Mounted .centrallv upon a shoulder in the valveis a washer which closes againstthe seat of the main valve, said washer being secured by a flanged nut G screwed upon an upwardly extending screw threaded neck concentric to the depending stem D Thewasher F is further secured by a collar H having a flange overlapping the outer edge of the washer. The collar H is screwed to an annular inverted cup-shaped member I having an annular neck I projecting through the diaphragmB where the latter is engaged by a chambered beveled edge washer C, screwed upon the upwardly projecting annular neck f I of the cup-shaped element. The washer C has an upwardly extending sleeve C tapped to receive the screw threaded end of a timmgfvalve Q, fitted with a timing valve stem Q,extending loosely through the valve Q", to

provide for a minimum circulation, having its crossesectional area reduced for. a portion of its length. The timing valve stem Q is attached at its upper end to a plug Q extending through an opening at the top of the tubular stem C. The plug Q 'has a flange Q at its lower end bearing against an inwardly pro- 1 jecting flange on'the sleeve C to retain the plug in the sleeve. Q} is a spring sleeved upon the timing valve stem Q, bearing at one end against the plug Q, and at the other against the body of the timing valve Q). C is a check I valve controlling a passage through the chamber C in the beveled edge washer C.

The upper end of the sleeve C extends into the upwardly projecting hub A of the valve cover A the end of the hub being tapped to. receive a plug A Servingas an adjustable abutment to limit the upward movement of the plug Q" supporting the timing valve stem.

J is a closure cap screwed upon the hub A of the valve cover provided with a washer J? seated against the end of the hub.

Sleeved within the depending annular stem D of the main valve D is a loose fitting pin K preferably triangular in cross-sectioni to provide for the assage of water between the pin and wall 0 the stem,the pin being relatively smaller at its lower end to provide a shoulder K which upon contacting with an inwardly directed flan e'E in the annu lar stem D is prevented rom dropping out of the latter. 4

The pin'K operates as a contacting means to connect a manuallyoperated bell crank 1 lever L with a releasing'valve which is adapted to seat upon a washer E fitted; against a shoulder above the annular stern D and held in place by a collar E having a knurled head to facilitate its ready removal or adjustment.

The releasing valve M upon seating against; the face of the washer E normal closes, the opening through the annulars em D.

Extendin upwardly from the releasing valve M is a tu ular portion M", having a plurality of transverse holes m adjacent its lower endthe upper end of the tubular portion M is provided with a flat disc M of relatively large diameter which is adapted to seat at its outer marginal edge against a shoulder I formed in the bore of the inverted cupshaped element,-there being. a space I above I i the disc to allow egress of water through the releasing valvewhen in its open or raised position with the disc of the valve against the shoulder I of the inverted cup-shaped ele- I ment. I

Sleeved within the tubular portion of the releasing valve is a coiled spring N bearing at its lower end against the wall of the releasing valveM and at its upper end against an inwardly directed flange in the bore of the inverted cup-shaped element I.

Attention is now directed to the beveled edge washer C, screwed upon the neck I of the inverted cup-shaped element,so constructed that when pressure is exerted against the lower face of the diaphragm B, the dia-. phragm is forced against its beveled edge, thereby transferring the ressure to the washer and thus relieving the strain upon the diaphragm, 7

W denotes a manually operated handle;-

the end of which projects through a contracted opening in the end of a collar S, screwed into a'lateral extension of the valve body, and fitted with an arc-shaped end W bearing against a spring actuated plunger T, supported centrally within the collar by a plug T having a flange projecting between the end of the collar S and a shoulder in the valve body.

V indicates a rubber gasket or washer overlapping the end of the plug T, its marginal. edge extending between the plug and valve body and is secured to the plunger by a screw V which in turn bears against the bell crank lever, whereby the lever may be actuated upon operating the handle.

Having indicated the several parts by ref erence letters, the construction and operation of the device will be readily understood.

The valve having been connected with the pressure tank Z-which may be at the same altitude as the valve or higher or lower as desired and the pressure tank connected with the source of water supplywater is admitted to the tank from the latter.

The incoming water compresses the air within the tank until it equals the pressure under which the water is delivered to the tank.

The releasing valve during this period is normally closed except that it may be oper ated several times to expel air from the connecting pipe and chamber in the valve body above the diaphragm.

It will be evident that a manual manipula tion of the handle W will push the loose fi ting pin K upwardly in the depending annular stem D of the main valve D, causing it to impinge upon the lower end of the releasing valve M, forcing the latter from its seat.- the disc M being thereby pushed against the shoulder P of the cup-shaped element I which is a unitary part of the main valve.

Attention is now called to the relatively small opening 2' between the collar H and the inverted cup-shaped opening I of the main valvethrough which and the ports the full pressure of water may pass to the lower face of the releasing valve D. It also circulates through the space it, between the outer diameter of the collar H and the valve body, so that water pressure may pass to the lower face of the diaphragm,

When the valve is actuated, the main valve begins to rise carrying with it the timing valve QP,the stem Q, of which as previously described is recessed for a portion of its length, being held in its normal position by the spring Q, where the full diameter of the stem nearly equals the timing aperture. thereby providing a minimum of leakage for the initial movement of the main valve. The rate of the upward movement of the valve is controlled by the relative sizes of the timing valve aperture and the cross-sectional diameter of the timing stem.

When the plug Qfi, at the upper end of the stem of the timing valve, comes into contact with the adjustable nut A in the upwardly projecting hub of the valve cover, the stem of the timing valve is forced downwardly in relation to the body of the valve until the recessedportion of the stem passes below the contracted portion of the bore through the body of timing valvesee Figure 2'the rate of flow through the aperture is thus greatly accelerated, so that the main valve rises to the full open position almost instantly.

The valve remains in the latter position until the pressure tank is almost empty and the volume being necessarily greatly decreased, the pressure of water entering the main valve becomes insuflicient to maintain the releasing valve in its open position. The releasing valve therefore is forced to its seat by the coiled spring within the main valve. The force ofgravity plus the small remaining water .pressure combine at this point to seat the main valve and the water flowing through the small opening provided between the collar and the inverted cup-shaped element of the main valve passes upward and through the central aperture in the disc of the releasing valve.

If the water necessary to enter the chamber above the diaphragm was now allowed to pass entirely through the timing valve, the main valve would remain open too long, therefore a ball check valve C is provided and as soon as the release valve has dropped to its seat, water begins to flow through the check valve,allowing the main valve to close at sufiicient speed to avoid waste of water and still permit enough water to pass through the valve to provide a seal against sewer gases before the valve is entirely closed;

Having thus described my invention what I claim is: v

1.. In a flushing valve, a valve body having inlet and discharge ports; a normally closed main valve governing the flow of water through the valve body;a fluid pressure releasing valve; means for manually actuating the fluid pressure releasing valve; and a timing valve adapted to automatically retard the opening movement of the main valve only during the initial stage of the flushing period.

2. In a flushing valve, a valve body having ports for the admission and discharge of liquid; a diaphragm supported in the valve body; a normally closed main valve controlling the fiow of liquid through the body; a normally closed releasing valve adapted when v manually actuated to open the main valve due to the pressure of the fluid on the under side of the diaphragm; an automatically operated timing valve having means for varying the area of the passage through said timing valve.

- 3. In a flushing valve, a valve body having inlet and discharge ports; a normally closed main valve governing the flow of water through the valve body; a releasing valve adapted when actuated to permit a relatively slow initial opening of the main valve; manually operated means for actuating the releasing valve; a timing valve carried by the main valve provided with a stem having a portion of its length reduced in cross-sectional diameter, whereby the area of the bore through which the stem passes isreduced by the maximum diameterof the stem during the first part of the opening period,

thereby permittingonly a. limited volume of water to. pass through the port opening,- the bore area being afterwardscorrespondingly enlarged through the automatic longitudinal Shifting of the stem to present the minimum diameter of the stem in the bore, thus increasing the area of the port opening, whereby a full flow of water may pass through the valve duringthe latter part of the flushin period; and means adaptedfto automatically and longitudinally shift the stem of the timing valve. 7

4. In a flushing valve, a valve body having inlet and discharge ports; a normally closed main valve governing the flow of water through the valve body; a releasing valve adapted when actuated to permit a slow initial opening movement of the main valve;

means for manually actuating the releasing valve; a stem valve of relatively difl'erent cross-sectional areas throughout its length, whereby a variation of the volume and flow of water through the valve may be efi'ected by longitudinally shifting the stem valve in relation to the discharge port governed by the a stem valve; and an adjustable abutment in line'with the travel of said valve, whereby the stemvalve may be shifted longitudinally upon contacting with the abutment to increase the volume and flow of water through V the valve port at the latter part of the flushing period.

In testimony whereof, I sign this specification.

FREDERICK A. SCHOSSOW.

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