US1077745A - Flush-valve. - Google Patents

Description

A. N. PASMAN.

FLUSH VALVE.

APPLICATION FILED Auelzl, 1912. I

1,077,745. Patented Nov. 4, 1913.

2 SHEETS-SHEET 2.

COLUMBIA PLANDORAPH C0..WASMINGTON n c ABRAM N. PASMAN, or JERSEY CITY, new JERSEY.

FLUSH-VALVE.

Specification of Letters Patent.

Patented Nov. 4, 1913.

Application filed August 21, 1912. Serial No. 716,123.

To all whom it may concern:

Be it known that I, ABRAM N. PASMAN, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented an Improvement in Flush-Valves, of which the following is a specification;

My present invention relates to self or automatically closing flush valves, adapted fo use in connection with closets, urinals and other places where a predetermined quantity of water is required for use-at any given time.

Heretofore, automatically closing flush valves have been so constructed that upon opening a release valve a given quantity of entrapped liquid was permitted to flow to a discharge of the valve, and the inlet valve opened to permit the water from the supply to pass directly to the place to be flushed. Means have also been employed in these valves for varying and consequently regulating the time in which the inlet valve is automatically reseated. Difiiculty, however, has been experienced in the use of this type of valve under varying conditions of water pressure. It has been found that when there is a relatively free passage of the water from the chamber in which the same is entrapped to the discharge these valves work well. under low water pressure, and in order to make them work equally well under high pressure,

it is necessary to more or less restrict thisflow of the entrapped water, from the chamher in which it is entrapped, to the discharge. Furthermore, flush valves have also been provided in which after the inlet valve has been opened, the flow of water from the supply is temporarily shut off and remains so as long as the release valve is open, and my present invention relates to this particular type of valve. In these valves, difficulty has been experienced in an eifort to overcome the pounding caused by the impact between the piston, which operates the inlet valve, and the end of the piston cylinder when the supply is temporarily out ofi after the inlet valve has been opened, and theobject of my present invention is to overcome this difiiculty, and to this end the valve made in accordance with my invention is so constructed that upon opening the release valve the water pressure causes the inlet valve to open, and the piston, by which the inlet valve is carried, to travel the full extent of its stroke, at or about which time a shut off valve, also carried by the piston, is made operative and remains so as long as the release valve is open. It will be apparent, therefore, that inasmuch as the piston is caused to travel the entire length of its stroke, before the shut ofi valve is operative, there is no possibility of any pounding, and this is so irrespective of the water pressure on which the valve is used, and consequently the valve will operate equally well on a service in which there is considerable variation in the water pressure.

In the drawing Figure 1 is a partial elevation and longitudinal section of my improved fiush valve. Fig. 2 is a central longitudinal cross section of the flush valve showing the parts in a different position from that shown in Fig. 1. Fig. 3 is a view similar to Fig. 2, showing the parts in still another position. Fig. 4 is an inverted plan of the release valve head. Fig. 5 is a cross section on line w m, Fig. 3. Fig. 6 is a cross section on liney 3 Fig. 3.

Referring to the drawing, the flush valve made in accordance with my present inven tion, preferably comprises a. casing or body member, which at one end is cylindrical, as is indicated at 10. This cylindrical end 10 is provided with a flange 11 and an endopening 12. The casing also comprises a central cylindrical member 18, which is integral with the end cylinder 10, but of appreciably smaller diameter. The shoulder 14, connecting the end cylinder 10 with the cylinder 13, is provided with a series of spaced openings 15. At the opposite end of the casing, there is also a. cylindrical end 16, this being theinlet end of the valve, the.

cylinder 16 making provision for the inlet chamber 17. The exterior surface of the inlet cylinder 16 is screw threaded and adapted to receive a nut 19, provided with a flange 20, by which, together with the flange 11, the valve is secured in position, as will be understood by those skilled in the art. Between the cylinder 13 and the cylinder 16, and connecting the same, there are series of ribs 21, providing for discharge passages 22. 7

Referring again to the cylindrical end 10, I employ within this member a release valve head 23. This release valve head is provided with an end recess 24, adapted to receive a gland nut 25, and also with a chamber 26, in

the walls of which there are spaced openings 27, which when the release valve head is in position, are preferably made to register with the openings 15 in the shoulder 14. Between the release valve head and the upper ends of the shoulder 14 I employ a gasket 28, in which there are also series of openings, which register with the openings 27 and 15. Extending from the inner wall of the release valve head is a flange 29, which is exteriorly screw threaded to engage the interior screw threads provided at the end of the cylinder 13, by means of which, as will be understood, the release valve head is secured in position.

Extending through apertures provided therefor in the various walls of the release valve head, is a valve stem '30. On the inner end of the valve stem 30 is a valve 31 secured in position thereon by a nut 32 and adapted to bear against the valve seat 33. Secured to the outer end of the valve stem 30 is a cap 34 of approximately the same diameter as the opening 12 in the cylindrical end 10. This cap 34 may be secured to valve stem 30 by a screw 35 or otherwise. I also employ a spring 36, extending between the outer surface of the inner wall of the valve stem head and the cap 34, the function of the spring being to normally maintain the cap in a raised position and the release valve 31 against its seat 33. Within the cylinder 13, I employ a piston 37 to which is secured, by being made integral therewith or otherwise, a depending stem 38. This depending stem has a flange 39 and also a flange 40, both of which parts are made integral with the stem. The inner or lower end of the stem is of appreciably reduced diameter, as indicated at 41, and at its extremity, is provided with lock nuts 42. The bore 43 extends longitudinally through the stem 38, and the bore 44, communicating therewith, through the reduced portion 41,

and preferably adjacent to the piston 37 the bore 43 is adapted to receive a screw 45. This screw is provided with tapered slots, as is customary in valves of this type, so that the flow of the water through the bores 43 and 44 will depend upon the position of the screw 45. r

48 designates an inlet valve, 46 a spacing washer, and 47 a cup leather, all of these parts being maintained in their relative positions, as shown in Figs. 1, 2 and3, by means of a nut 49 turned down on the screw threaded surfaces of the flange 39, the inlet valve in its normal position being adapted to bear against the valve seat 50, which is the upper surface of a flange 51, provided at the end of the inlet chamber 17 and adjacent to the discharge passages 22. I also employ a dash pot 52 provided with an aperture 53 in its cylindrical wall. Beneath the dash pot 52 is a shut off valve 54 of substantially the same diameter as the diameter of the opening in the flange 51, this valve 54 being adapted to enter this opening to shut off the water from the supply, as will be hereinafter explained. V

Beneath the shut off valve 54, I employ a nut 55 to secure the shut off valve in position, and the lock nuts 42 at the extremity of the depending stem 38 limit the movement of the dash pot 52 relatively to the stem 38.

57 designates a coupling nut, by which the cylinder 16 may be secured to thesupply or inlet pipe 58, and it will be understood that the valve is adapted to be placed in the rim of a closet bowl with the flanges 11 and 20 resting in suitable seats provided therefor in the rim of the bowl.

In the operation of the hereinbefore described flush valve, the parts thereof are in their normal positions, as shown in Fig. 3, in which there is a quantity of water within the cylinder 13 between the release valves 31 and the piston 37, this water being under the same pressure as that in the supply pipe, because of the direct communication therewith through the bores 43 and 44 in the stem 38. N ow upon pressing the cap 34 against the action of the spring 36, the release valve 31 will be opened by being moved from its seat. This action releases the water from the cylinder 13, and by virtue of the pressure in the supply pipe, the piston 37 moves from the position shown in Fig. 3 to the positions shown in Figs. 1 and 2, forcing the water from within the cylinder through the ports in the inner wall of the release valve head to the chamber 26, thence through theapertures 27, through the apertures in the gasket 28, and through the apertures 15 to the discharge. This movement of the piston 37 opens the inlet valve 50, permitting the water from the supply to pass to the discharge, through the discharge passages 22.

Referring particularly to Fig. 1, it will be seen that at the time when the piston 37 reaches the end of its forward stroke, the shut off valve 54 is just below the opening or port in the flange 51. Obviously, after the discharge passages 22 have been opened to their full extent, the pressure against the piston is reduced to such an-extent that its further travel in the cylinder 13 is comparatively slow, and for this reason the piston will come against the end of the flange 29 without sufficient impact to produce any pounding, and after the piston has reached the end of its forward stroke,'the pressure of the water flowing from the supply to the discharge will gradually force the dash pot 52 upwardly, causing the water contained therein to pass through the aperture 53 until flnally the shut off valve 54 enters the port in the flange 51 and completely shuts off the supply of water from the discharge. Manifestly, this condition is maintained until the release valve has been closed by the action of the spring 36 after the pressure has been removed from the cap 84. When the release valve 31 is closed, the water from the supply gradually passes through the bores 44 and 4:3 in the depending stem 38, and to the interior of the cylinder 13, and the area of the piston being materially greater than the area of the shut off valve and the inlet valve, the gradually accumulating water in the cylinder 13 forces the piston 37 downwardly until the inlet valve again reaches its seat. It being understood that the dash pot, in returning to its normal position, as shown in Fig. 3, does so by gravity, the space within the dash pot being filled with water and air.

I claim as my invention:

1. In a flush valve, a casing having an inlet connection, a discharge opening, and a cylindrical portion, a piston in the cylindrical portion, means permitting the flow of liquid from the inlet connection to the interior of the cylindrical portion above the piston, a release valve, an inlet valve carried by the piston, and means connected to and carried by the piston and also movable independently thereof so that the movement of the same may be continued in the same direction after the piston has reached the end of its forward stroke, for gradually and positively shutting oft the flow of water from the inlet connection to the discharge opening.

2. In a flush valve, a casing having an inlet connection, a discharge opening, and a cylindrical portion, a piston in the cylindrical portion, an inlet valve connected to the piston, a stem depending from the piston and having a bore therethrough, means for regulating the passage of the water through the said bore, a release valve, means for opening the release valve to permit the liquid above the piston to pass to the discharge opening, and means connected to and carried by the piston and also movable independently thereof so that the movement of the same may be continued in the same direction after the piston has reached the end of its forward stroke for gradually and positively shutting ofi the flow of liquid from the inlet connection to the discharge opening.

3. In a flush valve, a casing having an inlet connection, a discharge opening, and a cylindrical portion, a piston in the cylindrical portion, an inlet valve connected to the piston, a stem depending from the piston and having a bore therethrough,means for regulating the passage of the water through the said bore, a plunger connected to the said stem, a release valve, and means associated with the plunger and operative after the piston has reached the end of its forward stroke for closing a port between the inlet and discharge and maintaining the same closed so long as the release valve is open.

4:. In a flush valve, a casing having an inlet connection, a discharge opening, and a cylindrical portion, a piston in the cylindrical portion, an inlet valve carried by the said piston, a stem depending from the piston and having a bore therethrough, means for regulating the passage of the water through the said bore, a plunger connected to the said stem, a dash pot movable on the said stem and within which the said plunger operates, a shut off valve associated with the said dash pot and adapted after the piston has reached the end of its inner stroke to close a port between the inlet and discharge, a release valve, and means for opening the release valve to permit the water in the cylinder above the piston to pass to the discharge.

Signed by me this 25th day of June, 1912.

ABRAM N. PASMAN.

Witnesses:

BERTHA M. ALLEN, J. B. LE BLANc.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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