US2549628A - Flush valve - Google Patents

Description

c. D. MYR

April 17, 1951 FLUSH VALVE Filed Feb. 15, 1946 INVNTOR.

/ rvzg Patented Apr. 17, 1951 FLUSH VALVE Claus D. Myer, Grantwood, N; J., ass'gnor 'tov 'Myer Flsh'om'eter Co., Grantwood, N. J., a

partnership ApplicationFebruary:15, 1946, Serial No. 647,815`

facture, capable off ready?adjustment-v and repair and operable by the; user-with the utinostl ease. Further and more-` speciiicL objects;V features, andv advantages will more clearly' appear'ffrom the detailed speciiication hereinafter set fo'rth" especially when taken in connection witl'r-the` accompanying drawingsV which illustrate a'- prese* ent preferred form which the' inven-ti'odmay assume and which form part ofthe yspeciii'oation.`

In the briefest and mostv general termsthe r` inventioncomprises the following general fea-yk tures z 1. A valve stem', a valve moveable-relative the stem,` and means on the stem' tollimit the movement of the valve thereon in'v either direction;

2. A valve seatedon its seat, Va 'stem capable' of moving up and down' somewhat while? the valve is on its seat, afcupLshape-d coverfon' the stem above'the Valve tofhous'e the 'valverwhen the stem is down and means onthe lower end ofthel stem to lift the valve 01T its seat-when the stem has been' raised a derlnitearnount.v

- 3. A cover to house the valve which .when

lifted will permit water to flow through the valve,

which is perforated, even'beforethe'val've islifted and which will permit water tov flowV through the valve even after the Valve-iss'eated` until the/cover is in 'fully housing position-with respect to the valve.`

The present preferred' form :which .the invention may assume is shown` in' the-'drawings' of' which, I

Fig. 1v is a vertical cross section?othevalv'e';

Fig. 2 is a plan vie'wwith a portion broken away;

Fig. 3 is an elevation'. of -the?vali/"standy Fig. e is an elevation of the shell wilthitsflower edge cut through in scalloped"fashion;`

Conning this portion of the spe'ei'cation' to the specific structure shown'`A in the drawings;

it will beseen that the improved yvalve?comprisesl a valve casingv ID' providedA with an interiorly fitted sleeve II. actingfas aivalve seatilan'clcomw municating with an external nipple I2. Water.

' neoted to the nipple I2. Valve I4 ccacting with the seat II is guided preferably by a dependent spider I6.

The stem I'I of the valve passes upwardlyv through a closed cylinder I8-andits upper end rides in a bore I9 in the cap 20 which threadably closes thetop ofthe cylinder I8'. A cup 2I isseated on a shoulder of the stem I1 and between it and the cap 2D there is disposed. a coiled expansion spring 22 whichtends at all times to-move the stem I'I downwardly. It will be noted that the lower end' ofthe cylinder I8 is" flanged 'as at 23 and bolted or otherwise se#- cured as at 24 to a flange 251cm the valve casing IIJ. The lower cylinder head is formed by a metal ring plate 26 and apacking ring 2l held in place between shoulders onthe casing Ill Vand vthe cylinder I8. The ring plate 23 divides the upper chamber from the lower chamber and prevents sand-mud or other foreign matter from passing upwardly to interfere with the working parts. This is most important when the valve is used for marine use.

In the cylinder IS'thestem Il is provided with a piston ange 28 beneath which is disposed a rubber cup-shaped pistonl 29held in place by a-shoulder 3ll-swaged out of the stem I'l. Beneath the piston 29 is a hollow cylindrical shell 3I with its upper open end bearing against the piston 29' and its lower wall 32 bearing-against the lower end ofthe stem Il. The shell 3l is held in this position by the upper end of the spider I6 -which is reduced in diameter as at 33 andl is fastened againstrthe bottom wall of the shell 3| by means of'a screw stud 3d extending from the bottom of the spider I6 through a. small hole' in the lowerV wall 32 oi the shell 3|; and'thereby'also holds the shell 3l in place. Theshell 3|` as! seenl moves up and down with the stem-Ill and fits somewhat loosely in the ring plates 23 and27 so that high pressure water may leak therefrom around the pipe I3 and get into the cylinder I8. y

Thishigh presuref water will fillY the cylinder both above and below the piston 29-`and can pass from one side to the other of the piston 29by way of connected' by'pass passages, 33, 31,and 33 in which is disposed a check screw valve 39'.. To let out this water when desired removable screw plugs-:island lll are provided.

The stemA I'I beneathI thev cupvwasher1 2-I'is provided with a slot 42 in which is disposed a circular plate 43 on an arm 44 connected to a collar 45 fastened to a squared portion 46 of a shaft 41 to one end of which an operating handle 48 is connected. The inner end of this shaft is reduced in diameter as at 49 and is seated in a suitable bore in the cylinder wall. A screw nut 50 around the outer end of shaft 41 acts as a packing. It will be noticed that the handle 48 connected to the end of shaft 4'I is bent around at 5I parallel to the shaft 47 and that its operating end is then bent downwardly and at right angles to the shaft 4'I as shown at 52. This downward angle is rather sharp as seen in Fig. 1 for a reason later to be set forth.

Returning now to the valve I4 it will be seen that it is of annular shape and not a solid valve and that it has a central large opening 53 therein which is very slightly larger than the diameter of the reduced portion 33 of the spider I6 above mentioned so that the valve I4 may move relatively to that portion of the spider and vice versa. The lower end of each leg of the spider I6 is curved outwardly as at 54 to slide snugly within the sleeve valve seat II. The lower end of the shell 3I extends below the wall 32 and its lower edge or circumference is cut through to form a series of scallops 55 as shown in Fig. 4. The valve I4 also on its outer periphery 56 is tapered upwardly to t into the similarly shaped inner wall of the lower end of the shell 3 I.

Now considering the operation of the structure thus above described, it will be clear that when the user is seated on the ush closet the valve may be back of him and the slope downwardly of the handle permits it to be operated by his merely moving back and pressing against` the end of the handle with his back. When the handle is operated it turns the shaft 47 raising the arm 44 and consequently the stem Il against the resistance of the expansion spring 22.

High pressure water from inlet pipe I3 has already leaked past the plate 26 and packing ring 21 and lled the cylinder I8. The movement of the piston 28 upwardly with the stem will be possible because the liquid in the cylinder I8 will be by-passed from the top of the piston 29 to the bottom thereof through the passages 36, 3'! and 38 above mentioned and the rate of ow is determined by the setting of the check screw 39.

As the stem starts to rise it lifts the shell 3I but the valve I4 is not immediately lifted. However, as soon as the shell is lifted a small amount, the scalloped lower edge of it and the taper between its inner face and the valve I4 will immediately permit water at high pressure to flow around beneath the lower edge of the shell and up and around the valve and down through its central aperture 53 and between the legs of the spider to the outlet pipe I5. In other words the valve I4 stays on its seat at the beginning of the movement of the stem Il and is not lifted olf of it until the outwardly extending lower ends 54 of the spider legs engage the lower surface of the annular valve I4 to positively lift it off 4 cordance with the operation of the spring described in the above mentioned patent, the stem slowly descends at a predetermined rate of speed and as it moves down it'carries the cup or shell and the cup on its lower portion will descend also with the valve I4 resting on the flared legs 54 of the spider I6. As the downward movement continues the valve I4 will come to rest on its seat before the cup has entirely surrounded it and therefore during this time also a small amount of water will be allowed to flow until the cup entirely surrounds the valve and shuts ofi' the water entirely.

Thus we have a valve relatively movable on a stem and limited in its movement thereon; with spider legs to lift the valve at the bottom of the stem; and a cover above the valve on the stem to house it when the stem is down; with means to permit small amounts of water to flow through the valve which is perforated before it leaves its seat and after it regains its seat until the respective lifting of the valve and the covering of the valve has been completed respectively.

While the invention has been described in detail and with respect to a present preferred form which the invention may assume, it is not to be limited to such details and forms since many changes and modifications may be made in the invention without departing from the spirit and scope of the invention in its broadest aspects. Hence it is desired to cover any and all forms and modifications of the invention which may come within the language or scope of any one or more of the appended claims.

What I claim as my invention is:

1. In a device of the class described a valve stem, an annular shaped valve having a tapered periphery and moveable along the stem within predetermined limits, means on the lower end of the stem to lift the valve from its seat when the stem is moved a predetermined distance upwardly, a cup-shaped element on the stem above the valve and having its lower edge cut through in scalloped fashion, said cup-shaped element having an inner tapered wall adapted to house and cover the valve on its seat when the stem is in its lowest position, the movement of the stem upwardly from its lower-most position lifting the cover to permit regulated small amounts of liquid to pass through the scallops and around and through the valve as soon as the cover is lifted and before the valve is lifted from its seat.

2. In a device of the class described a valve stem, an annular shaped valve moveable along the stem within predetermined limits, means on the lower end of the stem to lift the valve from its seat when the stem is moved a predetermined distance upwardly, a cup-shaped element on the stem above the valve and having its lower edge eut through to form one or more scallops, said cup-shaped element adapted to house and cover thevalve on its seat when the stem is in its lowest position, the cover and the valve having cooperating adjacent tapered surfaces, the movement of the stem upwardly from its lower-most position lifting the cover to permit regulated small amounts of liquid to pass through the valve as soon as the cover is lifted and before the valve is lifted from its seat.

3. In a device of the class described, a valve stem, an annular valve with a tapered periphery relatively movable along the stem, a spider fixed to the lower end of the stem, the lower ends of the legs of the spider being outwardly flared and adapted to engage and lift the valve when the stem is moved upwardly, a housing fixed to' the stem and having a cup-shaped bottom with an inner tapered wall to receive and house the valve therein, the lower edge of said housing being out through to form scallops, water passing through the scallops around the valve and through its central aperture when the housing is initially lifted.

4. In a device of the class described, a valve stem, an annular valve with a tapered periphery relatively movable along the stem within predetermined limits, means on the lower end of the stern to lift the valve from its seat when the stem has moved a predetermined distance upwardly, a housing fixed to the stem and having a cup-shaped bottom with an inner wall to reoeive and house the `valve therein, the lower edge of the housing being cut through to ,form scallops to permit water to pass'through the scallops and around the valve and down through its central opening when the housing is lifted from the valve and before the valve has been lifted from its seat.

CLAUS D. MYER.

REFERENCES CITED The following freferences are of record in the file of this patent:

UNITED STATES PATENTS f Number Name Date 454,007 Robinson June 9, 1,891 926,385 Lippold July 6, 1909 FOREGN PATENTS.

Number Country Date 198,115 Great Britain Mar. 13, 1922 672,462 France Dec. 28, 1929

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