US1203551A - Diaphragm-valve. - Google Patents

Description

M. MINTZ.

DIAPHRAGM VALVE.

APPLICATION FILED FEB. 24, I9II.

` 1,203,551. I Patented 0@I.31,1916.

" UNITED sTATEs PATENT y .y

MIKE MINTz, or nocx ISLAND, ILLINOIS, asslIGNon To oEAnLnss AUTOMATIC, ruin comm, or nocx ISLAND, ILLnvoIs, A conroaa'rIoN or-ILLINoIs.

Burman-HLW.

Specification of Letters Patent.'

Patented Oct.. 31,- 1916.

Application mea February 24, Isn. serial No. 61mm.

vuseful Improvements in Diaphragm-Valves,

of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a. art of this specication.

y invention relates to improvements inl diaphragm valves and has for its object the production of a device that may be used `in connection with any system requiring such valves, and one that is especially adapted for use in connection with 'air compressors and vacuum pumps. p f

One of the objects of my invention is to provide a device in which the use of packing between the diaphragm and the shell may be dispensed with.

A further object is the production of means whereby the strain on the diaphragm when under pressure may be distributed over the entire disk.

A further object is the production of a device in 'which an improved seat for the valve is provided thus assuring accurate adjustment of the valve. Y

These and such other objects as may hereinafter appear are attained by my device, an embodiment of which is illustrated in the accompanying drawing, in Which- Figure 1 represents a, sectional` elevationof my device; Fig. 2 represents a sectional view on the line 2-,2 of Fig. 1, loolnng in the direction indicated by the arrows; Fig.

' 3 represents a sectional View on vthe line 3 3 of Fig. 2, looking in the direction indicated by the arrows. Y

Like numerals of reference indicate like parts in the several figures of the drawing;

Referring now to the drawing, A represents a diaphragm case comprising an upper shell Vor covering 4 and a lower cupshaped shell 5 with a diaphragm 6, clamped between the edges of said shells. The lower shell is` provided with a circumferential flange 7 having on its upper face a shoulder or bead 8, extending entirely about the flange and the upper shell 4 lis also provided with a corresponding flange 9 preferably turned down at its edge as shown at 10 and dapzted to fit against the end of the shouler f.

The under face of the Bange 9 is provided with a clrcumferential groove or depression 11 registering with the bead or shoulder 8 on the lower liange.

The diaphragm in my Apreferred construct1on 1s formed from a sheet of copper and having a circumferential bead 12 adapted to tit within the groove 11 and be engaged 'by the shoulder 8, thus insurin a tight joint `without' the neceityv for pac ing.

A plurality of screws 13 pass through the flanges 7 and 9 and the outer edgev of the diaphragm 6. Ordinarily when-packing is used ,the strain on the diaphragm would all come on the portion back of the screws, whereas, in this construction, itv is distributed equally on the entire'outer circumference of the diaphragm.

The center of the diaphragm is bored or cut away and a reinforcing plate 14 inserted, providedwith a central opening 15. The under side of the plate about the opening is cut away in the shape of a spherical segment forming a valve seat 16. An inlet opening 17 is provided in the base 18 of the lower shell and a Valve stem, 19 is screwed therein. stem 19 is a spherical valve 20 adapted to lit within the seat 16. The screw connection between the stem and the base is made loose so as to permit a slight rocking movement of, the stem and in the event that the valve is notperfectly centered, this slight movement of the post brings the ball to the center of the opening when it seats', thus closing it tightly? The valve stem or post 19 maybe' held from backing down into the threads by locking it in any well known manner as for.

Seated on or in the top of the From the upper shell 4 a tube 29 extends,

communicating with the interior A', to which may lie-'connected the pipe 30 leading to the storage tank or reservoir (not shown). 4 n y As thc air forced through the valve is often impregnated with oil which collects upon the under side of the diaphragm and runs down to the/bottom of the chamber rA2, I provide means for withdrawing this material by forming a channel 31 at the lowermost portion o the chamber and communicating with a valve controlled passage 32 through which the oil is carried ofi".

The operation of my device is extremely simple air is pumped through the pipes 25 and thechamber A? through the valve opening 15 into the chamber A and through the pipe 30 into the tank or reservoir, the regulator being in open communication with the chamber A through' the pipe 26. When the pressure within the tank reaches a predetermined point, the regulator automatically operates to shut off the motor operatingthe pumps and at the same time opens the valve 33. y The pressure below the diaphragm at once drops and the diaphragm is forced downwardly by the pressure within the upper cham er, closing the valve opening 15. This valve remains closed until the pressure within the tank falls below a predetermined point when the regulator automatically starts the motor operating the pumps and closes the relief valve. The increase of pressure within the lower chamber at once serves to open the valve 15 and the operation is repeated.

It will be noted that the diaphragm disk 6 is tightly placed in position against the valve seat, and I find it often advisable to slightly raise the valve stem 19 to insure such setting at 4normal position. This form of assembling makes the diaphragm the equi-valent of a spring whereby the diaphragm will be closed where the pressure is equal in the chambers, A', A2. as soon as the air is released from the chamber A to A second, the pressure on the upper face of the diaphragm will close it and in the event that the release valve .is not operated quickly, the spring in the diaphragm itself will close the valve. It is evident that this spring is practically formed by reason of the diaphragm being tightly held between the edges of the casing by means of the bead, shoulder and groove. Attention is also called to the fact that by reason of the spherical `valve seat 16 and the spherical stem, the accurate closing of the valve is insured at all times whether a rocking stem is used or not; for instance, in

the ordinary cone valve seat or what is termed the needle point valve, the valve would have to come to a vperfect seat or fail Of course in its purpose while with this construction the diaphragm disk should be greatly depressed on one side and yet by reason of the spherical shape of the seat, the valve would close just as tightly and hold the air perfectly.

This device is extremely simple in construction in spite of which, however, it gives great durability to the diaphragm, and insures a quick and accurate seating of the valve.

rlhe relief valve, herein referred to but not claimed, switch and other features, are made the subject of separate applications, filed under even date herewith Serial Numbers 610,642 and 610,844 and are not eX- plained in detail in the present application.

While l have illustrated an embodiment of my device, it is understood, of course, that other modifications may be made without .departing from the spirit of my invention.

l claim:

1. ln a device of the class described, the combination with a casing comprising an upper shell and a lower shell, said lower shell having an axial screw threaded opening therein, of a valve member adjustably threaded in said opening, and having an axial opening therethrough leading from the interior of the casing and provided with a seating portion at its upper end, of a diaphragm held between said shells and provided with'an apertured member having a seating portion coperating with the first said seating portion.

2. In a device of the class described, the combination with a casing comprising an upper shell and a lower shell, said lower shell having an axial screw threaded opening therein, of a valve member adjustably threaded in said opening, and having an axial opening therethrough leading from the interior of the casing and provided with a seating portion at its upper end, of a diaphragm held between said shells land provided with an apertured member having a seating portion coperating with the first said seating portion, said casing having a passage therethrough for connection with a `pipe line, said passage being in communi- MIKE MINTZ.

Witnesses:

BENJ. 1F. SCHRIVER, NELLE COLLINS.

Correction in Letters Patent No. 1,203,551.

It is hereby certied that in Letters Patent No. 1,203,551', granted October 31',-

1916, upon the application of Mike Mintz, of Rock Island, Illinois, for an improvement in -Diaphragm-Valves`, an error appears in the printed specification requiring correction as follows: Page 2, line l77, for the serial number 610,844 read r 610,644; and that the said Letters Patent should be-read with this correction therein that the same may conform to the record of the case in the Patent Ofiicle.`

Signed and sealed this 28th day of November, A. D., 1916.

- {SEAL-1 F. W. H.\CLY,

my oomwesmer of Pamu. C1. 137-32. v

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