US1785289A - Balanced valve - Google Patents

Description

Dec. 16, 1930. J W, TUKER 1,785,289

BALANCED VALVE Filed April 24, 192e 2f sheets-sheet 1 J, WTzv/ SH01 we,

Dec. 16, 1930..l 1 W. TUCKER 1,785,289

BALANCED VALVE Filed April 24, 1923 2 SheebS-Sheet- 2 v atroz 4 Le 41 Patented yDec. 16, 193C JOHN wILsoN Turina, or BEAUMONT, 'rms BALANcan vALva Application iiled April 24,

This invention relates to balanced valves and more particularly to a valve structure `for controlling rams, presses and the like where intake and exhaust of the ressure fluid to 5 and from theoperating cyllnder take place through the same opening.

An important object of theinvention is to provide in a device of this character a structure such that the ressure to which the valve I is subjected and w ich opposes movement of the valve may be balanced, whether this pres Sure be of intake or exhaust iuid.

A further object of the invention is to provide a device of this character which may be i comparatively cheaply manufactured and which will, at the same time, be durable and efficient in service.

These and other objects I-attain by the construction shown in the accompan ing drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein A Figure 1 is a longitudinal-sectional view through a valve constructed in accordance with my invention, the valve element being shown in the osition which it occupies in exhausting Hui s;

Figure 2 is a similar view with the valve in the position which it occupies during the intake, the valve element being shown in elevation;

Eigure 3 is a section on the line 3-3 of Figure 1; Figure 4 is ay section on the line 4.-4 .ure 1. Referring now more particularly to the drawings, the numeral 10 generally designates a valve barrel having at one end. thereof an axial port 11, the inner end of which iS formed as a valve seat 12. In the side wall, the barrel is formed with radial intake and exhaust ports 13 and 14, which communicate with annular passages 15 and 15a respectively formed in the wall of the barrel. These 4" annular passages in turn communicate with the bore 16 of the barrel`through radially directed ports 17. At its head end, the barrel is provided with a bonnet 18 which is removably secured thereto, as at 19, and is provided with an axial packing gland 20. Slidpf Figthey 1928. Serial No. 272,485.

able in the bore of the barrel is a piston valve, generally designated at 2 1, which is provided withl circumferentially extendin packing elements 22 arranged in spaced pairs. These pairs are so spaced from one another that in the closed or exhaust position of the valve,

lay at opposite sides of the circumferential rows ofradial ports 17, placing the annular passages 15a in communication with the bore of the barrel.

The inner end of the valve is formed with a seat 23 which, with the valve in this position, engages the valve seat l2 and seals thereagainst. The outer end of the barrel has a stem 24 attached thereto which extends through the packing gland 20 for engagement with an operating element (not herein Shown). Between the inner end of this valve and the head 25 of the bonnet, a spring 26 extends, which constantly urges the valve to the exhaust position.

The body of the valve is provided with an axial bore 27 opening through the inner end 7thereof and' at its outer end communicating with the space between the bonnet and the,l valve through ports 28. Thefside fwall of the valve is provided with y,port when the valve 23 is engaged iwi align with the ports 17 ofth nel 15a.

It will be obvious that wh y valvelis withdrawn againstithe spring to placefthe ports 17 of the channel 15 in' nmunication with the port '11 and thus placejtlheports 13 and 11 in communication, fiuidtpressure'lentering through the port 13 willipass Ato the port 11. It will also pass throughjthe bore 27 of the valve and ports28 tothe -bonnet 18, so that pressure against opposite ends of the valve vis lequalized and upon release 'of the stem 24, the spring 26 will close the valve 23 against the seat 12, cutting oli the intake of fluid and placing the ports 11 and'14 in communication through ports 29 ofthe valve and the ports 17 of the channel 15a of the valve body. At the same time, fluid pressure v produced in the bonnet is relieved through the ports 28, so that the pressure in this chamber reduces to the exhaust pressure andl the equalization of pressures upon the valve maintained. Such a valve may be ver'y readily produced and being extremely simple in lits construction is not llkely toget out of UY( 0l'.

Since the construction hereinbefore set `forth is capable of a certain range of change and modification Without materially departingr from the spirit ot the invention, I do not limit myselfl to such specific structure except as hereinafter claimed.

I claim In a valve, a barrel provided at one end with an axial port and provided between its ends with longitudinally spaced intake and exhaust ports, the barrel being provided with annular passages communicating with the intake and exhaust ports and with annular series ofv radial ports communicating therewith and with said axial port, a bonnet secured to the other end of the barrel, an annular valve scat within the barrel about the axial port, a piston slidable within the barrel for adjustment into closed or opened position and provided ,'with a longitudinal bore opening out through its inner and outer ends and in constant communication with the bonnet and axial port, the piston extending across one of the annular series of radial ports when in closed position and having its inner end arranged between the series of these ports when in opened position, the piston being provided with radial ports communicating with the bore and communicating with one ot' the series of radial ports when the piston is in closed position, and an annular seat on the inner end of the piston contacting with said first seat when the piston is in closed position.

In testimony whereof I affix my signature.

JOI-IN WILSON TUKER.

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