US1752667A - Valve - Google Patents

Description

April 1, "1930. J. L. HUTcHlNGS 1,752,667

' VALVE Filed Nov. 2, 1927 @QQ/f,

m m I l 'iQini y lull Will/QI ATTORNEYS Patented Akpr.V 1, 1930 JOSEPH L. HUTCHINGS,

F CLEAN, NEW YORK VALVE Application led November 2, 1927. Serial No. 230,419.

This invention relates to valves and has for its object the provision of an improved drain valve, and particularly a. valve which is adapted for use in connection with tank cars 6 and liquid storage tanks.

Tank cars and liquid storage tanks are generally provided with drain valves positioned adjacent the bottom walls. These valves are usually provided with inlet ports from which the flow of liquid is cut ofi' by means of a movable member having a ground surface which is adapted for contact with a second ground surface, or valve seat, formed on a portion of the body of the valve. `Many of the commercial li uids, such as oils and acids of various kin s, contain small amounts of suspended solid matter which settle to the bottoms of the containers when the liquids are allowed to stand in the containers for any considerable period of time. This sediment, which usually flows from the container near the end of the draining operation, sometimes forms a deposit on the valve seat or on portions of the valve adjacent the valve seat and prevents contact of the ground surface of the movable member with the valve seat. Consequently it is sometimes impossible to close the usual valve in such a manner as to prevent leakage after the complet-ion of the drainage operation or immediately before reilling the container.

Various means have been suggested for eliminating this accumulation of sediment from drain valves. In some instances the valves are attached to the containers in such a manner that lowermost portions of the valve inlet ports are positioned above the lowermost portions of the inner surfaces of the bottoms of the containers, and the ground surfaces are so located that they do not come in contact with the sediment contained in the lower strata of the liquid. This practice is objectionable as it prevents complete draining of the containers and it does not completely eliminate the diiiiculty, as the sediment eventually builds up to such a height in the containers that it may enter the valves with the usual detrimental results.

The improved valves of my invention are 5 provided with means which are e'ecteive in removing the accumulation of sediment from the valve seats and adjacent portions oi the valves as the valves are manipulated during normal closing oprations. Thus, my'improved valves may be attached to containersin-such a manner that the lowermost portions of the valve inlet ports are positioned below the lowermostJ portions of the bottoms of the containers and the entire contents of the con-v tainers may be removed during draining 0perations without danger of accumulations of sediment preventing eecting closing.

In the accompanying drawings'in which is shown one of the various possible Vembodiments of my invention,

Figure 1 is a sectional elevation taken substantially through the center of the valve, and showing the valve attached to a container; and Y Fig. 2 is a bottom view of the closure member, showing the valve face and the teethfor removing accumulations 'of sediment from the valve seat and portions of the valve body adjacent thereto.

Similar reference characters referto simi lar parts throughout the several views of the drawings. v

The valve comprises a substantially tubular body member 10 having an externally threaded lower end portion and a flanged upper end4 portion. The upper end portion of the body member 1() is internally threaded, and a nipple 11 having threaded end portions is mounted therein. -The nipple 11 extends above the upper end of the body member `10 and forms a guide for an internally threaded cap or closure member' 12. An annular recess 13 is formed in the upper, iianged end portion of the body 4member 10 substantially concentric with the nipple 11. The nipple 11 forms the inner wall of the recess 13 and it is provided with openings 14 which form inlet ports for the valve. The lowermost portions of the inlet ports 14 are substantially even with the bottom of the recess. The outer Wall lof the recess 13 is ground to provide a surface 15 which Aforms va seat for the valve face` 16 formed adjacent the lower endvof the closure member 12. F our teeth orV blades 17 are formed integrally with the closure member 12 and depend from the lower end thereof. The teeth 17 are so formed that their edges 18 extend radially and lie in contact with the bottom of the recess 13 when the closure member 12 is in its lowermost position in which the valve face 16 is in contact with the valve seat l5. The portions of the teeth 17 between the edges 18 are beveled upwardly. Thus, the lower surfaces of the teeth 17 are spaced above the bottom of the recess 13 for all positions of the closure member 12, and the edges 18 may be relatively sharp and capable of cutting relatively hard deposits of sediment which may form on the bottom of the recess 13.

As shown in Figure 1, the assembled valve may be attached to a container by means of rivets 20 extending through the flanged upper end portion of the body member 1U and the bottom wall 21 of a container. When the valve is in position on a container, the nipple 11 extends into the container and the valve seat and lowermost portions of the valve inlet ports are positioned below the inner surface of the bottom of the container. A rod for opening and closing the valve is attached to the closure member 12 by mea-ns of a bolt 23 extending through an aperture in the rod and apertures in the lugs 24 formed integrally with the closure member 12. The rod 22 may extend to any suitable point adjacent the top of the container.

A cap 25 may be mounted on the lower threaded end portion of the body member 10 to protect the threads and to prevent loss of the contents of the container in the event that the valve is accidentally opened. The

cap 25 may be attached to a stationary part of the container by means of a ring 26 and chain 27.

The valve face 16' may be moved into and out of contact with the valve seat 15 by manipulating the rod 22 and moving the cap or closure member 12 along the nipple or guide member 11. Any sediment which is deposited on the bottom of the recess 13 between the inlet ports 14 will be moved along ahead of the teeth 17 and forced out through the ports 14 when the valve is closed immediately after a draining operation and before the lower cap 25 is placed in position. If the cap 25 is placed in position before the valve is closed, the valve may be filled with liquid which is slow in draining from the container. In that event the teeth 17 upon entering the liquid contained in the recess 13 will act as agitator blades causing any sediment which might be deposited in the recess 13 to again become suspended in the liquid to form a thin paste which may easily be forced out of the recess 13 as the lower end portion of the closure member 12 enters. If, at any time, a relatively hard deposit of sediment is formed in the recess 13, the valve may be filled with liquid and the closure member 12 may be manipulated until the sediment is loosened and broken up and a thin paste which may be readily forced out of the recess is formed.

As many embodiments might be made of the above invention and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I claim:

1. A valve comprising a substantially tubular body member having an annular recess formed in an end thereof, a portion of the outer wall of said recess being formed to provide a valve seat, an externally threaded nipple projecting from the recessed end por tion of said body member, an internally threaded closure member mounted on said nipple for movement into contact with said body member, said closure member having a surface for engaging said valve scat, and an annular row of teeth carried by said closure member and adapted to ent-er said annular recess as the closure member is moved into contact with the body member.

2. A valve comprising a substantially tubular body member having an annular recess formed in one end thereof, a nipple fixed to said body portion within said recess and having an opening therethrough communicating with the interior of said body portion, a closure member mounted on said nipple for movement toward said body member and hav ing a surface for engaging said recess, a plurality of depending teeth on said closure member adapted to enter said recess and force sedi* ment therefrom through the opening in said nipple when the closure member is moved into contact with said recess.

In testimony whereof I ai'liX my signature.

JOSEPH L. HUTCHINGS.

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