US1326938A - Valve - Google Patents

Description

J. B. KNUDSEN.

VALVE.

APPLI'CATION FILED JAN. x9, 191s.

1,326,938, Patented Jan. 6, 1920.

i0 Z a 50 Q STATES JACOB IB. KNUDSEN, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T0 FRANCIS H, QUAIL, OF CHICAGO, ILLINOIS.

VALVE.

Application filed January 19` 1916.

To all whom t may concern.'

Be it known that I, JACOB B. KNUDsnN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Valves, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to valves, and more particularly to valves for use in the confinement of gas under pressure.

It is one of the objects of my invention to provide a packless valve in which the danger of leakage, either through the bonnet or the outlet, is removed.

I have described in the following specilication and illustrated in the accompanying drawings embodiments of my invention, it being understood that changes maybe made in the form, construction and arrangement of the parts Without departing from the spirit of my invention or exceeding the scope of the appended claims, the forms herein disclosed being merely preferred embodiments thereof.

In the drawing- Figure 1 is a vertical cross sectional vieW of a valve constructed in accordance with my invention;

Fig. 2 is an enlarged cross sectional vievv of a portion of Fig. l, thesection being taken on the line 2-2 of Fig. 1, looking in the direction of the arrows; and

Fig. 3 is a vievv similar to Fig. 1 showing a modified form of the valve member there shown.

Referring to the drawing, 5 represents the receptacle in which the gas or other fluid is confined and which has an enlarged portion 6 through which is a central threaded opening to receive the threaded arm 7 of the valve casing 8. The latter is a casting substantially in the forni of a. Greek cross, the four arms of which may be designated, for convenience, as the inlet, outlet, safety out let and bonnet arms. Through the inlet arm 7 is a passage 9 Which has communication with the interior of the receptacle 5 by means of a plurality of ports 10 formed in a washerlike member 11 which is in screw threaded connection With the arm 7 and has an outturned flange 12 bearing against the end of the latter member.

.Speccation of Letters Patent.

Patented Jan. 6, 1920.

Serial No. 73,005.

In communication with the passage 9 are the discharge port and a safety port. Opening into the passage 9 and forming, in effect, a continuation thereof, and of a cross section substantially smaller than the same, is a passage 13 through the casing member and opening into a central chamber 14 into which also opens a passage 15 communieating With the discharge port 16. This port and passage are in the outlet arm 17 of the valve casing 8 this arm being subs antially at right angles with the inlet arm 7. The end of the outlet arm 17 is screw threaded for engagement With a receiving tank or the like.

Diametrically opposite the outlet arm 17 is the safety outlet arm 18, screw threaded at the end to receive a cap 19 in which is a safety outlet communicating with a pas sage 2G, which in turn communicates With a passage 21 opening into the main passage 9, the outlet being closed lby a thin strip of copper 22 or other suitable substance designed to blow out in case the pressure in the receptacle becomes in excess of a predetermined amount.

Slidably embraced by the Washenlike member is a valve stem 23 which has an enlarged portion 24 and a flange 25 on Which is a washer 26 of fiber, rubber or other suitable material. This flange and its Washer constitute the valve proper which engages a shoulder 27 formed in the valve casing at the point Where the restricted passage 13 and the main passage 9 meet,` said shoulder forming in effect the valve seat. Beyond the Washer 26 the valve stem has a frusto-conical p rtion 28 which is at its base of a cross 4section substantially equal to that of the passage 13, so that when the valve is displaced away from its seat the opening for the passage of the gas will gradually increase in extent. At the end of the valvestem beyond the truste-conical portion is a, cylindrical head 29 which fits snugly but slidably into the passage 13 and which is provided in its side with a plurality of `grooves 30 (in this instance, four) running from end to end, whereby the flow of gas when the valve is opened is more or less restricted inasmuch as the gas can pass into the central chamber 14 only via these' grooves. The valve is normally held closed againstits seat by a coiled spring 31 Which bears against the ange 95 ofthe valve stem and against the washer-like member 11, and by the pressure oi' the conned gas. lt is opened by means now to bedescribed.

The bonnet arm or the casing member 8, which is the arm diametrically opposite the inlet arm 7, is formed with a chamber in its outer end and from the bottom or this chamber' to the central'chamber 14 is ath'r'ea'de'd bore, in which operates a threaded stem 32. The latter, as will be seen by the drawing, extends into the` centralchamber 14, .and it is Aformed with a pointed end 38 which is received'by a depression in theend of the valve stem head 29. At the other end, this threadedI stem 32 extends beyond the end of the ,casing arm and terminates ina squared end34. `The latter is engaged by a squared socketormed in theA end of an intermediate operating and guide member 35 embraced with-in. n l threaded'to be screwed over the threaded end of the' casing arm as clearlyappears in Fig. 1. The member 35 has a downward extension in the form of a sleeve 35a` which rsurrounds the threaded stem and provides` a further guide ior the same. 'lheendl of this sleeve enters and rotates ina suit'able'groove formed in the bottom, or the casing arm chamber.` Toprovide proper joints the bonnet 3,6 has ashoulder bearing against the end of ythe casing arm, the shoulder being providedrwith an annular groove to receive. a corresponding annular ridge on the end of the .casing arm. n

The intermediate operating member 35 has a Central shank extending outward throughl an opening in the head 37 of the bonnet'. and terminating in a squared end 38 which is engaged by a squared socket in the end or anyoperatin-g `member 39. The latter is rotatablyembraced within a cap 40 whichis in threaded connection with the end of the bon not .36. `The cap 40 has an inwardly abutting shoulder engaging` a flange 41 onl the inner end of the operating member 39 ,whereby the latter is held down against the bonnet head 37. The end Vof the cap 40 is open and an annular space provides accessy to the squared end 42 of the operating member 39 wherebyy the latter may be turnedjby` means or asuitable wrench or other instrument.

lnthe .intermediate member 35 a shoulder is Jformed by reason of the shank, .and the face of the shoulder is provided with a pluralityl of concentrically arranged teeth 43. lnterp'o'sed between this shoulder and the head 37 of the bonnet is a washer 44,*which is Apreferably or a metalv softer than the metalcomprising. the engaging member so that when the shoulder bears against washer the teeth 44 are forced into the softer metal and )ormv in eii'ect a plurality of ground joints. The member 35 is held firmly up, against thel washer l43. and thereby clamps same against the bonnet head-by means the the bonnet 36 which is suitablyA of'a coiled spring 45 which surrounds sleeve 35a inthe chamber or the casing arm, and which'bears againstthe' bottom'thereofand against a .washer 46 engaging the member 35. This spring will maintain a tight joint, thus edectually preventing leakage in the bonnet.

When the operating member 39 is rotated by awrench the motion is transmitted tothe member 35 and lthence to the threaded stem 3Q as will beapparent. The latter member will have also an end/,wise movement, the squared end y34 thereof sliding in, its'guide formed `by the socket in the member 35 and the sleeve 35a. This movement or the threaded stem is transmitted to the valve stem by reason oftheir abutting ends, thus forcing the valve member, against the pressure of the spring and theconnedigas, away from it's'seat and so permitting the gas to new to the discharge port. This flow ho\.vever not be sudden andf unrestricted, tor, owing to the truste-conical shape ot the valve stem, the opening at first is very slight and only* gradually wid-ens as the stem is givenrurther displacement. Even when the valve iswide open the gas is still restricted in its flow reason of the fact that its path is through the grooves 3() in the head1 29.

The valve is closed by turning the operating member 39 in the opposite direction, this motion being` transmitted to the connecting member and thence` to the threaded stem, thus withdrawing. the latter `which permits thel valve member to return to'4 seating position' under theforce ofthespring 31, or that togetherfwitliy the pressure of the gas, in case any remains.

In Fig. 3 l have disclosed a modification or my4 invention which has a ground valve memberinstead of .thev flange seating member above described. The enlarged portion 24 of the valve stem 2? has a flange 50 with a downturned edge 51, .the coiled spring 31 bearing ,against this flange. Beyond the latter the valve stem is rusto-concal in shape., the base being of Vav cross section substantially greater than thatl of the passage 13, so that as the spring' 31 and the gas pressure force the valve' againstV the edge oi the shoulder, the ground conical surface effec tua'lly closes the passage. In other respects this form ,of the invention is like the form just desori'bed.

. The construction or the bonnet and its associated parts is such asto prevent leakage in thebonnet when'gas is flowing. Fun therniore, leakage :tromthe receptacleis prevented ;eii'ectively because; of the valve constructionwand ,the fact y that itV is opened a gain tlthe pressure and held shutin amanner h thatfthe vilessure aids rather than op.1 oses, instead orbeingi mechanically held closed 'against the pressure. And it will be noted that ,the greater the 4pressure thev more firmly the valve vis held against its seat. As

a result of such a construction there is no strain on the threads of the stem 33 so that the latter will not work loose, and the consequent necessity of frequently tightening the operating member is removed. Also there are no parts or joints to become loose by the jarring and rough handling which the receptacle is likely to undergo in transportation and the like. So it will be seen that by my invention I have provided a packless, non-leakin g valve, a valve in which the operating member is mounted on the bonnet independent of the valve stem, and one in which sudden and unrestricted flow of the fluid confined is prevented.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is l. In a pressure tank valve the combination with a valve casing of a removable bonnet therefor, a valve seatingl with the pressure mounted in said casing, a threaded stein bearing at its lower end on the valve stem and having an irregular shaped upper end, a rotatable member in the bonnet having a shoulder at its upper end seating on an interior shoulder on the bonnet and provided with an irregular shaped extension projecting through the bonnet, said member having an irregular socket for the reception of the irregular end on the threaded stem and a rotatable vertically stationary operating member mounted on the bonnet and having an irregular socket for the irregular shaped end oi said rotating member.

2. In a pressure tank valve, the combination with a valve casing of a removable bonnet therefor, -a valve seating with the pres sure, a stem threaded in said valve casing and having an irregular shaped upper end, a rotatable member in the bonnet having a shoulder at its upper end seating on an interior shoulder on the bonnet and provided with an irregular shaped extension projecting through the top of the bonnet, said member having an irregular socket for the reception of the end of the threaded stem, a coiled spring for holding the shoulder on said rotating member seated, a rotatable, vertically stationary operating member mounted on the bonnet and having an irregular socket for the irregular-shaped eXtension of the rotating member, the valve stem and threaded stem being structurally disconnected but operatively connected.

3. In a pressure tank valve, the combination with a valve casing having an enlarged recess in its lower end communicating with an exit passage, a valve member mounted in said enlarged recess andy having a frustoconical portion extending into the exit passage, a shoulder on said valve, a closure plug for said recess having apertures for the passage of the tank contents, a downwardly extending stem projecting through said plug and g'uiding said valve member, a coiled spring interposed between the shoulder on said valve and said plug for holding the valve in position, an upwardly projecting extension on said valve member, a threaded stem mounted in said casing having its lower end bearing upon said extension and having an irregular shaped upper end, a bonnet for said casing, a rotatable member in said bonnet having a shoulder at its upper end seating against an interior shoulder in said bonnet and provided with an irregular shaped socket for the reception of the irregular .shaped end of the threaded stem, a coiled spring holding the shoulder on said rotatable member in seated position, said rotatable member having an irregular shaped proj eetion extending through the bonnet and a vertically stationary rotatable operating member mounted on said bonnet and having an irregular shaped socket for the reception of said irregular shaped projection on the rotatable member.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses. v

ALBERT R. VmsE, A. E. RosENTHAL.

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