US 970348 A
Description (OCR text may contain errors)
W. L. OSBORNE. RELIEF: 0B SAFETY VALVE. APPLICATION FILED NOV.12,-1909.
Patnted Sept 13,1910.
(wimp L 0560177 I WM UNITED STATES PATENT osFxc-E.
WILLIAM. L; OSBORNE, OF -(IHIGAGO/ ILLINOIS.
' .aaLmr on sararr VALVE.
' Specification Letters Patent. applioatlon filed November 12,1909. Serial No. 527,688.
To all whom it min comm:
Be it known that I, WILLIAM L. Oseomm, a citizen ofthe United States, and a resident of Chicago, in the county of Cook and State of *Illinoisyhave invented certain new and useful Improvements in Relief or SafetyfValves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference. marked. thereon, which form a part of this specification.
This invention relates to an improved r'e-. lief or-safety valve of that kind employing a spring "for. normally holding the valve u on its seat, and against the action of w ich the valve'is lifted from its seat ,when
pressure on the under side thereof exceeds a predetermined limit. @The mventlon consists of the matters heremafter, 'set forth and more particularly pointed out in'the appended claims.
Among the ob'ects of the invention is to provide means w ch rmits the valve piece to be separated from its seat, either for the purpose ofinspecting, repairing or cleaning the valve or 'for the u so of din ,the valve seat, without I rpo gun g osing the normal compression of the spring, thereby enabling the valve to be thereafter readily assembled or adjusted for use. In this manner the time F uired for assembling and adjusting the my invention. Figs. 2 and 3 are transverse sections on the lines 2-2 and 3-3 res eetive'ly, of Fig. 1, looking downwardly, ig. 4 is a frgigentary vertical section of a slightly m ed form of valve to which my invention may a ply.-
Asshown n igst 1, 2 and 3 of the drawings, the casing 10 of the valve is provided with a flangedLmlet branch 11 and a flanged outlet branch '12, each adapted to be connected any suitable manner with the piping or fittings with which the valve is associated.
The said casing as herein shown comprises a central or main bod portion 14 into the lower end of which e branch 11 extends and with which it has screw-threaded connection, and a cap portion 15 which fits over and has screw-threaded connection with the upper end of the casin body 14. The upper end of the flanged ranch 11 is countersunk and threaded to'receive wring-16 which is formed to provide an annular tapered valve seat 17.
18 designates a valve-piece having a conical or-tapered seating. ace 19 for enga ement with the annular seat 17. ,Said va ve iece is 'formed with guide wings 20 which lit closely within the passage of the inlet branch 11.
21 designates a stem extendin upwardly from the valve pi? into the 'c amber inclosed by the ca The stem is provided with a rounded ower end 23 which extends loosely into an upwardly opening recess 24' of the valve piece. The said stem is provided just above its rounded bearing and with a thickened portion or head 26 of angular cross section .which loosely fits in an angular socket 27 formed in the valve piece above the recess 24. The construction described aflords an interlocking connection between the stem and valve-piece by which thevalve piece may be rotated through power applied to the stem. The stem is provided wit an upper squared end 28, adapted for engagement by suitable implement to turn the same.
Loosely surrounding the vali e stem-1s a sleeve 30. The lower end of the sleeve s provided with an annular tapered bearing. surface that fits a conical seat 32 formed on the up er side of the head 26 of the valve stem, t e engaging surfaces being such that the stem may turn in the sleeve. The upper end of the sleeve is reduced at 33 to provide abearingfor the upper end of'the stem, and the stem is maintained by "its upper and lowerobearings in the axis of the sleeve. 35 designates an exterior-1y screw- .threaded, tubular nut which loosely sursion spring 89, the-function of'which 18 to ems compressed between the nut 35 and the flange 37 by screwing the nut downwardly into the casing and the compression of the spring is transmitted to the valve piece through the headed lower end of the stem the locking nut is to draw the sleeve 30 to. hold it against its seat., A joint nut 40, which surrounds and is screw-threaded to the tubular nut .35, bears against the upper end of'the' casing body and serves to lock the adjusting nut 35 in any position of adjustment. I
Located above the adjusting nut is an interiorly screw-threaded spring locking nut 42 which fits over and has screw-threaded connection with the upper end of the sleeve above the adjusting nut 35 The said nut 42 bears at its lower end against the'upper end of the adjusting nut 35. As herein shown the nut 42 is provided on its lower end withan annular flange 43 which 'fits into an annular rabbet in the upper end of the adjusting nut 35 and is provided with a downwardly facing shoulder 44 which bears against the upper end of-said adjusting nut. Both the ad usting nut and the locking nut :are formed with exteriorly polygonal upper ends, as shown in to enable them to be readily engage wrench or like instrument to turn the same.
In the ordinary or usual use of the valve,
made as described, the spring 39 is maintained, through the action of the adjusting nut 35, under the proper tension to hold the valve upon its seat against a-predetermined pressure beneath the same, and this com-' 42 is screweddownwardly on the sleeve 30' against the adjusting nut 35. The action of upwardly through the adjusting nut and thereby compress the spring 39' between the u wardly moving flange 37 and the fixed a utment or nut 35, A slight additional compression of the spring brought about in this manner is sufici'ent to ease the valve iece off its seat so that it may be turned on its seat for the purpose of grinding, the seat,
' the arrangement being such that the valve piece and stem are movable independently of thevalve stem. Moreover the casing may be dismantled and the seat-removed away from the valve piece without releasing the -compressive force of the spring-39. This is due to the fact that said spring is-confined between the adjusting nut 35, that is screwthreaded to the casing, ,and'the flange 37- of the sleeve, which flange is held up against screwe threaded locking nut 42 which bears against the spring through the action of the screwthe upper end of the adjusting nut. The valve piece and stem are free to be rotated an abradant may be applied to the seat'preparatory to grinding t e'same. After the valve seat has been ground, or after .the valve piece hasbeen replaced and the valve assembled in the 'event of a renewal or repairin% of the valve, the locking nut 42 is upwardly away from the adjustin nut, which permits the sleeve 30 to'descen under the action of the spring 39, and trans mit the original com ressive force of the spring, through "the eaded stem, to the valve piece and thereby hold the valve piece on its seat; spring may be to some extent usedto press the valve piece against its-seat when'grinding the seat. 1
My improvements are equally well adapt-f ed to other forms of valve, as for instance the-form shown in Fig. 4 in which the valve piece 50 has a soft metal facing ring 51 adapted for engagement with the valve seat.
Furthermore the various structural details If desired the force ofthe of the valve may be varied within the spirit a and scope of my invention, and the'inven tion is not limited to such details exoeptflas hereinafter made the subject of specific claims.
I claim as my invention: 1. In a relief or safety valve, theeombinationwith a valve 'piec its seat and a v spring for pressing the va ve pieceagainst its seat, of locking means for maintaining the seating force of thespring while permit- ;ti-ng free separation or relative movement of the valve piece and seat 2, In a relief or safety valve, the combinatlon with the valve casing provided with a valve seat, a valve-piece and a spring for pressing the valve piece against its seat, of means within the casing for locking the spring under hlgher than its normal compression, arranged to perinit separation of compressive force of the spring. a 3. In a relief orsafety valve, the combination with a valve piece, its seatand a the valve piece and seat without losing the nation with a valve piece, its seat and a spring for pressing the valve piece against.
its seat, of screw threaded means for easing the spring away from the valve seat and for locking the spring under at least its maximum compression.
In a relief or safety valve, the combination with a Valve piece, its seat,'a spring for pressing the valve piece against its seat and adjusting means acting on the spring for varying the seating force of the spring, of means cooperating with said adjusting means for easing the spring away from the valve seat and for locking the spring under compression.
6. In a reliefor safety valve, the combination with a casing provided with a seat, a valve piece engaging the seat, a spring for pressing the valve piece against its seat, and screw-threaded adjusting means carried by the casing for varying the seating force of the spring, of means cooperating with the adjusting means for easing the spring away from the valve seat, constructed to lock the spring compressed and permit the valve to be disassembled without losing the compressive force of the spring.
7. In a relief or safety valve, the combination with the valve casing provided with a seat, a valve piece, a stem made separate from the valve piece and interlocked there to, whereby the valve piece may be rotated by power applied to the stem for grinding the seat, and a spring acting through said stem to press the valve piece against its seat, of means for locking said spring under compression arranged to permit the valve piece to be eased away from its seat and to be separated therefrom without losing the compressive force of the spring.
8. In a relief or safety valve, the-combination with a valve casing provided with a seat, a valve ,piece, a stem made-separate 7 from and bearing against the valve piece, a spring acting, through said stem, to press the valve piece against its seat, and adjusting means carried by the casing for adjusting the compression of sald spring, of means cooperating with said adjusting means for easing said spring away from the valve piece and for holding said spring under compression. I
9. In a relief or-safety valve, the combination with a. casing provided with a seat, and a valve piece engaging said seat, and provided with astem, of a sleeve surrounding the stem and bearing at one end against a shoulder on the stem, a tubular ad usting nut surrounding the stem .and ha'vingscrewthreaded engagement with the casing,- a spring interposed between sald ad ust ng nut and a flange on said sleeve for pressing the valve piece against its seat and a nut having screw-threaded engagement with the upper end of the sleeve and having rotatiVeengagement with a shoulder on the adusting nut.
10. In a relief or safety valve, the combination with a casing provided with a. seat, and a valve piece engaging said seat, and provided with a stem, of a sleeve surrounding the stem and bearing at one end against a shoulder on the stem, a tubular adjusting nut surrounding the stem and having screwthreaded engagement with the casing, a spring interposed between said adjusting nut and a flange on said sleeve for pressing the valve piece against its seat, and a nut having screw threaded engagement with the upper end of the sleeve and having rotative engagement with a shoulder on the adjusting nut, said stem being separable from the valve piece and arranged to be interlocked thereto so as to rotate the valve piece.
11. In a relief or safety valve, the combination with a casing provided with a seat, and a valve piece engaging said seat, and provided with a stem, of a sleeve surrounding the stem and hearing at one end against a shoulder on the stem, a tubular adjusting nut surrounding the stem and having screwthreaded engagement with the casing, a spring interposed between said adjusting nut and a flange on said sleeve for pressing the valve piece against its seat, a nut having screw-threaded engagement with the upper end of the sleeve and having rotative engagement with a shoulder on the adjusting nut, the casing being provided adjacent to said seat with an opening, and a removable plug for closing said opening.
12. In a relief or safety valve, the combination with a casing-provided with a seat, and a valve piece enga ing said seat, and provided with a stem, 0 a sleeve surrounding-the stem, the stem being provided with a conical shoulder and the sleeve being provided at one end with an annular bearing adapted for rotative engagement with said shoulder, and the sleeve being restricted at its other end to provide a bearing for said stem, a tubular adjusting nut sermwthreaded to the casing through which the sleeve extends, a locking nut screw-threaded to the sleeve and having rotative bearing engagement with the adjusting nut and a spring interposed between said adjusting nut and a flange on said sleeve.
In testimony, that I claim the foregoing as my invention I atlix my signature in the presence of two witnesses, this 8th day of November A. I). 1909.
\VILLIAM L. OSBORNE.
,lVitnesses WILLIAM L. HALL, GEORGE R. VVILKINs.