US715578A - Valve. - Google Patents

Description

Nu. 7I5,578. Patented Dec. 9, |902.

W. HESTON.

VAL-VE.

(Application led July 21, 1902.)

(No Model.)

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WILLIAM HESTON, AOF HOMESTEAD-,2 PENN SYLVANIA.A

VALVE.

SPECIFICATION forming part of Letters Patent N0. 715,578, dated December 9, 1902.l l

. the following is a full, cleaigand exact descrip'- which issirnple and cheap at first cost, in,

tion, reference being had to the accompanying drawings. i v

This invention relates'toa valve or cock especially adapted for use where very high pressures are employed, the primary object of the invention being to `provide a construction by means of which leakage under any` circumstances may be prevented.v y

Another object of the invention is toy providea structure of the character specified which wear of moving parts may be easily and quickly taken up, and in which wearupon the valve-plug and its seat will be minimized, because the plug will be locked to its seat as wellwheu the valve is opened as when it is closed.

The invention is more Vparticularly described hereinafter and may be here summarized as consisting of the combination of parts described in the following specilication, as set out definitely in the claims. t

' In the drawings, Figure l isaside View of a valve embodying my invention. Fig. 2` is a central longitudinal section thereof. Fig. 3 is a plan View of the valve withA the adjustable abutment in the yoke removed. Figs. 4 and 5 are respectively face views of the cams in their preferred form, which serve to force the valve-plug to its seat.

Referring to the parts by letters, A represents-a casing having a central conical well a, which servesas the seat ofthe conical valveplug B, which is titled thereto. This casing has-on opposite sides of this valve-seat two openings a a2 for the entrance and exit of the liuid. The valve-plug has a port h through it, which may by the turning of vthe Valveplug be brought into alinement with these two openings do?, in which case the valve is opened, or into a position at'right angles to the alined position, in which caseythevalve is closed. y

l A cap C closes the opening inthe top of the valve-casing, through which the valvep1ug is inserted, and this cap has a properly-placed stuling-box through which the cylindrical Serial No.116,344. (No model.)

portion bo'f the valve-stem passes. This cap is preferably screwed into the opening in the valve-Casin g. v v

D represents a yoke which is secured to the v valve-casing by thebolts I and whichextends across the axial line of the valve-plug and at such distance from the stuffing-boxes may be necessary for the accommodation of the co'p,

erating cams by which the valve is crowded l against itsseat. Through that part of the yoke which is in axial line with the valve-plug' is av with it, is the hub'yl of the operating-handle.

J ,and the lower face of this hub bears against the shoulder b5 ou the valve-stem formed by squaring the same. The upper or outer face ot' this hub is provided withinclines or cam surfaces y2, which engage with corresponding cam-surfaces h'onthe lower or inner face of the cam-plate H. In the preferable construction these engaging cam-surfaces on the hub and cam-plate,respectively, are oppositely inclined from two diametrically opposite points, k

substantially as shown. f

The valve shown `is'an ordinary straight-` way valve, which may be closed by turning it ninety degrees from the position in which it is fully open. r

The parts having been assembled, the opl eration is as follows: When the valve-is being closed by the movement of the handle, the movable cam-surfacesj2 -that is, those surfaces on the handlehub-so move'with respect tothe non-rotating cam-surfaces h on the cam-plate H that the high points of each' engage with 'the low points of the other, and therefore the valve-plu'gB is allowed tomove slightly from its seat. As the valve comes to its closed position the high points on said cam-surfaces engage, whereby the valve-plug is forced down firmly against its seat. This makes it absolutelyA impossible thatf there shall be any leakage of the :duid past said valve and also that any sediment shall deposit itself between the valve and its seat. If one now turns the handle in the reverse direction, the first movement of the movable cam allows the valve-plug to move from its intimate contact with its seat and to be easily turned; but as the plug nears the open position the high parts of the cam-surfaces again engage, with the result that when the valve is completely opened it is again crowded against its seat. The result is increased durability, because it is practically impossible that any sediment or impurity in the fluid shall find any lodgment between the-valveplug and its seat, either when the valve is opened or closed.

It is obvious that the thrustot' the movable cam-surface against the non-rotating camsnrfaces is borne bythe adjustable abutmentplug E referred to, wherefore as the engaging cam-surfaces wear or as the valve-plug and its seat wear one may by the adjustment of this abutment-plug take up this wear, so that the valve will be opened or closed, respectively, when the handle is in the usual and desired positions.

i K is a jam-nut screwing onto the projecting end of this abutment-plug, hymeans of which when the plug is properly adjusted it is immovably held.

Having described my invention, I claim* l. The combination of a valve-casing having suitable inlet and outlet openings, and, between them, a conical valve-seat, with a conical valve fitted thereto and having a stem projecting out of the valve-casing, and a yoke secured to said valve-casing, oppositely-inclined cams secured to and rotating with said valve-steln, and a coperating camplate non-rotatably secured to said yoke, and having oppositely-inclined cams which coperaiivel y engage the oppositely-inclined cams secured to the valve-stem, the parts coperating to crowd the valve to its seat when the valve is open, and when it is shut, but to relieve said valve as it moves between said positions, substantially as and for the purpose specified.

2. The combination of a valve-casing having suitable inlet and outlet openings, and, between them, a conical valve-seat, with a conical valve fitted thereto and having a stem projecting out of the valve-casing, a yoke secured to said valve-casing and having an irregularly-shaped hole in axial alinernent with the valve, a cam secured to said valve-stem, a cam plate having an irregularlyshaped stem which is fitted into a correspondinglyshaped hole in the yoke and which loosely embraces the valve-stem, substantially as and for the purpose specitied. ,j

3. The combination ot' avalve-casing having suitable inlet and outlet openings, and, between them, a conical valve-seat, with a conical valve fitted thereto and having a stem projecting out of the valve-casing, and a yoke which is non-rotatively iitted into a hole in the yoke and which loosely embraces the valve-stem, an adjustable abutment-plug adjustably secured in said yoke and engaging the end of said cam-plate stem, substantially as and for the purpose specified.

4. In a valve, the combination of a casing .having inlet 'and outlet openings, and, be-

tween them, the conical valve-seat, a conical Valve-plug fitted to said seat and provided with astem having first a cylindrical portion which passes through a stufng-box forming part of the valve casing, second a squared portion, and third a cylindrical end portion, a yoke secured to the valve-casing and Vhaving, in line with said valve-stem, an opening whose inner end is squared and whose outer end is cylindrical and screw-threaded, a handle whose hub has a square hole fitted to the squared part of the stem and whose upper face is provided with oppositely-inclined cams, a cam-plate which embraces the cylindrical portion of said Valve-stein and has, on its lower face, cooperating cams, and has a squared stem projecting from its upper face into ,a square hole in the yoke, and an abutment-plug screwed into the cylindrical opening in said yoke, substantially as and for the purpose specified.

5. In a valve, the combination of a valvecasing having a conical valve-seat and one inlet and one outlet opening communicating with said valve-seat, with a conical valve fitted to said valve-seat and having a ,single port which when the valve is open establishes communication between said openings, a valvestem rigid with the valve and extending out of the casing through a stuffing-box, a yoke attached to said casing, a non-rotating camplate secured to said yoke and having on its `lower face oppositely-inclined cams, and oppositely-inclined cams rigid with said valvestem and coperating with the cams first named to crowd the valve to its seat when the valve is open and when it is shut, but to relieve said valve as it moves between said positions, substantially as and for the purpose specilied.

6. The combination of a valve-casing having suitable inletand outlet openings, and, between them, a conical valve-seat, with a conical valve fitted thereto and havinga stem projected out of the Valve-casing, a yoke secured to that side of the valve-casing through which said Valve-stem projects, a hub secured to and rotating with said valve-stein and having on its upper side oppositely-inclined cam-surfaces, and a cam-plate adjustably secured to said yoke and having on its under side coperating oppositely-inclined camsurfaces,sub stanti-ally as and for the purposes specified.

ln testimony whereof l hereunto aftix my signature in the presence of two witnesses.

' NVILLIAM IIESTON.`

Witnesses:

E. L. THURsToN, ALBERT H. BATES.

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