US1643305A - Valve - Google Patents

Description

g K r James 12. Z10, I 4 ONES.

Sept. 27, 1927. 1,643,305

J. D. LALOR VALVE Filed Dec. 15, 1924 WITN INVENTOR Patented Sept. 27, 1927.

LAND.

' 1,643,305 P'EE'Ef orrlcs;

JAMES J). LAL'OR, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE LALOE FUEL H4 SYSTEM COMPANY, INC., 0]? BALTIMORE, MARYLAND, A CORPORATION OF MARY- Application filed December 15, 1924.- Serial No. 756,000.

Such valves are useful" for example in liquid fuel feed systems to prevent oil from flowing from a gravity tank into a building should the line piping be fractured, as well a as to automatically shut off the supply when 1 the pumps'used in the system to force the fuel to the apparatus by which it is consumed-are stopped; or, in other words, to

prevent siphonic action under any of the stem 16 of saidpiston, tree positional adaforesaidsconditions.

My invention is directed toward securing in a valve of the kind referred to, absolute surety and infallibility of action; extreme simplicity of design and construction; and reliability against derangement in long continued usage. N

From the detailed description hereinafterof a typical embodiment of m invention, will be manifest how the desi erata above outlined ma be readily attained;'whi 1e the appended c aims serve to concisel define those features which I believe to e-novel and patentable. V

With reference to the drawings, Fig. I is a sectional view of a valve conveniently emso bodying my invention. v

Figs. II and III are 'detail sections taken, respectively, as indicated by the arrows H- Hand III-III in Fig. I; and,

Fi IV is a diagrammatic illustration 85 showing one of the practical uses to which 4 the-valve of my invention may be put.

In these illustrations, the body or casing of the valve is comprehensively designate by the numeral 1, and comprises a flow 4 channel-with the inlet; and outlet ends 2, 3

respectively, set apart by va partition 4; said casing bein also characterized by a lateral ofiset 5 wit anaxial bore 6 open to the outlet side .3 of the channel. This ofiset shouldered and screw-threaded at 7 for re movable attachment of a cap piece 8, which together with the bore 6, constitute a dome a Y chamber 9. The movable element of the iston M valve 1 is in the form of a cylindric 10 whereof one end is disposed for guidance in the dome bore-6, while its 0 pbsite end extends through an orifice 11 int eintermediate straight portion 12 of the partition4.

Thelatter end of the piston 10 is hollow as wherein the valve 1 s sh as interposed v ,tion is applie indicated at 13, and open to the inlet side 2 of the valve; while the wall surrounding the hollow "13 is provided with a ring of radial ports 14, which, when the piston 10 is in the position shown in Fig. I, are la ped by the partition 4 so as to close the flow c annel 2, 3 against passage of fluid therethrough. As a means for .yieldmgly urging the piston 10 to this position, :that end thereof which is disposed in the dome chamber 9 is acted upon by a helical compression spring 15, the same beingheld centralized and against undue sidewise flex'ure by an engaging axial -ton 10. As shown, the :pin 18'is threa'de as at 20 and screwedinto a boss 21 projecting from the valve body 1, a polygonal head 22 at; the exterior serving to facilitate its re-. moval when necessary -or' desired. 1 In order that thedome chamber 9 may be at all times in communication with the out-'- let side 3 of the flow channel of the valve 1, that end of the piston 10 slidable therein is longitudinally grooved as at 23 to provide by-pass channels for this purpose. p In operation it will be seenthat when sucd to the outlet side '3 ofthe valve channel, the piston 10 will be shifted in opposition to the compmion spring 15 by virtue of the access of said suction t rough the grooves'23 to that end of the piston within the dome chamber 9 so that .v

the ports 14: are moved beyond i. e. abovewith reference tothe position 0 the valve' in Fig.1) the partition 4 and thus uncovered to permit flow through the valve 1. Upon cessation of the suctlon, the spring Ili'abts ton 10 to the closed sition illustrated so as to intercept further ow through the valve 1.

" immediately toautomaticall shift the '100 5 As previously stated, the valve 1 of my mvention 1s especlally useful in connection with a fuel feed system 01 oil burning installations. To make its function clear in this connection, I vhave represented such an installation diagrammatically in Fig. IV

in'a pipe line L leading from an exterior gravity supply tank T to a pump P within a building B containing-emu different floors or levelsthe furnaces. or other apparatus to which the fuel is to be supplied under pressure. In responding to the suction or lift of the pump P, the piston of the valve 1 will shift to open position with the ports 14 uncovered for passage ofthe fluid.

When'the pump P is stopped and the suction or lift ceases, the piston 10 will, under urgence of the spring 15, automatically shift" to closed position as already explained, the spring 15 being so designed as to be capable of overcoming with a slight excess, the head pressure of the fluid in the tank T. In the event of a leak or fracture in the pipe line L,

y the valve 1, it will be seen, prevents the oil from the tank T siphoning or'flowing into ,the building B, yetpermits the pump P to feed the necessary quantities of oil to the apparatus therein. The valve of my invention thus not onl serves to obviate gross wastage of fuel under such contingencies, but also acts as a safe-guard a ainst fire. I

Having thus described my invention, I

claim Y 1. A valve comprising a casing affording a flow channel; a partition extending across the channel with an intermediate straight portion having anorifice therethrough; a dome chamber open to the outlet side of the channel; and a hollow-ended piston-havuncovered to permit flow through the valve, 7

- and in the absence of suction, to automatically shift so that said ports are brought intolapping relation with the partition to intercept flow through the valve. 1

2. A valve comprising a casing afiordmg a flow channel; a partition extending across the channel witlr" an intermediate straight portion having an orifice therethrough; a

dome chamber open to the outlet side of thechannel; anda hollow-ended piston having a ring of lateral ports afford ng flow passage therethrough with its exterior surface befiyond said ports-'longitudinally grooved to 0rd communication at all times with the outflow side of thechannel and slidably guided inthe dome chamber, the hollow end.

in the partition; said piston being adapted to respond for maintenance'in, open position with the ports therein uncovered to permit flow through the valve, to suction at the outlet side of the channel communicated to the dome chamber via the longitudinal grooves, and in the absence of such suction to shift so that said portsv are-brought into lapping relation with the partition to inter cept flow through the valve.

3. A valve comprising a casing affording a flow channel; a partition extending across the channel. with an intermediate straight portion having an orifice therethrough; a dome chamberopen to the outlet side of the channel; 'a hollow-ended piston having a ring of lateral ports affording flow passages therethrough with its exterior surfacebeyond said ports-longitudinally grooved and'slidably guided in the dome chamber,

the hollow end of said piston extending through the orifice in the partition, said piston being adapted to respond, for maintenance in open position with the ports therein uncovered to permit flow through the valve, to suction at .the outlet side of the channel communicated to the dome chamber via the longitudinal ooves; and a spring within the dome cham er functionin in the absence of suction, to automatically s ift the piston so that said ports are brought into lapping relation with the partition to intercept flow through the valve.

4. A valve comprising a casing aifording a flow channel; an orificed partitlon extend ing across the channel; a dome chamber open to the outlet side ofthe channel; a laterallyported piston with one end thereof longitudinally glrooved and slidably guided in the dome c amber, and the other end thereof extending through the orifice of the partition, said piston being adapted to respond, formaintenance in open position with the ports 'therein uncovered to permit flow through the valve, to suction at the outlet side of the channel communicatedvto the dome chamber via the lon 'tudinal grooves; a spring within the dome c amber functionin in absence of suction, to automatically shi t the piston so that said plorts are brought into lapping relation-wit the partition to intercept flow through the valveand a stop pin engaging an' axlal recess in the piston to determine the extent-of such shifting. a In testimony whereof, I have hereunto signedmy name atBa-ltimore, Maryland, this 12th day of November, 1924. Y

JAMES D. LALOR.

Images