US1769026A - Reducing valve - Google Patents

Description

Jul 1, 1930. A, HM 1,769,026

REDUCING VALVE Filed A ril 12, 1928 PIE" 1 fiRTHUR HILL,

. municating means for openingan'd closing Patented July 1, 1930 A 1 v ARTHUR HILL; or CLEVELAND, enrol REDUCING i w v Applieation. filed 'April 12, a." seriar'nb; 269,355.

.My invention relates to pressure reducing valves and more particularly to automatic pressure reducing. valves such as generally used for, reducing the pressure between a .high pressure supply source steam, gas, air

or water) and a number 0 low pressure working'units and tanks connected therewith and fed thereby. t

The object of myinvention is a new valve unit readily adjustableto any desired pressure in which the movable parts without sticking readily correspond to very slight pressure variations so thata predeterminedf' lower pressure can practically be maintained-unvaryin'gly. i

A further objectof my invention isto provide a reducing valve unit of simple and sturdy construction "with a main'passage controlled by a piston, rectangularly arranged to said passage and including com said main passage.

Still further objects' of my invention will more readily beunderstood as describedin 'theifollowing description of, the drawings and as called for in the claims;

In the accompanying drawmgs; F1g.. 11s

a plan viewoi my reducing valve andFig. 2 a longitudinal section'partly in elevation on line22 of Fig. 1. ,Fig.3 isacross section -on line 33 of Fig. 2,2 showing theby-passy in. cross section. Fig. 4 is a cross section on line 44 of Fig. 2, and F g. 5 '1S3 cross section on line 55 of F1g.' 2 SllOWlIlgj the valve body insideelevation and Fig. 6"isa side elevation of the piston member.-

my reducing valve embodies a. cylindrical" V chamber 3 closed at la'nd open at 5' and ,40

- a purposelaterito bed'escribed.

As sl1own,-themain body or casing 2 of said body 2 is providedwith integral. oppositely connected to pipes. Extensions 6 and 7 include openings 8 and 9 rectangularly arranged to the main axis'of chamber 3-, so

7 that said extensions 6 and 7 iormoutlet and inlet respectively for the valve unit. While 1 opening isiofcircular cross sectionyopenng'8 1s of oblong shape as shown t 10 for at 14 xtoprovide a communicating space beengaging the closed side of-ibody2'tofpenarranged. and outwardlyi screwthreaded extensions 6 and 7, adapted to 'be' piston member (see Fig 6) 12'slidably confined within chamber 3 covers both said openings 8 and9 and is externally grooved tween inlet and: outlet openings 8 and 9, when said grooved portion 14 is aligned therewith, so that a fluid or air stream may freely pass through valve body 2. I Piston member 12is hollow at both ends and pro- :vided with a tongue portion '13 at one side;

mitfalignmentof grooved portion 14 with h0les-8 and 9' when said valve isflnot oper- 'ated. Cacing 2 also shows'a communicating opening or *by-pass 15 connecting 9 overfthe I closed end-of body 2 with the corresponding hollow chamber 16 of piston 12 sothat any back pressure in outlet opening 9 is com municated through by-pass 15*to chain-Q.

'b-er 163and tendsto" move piston 12*until grooved portion 141ofsaid=piston-is moved;

out 'of-al-ignment withinletand outletopena P I ings{8and9, andthereby the source of supplyisfcutoflf.

extending lever portion 19 0f yoke-shaped:

form at 20' and is slotted-at 21 for sliding 1 engagement with a pin22 rigidly connected 1 "by i a rod' 23: with piston 12; SOwthah any later al= movement orshifting of piston .12 is counteractedfbyi "beam 17. As' shown a j weight 24 is slidablyfsupported ion. beam '17 j i and-such weightmay'be' shiftedbyturnfing ofafscrew-rod 25 rotatablyconfined within beam g-lT 4 and- "screw-connected with said i weigl1t24; A scale 26 on beam l'Z'indi'cates I Jtheamount o'f theyshifting of said weight '24 and 'such a scale may be divided to indicate the pressure to which the valve is set.

\ The operation of the valve is absolutely and "automatically controlled by the move ments ofthe piston-12, but assuming that the valve is shifted and thereby closed the high pressure on the. intake side opening 8 tends to press the piston against the outlet side thereby increasing the frictionand I decreasing the eflicien'cy of the valve; 'To'-1 00 I To counteract such movement piston 12 '75;

is vyieldinglyheld by 'a 'weightedbeam'l7 pivotally su pportediby integral ears 18 of body 2." ',Beam*17 includes a downwardly avoid such action opening 8 is of oblong cross-section at 10 about twice the diameter of the outlet and furthermore grooved portion 14 is of piston 12 is at the outlet side at 27 approximately twice the width of the grooved portion 'at the intake side at 28. Such dimensions safeguard a free floating of the piston within chamber 3under all conditions and prohibit any sticking'of the piston by extensive one-sided pressure of'said piston against the wall of chamber 3. Piston v 12 may also carry piston ringsBO to avoid any leakage if necessary and the movement of said piston is limited by part 31screwconnected to body 2.

- It is obviousthat the structure shown may be changed in form anddimensions, without departing from .thescope of the invention, and also beam 17 may be replaced by 20 a spring structure to counteract a' closing of the valve. V 7

What I claim, is: a A 1. A pressure reducing valve including a hollow body forming a piston chamber having an inlet and an outlet port, a piston member slidably confined within said chamher for controlling said outlet port; a grooved portion of variable width on said piston member and aligned with said inlet and, outlet ports, a by-pa-ssconnecting the outlet port with one end of said piston chamber; andmeans to yieldingly'counteractany lateral movement of said piston by back-pressure from the outlet port,- said grooved portion: 011 said piston member belet port thanat the'side of said inlet port. 7 2; A pressure reducing-valve includinga v hollow body forming a piston chamber open a 40 atone end, an inlet andoutlet port aligned with each other-and rectangularly arranged to and for said piston chamber a piston 'member slidably con-fined withinsaid cham- 7 ber,-,a,grooved portion on said piston member Y l aligned with said inlet and outlet ports, 7 and being-of variable width, a by -pass connecting the 'outlet po'rt with one end of said piston chanibertand means to yielding- V V I 1y counteract any lateral movement ofsaid '5 piston by back-pressure from'the outlet port, H

the grooved portion on said piston member being of larger width" at-saidroutlet port than at the side of said-inlet port and the inletport being ofelongated and of larger crosssection than said; outlet port to equalize H thepressurecircumferentiallyof the piston at the inlet port under all conditions.

In testimony whereof I aflix my signature. I ARTHUR HILL;

.ing of larger width at the side of said outi g r i l

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