US1757259A - Valve for controlling fluids - Google Patents

Description

May 6; 1930. y R.. E. MITTON 1,757,259

VALVE FOR coNTRoLLNG FLUIDs Filed Jan. 3, 1.928 2 Sheets-Sheet l VALVE FOR coNTRoLLYING FLUIDS Stmme Patented May 6, 1930.

UNITED s'lA'riEzfsV PATaNTfol-"FICE' RoBERr Mrr'ron, or senr LAKES CITY, tiran `VALVE FOR CONTROLLING FLUIDS Application filed January 3, 19728. Serial No. 244,223."

My invention relatesto. valves, and partie-j ularly to fluid control valves, and has for its .object to'provide a new and eiiicient control valve for fluids which will be positive in its action yet will be accurate and will control the amount ofpressure passing therethrough to the fraction of a pound. Y l

A further object is `to' provide a control Vvalve which will control the flow of uids l le therethrough and will itself be actuatedV by the back pressure of thejfluids to move the foot of the operator a suilicient amount to shut olf the pressure from the source of sup- V ply and one in which the involved air or fluid i5 pressure is controlled by the muscular action of the operator. p

These objects I accomplish with the device Y' illustrated in the accompanying drawing in which similar numerals and letters of refer- 20 ence indicate like parts throughout the sev-1 eral views and as described in the specification forming a part of thisapplication and pointed out in the appended lclaims. In the drawings, in which I have shown Y the best and most preferredmanner of building my invent-ion, Figure l is aside elevation ofthe valve. Figure 2 is a side elevation of the valve installed, showing the pressure gauge on the instrument board and the air Y supply tank. Figure 3 is a diametrical vertical 'section of the valvef Figure-1 is a side view ofthe piston which operates in the casternally threaded and the casting 2 external- Y ly threaded so that when assembled they screw together, one within the other, as shown at 2s, Figure 3, forming a cylindrical casingv with both ends closed. The saidk casting 1 5:55 is provided with a boss 3 on the bottom side' thereof, and an outlet opening 4 is provided on one side of said boss in a cylindrical boss portion 5 of the casting 1 and another cylindrical boss 5a is formed on the bottom of said casting at an angle to and adjacent the central boss 3. The eXtreme endof the said boss 5a is bifurcated into-.two spaced apart arms l 6 and 7, between which the operating lever L of the valvelis carried. The said arms '6' and 7 are centrally bored to receive pivot pins on 55 which vthe operating leverL is pivoted .and supported. The said boss 3 is centrally'bored to Vreceive a piston rod 8 longitudinally `Inovable therein. The said 'casting 2 is provided with a centrally positioned boss 9 on thetop GO side thereof, which boss is centrally bored at 12 and internally threaded to receivea closure cap 10. An air inlet bore 11 is boredon one side of said casting 2 and an outlethole 15 is Vbored through acylindrical boss 15? on one G5 -side `of the top portion of said casting. The

bore 12vis constricted, asiat 13, to form 'a valve seat 111, and the cap 10 is centrally boredkto carry a valve stem 16. A valve 17 is formed `on the end of the said stem 16 and said head 'is 70 Y longer'than the usual type cone valve and is adapted to close the valveseat 14, and another valve seat 18 at the sametime,'malring one valve close the two seats and control the pas- -sage of fluidthrough both valve seats. The

saidvalve seat 18 is formed on the top end ofthe rod 8 and said rod'is centrally bored through la portion of itslength ,at 19, with .lateralports 2() thereinlatthe bottom'ofthe hole or bore 19 to allow passage of air thereen through.V VApiston ,21 is Vsecured to the said `1od8by threads formedl on the outer side of .said rod, and a nut 22 holds said piston21 inplace` on said rod8. The said piston 21 is 'composed' of a piston block 23, having an an- S5 nular groove therearound in which an eX- panding piston ring 21-is carried and a cup leather 25vis carriedpin said casin'gbetween said Ablock 23, the ring 24g-and the inner face of saidcasing,so that expansion of the ring J0 24 will press thejcup against the sides of the casing, preventingwany passage of air therearound.. A plate 26 is provided to .holdthe said leather against the piston Yblock 23. The lowerendof the said-rod 8 is centrally vbored '95 .to receive a ball'27, which is adapted to rotate in said bore when the valve is beingv operated by the lever L. The outerfedge 28 ofthe rod 8 .is pressed inwardly around the ball to retain it in place. Nuts 29 are screwed ontothe 100- external threads of the boss a and the boss 5 to secure the said valveD in its entirety to theV dash board A. The said lever L is made as shown in Figure 3, with the foot engaging portion L1 formed on one end thereof and turned upwardly so that the foot ofthe operator will-not engagewith the 'fbodyvofvthe lever when it is being operated 'and the other end of the said lever has a protrudingrflat portion L2 thereon which is adapted to be Vbrought against theibottom side' ofthe ball 2'? to actuate the valve. i

The operation of my device is as'follows: The valve is mounted onthe'dashboard of the automobile as shown in Figure l, and theVY iuid lines connected which lead to-thejapplication. A 'lf-connection T is provided in the -to enter the cham'ber 30 above the piston v2l. lThe chamber being in open connection with lthe hole 15', thefluid passes out tothe applicationvof the brakes.r ',When suficient back pressure'fh'as been built; up'in the brakes and brake lines, thepiston 21 will be moved ,downwardly by such pressure and the `musasy desired. o

Y The involved'fluid pressure in the chamber `outlet into the open air.

cles of the'lleg of thev operator will give sulficiently t0 allow the -valve1l7 to close the `seat Hand no more fluid -will be allowed to enter Y the chamber 30; To release-the brakes'andthe pressure in the lines, the operatormoves his .foot up from the lever L and the force of the Huid in the'chamber 30 will force the piston 2l'downwardly sufficiently for the rod'8 to bemovedandthe valve seat `18 Vmoved away fromthe yvalve, 17, allowingV the -fluid in the chamber and lines'toV pass out through the bore- 19, the ports'20' into the chamber '31 'lbelow vthe piston 21, and the; chamber 31 Vbeir'ig finV yopenv connection with V the Lexhaust or outlet opening 4,'the fluid escapes to the The' operation maybe repeated f A open air.

30 andthe lines to the application isl'the pressure which actuatesthe muscles of the opera- 'tor vsuiiieiently to close the valve Vseat T14 and Y n the release of the lever 'L by the operator 'in y vanydc'legre'a whichihe desires regulates the. Y. i lamountq'o'fpressure allowed to pass' out of tlieexhaust or the applicatieny chamber gto Having thus describedV my invention 4Iy desire-toi secure'by Letters Patent andclaim a'tluidfcontrol valve thecombination of a Cylindrical casing; van exhaust and an application connection therewith; a portion provided in the top end'thereof forming a nvalve seat therein; an inlet connection in the space above said valve seat; a piston operable within said cylinder, having a hollow stem therein with ports inthe bottom endv of said hollow in open `connection with the chamber below said piston;'a valve seat formed on the top end of said stems; a lever to move said piston and stem; Vanda"valveadapted to seat inboth of saidvalve seats to close one or both, as necessary. y v2. In atfluidgcontrol valve the combination of a cylindrical casing having inlety applicavtionf and exhaust openings therein; a piston operablerwithin said casing, having the top end of the piston rodhollow" and in open connection withthe space above and belowl said piston; means to manuallymove said piston and rod; a valve. seat formed in the topend of'said casing between thel intake opening and -theinterior of said cylindergand a valve adapted to close both said valve seat-and the' top endofthe piston rod as'necessary to'control the flow of luidto the application and the exhaust.

3. A fluidcontrolvalve comprising-a casing; apiston slidably carried insaid casing;

vintake and exhaustvalves `controlledfby the Y movement of said plston under HuidV pressure v and opposed-to the-.direct lmuscular tension of the operaton' Y Y Y 4; A fluid control valve comprising a 'casv ingya piston slidabl-ycarried therein, having a valve seatin its center andan exhaust port therethrough;l a single intake valvey adaptable tol seat on `-exhaustand intakev ports simultaneouslygand means to automatically loperate vsaid 'valves byy the finvolved fluid pressure to direct varying pressures according-to the variable direct' muscular tensionk ofthe operator.

Inl testimony whereof I have affixed my"y signature..

i ROBERT

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