US749975A - Fluid-pressure-regulating device - Google Patents

Description

P. 'SYNNESTVEUL FLUID PRESSURE RE-GULATING DEVICE.

PrLIouIoN FILED 1120.21. 1900. l

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l l l l llllllll x j l lllllllllll lllll UNITED STATES Patented January 19, 1904.

PATENT OFFICE.

PAUL SYNNESTVEDT, OF GLENVIEW, ILLINOIS, ASSIGNOR TO WESTING- HOUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, A CORPORATION` OF PENNSYLVANIA.

FLUIDfPRESSURE-REGULATING DEVICE.

SPECIFICATION forming 'part o f Lettersratent No. 749,975, dated January 19, 1904.

i Application filed December Z1, 1900. Serial No. 40,706. (No model.)

To all whom it may concer-71,:

Be it known that I, PAUL SYNNEsTvEDT, a citizen of the United States, residing at Glenview, Cook county, Illinois, have invented certain new and useful Improvements in Fluid- Pressure-Regulating Devices, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to Huid pressure regulating valves such as in use especially in air brake apparatus and the like, and particularly to the means for moving and seating an inlet valve automatically by means of the pressure on the low pressure side. rIhe objects of the invention are, to provide a valve with positive, direct and powerful seating means operated by the outlet pressure; to provide a superior valve seat designed to avoid the accumulation of dirt and leakage of the fluid therethrough; to provide a valve to operate as a check valve against back pressure, and means for seating it directly and positively from anY abutment on the outlet side, but allowing movement of the abutment Without openingthe valve; to provide a superior form of mechanism for the purposes designed to attain great promptness and nicety in the movements. These objects, and other, advantages which will hereinafter appear, I attain by means of the construction illustrated in preferred form in the accompanying drawings, wherein- Figure 1 is a vertical central section of the Whole device; Figure 2 is a horizontal section along the line of the inlet and outlet ports at the upper end of the casing;

Figure 3 is a partial centralsection taken' vertically along a different plane from that of Figure l; l

Figure 4 is a side elevation of the improved yoke for operating the valve from the movable abutment, Figure 5 is a section of the same, and Figure 6 is a plan of the top ring of the yoke as partly cut out to allow of inserting it in its place.

The casing 7 is provided with an inlet 8 and an outlet 9 and with connecting passages including the valve opening and the chamber 10. A projection 14 extends laterally into the chamber 10 and contains a bushing provided with a valve seat. Below and in line with the valve seat, in an enlargement of the chamber 10 is a movable abutment 11 provided with a stem 17 and normally held upward by the spring 12, which rests upon the adjusting nut 13 in the lower end of the casing. Attached to thelupper side of the stem 17, to move integrally with the abutment 11, is a yoke 18 comprising preferably three legs 20 extending upward and carrying a ring 21 within which is screwed a cap 19, designed to push the valve 16 upon its seat. The yoke 18 including the ring 21 is preferably cast integral, and after the threads 22 are cut therein it may be sawed open as at 23 in order to clear the neck of the projection 14 in putting it in place, after which the cap 19 is screwed into the ring 21.

The movable abutment 11 is designed to be put in place from below before the parts of the casing are put together, and the valve 16, the valve seat and the cap 19 may be put in vfrom above, when the upper end of the chamber 10 is closed by the screw cap.24. I prefer to use the form of puppet valve 16 which seats upon a narrow conical face and is guided within the valve casing by means of the guide wings las shown.

The spring 12, it will be understood, is adjusted by means of the nutf13 so that the normal position of the yoke 2O allowsof the valve 16 opening by the pressure on the inlet side. The uid then iiows through the valve port, chamber 10 and the-outlet port 9 until it has accumulated and exerts a pressure upon abutment 11 sufficient to move the same downward and thrust the valve 16 ontoits seat. If any leakage takes placethrough the valve,

yit increases the pressure on abutment 11v and thus increases the force on the cap 19 holding the valve shut. The freedom. of motion of the valve when the yoke is up, allows it to act as a back check in case pressure is reduced on the inlet side, and variations of the abutment will not disturb the valve. It will -be observed, al'so, that the downward thrust on the cap 19 is direct and unyielding, and consequently the valve is closed quickly and positively upon rise of pressure on the outlet side; while at the same time the valve is perfectly Jfree to open by merely raising its own weight when the yoke 2O is lifted by reduction oi` pressure. The valve can be opened or closed very gradually and delicately by means of combination of features described.

Having thus described my invention and illustrated its use,what I claim as new, and desire to secure by Letters Patent, is the following:

l. In a pressure regulating` device the combination with a casing having a main chamber and an inlet and an outlet port, of a boss eX- tending into said chamber carrying a conical valve seat and loose puppet valve seated therein, a movable abutment in said mainlchamber subject to pressure on the outlet side of the valve and guided to move in vertical guides, and a yoke surrounding said boss, connected directly to the movable abutment and adapted to positively close the Valve on its seat, substantially as described.

2. In a pressure regulating valve device, the 2 5 combination with a valve casing havinga main chamber, of a valve and a seat therefor, and means to close said valve on the seat comprising a pressure operated abutment in the cham ber, and a yoke attached to said abutment, and provided with legs extending around the valve seat and a screw threaded cap borne on said legs, unconnected to the valve but directly and rigidly engaging the same to push it on the seat when' the abutment is moved downward by the fluid pressure on the outlet side of the valve.

PAUL SYNNESIVED'I. Witnesses:

PAUL CARPENTER, FRANK GREEN.

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