US800961A - Reducing-valve. - Google Patents

Description

PATENTED OCT. 3, 190.5.

No.800,96l.

J. B. WARING. REDUGING VALVE. PPLIGATIN :FILED MARJI, 1904.

Maw/vivai UNITED STAlIES PATENT OFFICE.

JOHN B. WARING, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO IVARING PATENTS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Speccation of Letters Patent.

REDUClNG-VALVE.

Patented Oct. 3, 1905.

To all whom, it may concern:

Be it known that I, Jol-IN B. l/VARING, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Reducing-Valves, of which the following is a specification, reference being had therein to the accompanying drawings, forming a part thereof.

My invention relates to valves adapted for the regulation or reduction of pressures and for controlling the flow of a iiuid from a higher to a lower pressure, so as to produce a uniform predetermined lower pressure; and my invention has for its objects generally simplicity and compactness of construction and uniformity and reliability of operation.

My invention includes the employment of movable valve-actuating means subjected to the pressure of the low-pressure chamber, this movable valve-actuating means including means for opposing such loW pressure and also including rotation-restraining means and of a rotatable valve member controlling the valve and having a helical engagement with the valve-actuating means, so that the motion of the valve-actuating means will be converted into rotary movement of the valve member.

My invention also includes the arrangement of the valve member and valve-actuating means so that one will telescope within the other.

My invention also includes the provision of a stationary socket for the valve member with which the valve member has a threaded engagement, so that the rotary movement of the valve member is converted into axial movement thereof, and the helix last mentioned being of considerably less pitch than that of the engagement of the valve-actuating means and rotary vvalve member, so that the axial movement of the valve member is of considerably less extent than the movement of the valve-actuating means.

My invention also includes various improvements in the construction of the parts and in combinations thereof.

I will now describe the devices illustrated in the accompanying drawings and embodying my invention and will thereafter point out my invention in claim.

Figure 1 is a vertical central section of a valve embodying my invention. Fig. 2 is a horizontal section thereof on a plane indicated by the line 2 2, Fig. 1. Fig. 3 is a hori- Zontal section thereof on the plane indicated by the line 3 3, `Fig. 1.

The valve shown in the figures is designed for the reduction of extremely high pressures, such as are encountered in the evaporation of liquefied gases.

The valve-casing comprises a rectangular casting or body a and a tubular piston-chamber b. The body c has a high-pressure duct or passageV comprising a high-pressure inlet c and a high-pressure chamber d and also has a low-pressure outlet e. A low-pressure chamberis formed by the lower portion of the piston-chamber b and is connected to the low-pressure outlet by the duct 35, and the passage of fluid from the high-pressure duct or chamber d to the low-pressure chamber f is controlled by a reciprocating needle-valve 7L, coacting with a nipple g, having a restricted orifice and screwed into a threaded boring through the upper wall of the body a. This valve-nipple has a diametric slot at its enlarged lower end to receive a screw-'driver or other implement to eii'ect its insertion and removal and is readily accessible through a threaded orifice in the bottom of the valvebody, this-orifice being closed by a removable screw-cap 5.

The valve member has a threaded part 12 above the needle-valve h, this threaded part passing through a threaded socket 7 in a bracket 6, extending up from the body a into the low-pressure chamber. Above the threaded part 12 the valve member has an enlarged cylindrical part 14, provided with helical slots 15 of large pitch, three of such helical slots 15 being shown, and these helical slots coact with a nut 22, carried by the piston 16 and convert the reciprocating movement of the piston into rotary movement of the valve member, and the rotary movement of the valve member screws the valve member up and down in the threaded socket 7 and opens and closes the valve, it being noted that the nut 22 has a guide-rod 8 secured therein and extending down into an elongated guide-boring 20, formed in the bracket 6, and down into a vertical column 32 in the body a., this guide-rod restraining rotation of the nut 22.

The piston is of double form to assure tightness and long bearing, the two parts i IOO and i being connected. by a neck y', within which and the lower piston t' is formed a hollow cylindrical recess to receive the enlarged helieally-slotted cylindrical part 14 of the valve member. Each part of the piston is provided with suitable packing-cups. The packing-cup 25 of the lower piston i is held up against this piston by a washer 27 against which the nut 22 is clamped, this nut 22 being at its upper portion screwed up over a threaded neek extending down 'from the lower piston. The packing-cup 26 of the upper piston i is held down against the upper piston by a washer 28, against which is clamped a nut 24., having a rounded or spherical uppersurliaee and screwed down over a threaded stud extending up Vfrom the upper piston fi.

The Huid-pressure within the low-pressure chambery" and exerted upward against the piston is opposed by a resisting device shown as consisting of a helical compression-spring 23, which at its lower end presses against the rounded upper surface ol" the nut 24 and at its upper end presses against a shouldered nut 31 on. the adjusting-screw 30, this adjusting-screw being soekcted with Yfreedom oi' rotation in the upper head f: of the pistonchalnber l) and having an enlarged shoulder 33 bearing against the lower tace of such head and having tlat portions at its upper projecting end for engagement with a wrench or suitable rotating means. rl`he strength of this resisting-spring may be adjusted by rotating the adjusting-screw 30, thc other parts being held from rotation by the guiderod 8 and the pressure ot the spring. The rounded upper surface ot the upper pistonnut 24 assures a centered thrust oll the spring.

The upper part of the piston-chamber l) above the piston is open to the outer or atmospheric pressure, and this atmospheric pressure exerted downward on the piston is opposed to the tluidfpressure in the low-pressure chamberj' exerted upward against the piston. The downward. thrust of the resisting device or spring 23 is so adjusted that this thrust, with the atmospheric pressure,

will close the valve 7L when the predetermined pressure is attained in the low-pressure chamber. A diminution of pressure in the low-pressure chamber will result in an opening movementot the valve, promptly followed by a closing of the valve when the predetermined pressure is attained.

It will be noted. that the piston, the nut 22, engaging the helical slots 15, the guide-rod S, and the pressure-resisting means, including the spring 23, comprise movable valve-actuating means subjected to the pressure of the low-pressure chamber f and including means Vlior opposing the pressure or the lowpressure chamber and also including rotation-restraining means.

It is obvious that various modifications may be made in the constructions shown and above particularly described within the spirit and scope of my invention.

What I claim, and desire to secure by Letters Patent, isA

A reducing-valve comprising a valve-body having a high-pressure chamber, a high-pressure inlet, a eylin d rical low-pressure chamber, an outlet 'for the low-pressure chamber, and a high-pressure duet leading to the low-pressure chamber, a valve arranged to control the duct, a valve member arranged toeontrol the valve, a hollow piston in the cylindrical chamber and secured to the valve member, the piston and cylindrical chamber having a helical engagement, a bracket eX- tending from the valve-body into the cylindrical chamber and having a bore and also a threaded socket, the valve member having a threaded portion of di'flerent pitch than said helical engaging members and engaging the socket, and a rod carried by the piston and movable in the bore in the bracket.

In testimony whereof I have al'lixed my signature in presence of two witnesses.

JOHN B. WTARING.

IVitnesses HENRY D. WILLIAMS, HERBERT H. Giens.

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