US1360504A - Fluid-pressure-reducing device - Google Patents

Description

D. CROWTHER.

FLUID PRESSURE REDUCING DEVICE.

APPLICATION HLED JULY 28, 19i9.

1 ,360,504;, Patented Nov. 30, 1920.

4. l2. IO 42 & 1 AXML/ F/c -Z INVENTOR' DAV/o CROWTHER.

A TTOHNEYS.

DAVID CROWTHER, 0F MINNEAPOLIS, MINNESOTA.

I FLUIDLVPRESSURE-REDUCING DEVICE.

Specification of Letters Patent.

Patented Nov. 30, 1920.

Application filed July 28, 1919. Serial No. 313,778.

To (6Z6 7.0/1012L it may concern g p e it known that 1, DAVID Cnow'rHnR, a citizen oi the United States, residing at 'i mneapohs, in the county of Hennepin and Qt t f 1 m l in. 7 t ,1 -t u a e 0 imucsota, .iaic mven er tel am new and useful Improvements in Fluid- Pressurellcducing Devices, of which the following is a specification.

lily invention relates to fluid pressure re ducing devices and an object is to provide a device of this character by means of which a gas under pressure in a container may be delivered with its pressure reduced oany desired extent regardlessoi the degree of pressure in the container. Although not confined to such use my device is, however, designed primarily for use in connection with blow pipes for delivering oxygen which is under pressure in a container so that the pressure of the gas will be reduced to nearly that of the atmosphere at the point of delivery to the blow pipe.

The full objects and advantages of my invention will appear inv connection with the detailed description thereof and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings, which illustrate the application of my invention in one "f0rm, V

Figure 1 is a view in elevation. Fi 2'is a view in section on the line 22 of Fg. '1,

and showing the device secured to a bottle or container. Fig. 3 isa'section on the line of Fi 2. Fig. 4 is a section on the line 4-4 of Fig. 2.

Referring to the particular construction shown in the crawings, the device comprises a clamping member 10 provided at on'e end with a screw-threaded member 12 which at its outer end is bent to form a handle 14. The clamping member at its opposite end is provided with a pressure-reducing head comprising an inner tube 16,.a'n outer tube 18 and a screw-threaded cap 20. As shown, the tube 18 is integral with the clamp 10 and the tube 16 has its opposite ends fitting snugly within the tube 18. The inner end oi"? the tube 16 projects beyond. the tube 18 so as to extend within the adjacent end portion of the clamp, and the outer end of the tube 16 projects beyond the corresponding end of the tube 18 The bore 22 of the tube 16 is reduced where it extends through the v outer endoi the tube so as to form a small nassa 'ewa 24 and the end of the tube at l b .7

this place is beveled. The exterior surface otthe tube 16 is cut away intermediate its ends so that in conjunction with the tube 18 a longitudinal groove or an annular chamber 26 is formed. The outer end of the tube 16 at the bottom of the beveled portion is provided with a plurality of small passageways 28. As shown, these passageways are three in number. The inner end of the an nular chamber 26 connects with a passage way or duct 30 formed in a neck member 32 integral with the tube ls, this neck member serving for attachment of a flexible tube 34 for conducting the gas to the desired point. The tube 18 is exteriorly threaded to receive the interiorly screw-threaded up 20. Within this cap is a disk 36 preferably of yielding material such as fiber or soft metal' lic alloy for cooperating with the beveled end of the tube 16. The disk 36 is yieldingly backed by one or more springs. Two springs 38 and 40 may be employed as shown,the utenspring 40 being stiffer and shorter thanthe spring 38 for a purpose which will presently appear. I

The operation and advantages of my invention will be readily understood fromthe foregoing description. The device is intended for use particularly with a wellknown form of bottle or gas container 42 having a neck with a passageway 44 and a lateral'opening 46. A screw-threaded stem having a beveled end 48- serves to close and open communication between the passage sageway 24 into the chamber within the cap Q0, from which it passes through the passageways 28 into the annular chamber 26 and through theneck member 32 and the tubing 34 to the desired place. It is evident that the pressure of the gas will be reduced in proportion to the force with which the disk 38 is held uponthe beveled end of the tube 16, and that the gas can be delivered at '90 way 44 and the opening 46. Inusmg my inc any desired pressure through the tube 34 regardless of the degree of pressure in the container 42. If the pressure in this container is very high the cap 20 will be turned down so that both springs 38 and 40 act to hold the disk 36 upon the end of the tube 16, and, on the contrary, it the pressure in the container is low the position of the cap is adjusted so that the spring 38 only acts to hold down the disk 36. The pressure at which the gas is delivered thus be regulated with very great nicety regardless of the degree of pressure in the container. On account of the beveled end of the tube 16 extending beyond the entrance to the passageways 28 the gas in the cap will readily enter these passageways regardless of the force with which the disk is held down. On account of the reaction of the spring on the cap the threads of the latter will be held in close engagement with the threads oi the tube 18 and thus prevent leakage.

I claim 1. A fluid pressure reducing device comprising a reducing head, an outwardly leading passageway in said head, a return passageway leading in the opposite direction from said first mentioned passageway and spaced therefrom, a duct leading from said return passageway, and a closure resiliently engaging the delivery end of said first mentioned passageway.

2. A fluid pressure reducing device comprising a reducing head, a tube in said head, a disk, means for resiliently holding said disk in engagement with the delivery end of said tube, a return passageway extending outside oi said tube, and a duct leading ironi said passageway.

3. A fluid pressure reducing device comprising a reducing head, an inner tube in said head having a projecting delivery end, an outer tube surrounding said inner tube, a return passageway between said inner and outer tubes, a duct leadin from said passage way, a screw cap having screw threaded engagement with said head, a disk in said cap, and a spring in said cap for resilientlyholding said disk in engagement with the delivery end of said inner tube.

4-. A fluid pressure reducing device comprising a reducing head, an inner tube in said head having a beveled surface at its delivery end, an outer tube surrounding said inner tube, intermediate portions of said tubes being spaced from each other to -form an annular chamber, passages adjacent said beveled surface leading into said annular chamber, a passageway leading from said annular chamber, a screw cap having screw-threaded engagement with said head, a disk in said cap, and a spring in said cap for resiliently holding said disk in engagement with said beveled delivery end of the inner tube.

5. A fluid pressure reducing device comprising a reducing head, an inner tube in said head havinga beveled surface at its deliver; end, an outertube surrounding said inner tube, the intermediate portion of said inner tube being reduced to form an annular chamher in connection with said outer tube, passages adjacent said beveled surface leading into said annular chamber, a passageway leading from said annular chamber, a screw cap having screwthreaded engagement with said head, a disk in said cap, and two springs in said cap for resiliently holding said disk in engagement with said beveled delivery end of the inner tube, one of said springs being shorter and stiffer than the other spring.

6. A fluid pressure reducing device comprising a clamp adapted to be attached to a gas container, a pressure reducing head secured to said clamp, an inner tube in said head, the receiving end of said tube being adapted. to be placed in communication with said container when said. head is clamped thereto, an outer tube surrounding said inner tube, the intermediate portions of said tubes being spaced from each other to term an annular chamber, passages adjacent said beveled surface leading into said annular chamber, a passageway leading from said annular chamber, a screw cap having scrcwthreaded engagement with said. head, a disk in said cap, and a spring in said cap for resiliently holding said disk in engagement with the delivery end of the inner tube.

In testimony whereof I hereunto atllx my signature.

DAVID GROWTH ER.

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