USRE10674E - Pipe-coupling - Google Patents

Description

-J. A. MQGORMIGK.

PIPE OOUPLING- I No. 10,674. Reissued Dec. 15, 1885.

a... 'Fhiiiiiif-U 000-0000 l lit the pipe.

invention, reference being had to the accom- Kpanying drawings, which form a part of this UNITED [STATES PATENT OFFICE.

JUNIUS A. hIoOORMICK, or PITTSBURG,PENNSYLVANIA.

PIPE-COUPLING.

SPECIFICATION forming part of Reiasued Letters Patent No. 10,674, dated December 15, 1885.

Original N0. 318,009I dated May 19, 1885. A plication for reissue filed October 2-2, 1885. Serial No. 180,672.

To all whom it, may concs'r'nr Be it known that I, JUNIUs A. MoCo'a MICK, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Pipe-Couplings; and I do hereby declare the following to be a full, clear, and exact description of the specification.

This invention has for its object a form of coupling for pipes used for the conveyance of aeriform fluids under pressure-such as gas, steam, or natural gas, the last especially, as it has been found difiicult to restrain the pressure to such an extent as to preclude leakage at the pipe-joint.

So far as I am aware, all joints heretofore specially proposed have been based on some one of the principles of mechanical compression or friction by means of compress-rings, flanges, or sleeves mechanically acting upon some form of packing or gasket. .Iy inven-. tion differs radically from any such principle, and is based upon the result of the fluidpressure in the pipe itself acting upon a suitable packing material.

It consists in subjecting suitable packing material in a properly-designed chamber to the direct pressure of the fluid in the pipe in such a manner as to cause the said pressure to exert a compressing tendency upon the packing material, and thus seal the joint between the pipe aud the coupling-sleeve.

The invention further comprises a pipecoupling wherein the adjacent pipe ends are separated within a sleeve chambered to receive and retain a packing material having a surface so exposed to the pressure of the fluid in the pipe that the pressure of said fluid is exerted to hold the packing tightly arc 11nd The invention still further comprises a pipe-' coupling whereinthe packing is a fluid'of a liquid, semi-liquid, or viscous character, adapted to be held in position by the pressure of the fluid passing through the pipe, and, finally, in the construction and arrangement of parts, substantially as hereinafter fully described and claimed. t

In the drawings, Figure l is a longitudinal section of one form of my invention. Fig. 2 is a similar view of a modification, and Fig. 3 is a view showing the arrangement for replenishing the packing from time to time, if necessary.

lhe preferred form is shown in Fig. 1.

A A are the adjacent sectionsof pipe, which in this case are mooth and unthreaded externally, as this .oupling is designed to permit free expansion and contraction of the pipe-line. I insert these into the respective ends of the sleeve B, which comprises the neck 0 (which merely sufl'cr the pipes A to be inserted) and the enlargement at, having the central annular chamber, e, and the similar annular chambers f, with the interposed walls 9, whose inner periphery also closely fits the pipe A. Ports h open from thechamber e into chambersf at thetop of the latter. In the wall of the sleeve B, I make the openings 'i, -which I fit with screw-plugs k, as H shown. p,

In placing the sleeve B in position the sea son or temperature will determine the amount of separation to be allowed between the adjacent ends of pipes A A. They are placed close together in summer or. hot weather, while they will be set some distance apart if laid during cold weather. After the setting of sleeve B, I remove plugs k, and pour into the chambers f tar, oil, paraffine, or other suitable material, until the same almost fills the said chambers, but not entirely. I then screw down the plugs k and the coupling is complete.

Thefluid-pressure in the pipes A has direct access to the chamber a, and from it, through ports h, to the upper surface of the packing material which surrounds the pipe A in chambers'f; hence the-very pressure of the fluid in' the pipe A itself acts to pack the joint to the full; xtent of its own pressure, because it exerts ifimressure directlypn top of the packing in chamber f, and forces it tightly against the pipe A and effectually scalsethe whole joint. At the same time the pipes A can expand and contract freely.

One of the pipes A may, if desired, be anch= ored, or the sleeve B may be threaded at one end, and one of the pi pes A likewise, so

that the sleeve screwed on permanently.

cut ofl, because there is no threading to-be done after cutting ofi the required length.

As an additional precaution,lea ther or other gaskets m ma be applied inanyv of the usual 10 forms adapted to the purpose to theineck', and

also to the partitions g, asshown. 1

To provide for possibleevaporation or leakage of the packing material, it may bedesirable to replenish it from time to'time. For I 5 this purpose the plugs k may be replaoedby pipes n, risingto a man-hole in the street, for convenient access at any time,.as indicated by. Fig. 3. Pi pesn should be provided with stopvalves, or withplugs or other means of'clos- :0 ing the same, so as to prevent'the liquid substance in the chamber from escaping when subjected tothe pressure of the gas.

I will call particular attention to the'faot that whether the pipes 01 be employed or the openings 6 be closed directly b the plugs k,

the liquid substance is contains in a chamber which is tightly closed after the introduction of such liquid. This point is of great importance, as the gas would otherwise forceits way out of the chamber through or over-the liquid,and the device he thereby rendered'inoperative.

Where the pipes A are used for steam the latter,having always direct access to the pack- .ingchambers, would condense enough'water to alwayshave them full to theports' A and a in all cases the ports h wouldform over owe,

sothat the excess of materialwouldpaee into .the-chambere. I a I a 4 Kevin described my invention, I claim-- 1. A. p peieoapling comprising a sleeve to "fit the pipe ends an annu c '5. In a pipe-coupling,the combination with adjacent sections of a pipe, ot a. liquid seal peaends, a pressurechambercommunicating with the interiorof the pipe, and one or more annular packing-chambers in-eommunioation at their top with said pressure-chamber,;an.d adapted to reeeivea suitable packing material, substantially as described.

.2. A pipe-coupling composed of a sleeve to ar pressure-chamber communicating with the interior. of the pipe, and one ormore annular packing'ehambers cominunicatingwith said pressure-chamber at their upper part only, and provided with means for filling with suitable packing material after the insertion of the pipes to be coupled, substantially as described.

3. In a pi pe-coupling,the combination,with the pipes A A, of the sleeve B, having necks 0, one or more annular sealing-chambers, f and apressure-chamber, e, both of said chem ers having a communicatin port, It, at their upper portion, substantial y as described.

4. In a pipecouplingmhe combination,with

I the pipe ends, of the sleev'e B, having neck 0,

5 the interior of the pipes, and onegor moreaua pressure-chamber, e, communicating with nnlar sealing-chambers, flhaving port It, and substantially filled with a liquid or semiliquid material, substantially as described.

surrounding one or both the said pipes near the end, the said liquid being contained in an annular chamber having an opening for the introduction of the same, which opeuin is tightly closed aiter therli'quid has been in reduced, substantially asdescribed.

In testimony that I claim the foregoing as my own I have hereunto set my hand this 17th day oi October, A. 13.1885.

JUN IUS A." MQOOBMIQK.

3210.3. Aroneson, A. a. Moons. a

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