Abstract of
GB556857
556,857. Pipe joints. NASH, A. G. FRAZER-. Oct. 23, 1939, No. 28483. [Class 99 (i)] In a hinged joint comprising a flexible tube 2 connecting the pipe ends 1 and,rigid connecting means permitting relative angular movement of the pipe axes, the flexible tube has one or more floating rings 5 encircling it closely to prevent kinking. Collars 4 on the pipe ends have arms 7 hinged at 8. The ends of the flexible tube are secured by ferrules 3 screwed into the collars. In a modification a two-part spherical sleeve engages spherical surfaces on the collars, relative rotation of the pipes being prevented by pins and recesses in sleeve and collars.
Applicant: NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
EC:F16L27/111
IPC: F16L27/111;F16L27/00
Publication info: US3219365 - 1965-11-23
3
Limited movement hinge connection
Inventor: PARR EDWARD L; VECHTEN JAMES M VAN
Applicant: FAIRCHILD CAMERA INSTR CO
EC:F02K9/84; F16L27/08C3
IPC: F02K9/84; F16L27/08;F02K9/00(+1)
Publication info: US3179447 - 1965-04-20
Description
PATENT SPECIFICATION
Application Date: Oct 23, 1939:No 28483/39 556,857 Complete Specification Left: June 10, 1940.
Complete Specification Accepted: Oct 26, 1943.
PROVISIONAL SPECIFICATION
Improvements in and relating to Pipe Joints 1, Ait CIBALD GOOD 3 LUN 4 RAZB R-i NASII, a British subject, of the Works of Nash & Thompson Limited, Oakcroft Road, Kingston By-Pass, Tolworth, in the County of Middlesex, do hereby declare the nature of this invention to be as follows:This invention relates to piibe joints of the kind including members adapted rigidly to engage the adjacent ends of two lengths of pipe, a flexible tube extending between such members, and an inextensible coupling member adapted to engage said members and permit relative displacelnent of the axes of the lengths of pipe secured together by the coupling member.
In pipe joints of this kind there are provided between adjacent lengths of pipe a eonnection which will take up tensile and compression stresses and permit the axes of the lengths of pipe to be displaced relatively to one another and a flexible connection for ensuring a fluid-tight joint between such lengths of pipe.
The inextensible coupling member may l)e such as to permnit relative displacement of the axes of the length of pipe secured together by it in one plane only or in any plane, and in the latter ease the coupling member will constitute a muniversal joint or Hookes joint.
It has been found that the flexible tube or coeinection in such devices, when the joint is bent and a high pressure obtainswithin the pipe line of which the fliexi:ble tube forms part, tends to blow out on its (olvex side, and the object of the invention i to overcome this tendency.
According to the invention, guide memheers which may take, the form of a collar or collars, floating laterally, are associated with the members adapted rigidly to engage the adjacent length of pipe or with il coupling member, in such manner that lev cannot be pushed l aterally out of T)osition by more than a predetermined iermissible amount.
The flexible tube, which mayr be formed of metal or a moulded composition, is preferably deeply corrugated eirecumferentially in order to give it freedom to bend without permanent distortion.
The connection between the flexible tube and the members adapted rigidly to 55 engage the adjacent ends of lengths of pipe may be secured by the provision in such members of externally screw-tihreaded nut elements adapted to engage corr espondingly internally screw-threaded portions 60 of the members and the connection between such members and the lenlgth of pipe may be effected by providing members with screw-threaded portions adapted to engage correspondingly screw fi 5 threaded portions of the pipe.
The members adapted rigidly to engage the adjacent ends of two lengths of pipe may be provided with spherical surfaces adapted to co-operate with correspond 70 ingly formed spherical surfaces formed within the coupling member' Where the inextensible coupling meumbear is designed to pexrmit displacement between the axes of the lengths of pipe in 75 one plane only, the inextensible coupling member may comprise or consist of a pin engaging in and providing pivotal connection between the members.
This pin connection will function to 80 prevent relative rotation of the lengths of ripe about their axes, and where the joint is made up in a form adapted to, be screwed by pipe unions to the two pipes or comTponents it is designed to connect, the 85 flexible tube will be protected from txwisting stresses in tightening up such unions.
Where the coupling member provides in effect a universal joint, means for preventing such relative rotation is preferably 90 provided, and this may be effected by the provision of pins or projections on one of the' spherical surfaces and, for instanee, the spherical surfaces ftormed on the members adapted rigidly to engage the 95 adjacent ends of two lengths of pipe and co-operating with depressions or recesses provided on the internal spherical surf:aee of thee coupling member.
Dated this 23rd day of October, 1939.
MARKS & CLERK, l 5.56,857 COMIPLETE SPECIFICATION
Improvements in and relating to Pipe Joints I, ARCHIBALD GOODMAN FRAZE It-N As H, a British subject, of the Works of Nash & Thompson, Ltd, Oakcroft Road, Kingston By-Pass, Tolwo Tth, in the County of Surrey, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:-
This invention relates to pipe joints of the kind including members adapted rigidly to engage the adjacent ends of two lengths of pipe, a flexible tube extending between such memrbers, and inextensible counpling means adapted to engage said members and permit relative displacement of the axes of the lengths of pipe secured together by the coupling means.
In pipe joints of this kind there are provided between adjacent lengths of pipe a (connection which will take up tensile and compression stresses and permit the axes of the lengths of pipe to be displaced relatively to one anoth er and a flexible connection for ensuring a fluid-tight joint between such lengths of pipe.
The inextensible coupling means may be such as to permit relative displacement of the axes of the length of pipe secured together by it in one plane only or in any plane, and in the latter case the coupling niember will constitute a universal joint or oo Gkes joint.
It has been found that the flexible tube or econnection in such devices, when the joint is bent and a high pressure obtains within the pipe line of which the, flexible tube forms part, tends to blow out on its convex side, its cross section being thus distorted, and the object of the invention is to overcome this tendency.
According to the invention within the inextensible coupling means there are provided one or more' floating rings which t 5 encircle the flexible tube or connection andi prevent the excessive distortion of its normal cross section.
The flexible tube, which may be f(tc-iled of metal or a moulded composition is pieferably deeply corrugated eireumferentially in order to give it freedom to bend without permanent distortion.
The eonnection bet Ween the flexible tube and the members adapted rigidly to engage the adjacent ends of lengths of pipe may be secured by the provision in, such moenbeyrs of externally screw-threaded nut elements adapted to engage correspondingly internally screw-threaded portions CO of the miembers and the connection between such members and the length of pipe may he effected by providing menmbers with screw-threaded portions adapted to engage correspondingly screw-threaded portions of the pipe a 6 The members adapted rigidly to ergage the adjacent ends of two lengths of pipe may be provided with spherical surfaces adapted to co-operate with correspondingly formed spherical surfaces formed 70 within the coupling means.
Where the inextensible coupling member is designed to permit displacement between the axes of the lengths of pipe in one plane only the inextensible coupling 75 means may comprise or consist of pins engaging in and providing pivotal connection between the members.
This pin connection will function to prevent relative rotation of the lenog'-hs of 80 pipe about their axes, and where the joint is made up in a form adapted to be screwed by pipe unions to the two pipes or components it is designed to connect, the flexible tube will be protected from twi Qt 85 ing stresses in tightening up such unions.
Wthere the coupling member provides in effect a universal joint, means for preventing such relative rotation is prefe Trably provided and this ma Oy be effected 90 by the provision of pins or projections on one of the spherical surfaces, for instance, the spherical surfaces formed on the members adapted rigidly to engage the adjacent ends of two lengtbhs of pipe and co-operat 95 ing with depressions or recesses provided on the internal spherical surface of the coupling member.
Certain constructions in accordance with the invention will be destrib)ed 100 further in detail and by way of example with reference to the accompanying' drawinl,'s, in which:Figures 1 and 2 are respectixvely a view in sectional elevation and a view in plan 105 of one construction; Figures 3 and 4 being corresljoiding views of a second construction, and, Figures 5 and f; Imil: r viewxi o: a f il'd construction 110 In all of the Figures, I indicates the walls of lenoths of pipe and 2 the wall of a flexible tube of corruoated form the extremities of which are engaged between ringls 3 in screw-threaded connection with 115 collars 4 which are in turn in screwthreaded connection with the tube wall 1.
About the length of flexible tube there is located in the eonstructionms illlustratedl in Figures 1 a nd 2 and 5 and 6, a single 120 556,857 ' floating ring 5 so dimensioned as relatively closely to engage about the tube and thus maintain its circular cross section.
In the case of the construction shown in Figures 3 and 4 a plurality of floating rings 6 are provided for the like purpose.
In the case of the construction illustrated in Figures 1 and 2, the collars 4 are each provided with lugs or arms 7 connested together by pins S These constructions enable relative movement between the lengths of pipe connected by the coupling member about one, axis only, that is to say, an axis corresponding with the axis of the pins 8.
In the case of the construction shown in Figures 5 and 6 the collars 4 are provided with generally spherical surfaces cooperating with correspondingly formed spherical surfaces within the coupling member 9 which as will be seen is formned of two half-sections in screwed connection one with the other.
W 5 ith such a construction relative movement of the two lengths of pipe connected by the coupling may take place a,bout more than one axis, the connection in effect )being generally in the nature of a universal joint To prevent excessive twisting stresses being applied to the flexible tube, pins or like projections may be provided on the, spherical surfaces of the collars so that they co-operate with gg Tooves provided in the internally spherical surface of the coupling member.
In all of the constructions desc Tibed, the rings are arranged so that they closely encircle the tube They atre, however, shown in the drawings sonmewhlat widely spaced apart fromn the walls of the tube for clearness of illustration.
Having now particularly described and ascertained the natue of my said invention and in what mamnner the same is to be performed, I declare that what I clain is:1 A pipe joint of the kind including members adapted rigidly to engage the odjacent ends of two lengths of pipe, a flexible tube extending between such menbers, and inextensible coupling means adapted to engage said memibers and permit relative displacement of the axes of the lengths of pipe secured together by the coupling means, characterised in this 55 that within the inextensible coupling means there are provided one or more fi:oating rings which encircle the flexible lube or connection and prevent the excessive distortion of its normal cross 60 section.
2 A pipe joint as claimed in claim 1 in which the connection betveen the flexible tube and the members adapted rigidly to engage the adjacent ends of 65 l'engfths of pipe is secured by the, provision min such members of externally screwthreaded nut elements adapted to engage correspondingly internally screw-threaded portions of the members 70 3 A pipe joint as claimed in claim 2, in which the members adapted rigidly to engage the adjacent ends of two lengths of pipe are provided with spherical surfaces adapted to co-operate with corre 75, spondingly formed spherical smurfaces forinemd within the coupling means.
4 A pipe joint as claimed in claim 2, in which the inextensible coupliang means is designed to permit displacement 80 between the axes of the lengths of pipe in one planfe only, and comprlises pins engaging in and providing pivotal connection between the nimeanbes.
3 A pipe joint as claimed in claim, 8,b in which for preventing relative rotation of the eouplinfg members pins or projections are provided on the spherical surfaces forrmied on the memnbers, adapted rigidly to engage the adjacent ends of two 90 lengths of pipe and depiessions or recesses axre provided on the internal spherical surface of the coupling memibe witlh which such pins or projections co-operlate.
6 The improved pipe joints of the kind 95 including members adapted rigidly to engage the adjacent ends of two lengths of pipe, a flexible tube extendinig:bietween such members, and an inextensible coupling means adapted to engage said 100 members and permit relative displacement of the, axes of the lengths of pipe secured together by the coupling means, substantially as hereinbefore described and as illustrated in and by the accompanying 105 drawings.
Dated this 10th day of June, 1940.
MARKS & CLERK.
Leamington Spa: Printed for His Majesty's Stationery Office, by the Courier Press -1943.
