USRE23298E - Swing joint - Google Patents

Description

Nov. 28, 1950 R. o. MONROE 23,298

' SWING JOINT Original Filed April 50, 194'! FIE]; I-

HULLU ElVIUNR'UE Reissued Nov. 2%, 1950 SWING JOINT EolloO. Monroe, Three Rivers, lWiclL, assignor to The Johnson Corporation, Three Rivers, Mich, a corporation of Michigan Original No. 2,497,183, dated February 14, 1950,

Serial No. 744,855, April 30, 1947.

Application for reissue May 19, 1950, Serial No. 163,281

3 Claims.

Matter enclosed in heavy brackets [.1 appears in the original patent but forms no part of this reissue specification; matter printed in italics indicates The present invention relates to'irnprovements in swing joints required to introduce steam and water into platen presses and the like.

Because of operational strain, weight of piping, and other conditions peculiar to the connection of a plurality of joints to the movable and stationary sections of platen presses and similar structures, rotary joints of the type disclosed in my Patent 2,385,421 cannot be used, as there is no adequate support for the joint.

Then it becomes an object of the present in-,

vention to provide an improved joint for both rotary and swing service which is self-supporting.

Another object is to provide a joint of the type described in which the component parts of the joint are self-supporting, and in which a seal is provided with sufiicient float to compensate itself to commercial manufacturing tolerances, irregular wear of the sealing parts, and any minor tendency toward oscillation of the component parts of the joints in service.

Another object is to provide a fluid joint of a self-supporting character in which a conduit or pipe section is supported for oscillating or rotary movement around its longitudinal axis in a guide supported in a fixed part of the joint, the guide being located to one side of a ball and socket type of sea1 embracing the pipe section with one element of the seal floated between the pipe section and the fixed part of the joint.

A further object is to provide a fluid joint as defined in the preceding paragraphs in which the guide and floated part of the seal are of carbon graphite construction. I

These and other objects and advantages inherent in the combination and construction of the parts of this invention will be apparent from a consideration of the specification with the appended claims and accompanying drawings, in which,

Fig. I is a View in section of a self-supporting fluid joint embodying the present invention, and

Fig. II is a view in section showing a modification of the structure which supports the pipe section during its relative movement.

In Fig. I the joint In is shown as comprising a cup-shaped body portion l2 defining an axially positioned aperture l4, and enclosing a cylindrical chamber i6 within which the various parts are positioned. The body portion I2 is formed with an attachment flange i8 which mates with the attachment flange 20 of the fitting Or connecting portion 22, the attachment flanges i8 and 20 being held together by attachment screws the additions made by reissue 24. The fitting 22 encloses a fluid conduit 24 and presents a suitably threaded portion 25 for attachment to a source of fluid, not shown, and presents to the chamber l'i a relatively flat circular surface 28, the function of which will appear later, and the annular shou der 30 which fits snugly against the inner wall 32 of the body portion 12 when the parts thus far described are assembled, to aid in the positioning and sealing action of gasket 34.

The pipe 36 has a threaded end 38, and a plain end 4 3 to define the fluid conduit 42, which is normally positioned concentric to the end M of the fluid conduit 24. The pipe 36 projects through the aperture I4 into the chamber i6, wherein it supports the sealing portion At, which is fixed and sealed to the pipe 36 for movement therewith. The sealing portion 46 is preferably a spherical segment, radially bored to receive the pipe 36, and presenting a convex spherical surface 48 for engagement with the concave spherical surface 50 of the annular sealing and thrust ring 52. The sealing ring 52 bears against the flat inner surface 54 of body portion I2, and I prefer to have it of a smaller diameter than the inside diameter of the body portion l2, so that the sealing ring 52 does not react to perform part of the stabilizing action, and no interference is set up to its slight floating action. The sealing ring 52 may be of carbon graphite and the sealing bearing in of some such material as bronze, to provide members with differing wearing characteristics under friction.

To stabilize the pipe 35 and to maintain it in axial alignment with the body portion I2, I provide an annular guide 55 with its outer peripheries 58 in bearing engagement with the inner surface 32 of the body portion i2, and with its inner periphery 5B in bearing engagement with the pipe 35. The pipe 3!. is free to rotate Within the guide 55, and the peripheries 58 of the guide 56 maintain the pipe 35 concentric to the axis of the body portion H2. The spring 52, which is seated on the surface 28, is also seated on portion 64 of the guide 55, and tends to urge the guide 56 against the thrust ring ii-zi, which urges the sealing bearing as against the sealing ring 52. The thrust ring 65 is preferably of carbon graphite and the guide portion 56 of some material such as bronze.

In the modification shown in Fig. II, I have substituted a combination guide and thrust ring 10, preferably made from some such material as carbon graphite, for the guide 5 5 and the thrust ring 66. The outer surface 12 of guide it! is in ativto thebo'dy IZ and-12', 1 V f a'nd socket s'eal'ingaction of 'thefparts ifi, 46 and 52:52 this-oscillation will cause leakage.

bearing relationship with the inner surface 32' of the body%-portion'l-2"and the inner surface is in bearing relationship with thepipe 36. The spring 62 urges the combination guide and thrust bearing 10 against the sealing portion 46 which is in turn urged against the annular seal ring 52. It has been found through experiment that the carbon graphite guide 'HFhas Wear ehairacteristics superior to those-'-obtained*wlin'the metal guide 56 is used, while the joint retains its self-supporting and sealing features.

In the manufacture of thestructure disclosed, the initial clearance between the oiits'ide diameter of the guides 56 and 10 and the inside of the fixed 7, body I2 and I2 is in the order of .005". As there =is-=' no relative movementbetween these parts; the wear in servide-iS-hil. 1 Between theoutside'diameter of the ends 40 and 40' of the pipe and the inside diameter of-the guides 55 and it, the initial running clearanceis in the order of 1003'. l Du'i'ing anact-ual test of the joint disclosed in 'FigwII, "continuous operation atI'YSO RSPIMrWith water pressure between fortyend fifty' pounds per square inch'over a'long period of time only increa'sed the interior running clearance of .063" in= theorder' of 10015 to .002. Any'slight' tilting f thepipes 35' and 36' due to "the initialclear- 'ance or increase in" 'clearance due to wear I may wall of said body portion, a fixed pipe fitting attached" to said -bodyaportionfa rotatable connecting *pl-pe proj ecting through" said aperture with an all round clearance, a convex-raced sealing ring axially received over said pipe and conerected thereto for movement therewith, a concave-faced sealing ring floatingly positioned bering and said body portion and h aid first ring to provide a seal *betiveemsaid pipe and body, said concave faced seali-ng ring having-clearance with the said pipe and" With-=the=-body portion, whereby to permit the'=rin'g-toa-partake of a slight floating movement in a direction perpendicular to the longitudinal axis of the pipe to accommodate slight tilting movements of --the pipe a guidedelescopically received over-s'a-id: pipe andwithirf -said bodywortion and maintaining said pipe in axial alignment with said body portion, and spring means res-iliently-urgin'g said-guide toward said rings.

- -3. A rotary: ffl'uid joint comprising d rotary member having acsph'eri'cal segm'ental sealing portion; 5a fixed "member, a cylindrical-= carbon "graphite sleeve positioned between said members and-concentric therewith to'pro'bide =abearing J01" saz'drotary memberwith" respect to said -fia'ed member, a carbongraphitesealing ring h'avingn I spherical segmental sealing portion' complemenresult in oscillation thereof upon 'rnovement 'rel- Except for theball tary to said first "sealing." poi'tion,""and' "engaging therewith -to forma seal, said ring being so J dimensioned with "respect to' suid members as to i pmoide clearance therewith to enable limited Having described my invention, what I claim 7 anddesire toprotect by Letters Patent is:

' 1. A finidjcintcomprising a 'cup sha'ped body portiongan attachment flange on said body' portion; a fitting adapted for attachment to a relatively -stationary part and presenting 'an athmenafl'ang'e to joinwithsaid first flange, nipple; movable on'its longitudinal axiaproject'ing' through an opening in'said bodyportion said opening providing circumferential clearance with the nipple, a spherical segmental sealing portion on'saidnipple, a spherical segmental seal- "ing 'riztg" floatingly mounted within said body porn' in sealing'relati'onship with said-sealing porands'a'id' bodyportion, a cylindrical guide in hi ch oneend' ofsaid "nipple is journaled'and nsaidbodyportion', and. a. spring seatedon d guide adapted to urge said guide against searing -por ion- 2. A self supporting pipe joint'for relatively fniovable pipesections, comprising a cup-shaped 'bodyp'orti'on having an" aperture defined in 'one floating movement of said ring relative to said fixed mia'mberwith 1 said'nealing portions in seal- 1129' reZdtionsIiipIa radial I face on said ring" 'to' prov'z'de a s'edlingpdrtion on the side'of said ring v npposite 'said secondsealing portion; a radial face en said fixed member to 'iibfovide 'a' sealing; portion enyageableibithsaid fiTStradiaZ fa'ce'to form i a seaUand da-iali'y acting. spring-meanspositioned between said members-70Wholding' saidsealing r ing between' the sli'id isealina' portions 'ofsaid members.

0: MONROE.

-=""-REFERENGES CITED The following" references are of record iri the I file" Of this patent or the 'oii'ginal patent:

UNITED "STATES PATENTS Burkhar'dt May=7;'*194l)

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