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Патент USA US2407746

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. Sept. 17, 1946.
F. JACOBSON
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ROTARY JOINT
2,407,745
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Filed Aug. 9, 1944
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-Y-INVE TO'R/
W ATTORQYIS
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Patented Sept. 17,1946
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2,407,745
uNITEoj “STATES “ PATENT ‘OFFICE, _ J
2,407,745 ‘_
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ROTARY JOINT
‘ ‘__‘ ‘Q "Application
‘ i _' FranzmJ'acobson,
August 9, 1944,
New ‘York,
‘Serial N.
No.Y.‘
548,683 "
‘9 Claims.
(01. 285-973) '
This invention relates to coupling and more
particularly ‘to 1a rotary ‘or- swivel joint construc
threaded portion H is suitablyshapedQfor exe
ample, as ‘a nut l2,‘.or has other‘suitable shape
tion to be used with conduits conveying liquids,
for the application thereto of a tightening tool‘. .
steam or gases under pressure‘or vacuum, at high
The, housing member B ‘consists of; a .‘hollow
part having-a reduced portion. l3 at one; end
‘or lowtemperaturesi" The'joint ‘is distinguished
in having as principal‘ieatu-‘res; exceptional‘ea‘se ,
‘of rotatiorr-and-'all-metal-ic v ‘
tion.‘
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A
threaded externally at 14. ‘.The threaded portion
[4 is adapted to receive theinternally threaded
A principal object “of {th‘e'inv _ rf'isto provide ' portion ll of member A. An. annular shoulder
a swivel joint that moves so easily‘ that it swivels
IE on. the ‘member B limits ‘the depthto. which
orl rotates when attached to ?exible hose and the 10 member A can be screwed onto member B. . Other
latter is subject to twist. ‘It thereby is capable of
means for ‘assembling or securing the housing
eliminating‘twist from‘ hose when the latter is
members A and B together .may be ‘provided;
twisted and thereby‘greatly ‘prolongs the life of
the hose.
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The stationary member G is preferablylintegral
with housing memberB. and is threadedxinten
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Another object of the invention is to provide a' 15 nally at l6 for attachment to a pipe or .otherrcon—
swivel joint of this character of al1~metal con
duit.(not shown). It maybe otherwise provided
struction that is easily moved or swivelled. ‘
with assorted means for attachment‘ to pipes or
A further object of the invention is to provide
a rotary joint in which the cost of maintenance
The housing member B is provided with an in‘
is reduced ‘bythe elimination of any requirement 20 ternal chamber I‘! for a purpose to be presently
for repacking and furthermore reduced by virtue
described. This chamber communicates with the
ofits‘low frictional resistance.
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outlet l8 of stationary memberG through an
Yet another object of the invention is to (pro
opening it. The latter is provided with a tapered
vide a joint that is entirely leakproof and capable
portion 20 adjacent its inner end. .This portion
of lateral alignment with ‘adjacent equipment. . 25 20 is so admeasured as to provide the shoulders
To the accomplishment of the foregoing and
2| and 22 adjacent to its ends. The member G
such‘other objects as may hereinafter appear,
may be shaped externally to receivea suitable
the invention consists in the novel construction
tightening tool.
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and arrangement of parts hereinafter described
7 An annular ringlike base or caplmembe‘r 23
and then sought to be de?ned in the appended 30 provided with a conical portion 24 substantially
claims, reference being had to the accompanying
complemental to the tapered portion 2ll| is sup
drawing forming a part. hereof, which shows
ported in the latter in leakproof manner‘ as by
merely for the purposes of illustrative disclosure
a press ?t. This cap member 23 is provided with
a preferred embodiment of the invention, it being
a receiving groove 25 into which one end of the
conduits.
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expressly understood, however, that changes may 35 elastic, metallic, tubular element C is positioned
be made in practice within the ‘scope of the
and suitably attached as by brazing 26 or the like.
The elastic or resilientltubular element 0 may
beam the form of corrugated metallic tubing or
bellows or of equivalent construction. An annu
, Figure 1 is an elevational ‘View of the device; 40 lar capping ring 2'! is provided with an annular
groove 28 into which the opposite end of member
Fig. 2 is a sectional view takenalong line 2-2
C extends and is suitably attached as by brazing
of ‘Fig. 1_ and ‘viewed in the direction of the ar
29 or the like. The capping ring 27 is provided
claims without digressing from the inventive idea.
In the drawing in which similar reference
characters denote corresponding parts:
and
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rows.
‘ Referring to the drawing, the ‘principal ele
45
ments comprise housing members A and B, an
elastic, metallic element C, a rotary end member
F, a stationary end member G, and anti-friction
means H. These parts or members are assem
bled as will be presently described.
,
with a concave groove 30 for a purpose to be
presently described. ‘
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The rotary end member F is tubular and is
threaded suitably at 3| for attachment to ?exible
tubing (not shown) or the like. The member F
extends through the opening 32 formed by ?ange
50 10 of housing A into the chamber 33 of said hous
The housing member A consists of a tubular
part having an inwardly‘ extending annular
?ange It] adjacent one end. The internal diame
ter of member A is slightly enlarged adjacent its
opposite end and internally threaded at H. The 55
externalface of themember A_ adjacentthe ‘
ing member A. Said member F is admeasured in
diameter to pass through said opening‘32 with
su?icient clearance to permit lateral offset of
member F. with respect to housing member A for
a purpose to be presently’ described. An‘ annular
?ange-"i4 extends laterally‘fromthe'member F
2,407,745
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no tendency for surface 30 .to be ‘moved away
from edge 38. In addition, the press ?t between
the member 23 and part B at the portions 24, 2|]
insures leak proof connection between the parts .
within the chamber 33. This ?ange is admeas
ured as to provide clearance between its outer
surface and the walls of chamber 33, at least
equal to the clearance between ?ange I0 and the
surface of member F. A portion 35 of the'mem
ber F having reduced external diameter extends
beyond the flange 34 and into the opening Within
the ring.‘ or capping. member 21;, with. a. slight
clearance 33;,- An annular ?ange =orwprojection
31 extendslongitudinally fromthe ?ange 3'4 and
at this point.v
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The easy rotation or swiveling action of mem
, \ber F is effected by the hair line contact'betweeni
edgey38 and surface 30, the counter pressure ac- '
10
> is provided with a rounded edge 38. This ?ange.
or projection 31 is admeasured in length so that’ '
its rounded edge 38 engages thesurface of the.
concave groove 30 with circular substantially
.Ftion "oif?pressure'v inv chamber "42", the lubricant in 7
sai'cl‘ chamber, the anti-‘friction member H, and
.in addition by makingthe projection 31 and its
edge 38 and the ring member 28 and its surface .
I 30*of'such metals, for example, bronze that offer
minimum frictional resistance. This easy rota
tionof (member F is such that any twist in ?exible ,
hair-line contact. Both the edge 38"and<the~sur-:
face>30 are highly polished to: insure leakproof 1 _ hose on rotation can automatically unwind.
' contact therebetween, and furthermore so that
The clearance 32 between member F and ?ange »
minimal frictional resistance is offered by this‘
iil'l'oif housing member A permits the rotary end
measuredilin length-that, when the parts A ‘and
equipment; does not align Withthecenter line
through-the joint.‘ When-this ‘is done, the~elastic
or Iresilient' constructionof member C‘permits it
‘ F to ‘be offset and aligned with parts to be con
contact upon rotation of‘ the end memberF rela
tive to'ring member 21. The member Cissoad- 1 nected to saidjend ifthe center lineofadjacent
7 Bare, screwed together inassembly, said member.
'CJisput under. ‘compression and then‘ the resil-v
'ren'cy? of member '0 urges the surface'30 of. the
ring'member Z‘Iint'o the aforesaid hair-line con
tact with edge 38'. The surface 30 may be'i'lat or‘
have other shape than thatshown.
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"The anti-frictionmeansI-Iof any suitabletype,
for'l example,- ball bearings 33 within raceways >46,
Mxis'carri'ed suitably on the? member F between
thelz-?anges l0 and 21 and serves to reduce fric-.
tion to'a minimum be'tweenthe parts A and F
uponirotation ‘of . the latter.
~ ,Thee'flange orv projection 37‘, the. cylindrical
extension~35 'ofinrember F andv the ring member
21’! ‘de?nean‘ annular counter-pressure chamber
to <givegsu?iciently to permit lateral movement or
alignment of said memberi?withithe other part ‘
without causin
between edge.
i The ‘construe
e'al‘ geiat- the‘liairlinexcontact
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n'de'scribed is an all-metal one,
the parts,;~A, B. F, G-and [12-3 beingrconveniently
made of. brass-brother suitable'metal, the;;part
C being of-spring brass or other suitable metal,
the parts 21 and 31 being preferably ofsuch
metals that oifer minimum frictional resistance;
and the anti-friction means‘ H1 being of'metals
usually used for such purposes.-
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While a speci?c embodiment of the- invention
' has beendescribed, it is tobe understood that ,
42 to'w'hich ?uid or gas pressure prevailingwith
changes and variations in structural detail .may
in. there'silient member C maybe transmitted
through the clearance 36. Thus vitris possible to a be mad-sand are contemplated .within’the-scope
oounte'ractthe prevailing; fluid or gas pressure 40 of the claims. There is no intention'of' limitae '
withirrsaid‘ member ‘C which ‘acts toward the ro-.
tarry‘ end member F, and thereby. to reduce the
pressure against concave surface 33 and propor
tion to the exact details‘shown» and described. _ .
Whatis claimed is:
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1-. A? rotaryjoint of the character described
tionately-reduce the frictional resistance between ‘I comprising metallic housing members- adapted
said surfaceran'd curved edge 38 when saidmem 45 to be assembled together, a metallic member
supported- in rotary manner wtih respect to said
berg F is rotated or. 'swivelled. The chamber ‘12
housing members, and projecting outwardly of
serves additionally as a storage chamber ‘for 'a
lubricant and seepvproo?ng means such-asgrease
oh-oil;
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In operation, the housing: part A is screwed
tightly on to the part‘ 13, thereby putting the
element 0 under ‘compression.v The compressed
element ‘C presses the surface ‘30 againstv ‘the
one ‘thereof; . an "elastic ‘metallic tubular element
?xedly. supported within‘ and with respect to the
other of said. housing :membersg. means’ secured
to said element and providing a. metallic anti.
friction surface, metallic means projecting from
said ‘rotary member for engaginglsa‘id‘ surface
round .edge 33‘of the'annular projection;31, thus ' - with a linecontactleakproof seal; said two last
forming al‘eak-proof joint between'edgesl3'8 and
surface 30. The grease or lubricant in the cham
ber 42' further; insures the. seal by preventing
seepage. The "stationary end G may. ‘then. be
named means and aportion ‘of said rotary .mem
ber de?ning a ‘chamber, means to communicate
pressure within the tubular element to said
chamber, and metallic'anti-friction meansv be
tween said? rotary'member and saidv‘?rst ofQsaid
connected wtih stationary piping‘oriother‘equip- ‘
ment, and the rotary end‘ Fconnecte‘diwith the 60 housing members to. permit, free rotation ofthe
rotating part of a machine OT‘Wlbhi?GXlblE tube
ingfor ‘the like. Then ?uidsuch'asgas, steam or
water can be conducted‘through the rotary joint _
Without leakage at any point.
The leakproof nature ofthe joint'isieiiectedlby
providinghigh polish- of the wearing. edge 38xand
surface 30, and by provision of-the'seep proofing
rotaryimember.
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- 2..A rotary joint of the character described
comprising housing members adapted ‘to. be‘; as
' sembledf together, av tubular imemberssupported
in. rotary manner with respect to one of said
housing members and projecting outwardly
thereof, anti-‘friction ‘mea'ns'for so supporting
said'tubular member, av corrugated-elastic tubular
lubricant within the ‘chamber 42. ‘Moreover, it
steam is conveyed through the joint, some of it
will penetrate through clearance 36 into cham
ber 42 and condense into water, forming a'water
“ element, means for ?xedly-supporting one end of
said ‘element about an opening in a second of
said .‘housing ‘members, means secured‘ to the op
seal», Whatever steam accumulates in chamber
posits 'end-of-said tubular element and-‘providing
42'v is at lower pressure than the ‘steam within ‘
an anti-friction‘ surface, ‘means _ projecting, from
element C’because of ‘the pressure-reducing-‘ac- '
said tubular me-mberjfor engaging saidsurface
time of the small clearance’ 36;.so that‘ there is 75 with line contact to-provide a vleakproof"‘seal;
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2,407,745
said two last-named means and a portion of said
tubular member de?ning a chamber, means to
communicate pressure within said tubular ele
ment to said chamber, and said chamber being
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chamber, means to communicate pressure with
in said tubular element to said chamber, and
said chamber being arranged so that pressure
communicated thereto counteracts said pressure
Within said tubular element that acts to force
said surface bearing means against said project
arranged so that pressure communicated there
to counteracts said pressure within said tubular
element that acts to force said surface bearing
ing means, thereby tending to reduce friction at
means against said projecting means, thereby
the said line contact.
tending to reduce friction at the said line con
6. A rotary joint of the character described
tact.
10 comprising housing members adapted to be as
3. A rotary joint of the character described
sembled together, a tubular member, means for
comprising housing members adapted to be as
rotatably supporting said tubular member with
sembled together, a tubular member, anti-friction
respect to one of said housing members, a resili
means for rotatably supporting said tubular
ent metallic tubular element, means for support
member with respect to one of said housing 15 ing one end of said element in leakproof manner
members, means for attaching said tubular mem
about an opening in a second of said housing
ber to other parts, a corrugated tubular element,
members, ringlike means secured to the opposite
means for supporting one end of said element in
end of said resilient metallic element and pro
leakproof manner about an opening in a second
of said housing members, means for securing an
other part about said opening, ringlike means
secured to the opposite end of said corrugated
element and provided with an anti-friction, con
cave surface, a tubular portion extending from
said tubular member into said ringlike member
with small clearance therebetween, means pro
jecting from said tubular member for engaging
said concave surface with line contact to provide
vided wtih an anti-friction, concave surface, a
tubular portion extending from said tubular
member into said ringlike member with small
clearance therebetween, means projecting from
said tubular member for engaging said concave
surface with line contact to provide a leakproof
seal, said tubular portion, projecting means and
concave surface de?ning a chamber, said clear
ance providing a communication to said cham
ber for pressure from within said resilient metal
lic element, and said chamber being so arranged
means and concave surface de?ning a chamber, 30 that pressure communicated thereto counteracts
said} clearance providing a communication to
the pressure within said resilient metallic ele
said chamber for pressure from within said cor
ment that acts to force said concave surface
rugated element, and said chamber being so» ar
against said projecting means, thereby reducing
a leakproof seal, said tubular portion, projecting
ranged that pressure communicated thereto
friction at said line contact.
counteracts the pressure within said corrugated 35
7. A rotary joint of the character described
element that acts to force said concave surface
comprising housing members adapted to be as
against said projecting means, thereby reducing
sembled together, a member supported in rotary
friction at said line contact.
manner with respect to said housing members,
4. A rotary joint of the character described
and projecting outwardly of one thereof, an elas
comprising housing members adapted to be as 40 tic tubular element ?xedly supported within and
sembled together, a tubular member supported
with respect to another of said housing members,
in rotary manner with respect to one of said
housing members and projecting outwardly
thereof, anti-friction means for so supporting
means secured to said element and providing an
anti-friction surface, means projecting from said
rotary member for engaging said surface with a
said tubular member, a springy tubular element, 45 line contact leakproof seal, said two last-named
means for ?xedly supporting one end of said
element about an opening in a second of said
housing members, means secured to the opposite
means and a portion of said rotary member de?n
ing a chamber, means to communicate pressure
within the tubular member to said chamber,
anti-friction means between said rotary member
anti-friction surface, means projecting from said 50 and said ?rst of said housing members to permit
tubular member for engaging said surface with
free rotation of the rotary member, and lubri
line contact to provide a leakproof seal, said two
cant within said chamber.
last-named means and a portion of said tubular
8. An all-metallic rotary joint of the character
member de?ning a chamber, means to communi
described comprising assembled housing mem
cate pressure within said tubular element to said 55 bers, a tubular member supported rotatably with
chamber, and said chamber being arranged so
respect to said housing members, a resilient me
that pressure communicated thereto counteracts
tallic tubular element supported within said
said pressure within said tubular element that
housing members, and means for eifecting a
acts to force said surface bearing means against
leakproof line contact seal between said tubular
said projecting means, thereby tending to reduce
60 member and said tubular element while permit
friction at the said line contact.
ting free rotary movement of said tubular mem
5. A rotary joint of the character described
ber with respect to said tubular element.
comprising housing members adapted to be as
9. An all-metallic rotary joint of the character
sembled together, a tubular member supported
described comprising assembled housing mem
in rotary manner with respect to one of said 65 bers, a tubular member supported rotatively with
housing members and projecting outwardly
respect to said housing members, a resilient tu
thereof, a springy tubular element, means for
bular metallic bellows supported within said
?xedly supporting one end of said element about
housing members in alignment with said tubular
an opening in a second of said housing members,
member, and means for effecting a leakproof
means secured to the opposite end of said tubular
line contact seal-between said tubular member _
element and providing an anti-friction surface, 70 and
said tubular element while permitting free
means projecting from said tubular member for
rotary movement of said tubular member with
engaging said surface with line contact to pro
respect to said tubular element.
vide a leakproof seal, said two last-named means
and a portion of said tubular member de?ning a 75
FRANZ JACOBSON.
end of said tubular element and providing an
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