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Патент USA US3096116

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July 2, 1963
Filed May 15, 1959
2>Sheets-Sheet 1
July 2, 1963
Filed May 15, 1959
2 Sheets-Sheet 2
FIG. 2.
2 ,82
92 *'
60 If
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78\ A)
Patented July 2, 1963
Harold Browning, Hyattsville, Md, assignor to the United
States of America as represented by the Secretary ‘of the
Filed May 15, 1959, Ser. No. 813,604
4 Claims. (Cl. 285-226)
(Granted under Title 35, US. Code (1952), see. 266)
out the several views, there is shown in FIG. 1 a ?exible
pipe-line coupling 11) constructed in accordance with the
instant invention.
The coupling 10' comprises a pair of spaced annular
corrugated members 12 located, for the sake of con
venience, at the ends of the coupling v10. The annular cor
rugated members 12 each has the major axis of its cross—
section extending at right angles to the longitudinal axis
of the coupling, and they are connected together by a
The invention described herein may be manufactured
plurality of nested, S-shaped sections 14, each of which
and used by or for the Government of the United States‘
has a substantially elliptical cross-section, and a ?attened
outer surface.
of Aunerica for governmental purposes without the pay
ment of any royalties thereon or therefor.
Each of the annular corrugations 12 is provided with
an inwardly extending nipple 16 and an outwardly extend
This invention relates to a ?exible pipe-line ?tting, and
more particularly to a pipe-line ?tting capable of either 15 ing nipple 18. Each of the nipples 18 is provided at its
free end with an outwardly extending ?ange 24}. The
separate or combined longitudinal, lateral and angular
inner face of each of the ?anges 20 has in abutment there
with a split, two piece coupling flange 22 composed of
In accordance with prior art practice, most ?exible
pipe-line ?ttings consist of corrugated tubular metal mem
semi-circular ?ange sections 24 and 26 that are held to
bers wherein the corrugations extend substantially at right 20 gether on the nipple 18 by a nut and bolt arrangement 28
angles only to the longitudinal axis of the coupling and
thus are capable of longitudinal de?ection only. Thus
prior art coupling devices of the instant type are capable
of longitudinal de?ection only and are either entirely
and 30. Each of the ?ange sections 24 and 26 provided
with a plurality of holes extending therethrough and
‘adapted to receive a plurality of bolts 32 that are used
for clamping the coupling 22 to a pair of coupling mem
incapable of lateral and/or angular de?ection or have 25 bers 34 and 36 on each of a pair of pipe members 38
and 40 that are adapted to be connected together by the
very poor strentgh qualities insofar as lateral and/ or
instant ?em'ble coupling 10.
angular de?ection is concerned, being easily subject to
Each of the ?attened S-shaped corrugations 14 com
either fracture or other failure when subjected to frequent
prises an outer circular ?at wall 42 having at one end
In accordance with the instant invention, a ?exible pipe 30 thereof an inwardly curved ?ange 44 and at its other end
an outwardly curved ?ange 46, thus in effect each section
line coupling is constructed utilizing some of the features of
14 is provided with an opening in its inner wall. The
the ?orementioned prior art bellows type coupling which
is particularly adapted to compensate for longitudinal de
width of the opening between elements 42 and 44 is
approximately one half its length as may be seen by in
?ection of pipe-line members, and combines with said
structure a modi?ed bellows-like con?guration particu 35 spect-ing the drawings. However, this relationship may be
varied ‘as long as the junction point ‘of 44 and 46 has
larly adapted to allow lateral and/ or angular pipe-line de
or extreme lateral de?ections.
?ection between connected pipe members so as to obtain
room to ?ex inwardly towards wall 42.
The ?attened, S-shaped corrugation 14 nearest the left
an overall, new, novel and inventive coupling capable of
hand end of ‘FIG. 1 has its outwardly directed ?ange 46
both longitudinal and lateral de?ection.
It is accordingly an object of this invention to provide 40 connected to the nipple 16 on the adjacent corrugation 12
by a pair of weld-joints 48 and 50. The inwardly directed
a pipe-line coupling adapted to overcome the aforemen
tioned disadvantages of the prior art.
?ange 44 on the same corrugation 14 is connected to the
outwardly directed ?ange 46 on the next adjacent corru
Another object of this invention is to provide a pipe-line
gation 14 by means of a weld-joint 52. It is emphasized
coupling adapted to compensate for longitudinal pipe-line
45 that the same type of connection is made between each
outwardly directed ?ange 46 on a corrugation 14 and
A further object of this invention is to provide a pipe
the next adjacent inwardly directed ?ange 44 on the ad
line coupling that will allow for lateral and/or angular
jacent corrugation 14, as can readily be seen in FIG. 1.
pipe line de?ections.
The ?attened corrugation 14 at the right hand end of
Still another object of this invention is to provide a
pipe-line coupling adapted to compensate for longitudinal
angular and/ or lateral pipe-line de?ections.
Other objects and many of the attendant advantages of
this invention will be readily appreciated as the same
becomes better understood by reference to the following
detailed description when considered in connection with 55
the accompanying drawings, wherein:
the coupling 16 nearest the annular corrugation 12at the
right hand end, is connected to said annular corrugation
by a weld-joint 54 connecting the inwardly directed ?ange
44 on the corrugation :14 to the inwardly directed nipple
16 on the adjacent corrugation 12.
Referring to FIG. 1 in particular, it is emphasizedthat
pipe coupling constructed in accordance with the instant
the structure shown in said ?gure is adapted to com
pensate for either separate or combined longitudinal, lat
eral and angular de?ections of the pipes 38 and 40 rel
ative to one another.
characters designate like or corresponding parts through
sorbed primarily by the bending of the ?anges 44 and
FIG. 1 is an elevational view, partially in section of a
The longitudinal de?ections are
FIG. 2 is an end View, partially broken away and in sec 60 absorbed by the annular corrugations 12 and the lateral
de?ections by the corrugations 14. The corrugations 14
tion, taken on line 11-11 of FIG. 1; and
being, by virtue of their design, including the ?anges 44
FIG. 3 is a sectional View, partially broken away, of
and 46 respectively, particularly adapted for lateral de
a further embodiment of the instant invention.
?ection. Any either lateral or angular de?ection is ab
Referring now to the drawings wherein like reference
98 that is adapted to be tightened by a screw member 1%.
The other end of each sleeve 96 is clamped by a like
clamp ring 93 to the inwardly directed shoulder 68 on
each of the ?anges 64. The braided sleeves 96 by their
inherent nature tend to resist twisting, tending when
46 relative to the outer surface v42 of each corrugation
1.4. It has been well established that a corrugation such
as 12 is adapted largely for longitudinal de?ection only
and is of little value insofar as lateral de?ection is con
cerned, thus the instant invention provides a coupling
adapted to absorb both lateral and longitudinal de?ec
tions by the pipes 38 and 40.
twisted to tighten about the corrugations 14, thereby pro
viding added reinforcement for said corrugations, and
therefore for the coupling ‘56 as a whole.
Attention is directed to FIG. 3 wherein is shown a
modi?ed embodiment of the instant invention. The mod
i?ed embodiment of the invention shown in FIG. 3 is a
combination coupling 56 including, among other ele
ments, a plurality of the S shaped, elliptical cross-sec
Thus it is emphasized, that the instant invention, and
more particularly the embodiment shown in FIG. 3 pro
vides a ?exible coupling of relatively simple construction
and sturdy nature, that is adapted to absorb the effects of ‘
tional corrugations 14 shown in FIG. 1, said corrugations
either separate or combined lateral, longitudinal and an
gular de?ections of connected pipe members relative to
14 being in the case of the embodiment shown in FIG. 3,
utilized adjacent the respective ends of the coupling. The 15 one another whereas prior art ?exible coupling devices
have largely been adapted to o?set the effects of longi
endmost corrugations 14 at each end of the coupling 56 is
tudinal de?ection only, by using only annular corruga
connected to a nipple 58 by means of a weld-joint 60.
tions such as 12 and 72 shown in .FIGS. 1 and 3 of the
The nipple 58 has an outwardly directed ?ange 62 in
instant case.
abutment with the outer face of a coupling ?ange 64
It should be understood of course that the foregoing
which, like the coupling ?ange 22 shown in FIG. 1, con 20
disclosure relates only to preferred embodiments of the
sists of a pair of ?ange sections of the type shown in
instant invention and that numerous modi?cations or al
FIGS. 1 and 2, and which are connected together by a
terations may be made therein without departing from the
nut and bolt arrangement such as elements 28 and 3%)
spirit and scope of the invention as set forth in the ap
shown in FIG. 2. It is emphasized that for the sake
pended claims.
of convenience, FIG. 3 shows only a portion of the struc
What is claimed is:
true, since said structure is symmetrical about a longi
1. A ?exible coupling comprising, a plurality of corru
tudinal axis in much the same manner as the structure
gations connected together to form the longitudinal length
shown in FIG. 1.
The coupling ?ange 64 is also provided with a plurality
of the ?exible coupling, at least one of said corrugations
of bolt receiving holes 66, and an inwardly directed shoul 30 being annular and having a cross-section that is sym
metrical about an axis extending at right angles to the
der 68 for purposes hereinafter described. The coupling
sections 14 at each end of the coupling 56 are of course
longitudinal axis of the coupling, and the remainder of
said corrugations ‘being substantially S-shaped with the
adapted to allow for lateral de?ection of the coupling in
major axis being ‘disposed parallel to the longitudinal
much the same manner as the embodiment shown in
FIG. 1.
The embodiment shown in FIG. 3 obtains its longitu
dinal de?ection qualities from a corrugated tube 7 0 hav
ing a plurality of substantially annular corrugations 72.
The corrugated tube 70 is provided with an outwardly di
rected nipple .74 at each end thereof. At each end the
nipple 74 is connected to the inwardly turned ?ange 44
on the nearest torus shaped corrugation 14, by means of
a weld-joint 76-.
axis of'the coupling, whereby the ?exible coupling is
adapted to connect together a pair of tubular members,
and to yield to longitudinal, lateral and angular de?ec
tions of said tubular members; each of said corrugations
having an opening therein exposed to the interior of the
coupling, and each of the S-shaped corrugations having
a portion there of comprising a substantially cylindrical
outer surface, a first ?ange extending inwardly from said
outer surface toward the interior of the coupling and in
juxtaposed relation to the outer surface forming a
In order to reinforce the annular corrugations 72 against
lateral de?ection and/ or expansion, for which type of de 45 U-shaped cavity whose width is approximately one-half
?ection they have comparatively little strength, the corru
its length, a second ?ange extending away from said ?rst
gations 72 are provided with a plurality of external, semi
?ange and forming an ogival curve, the inner leg of said
ogival curve extending substantially parallel to the longi
circular, nesting reinforcing bars 78, each having a por
tion thereof located in the spaces between adjacent corru
tudinal axis of the coupling and toward ‘an immediately
gations 72 and extending half way over the outer, top por 50 adjacent S-shaped member, and wherein the second ?ange
tion of each corrugation, in the manner shown in FIG. 3.
of one S-shaped cor-rugation has a free edge ?xedly at
Each of the endmost of the corrugations 72 is provided
tached to the free edge on the inwardly directed ?ange
with a pair of split ?anges 80 and 82. The split ?anges
on the :next adjacent corrugation, whereby a plurality of
80 and 82 are held together by bolts 84 in much the same
nested S-shaped corrugations are formed which are free
manner that the bolts 30 hold together the ?ange sections 55 to ?ex on substantially all points from one ?xedly at
24 and 26 shown in FIGS. 1 and 2. Each of the ?ange
tached point to the next.
sections 84} and 82. is provided with an outwardly directed
2. A ?exible coupling as set forth in claim 1, further
shoulder 86 and 88 respectively that is in abutment with
characterized by a metal woven sleeve surrounding said
the outer surface of the respective nipples 74.
S-shaped corrugations ‘and having the strands thereof ex
In addition the ?anges 80 and 82 are connected to
tending diagonally of the longitudinal axis of the cou
gether by a plurality of bolts 90 slidably mounted in at
pling, said sleeve having its opposite ends ?xedly ‘attached
least one of the respective ?anges 8t} and 82, in a radial‘
to the opposite ends of that portion‘ of the coupling in
ly extending slot 91 in each ?ange and each has a head
cluding the S-shaped corrugations, to provide a means
92 at one end and a nut 94 threaded onto the other end.
The bolts 90 are hereinafter designated as stop bolts since
they prevent excessive longitudinal expansion of the cor—
rugation 72 and at the same time serve to retain the
adapted to resist twisting and lateral expansion of the
3. A ?exible coupling as set forth in claim 1 further
characterized as having ‘a pair of spaced, annular corru
semi-circular reinforcing bars 78 in nesting position about
gations each having ‘a cross-section symmetrical about
the corrugations 72.
an axis extending substantially at right angles to the longi
T0 provide the coupling 56 with resistance against 70 tudinal axis of the coupling, said annular corrugations
twisting, the S shaped ?attened corrugations 14 are sur
being located at the opposite ends of the coupling.
rounded by a braided wire or strip metal mesh 96. Each
reinforcing sleeve 96 has one end thereof tightly con
nected to the shoulder 86 and $8 on the respective ?anges
80 and 82 by means of a conventional split clamp ring
4. A ?exible coupling as set forth in claim 1 further
characterized as having a plurality of annular metal cor
rugations each of which has a cross-section symmetrical
' about an axis extending substantially at right angles to
the longitudinal axis of the coupling, and wherein the
second ?ange of one S-shaped corrugation has a free
edge ?xedly attached by Welding to the ‘free edge on the
inwardly directed ?ange on the next adjacent corrugation.
References Cited in the ?le of this patent
Fulton ______________ __ NOV. 7, 1916
Kopperman __________ __ July 20, 1948
McNeary ___________ __ Sept. 25, 1951
Sohwester ___________ __ Oct. 27, 1953
Le Vantine __________ _._ Dec. 23, 1958
Hansen _____________ __ May 12, 1959
Bowditch _____________ __ July 7, 1959
Brinkrnan ___________ __ May 18,
Saforcada ___________ __ Oct. 19,
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