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Патент USA US2412810

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Dec. 17, 1946.
T.
HILL
2,412,810
SWIVELING FLUID JOINT
‘Filed Sept. 9, 1944
2 Sheets-Sheet 1
3
THOMAS
M
‘
M
,
C. HILL
0
Dec. 17, 1946.
T, Q HlLL
‘
‘
2,412,810‘
SWIVELING FLUID JOINT
Filed Sept. 9, 1944
‘2 Sheets-Sheet 2
1__.
i
as
THOMAS
C. HILL
Show“,
Patented Dec. 17, 1946
2,412,8l0 _
UNITED STATES PATENT OFFICE
SWIVELING FLUID JOINT
Thomas 0. Hill, Parkville, Md., assignor to The
Glenn L. Martin Company, Middle River, Md.,
a corporation of Maryland
Application September 9, 1944, Serial No. 553,354
5 Claims.
(Cl. 285-963)
‘
‘
1
This invention relates to a swivellable plural
?uid joint, and more particularly to a double pipe
joint for introducing and removing ?uid from a
hydraulic motor or the like where the motor cyl
inder may be out of axial alignment with the
,
2
the sections ‘being. held together by bolts 23 pass
ing through the offset abutting edges of the spe
cial members. The adjacent edge portions of
the spherical members l9 and 2| are partially
cut away adjacent the extended portion of the
rigid ?uid supply line.
An object of the invention is to provide a swiv
?uid casing |5 so that the hydraulic motor may
be moved relative thereto in a limited plane, the
movement of the ball |'| being limited by the cut
ellable head on the end of a hydraulic cylinder
‘away edges 25 and 21 of. spherical sections l9
in such a manner that the hydraulic lines lead
ing to and from the cylinder will function prop l0 and 2|. Movement of the hydraulic motor with
relation to the ?xed spherical sections is accom
erly when the ?uid lines are not in axial align
plished by moving the hydraulic motor laterally
ment with the cylinder. In the present inven
in the slot de?ned by the cut away edges 25 and
tion the inlet and outlet lines may be held in a
21 of‘ the spherical sections l9 and 2| until the
?xed position and the ?ow of ?uid passed through
the joint into a hydraulic cylinder which is out 15 central section l3 reaches the ends of the slot 29
or 3|, as shown by the dash lines in Fig. l, and
of alignment in any direction with the joint itself.
While this general type of ?uid joint construc
the ball may also swivel or move within the limits
tion has many applications, it has been found _
of the slot as de?ned by the'spacing of the edges
particularly useful in modern aircraft where vari
25 and. 21.
.
The spherical ball holding sections l9 and 2|
ous elements are operated by hydraulic motors 20
are provided with diametrically positioned inlet
and due to structural strains and misalignment
of the airplane the hydraulic operating lines and
?uid joints and the motors themselves are moved
and outlet ?uid ports 33 and 35 joined to rigid
hydraulic ?uid lines 31 and 39, respectively. The
cylinder head I5 and ?uid casing I6 terminating
with relation to each other. By the use of a
joint as hereinafter described, a limited misalign 25 in the ball-like member H are provided with two
" horizontal ?uid passages 4| and 43, respectively,
ment in any direction is permitted with the vol
for conveying ?uid to and from lines 31 and 39.
ume of inlet and exhaust ?uid maintained at full
capacity and without leakage at the joint._
In the drawings:
Fig. 1 is a. cross-section taken on line |—| of . 30
The ?uid conduit 4| has itsoffset portion termi
nating in an enlarged diameter peripheral port
45 receiving and discharging ?uid from the cas
ing port 33. The second hydraulic passage 43 is
also made with an enlarged lip or port ?l. It
thus will be obvious that when the hydraulic mo-'
Fig. 3 is a vertical section taken on line 3-3 I‘
of Fig. 1 looking in the direction of the arrows;
tor cylinder |, with its end ball section l1, ro
and
35 tates between the limits of the edges 25 and 21,
Fig. 4 is a vertical section taken on line 4-4~
the two ?uid circuits will always be open and
of Fig. 3 looking in the direction of the arrows.
?uid will pass in and out of pipes 31 and 39 as the
discharge area of the enlarged lips 45 and. 41 of
As illustrative of one use of the invention, it
is shown in connection with a conventional 11y
pipes M and 43 is such as to compensate for this
draulic motor cylinder 1 having a working piston, 40 rotary or swivellable action. A tight ?uid seal
3, and piston rod 5 therein is reciprocated back
is maintained between the periphery of the inner
and forth in the cylinder by ?uid pressure means
spherical sections l9 and 2| by means of circular
applied in both directions. As before stated, the
grooves 5| having O-rings 53 therein. This con
piston rod 5 may operate any desired mecha
struction allows the movable parts to be lubri
nism, not, shown. The inner end of the cylinder 45 cated by the hydraulic ?uid while preventing
l is attached to the swivellable ?uid joint‘by bolts
actual leakage.
7 passing through openings in the cylinder head
The ?uid conduit 4| at the end of the ?uid
85 and cooperating with nuts 9 on the outer ends
casing l6 adjacent the interior of the cylinder
of bolts for binding against a clamp ring ||
| is plugged by means of a machine screw 55 so
against the annular shoulder l3 of the end of the 50 that the ?uid therein is blocked off and will pass
cylinder l. The cylinder head l5 also forms the
through ?tting 51 into piping 59 leading to the
hydraulic casing or extension l6 for the hy
opposite end of the hydraulic cylinder, not shown.
Fig. 3 in the direction of the arrows;
Fig. 2 is an end elevation of Fig. 1;
draulic operating lines and terminates into a
substantially ball-shaped member l1, rotatably
I claim:
»
1. A swivellable, plural conduit pipe joint in
mounted within two spherical sections l9 and 2|, 55 cluding a fixed portion comprising two semi
9,419,810
spherical members secured together, the corre-,
. member
are ?uid communication with the
‘ ?uid ports in the semi-spherical members when
sponding abutting edges of the two members be
ing cut. away throughout a minor portion thereof _
the plural‘ conduit and ball-like member are
to provide a- slot therebetween, ?uid inlet and
outlet supply pipes leading. to‘ and from the semi
spherical members and ‘a ‘swivellable ball-like
' moved within the con?nes of the slot.
4. A swivellable plural pipe joint including a
pair of semi-spherical members having radial
member having' a radial extension thereon
- mounted within the two semi-spherical sections
edge portions for securing the sections together, _
and a cut away portion forming a circumferential
with the said radial extension projecting from the
slot between a portion of the adjoining edge of the
slot formed by the edges of the cut-away portions 10. semi-spherical portion; ?uid ports leading into ‘
of the semi-spherical members, and ?uid passages - the central spherical faces of the semi-spherical
extending through said radial extensions and said - members, a plural conduit of lesser width and
ball-like member, the inner ends of said pas
vthickness than the circumferential slot mounted '
sages communicating with the ?uid pipes lead
' therethrough and tenninating in a ball-like,
ing to and from the semi-spherical members re 15 member of substantially the same diameter as the
gardless of the position of said radial extension. ’
interior of the semi-spherical members, the in- -
2. A 'swivellable, plural conduit pipe joint in
cluding a ?xed portion eomprising two semi
spherical members secured together, the abutting
ner ends of the ?uid passages in the plural con- '
duit areout turned in direction within‘ the ball
‘like member, and spaced, parallel circumferen
edgesv of the two members being cut away 20
' tial packing grooves of similar diameter formed throughout a minor portion to provide a slot
on the ball-like member on opposite sides of the
therebetween, ?uid inlet and outlet supply pipes
leading to and from the semi-spherical’ members
ends‘ of the ?uid passages therein, the ends of the
pipes being in ?uid communication with the ?uid
and a swivellable ball-like member having a ra
ports in the semiéspherical members whenthe _
dial extension thereon mounted within the two 25 "plural conduit and ball-like member are moved
semi-spherical sections with the said radial ex
within the con?nes, of the slot.
tension projecting from the slot formed by the
5. A swivellable plural pipe joint including a
edges of the cut-away portions of the semi-spher
pair of semi-spherical members having radial
ical members, "and ?uid passages in said radial
extensions and said
all-like member,- the inner“
ends of‘ said passage being ?ared in diameter
> edge portions, means for securing the edge'sec
tions together, and a cut away portion forming
~ a circumferential slot between a portion of the
so
whereby the ?ared portions are; always incom
adjoining edges of the semi-spherical portions,
munication with the ?uid supplyv lines leading- to
?uid ports leading into the central spherical faces '
and from the semi-‘spherical .mémbers’regardl‘ess' _
ofthe semi-spherical members, a plural conduit
of the position of the radial‘ extension-‘lathe "slot. .35 .of lesser width and thickness than the circumfer
3. A swivellable plural ‘pipenj‘oint; including a j::.enaa1, slot mounted therethrough and terminat
pair of semi-spherical members ‘having radial
ring in a ball-like member of substantially the
edge portions for securing the; sectibns-together,‘ ' same diameter as the interior of the semi-spher
>
and a cut away portion formingiafcircumferen
ical member, the inner ends of the ?uid passages tial slot between a portion of the'~-adjoining_ edges 40 in the plural conduit being out turned in direc
of "the semi-spherical portion, ?uid ports leading
tion within‘ the ball-like member, the ori?ces
into the central spherical faces of the semi-spher
thereof being ?ared to a diameter greater than
ical members, a plural conduit of lesser width and
the diameter of the remainder of the passages
thickness than the circumferential slot mounted . and remaining in ?uid communication with the
therethrough and terminating in a ball-like
?uid ports in the semi-spherical members when
member of substantially the same diameter ‘as the
interior of the semi-spherical members, the inner
ends of the ?uid passages in the plural conduit
are out turned in direction within the ball-like
the plural conduit and ball-like members are
moved within the con?nes of the slot and out of
axial
alignment.
_
'
THOMAS (.7.v
'
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