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Патент USA US2412394

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Dec. 10, 1946.
Filed Nov. 12, 1943
27 23
,4 /
53"; 14 ‘
A Trcw/v: Y
Patented Dec. 10, 1946
Dilys L. Giles, Burbank, Calif.
Application November 12, 1943, Serial No. 510,051
1 Claim. (Cl. 285—97.5)
This invention relates to a‘ swivel pipe ?tting
and has for its principal object the provision of a
simple economical and highly e?icient swivel pipe
?tting which can be quickly and easily applied to
the pipe without the use of unions; which will
allow free rotative movement of the pipe without
leakage; and in which there will not be mechani
placed upon the gaskets to crush or deform the
latter since all stresses are absorbed by the ?anges
I2. The‘ nipples are free to rotate with their
?anges l2 sliding in the groove 20 of the collar
and with the gaskets l4 sliding on the tube I3.
The outer surface of the latter may be ground
on a centerless grinder to accurate dimension
so that a perfect seal is obtained at any point
cal damage or crushing of the sealing gaskets.
thereon. Any wear will occur between the gaskets
Other objects and advantages reside in the
detail construction of the invention, which is de 10 and the tube. The elements can be economically
signed for simplicity, economy, and e?iciency.
In Fig. 4, an alternate form of the invention
is illustrated employing exactly the same prin
lowing description.
ciple. In this form, the same nipples Ill are used
In the drawing:
Fig. 1 is a side elevation illustrating a straight 15 with their gaskets M slipped over the extremities
of a curved tube 2!. The tube 2| may be curved
form of the improved ?tting;
to any desired angle. As illustrated it is formed
Fig. 2 is a longitudinal section thereof, taken
as a 90° elbow. A curved housing 22, formed in
on the line 2—-2, Fig. 1;
' '
two halves, is clamped about the curved tube 2!
Fig. 3 is a cross section therethrough, taken on
20 by means of clamp bolts 25 passing through suit
the line 3-3, Fig. 1; and
able bolt holes 23. The bolt holes 23 are formed
Fig. 4 is a longitudinal section'through the in- .
These will become more apparent from the fol
in bolt ?anges 24, projecting from the opposite
sides of each half of the housing 22. The oper
The improved ?tting consists of two similar
ation and advantages of this form are exactly
terminal nipples, which may be provided at their
outer extremities with either male or female 25 the same as the previously described form. It
also comprises only three different simple parts
threads on ?anges on blank ends for welding
with the nipples It being interchangeablevwith
(male threads have been illustrated). The inner
the previous form.
extremities of each nipple is enlarged to form a
While a speci?c form of the improvement has
bell-like socket ll terminating in a peripheral
30 been illustrated herein, it is desired to be under
?ange l2.
stood that the same may be varied, within the
The two niples are sealed to each other by
scope of the appended claim, without departing
means of an inner tube l3, having the same in
from the spirit of the invention.
ternal diameter as the nipples. The extremities
Having thus described the invention, what is
of the tube I3 extend into the belled extremities
ll of the nipples. The nipples are sealed to the 35 claimed and desired secured ‘by Letters Patent
tube l3 by means of suitable resilient, annular
A ?tting for connecting the extremities of
sealing gaskets l4 which are carried in internal
two lengths of pipe so as to allow relative rota
ring grooves in the sockets l I, and which are com
tion of said lengths and to prevent relative an
pressed between the grooves and the tube snugly
engaging the outer surfaces of the latter. The 40 gular or axial movement thereof comprising: two
similar nipples; a threaded outer extremity on
two nipples are maintained in proper spaced rela
each nipple; a similar enlarged cylindrical socket
tion on the extremities of the tube l3 by means
vention arranged as an elbow ?tting.
on the inner extremity of each nipple; a periph
of a split collar 15 formed in two similar half
sections. Each section is provided with bolt
’ eral ?ange surrounding the open extremity of
?anges l6 containing suitable bolt openings l‘! 45 each socket; a cylindrical inner tube terminat
ing in each socket and connecting the two; an an
for the reception of clamp bolts l8. The collar
H3 is enlarged at its extremities as shown at l9,‘
and these enlarged extremities contain an in
ternal groove 28 for the reception of the
?anges l2.
nular sealing gasket surrounding each extremity
of said tube, said gaskets being mounted in
grooves in said sockets; a split collar surrounding
50 the inner tube intermediate said sockets and
The simplicity of the improved coupling can
be readily seen. It consists of only three differ
ent parts, since the two nipples I0 and the two
halves of the collar l5 are duplicates. It is not
necessary that the connection between the collar 65
and the nipples be ?uid tight since the ?uid is
stopped off by the gaskets I4. No strains are,
maintaining the latter separated; enlarged ex
tremities on said collar provided with internal
grooves in which said ?anges are rotatably
mounted; and means for securing the two halves
of the split collar together.
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