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Патент USA US2132564

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Oct. Y11, 1938'.
yT. A. GRAHAM ET AL
DRIP LIP TUBING
Filed Dec. 21, 1936 A
i.
2,132 :564
. o‘ y2,132,564
` Patented occ-11,1938
AUNl'rlazD STATES Pißkrrs'N'rl OFFICE
.
2,132,564.V
DRIP LIP TUBING
Thomas A. Graham, Ellwood City, Pa., and Her
bert W. Mollison, Iulighland Park,v Ill., assignors
to National Tube Company, l a corporation of
New Jersey
.
Application December 21, 1936, Serial No. 117,104
1 Claim. (Cl. 257-179)
This invention relates to drip lip tubing, and tion of, and intimate contact between, the tubes
6 and l0, heat is readily transferred between the
particularly refers to drip lip tubing that is pro
inner and outer surfaces of the tubular article ‘4.
vided with an inner tubular member.
’I'he object of this invention is to provide a The lengths of the tubes 6 and I0 are preferably
5l êiovel tubular article which has an easily cleaned
~
ore.
The above andvfurther 'objects will be appar
ent by referring to the following description and
the accompanying drawing, in which:
l0. Figure 1 is an elevation of one embodiment of
my invention ;`
l5
-
adjusted, as shown in the drawing, so that the
tube I0 extends beyond both ends of the tube 6.
The tubular article- 4 has been tested and found
to` transfer heatbetween the inner and outer sur
faces thereof with .a minimum- amount of heat
loss.
`
10
l
The drip lip 8 is an important feature of the
,Figure 2 is an enlarged broken elevation of Fig tubular article 4 as any liquids ,poured over the
tubular article y4 tend to ñow orvdrip therefrom.
ure 1; -and
Figure 3 is a section on line III-¿III of Figure , In actual use the tubular articles 4 are adapted
to carry either a hot or a Acold liquid in-the tube
2.
,
A
`
Referring -to the accompanying drawing, the
numeral 4 indicates a. tubular articley which is
adapted to be used in milk coolers, liquid regen
erators and the like. A seamless tube 6, prefer
29 'ably made of stainless steel, comprises the outer
surface of the tubular article 4. Means are pro
» vided for causing‘liquids poured onto the tubular
article 4 to flow or drip therefrom at a given place
in the wall of the tube' 6 'and may comprise a fin
I0 and are .preferably positioned immediately
above or below one another with the drip lips 8
extending downwardly therefrom. ,Y Then. any
liquid which is allowed to flow onto the upper
most one' of the tubular articles 4 ñows over the 20
maximum amount of surface area lof each of the
Itubular articles 4 so that a maximum amount of
. heat can 'be transferred between their inner and
outer surfaces.
,
-While we have shown and described a specific
radially therefrom. The tube '6 is formed in such ~ >embodiment of our invention, it will .be under
25 or rib-like drip 1ip,8 which preferably projects
a manner that the entire wall thereof is distorted
at the drip lip 6 but-the remainder of the wall of
the tube'6 remains round. ' This drip lip is prefer
30 ably formed .by making a fold in. the side wall of
the tube.
-
-
In order to provide a readily and easily cleaned
„ bore for the tubular article L _a tube Ill'is secured
inside the tube 6. The tube i0 is preferably
35 made of stainless steel and is provided with a
smoothlyl polished inside surface. The tube l0 is
as
stood that we do not wishl to be limited exactly
thereto, `since various modifications may be made
without .departing from the scopeyof the inven
tion as defined by the following claim.
We claim'.
~
’
l
"
A tubular unit adapted to be used in a liquid
regenerator, said unit comprising a tube provided v
with a. radially outwardly extending rib-.lillev drip
lip in the wall thereof, said drip lip comprising an 35
outwardly bent portion of said tube extending
within the tube 6 ,and secured thereto by means longitudinally and continuously. thereof, and a Í
of sweating or welding, or by drawing or pressing second tube-securely assembled within the mst
by any- other suitable means so that- the two tubes named tu e sothat the outer surface of said sec-- i
the entire inner 40
l
-io fit tightly tògether and are made integral. The ond tube ontacts substantially
l
outer surface of the tube I0 should’be in intimateV surface of said first named tube.
’
_' ..
„THOMAS A. GRAHAM.
contact with ,substantially all of 'the inner surface
HERBERT W. MOLLISON. ,
of the tube 8. Then, due to the metallic composi
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