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Патент USA US2105124

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Jamil, 1938.‘
Filed May 7, 1935
2 Sheets-Sheet 1
“TIMH Mil |
W “H ‘
I. w
i an mm
“f / / ’
Jan. 11, 1938;
Filed May 7, 1935
2 Sheets-Sheét 2
I N\ ' E NTUR.
Patented Jan. .1 l, 1938
2,105,1‘24 -
Howard J‘. Little, Fort Thomas,‘ 'Ky., assignor, by
mesne assignments, to The Andrews Steel (to —
pally, a corporation of Delaware
‘Application May "I, 1935, Serial No. 20,224‘ ‘
'1 Claims. " oi. 138-70)
This invention relates to protecting tubes,
pipes, drains, conduits and the like, which. are
constructed usually of metallic or other suitable
materials, and particularly pertains to tubes and
5 the like which are corrugated in' structure and
provided with material applied at the base por
_ tion on the inner wall to provide a substantially
thick lining to protect the bottom wall of the tube
during use and resist the deteriorating abrasive
10 action of ?uids and solids passing therethrough.
It has heretofore been the practice in providing
a compositionlining on the bottom wall of corru
gated tubes and the like to utilize some compo
_ sition material such as asphalt, which-may be
u advantageously applied in a melted condition
Fig. 5 is a perspective view of a protected tub
ing or the like embodying the present invention;
Fig. 6 is a perspective view of another embodi
ment of the preformed insert strip;
' Fig. 7 is a cross-sectional view of a tubing or 5
the like embodying the present invention;
Fig. 8 is a detailed view partly in cross-section
showing the tubing being treated to coat same
‘with a waterproo?ng covering; and
Fig. 9 is a fragmentary section. of a tubing em- 10
bodying the present invention.
Referring to the drawings in which like numer
als are used to‘ designate like parts, numeral i‘
designates a blank strip formed of any suitable
moldahle composition material, typi?ed by a bitu- l5
and permitted to flow‘ to ?ll the valleys between
the corrugations and form a smooth bottom layer minous compound such as asphalt or the like
over the lower portion of the tube and the like. which may be utilized in a pure condition or have
a ?lling of mineral material vegetable ?bers in
This construction is subject to certain disadvan
tages both in the manner of applying the lining corporated therein. The material may be molded
.or otherwise formed, heating it if necessary, into 20
and also in the resulting lined structure.
desired by any suitable method. At’
It is the aim of the present invention to pro _thelshape
vide a lining by ?rst preforming'the composition the time of moldingor subsequently thereto the
may be corrugated with any number of
material into preformed strips or slabs and then strip
corrugations 2 on its outer wall, spaced apart
insert these preformed strips or slabs in the tub
intervening recesses 3. The corrugations 2 and
ing and the like, these being preferably inserted "by
recesses 3 correspond to circumfer
after being also arched or otherwise shaped to
conform to the contour of the. tubing. The outer entially disposed corrugations l and recesses 4'
wall or face of the preformed insert strip is disposed on the interior‘wall'of a tubing 5. The
shaped to conform to the contour of the inner preformed strip may beof any desirable thick
but is preferably of su?icient thickness to 30
wall of the tubing and the like, and the inner nessthe
recesses 4' between the corrugations 4
wall or face of the preformed insert strip which ?ll
on the inside wall of the tubing, thereby pro
is that portion to be exposed when the insert is viding
an exposed bottom ?oor or surface on
placed within the tubing is provided with means the preformed
strip which is above the crests of
'8 whereby sediment and other refuse is caused to 'the corrugations.
The strip i, except for the cor- 35
i be removed from the tubes and the like by the
‘water ?owing through same.
' rugations 2 and recesses 3, may be of uniform
throughout its entire , length and
“For a better understanding of the invention thickness
a substantially, even
reference may be made to the accompanying smooth surfaceproviding
on its exposed face within the
‘ ,, g, drawings in which
or the exposed face may preferably be- 40
Fig. l is a top plan view of a preformed strip, ‘tubing,
with a series of longitudinally disposed
. preferably arched and preshaped, embodying the ' corrugations
6 alternatingly disposed with inter
invention, and adapted ' to be inserted within vening recesses ‘I. It has been found that in a
tubes and the like for lining the bottom wall structure
of this character that dirt, sediment and
A thereof;
material is directedinto the re- 45
" ‘ Fig. 2 is a top plan view of the strip in Figure
cesses 'l and to the bottoms thereof where the
1 after it has been provided with a corrugated full
force of the liquid ?owing through the tub
interior and exterior wall surface, and preferably
arched in conformity with the curvature of the ing is directed against the sediment and foreign
materials to remove samefrom the tubing and
u‘, tube and the like;
Fig. 3 is a side eievational view of the precor
rugated preformed strip of Fig: 2 with a part
broken away;
, Fig. 4 is a fragmentary cross-sectional view
V through the tubing and preformed strip;
' prevent it from collecting and building up in the 50
bottom of the tubing. By having the corruga
' tions 6 and the recesses ‘i. longitudinally disposed
in parallel relation several separate and distinct
valleys are provided and these are advantageous
in breaking up the sediment and foreign material
and also in preventing building up of same into
deposits rather than being subjected to the full
force of the water flow. It will be understood,
and recesses l’ in order to correspond with com
plementary corrugations and recesses of the tub
ing. on the exposed side of the preformed insert
up the sediment, the invention is not limited to
any number of corrugations and recesses,- but it
is within the scope of the invention to corrugate
5, they are in non-parallel arrangement, and
arranged to provide a series of valleys converg
ing at a lower level to provide a substantially
common main channel along the lowest level of 19
the exposed side of the preformed insert which
is inserted in the tubing. Accordingly all water
is caused to flow from a higher level to the main
channel which is at a lower level, thereby caus
ing the foreign material and sediment to'be forced 15
into the lower channel where it is more effectively
removed from the tubing.
From the above description the construction
of a pipe coated and provided with a preformed
insert will be readily understood but it may be 20
stated generally that by way ‘of resume that a
blank of composition material is ?rst formed or
cut from a larger sheet into desired dimension
and is arched to,conform to the curvature of
the tubing. One side is provided with exterior 25
spaced corrugations 8' and recesses 'I' are pro
however, that while several recesses and corru ‘vided longitudinally, but rather than being in
gations are believed more effective in breaking parallel arrangement as shown in Figures 2 and
the exposed surface of the strip with one or more
10 corrugations and recesses for directing the water
against the sediment for removing same.
A preformed strip is ?rst made into suitable
size and is at the same time or thereafter shaped '
to the contour of the tubing in which it is to be
Then when inserted
within the tubing the corrugated wall of the pre
formed strip ?ts in place with the annular dis
posed corrugations ‘ on the inside wall of the
tubing ?tted within the recesses l ‘on the wall
15 inserted and corrugated.
20 of the preformed strip and corrugations {on
the strip ?tted within recesses l' in the tubing.
Heat is applied from any source, typified by a
blow torch 8, with the ?ame 9 applied against
the wall of the tubing, thereby causing to melt
25 that portion of the strip which is in contact with
the interior wall of the tubing and bonding the
preformedv insert strip adhesively with the inte
rior wall of the tubing. Before or after the pre
formed strip is inserted in place within the tub
30 ing, the tubing may be advantageously coated
on the inside wall with a coating layer it and on
the outside wall with a coating layer II. This
inside and outside coating may be applied in any
suitable way. One manner of applying the coat
35 ings is illustrated in Figure 8 in which a supply of
asphalt or other waterproo?ng material may be
lique?ed in the container l2 by means of a heat
ing device IS. The tubing may be supported in
any suitable way for immersion in the container
40 for receiving the coating material. One support
ing device is typified by a spider i3 provided with
arms I‘ disposed to contact with the ends of the
tubing. One spider is supported on a stub shaft
l5 journaled in an arm IS. The stub shaft I5
is also slidably mounted on the arm with a spring
I‘! thereon interposed between a shoulder It on
the spider l3 and the arm, thereby permitting
one spider to be spaced from the other spider for
accommodating tubing of various lengths. The
50 other spider is of the same construction and is
mounted on a stub shaft I9 journaled in arm 20
and adapted to be driven by a drive wheel 2|
actuated from any power source. The tubing
mounted upon the spiders is immersed a suit
able depth in the liquid waterproo?ng material
within the casing i2 and may be rotated by means
of any suitable driving means associated with
the drive wheel 2i mounted upon one of the man
drels to apply a protective ?lm- coating to the
A protected tubing will
60. inner and outer walls.
be produced having the preformed strip insert
forming one substantiallyythlck wear resisting
section on the inner ‘wall thereof and one pro
tecting layer covering the entire inside wall of‘
65 the metal portion and the preformed insert wear
‘resisting and another protecting layer covering
the entire outer wall of the tubing. Accordingly
all'exposed parts of the tubing are entirely cov
corrugations corresponding with the annulariy
disposed corrugations of the tubing and adapted
to inter?t therewith. At the same time or sub
sequently the longitudinally disposed corruga
tions on the exposed surface may be formed.
These preformed inserts are preferably made, for
convenience of manufacture and handling, in
small sections which are then laid in end to end
relation within the tubing to form a protected
layer throughout the entire length thereof. Also 35
two or more sections of tubing constructed as
above described may be laid in end to end rela
tion and overlapped with the preformed insert
sections of adjacent tubing sections abutting to
form a continuous wear resisting layer through
out the length of the abutting tubing sections.
After the tubing sections have the preformed in
serts placed therein, heat is applied preferably
against the exterior wall of the tubing in order
to slightly soften and melt that portion of the 45
surface of the preformed insert which is in con- .
tact with the interior wall of the tubing in order
to cause same to be adhesively secured. There
after the tubing with the preformed insert ad
hered in place is partially immersed within a
tank ?lled with liquid coating material and ro
tated in order'to apply a thin ?lm. of water
proo?ng over the interior and exterior walls of
the tubing.
The preformed insert sections may or may not 55
be provided with the longitudinally disposed cor
rugations on the exposed surface. If these cor
rugations be provided they may be of any num
ber desired and disposed in any manner to break
up the sediment and cause same to be subjected
to the full force of the liquid ?ow rather than
being separated therefrom. vWhere these longi
tudinally disposed corrugations are used, the
coating ?lm is applied to- the inner wall of the
tubing without impairing them.
While I have described the invention in de
tailifor the purpose of illustration and have de
scribed different embodiments thereof, it will,
of course, be understood there may be various
changes in detail of construction without depart 70
In Figure 6 there is disclosed an embodiment ing from the spirit thereof.
I claim: ‘
of the preformed insert. It is like that embodi
1. A sheet ~metal tubing having a lower-most
ment in Figure 2 arched from a plain strip, such
as in Figure l, and provided on the exterior side section of the interior wall provided 'with a
with circumferentially disposed corrugations 2' moldable plastic material having a longitudinal 75
cred with the waterproo?ng material and pro
tected thereby.
groove formed in the lowermost portion of'the
wear surface thereof.
2. A sheet metal tubing having a lower-most
said lining formed‘ of a waterproof plastic ma
terial in adhesive contact with the tubing and
provided with corrugations on its exposed face
arranged at an angle to intersect the corruga
able plastic material having transverse corru
tions on the inner face of the tubing to form a
gations 'onvone surface conforming to corruga
bottom wear surface provided with corrugations
tions in the tubing and having grooves formed ‘to
prevent. accumulation of foreign material
in the wear surface at an angle to said trans
section of the interior wall provided with a mold
3. A sheet metal tubing having a lower-most
section of the interior wall provided with a pre
formed moldable plastic material, and a weather
protective coating layer applied to cover the seam
between the edges of the preformed material and
15 the adjacent portions of the interior wall.
4.'A .corrugated metal tubing having a lower
I most section of the interior wall provided with
a wear resisting lining of moldable plastic ma
terial which is preformed and shaped to the
thereon. ~
6. A preformed moidable plastic strip having
one face adapted to be softened andbonded to
a tubing and the opposite face provided with a
channel having a longitudinally corrugated bot
tom surface disposed substantially longitudinally
7. An ‘article of manufacture, a preformed
lining strip of thermoplastic composition for cor- 15
rugated tubing having upon one side transverse
corrugations to mate with the corrugations of
curvature of the tubing, and a plurality of spaced , standard tubing and having on the other side
apart and-longitudinally disposed corrugations a non-planar wear surface provided with a lon 20
provided on the exposed face of the lining'for
preventing the accumulation of foreign material.
5. A tubing having an inner face provided with
transverse corrugations, a lining over the lower
portion of the tubing completely covering the said
gitudinal groove in the lowermost portion of the
wear surface, said lining strip being sufficiently
?exible to conform to the interior wall of the
corrugated tubing and of a character to be
bonded thereto by the applicationof heat.
transverse corrugations in the lower portion,
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