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Патент USA US2409866

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Patenteå Óct. 22, 1946
Howard W. J ewell, Los Angeles, Calif,
Appnç?uqn November 80, 1948, serial No. 512,332
6 Claimsë
(Cl. 285¬113)
This invention pertains to improvements in
methods and devices for` joining- Sections of pipe.
The invention is particularly directed to a de
vice for Centering adjacent sections of pipe and
holding the same in position While such pipe sec
tions are permanently joined together. Gener
at the same time Seal the joint; 'such metallicA
forms are often removed after the cement has
set so as to permit re-use of' the forms on other
This invention is directed to a device which
facilitates the laying and centering'of adjacent
ally stated the device comprises a hollow sleeve
having oppositely tapering end sections from a
pipe Sections and assures proper 'spacinglbetween
the Virtually abutting ends of adjacent pipe sec
mid zone of greatest perimeter such sleeve be
tions, The device itself is preferably made of a
ing of a composition adapted to lose strength and 10 'weakly coherent composition adapted to disinte
be removed by liquids passingV through the pipe
grate under the action of liquids so that a smooth
internal bore is presented without any lips or
in which the sleeve is installed.
Pipe lines or conduits for various purposes
other obstructions to the liquids which needs pass
such as, for example, sewer lines, low pressure
through the pipe line or conduit.
water lines, etc., are often made of ceramic pipe. 15 An object of the present invention therefor is
In actual practice it i's' extremely dif?cult to make
to disclose and provide improved methods and
ceramic pipe such as burned- lclay or vitri?ed
means for facilitating the< laying of pipe lines.
clay composition pipe of uniform internal or ex
Another object of the invention is to disclose '
ternal diameter. Variations in composition of
and provide means for facilitating the proper
the clay, the moisture content, and temperature 20 placement of pipe Sections in axial alignrnent.
and time of burning influences the size of the
A further object of the invention is to disclose
?nished- burned- pipe and as a result clay pipe
provide _a device for centering adjacent sec
varies appreciably in diameter. A 4 inch pipe,
tions of pipe and for temporarily holding the
for example, may depart from this dimension
some in position which such pipe Sections are
plusor` minus 1/8 inch. Problems are encountered -N CA J'oíned together.
therefor in laying pipe lines made of ceramic
Further 'objects of the invention as well as the
pipe Sections in that water tight joints are diiii-`
various uses to which the device may be put will
cult to make between adjacent pipe sections be
become apparent to those skilled in the art from
cause of the variations in the diameter of the
following detailed- description of certain eX
abutting pipe Sections.
› 30
emplaryforms in which the invention is embod-`
Moreover it is desired that the pipe Sections
order to facilitate understanding, refer
be in axial alignment so as to present a smooth
ences will be had to the appended drawing in
internal surface or face to the passage of fluid
therethrough. Bell and spigot pipe has been
Figure 1 is an axial section through the end
largely displaced in recent years by plain-end f portion ofa pipe provided with one of the devices
pipe since Stronger joints may be obtained by the
of the present invention said device being partly
use of suitable Ceramic collars enclosing the
broken away.`
abutting plain end pipe. Since most of these
pipe lines are laid upon uneven ground some
Figure 2` ` is an end
shown in Figure 17.
elevation of the device
means must be provided for holding the abut 40 Figure 3 is a sideelevation of a pipe joint made
ting end's of adjacent pipe Sections in alignment
by the use of the device thejoint itself employing
while a joint is formed around such abutting
a collar.
ends. These joints may be made by the use of
any suitable cement. In some instances hy
draulic cement compositions are simply plastered
around the joint; in other instances, due to the
character of the _liquids which are to be passed
through the pipe, 'sulphur-silica cements are em
Figura 4 is an'aaial section taken through a
modified- form of centering and holding device.›`
The device i-l'lustrated` inrl?igures 1, 2 and 3
comprises _a hoilow sleeve ID having the bore IO'
and OPpoŸsitely` tapering end portio s from a mid
zone of greatest periméter.
' i
ployed in asimilar manner. In other instances
It will be noted that the ,outer surface I'l _of
Ceramic collars or ?ttings are slipped around the 50 the Sleeve tapers downwardly towards the end
abutting ends of the pipe and suitable cements
are then poured into the form made by the col
lar. In some instance? metallic,_segmental forms
are placed around a joint and ?lled with cement
and outwardly toward? a miri-section which is
provided` with an outwardly extending circum
ferential-head |21. The head 12 constitutes aystop
which is positioned between the opposit'ely taper
to bond the adjacent pipe sections together and a ingend portions i _I` and `_lit flfhe stop means may
either consist of a circumferential bead |2 or
sleeve Ill, a, collar or outer' sleeve IG' provided
a plurality of circumferentially arranged, spaced
outwardly extending ?anges, beads or lugs.
The oppositely tapering outer surface portions
with a pour hole |1 is moved over the joint and
a suitable cement or sealing compound is poured
into the anmi'lar space between the outer sleeve
not be more than twice its outer diameter.
The sleeve described hereinabove is preferably _
the adjacent pipe Sections, thereby completely
sealing the joint. 'Sleeves of the Character shown
ll and [3 may be provided with tapers on the C1 lt and the outer surface of the pipe through the
pour hole ll so as to ?ll such annular space as
order of 5° although tapers of from 2° to 10° may
well as the space between the a'butting ends of
be employed. The total length of the sleeve need
made of a loosely or weakly coherent composition 10 in my prior Patent No; 2313,074' may be em
ployed. It will be noted that the device of the
capable of disintegrating under the action of
present invention prevents the cement or sealing
liquids which will later iiow through the pipe
compound from leaking into the pipe through
line. The sleeve may be made of a composition ~
openings or spaces between the end surfaces of
including water-reactive or water-soluble con
the adjacent pipe Sections.
stituents. The composition employed should give
Various changes may be made in the contour,
the sleeve sumcient mechanical strength to with- .
shape'land in the proportions of the sleeves. The
stand handling and to permit the ends of the
sleeve to be driven into the ends of pipe Sections; '
For example, as shown
Figure 1 the sleeve Ill
has been inserted into the end portion of the pipe 20
Ill so that the end I? of the pipe abuts the stop
means E2.
The pipe |4 may be a ceramic or
oppositely tapering outer surfaces Il and 13 of
the sleeves may be provided with dimples, beads
or longitudinal extending beads, these various
beads or dimples being capable of assisting in the.¿
centering operation but by reason of 'theøfriable
or disruptive nature of the composition such _.
clay pipe of an uncertain or'varying internal
beads are easily abraded or broken olf in the:
diameter. The outer'tapering surface 13 facili
tates the insertion of the sleeve into the end of 25 event the internal diameter of the pipe is smaller'
than normal.
the pipe. The weakly coherent nature of the
Figure 4 illustrates a modi?cation in whic-hthe-Š
sleeve permits the sleevev to be driven into the
sleeve is provided with outwardly and oplpgisitely` .
end of the pipe M, the material of the sleeve 'being
tapering outer surfaces 2| and 23 anda stop j
either a'braded, partly crushed or deformed or
compressed somewhat in the event the pipe lß 30 means 22. The end portions of the sleeve may be,
is below standard size.
The adjacent section o-f
provided with a plurality of ports or apertures li; ¿
pipe will then be lslipped upon the tapering sur
face ll until the end of such section abuts the
and |9.
Moreover the sleeve may be provided`
with a transverse partition 24; such partition
stop means l2. The sleeve IO will then hold these 4
imparts some added strength to the sleeve and Å
two abutting pipe Sections in alignment with 35 thereby obviates breakage during handling, in- g'
sertion into the pipe end, etc.
their ends suitably spaced lby the stop means |2.
After a pipe line has been laid by the use of the
`It may be noted that the stop means IZ should
devices shown in Figure 4 a volume of water may
not cover the end |5 of the pipe M but simply
act as a means for suitably spacing the ends of 40 be forced through the pipe line and it rWill' be'
found that the various partitio'ns 24 will readily 5
the abutting pipe sections so as to permit some
break thereby facilitating the destruction and re-V
cement to enter between the adjacent ends of the
pipe sections during the cementing or joining
moval of the entire sleeve. The bursting of the .
partitions ordinarily causes the entire sleeve to
A great variety of compositions may be em
crack thus expediting'the rapidV removal o_f the
ployed for the centering and holding sleeves. 45 entire sleeve by the water passing through the
Papier-maché has been used successfully. The
pipe line.
sleeves may be molded from gypsum or composi
Various changes, modi?cations and adaptas
tions of the method and deviceshere and above
e made of unburned clay compositions such as, for O described will readily occur to'those skilled in
example, compositions containing clay and ?bre 5 this art. It is to be understood thatalthough a >
tions containing gypsum. The sleeves lc may be
or elay, gypsum and a water-soluble v''binder.
Water-soluble binders may include salt, sugar or
particular form of joint has been illustratedüin
Figure 3, the invention is not limited vthereto. As v'
previously stated, it is not necessary to employ i
molasses, naphthalene, alum and other relatively
inexpensive water-soluble substances 'capable of 5 the outer sleeve |6 shown in Figure 3 since other
exerting a bonding. effect when dry and of losing 5 ways of 'cementing or sealing the'joints may be _
such bonding effect in the presence of liquids.
Clay moistened with a brine solution may be used
in molding the sleeves. Various gums capable of
swelling in the presence of moisture so as to dis
rupt the sleeve may also be employed. All of
these compositions should be capable of exhibit
ingsuf?cient strength, in the dry state so as to
permit the sleeve to be handled in the manner
All changes and modi?cations coming within 1
the scope of the appended` claims are embraced i
1. Apipe joint comprising
`: two
›` plain end pipe.
described hereinabove, butto dissolve, disinte
Sections of substantially uniform insideßdiam
.eter in axial alignment, a hollow sleeve compriSg-y;l
grate or disrupt in the presence of liquids so that
after the pipe line has been installed these vari
ous devices will be washed away and not inter
liquid having a beaded and thickened midëpor
tion with said bead extending partway- betweenV
mg a material rapidly disintegrable by. action offI
fere or offer resistance to the passage of liquid
andseparating the ends of thepipes'endsphjthe
through completed pipe line.
After the end portions of adjacent pipe sec
sleeve tapered inwardly from the bead tofa :'posi- v_
tion spaced from the inside wall vof the pipe and
tions are held in position by the sleeve a suitable
adapted to entrap liquid between the sleeve and
cement is appliedto the external surface of the
pipe in the region of the joint so as to seal and
pipe wall to promotev distintegration of the sleeve, '‹
and a layer of sealing cement 'surroundingŠ the ,
ends of the pipe 'adjacent the joint and eXtend-,? w
cement such joint. In Figure 3 the two pipe sec
tions M and M' are shown being held by the 75 in'g between the abutted ends of the pipe to a
position initially in contact with the bead on the
2. A pipe joint comprising two plain end pipe
Sections of substantially uniform inside diameter
in axial alignment in making a joint t-herebe
tween, said device comprising a hollow sleeve
composed of a material rapidly disintegrable
by the action of liquid, said device having a
thickened mid portion provided with an out
in axial alignment; a hollow sleeve composed of
papier-mâché disintegrable by action of liquid
and having a beaded and thickened mid portion
wardly extending head, said head being adapted
to extend between abutting ends of pipe sections
With the bead extending part Way between and
in alignment, the ends of the sleeve tapering in
separating the end of the pipes; the ends on the
wardly from the bead to positions spaced from
sleeve tapering inwardly from the bead to a posi lU the inner walls of pipe into which said sleeve
tion spaced from the inside wall of the pipe and
ends may extend to permit liquid to enter be
adapted to entrap liquid between the sleeve and
tween the sieeve ends and pipe wall and promote
pipe wall to promote distintegration of the sleeve;
disintegration of the sleeve after it is installed.
and a layer of sealing cement surrounding the
5. A device of the Character stated in claim 4
ends of the pipe adjacent the joint and extending 15 Wherein the hollow sleeve is composed of papier
between the abutted ends of the pipe to a position
initially in contact with the bead on the sleeve.
6. A device of the character stated in claim 4
3. A pipe joint of the character stated in claim
wherein the hollow sleeve is composed of an un
burned clay-containing composition.
1 wherein the hollow sleeve is composed of an un
burned clay-containing composition.
4. A device for placing plain end pipe. Sections
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