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Патент USA US2135103

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Nov. 1, 1938. v
D. B. DlMlcK
Filed Jan. 4, 1938
2 Sheets-Sheet l
Nov. 1, 1938.
D. B. DlMlcK
Filed~ Jan. 4, 1938
2 Sheets-Sheet 2
Patented Nov. 1, 1938
_ __
Danielj ïß.' Dîniick, Newton. Masts. "
' Ápplicatión ¿January .4, 193s, serai No.71s35353
. sonnes."
The present invention relates'toirnprover?ents
in lock-joint subdrainage pipe‘andëhasifor ' an Job;
ject to provide an improvedconnection or »joint
between sections of subdrainage pipe that will
5.; act to hold the sections of pipe together against
any likelihood of separation, while at the same
Atime allowing of a certain flexibility between the
pipe sections incident tothe uneven settlingl of
the ground, abnormal' localized superimposed
10I Weights and other causes. f ` -
The invention also contemplates the provisionY
(C1. «s1-_11)
¿Figure 9 is a sinmar‘view from thefs'pigot end.
-FigurelO is a vertical section, taken onan en
larged scale, on the line III-IU 'in` FigureA 7';
Figurevll is an" enlarged verticalsection 0i the
joint shown vin Figure _7 and illustrating the ra
dius of curvatureand radius of'irelative movement'
Í ofthe ñexible connectedïfsections.
Referringfmoreparticularly to Figures '1 ’to '5,
` A and B represent twoïadjoining sections ofA sub
drainage pipe _constructed ¿in ï accordancel with
of an improved joint in Which-the items offsim
the present',~ invention inmetal,` clay or `other ap
plicity and economy in manufacture are taken. propriate'material. These sections may beV each
largely into account,y togetheíjwithïthe further
cin'nposedl cfa semi-circular `.or rother form-of
feature that the pipe _sections may be assembled _wall I'2v`between the upper portions ‘of which is
and locked together easilyand quick‘lyïin _trenches supported a- cradle -orr top »wall I3. " The Vcradle
orY other places where clearancefandj operating ' preferably slopes frontend to end of "its pipe secf
room are limited.
l" f
A further object of the'invention is to provide
20 both internal and 'external` locking devices for
the pipe sections, neitherf-'o'f which interfere with
one another in the adjustment of ïeach'pipe sec
tion due to locking conditions, and both‘ of which
contribute jointly to the single purposeof secur-"
ing the pipe sections together. againstv separation
tion whereby the vlower end of one cradle "will
extend vertically beneath the adjacentV higher end
of the i cradlegof; the> adjacent section, y thus“ pr'o-`
ducing lan elongated slot or gap I4 leading'from>
the upper-surface vof the cradle ISof a higher'pipeA
sectiofn‘rB throl'igh` the slot intotheinterior of the
next lower forîcarry-oi’fïsection` A. ' _
As shown in-'Fig'ure 3, the water which `settles
upon the cradle I3 of section-B descends through
` in such a snugly set-up relation as to avoid- leak-l
age at the points.
«gap or slot I4 in a cascade eiïect downwardly into - »
, With the 'foregoing and other objects in view,` the interior fof 'the Apipe section A. thus‘stirring
the invention will be more fully described herein i up"the fluid material in the subdrainagepípe and
after, and will be more partîcularlypointe'dfout in having.»ajself-clearingaction so as to vavoid the'
the claims appended hereto.v
' . .»
stoppingï-up of the ¿slot I4. '
In the drawingsywherein Vlike symbols refer to
»like or corresponding parts throughout thesev
Figure 1 is a fragmentary .perspective View
V‘The'bell end of "the pipe'A is'indicated atV I5,
while at' I6 is shown’fthe‘spigotend of the pipev
section B. Í‘Pads-Il andïI'81 are cast or otherwise ’
produced uponthe bell and spigot, VThese pads
showing an improved lock-joint subdrainage pipe ‘ will extend preferably in> a circumferential direc
constructed according‘to the present invention. tion _about one-third the normal diameter of the
-Figure 2 is a side View, withparts broken away pipe,y although this is‘not essential. ¿The pad Ilv
and parts shown in‘sectionfwith thepipe sec
40 ltions disassembled.
Figure 3 is a longitudinal vertical sectional
View taken on the line 3-3 in Figure 1 and with
Inside the pad is formed thereby a depression i9
into which ther complementalfpad I8 of the bell
I6 ñts as'indi'catedin Figure 3. In separated po
parts assembled.
sition the parts are shown in Figure 2. The pads
Figure 4is a side view, with parts broken Vaway ’ I‘I.1and 'I8 ‘constitute the internal flocking device. `
45 _ and parts shown in section of Atwo sections of pipe
VThe external'locking device is composed of ears
joined together by the improved joint and indi-` and clips which cooperate vto hold the spigot I6
_down in the bell I5, and prevent the pad» I8 fromV
Figureä is a vertical transverse'section taken lifting and»> clearing vover the pad I'I, ‘such -asY
on the line 5-5 in Figure 3.>
would benecessary'toîseparate the ends of the
cating the flexible character thereof.` '
50 _ > Figure 6 is a top plan View of- aslightly modi
ified form of the invention-
Figure '7 is a longitudinal vertical section taken
on the line 'I-'I in Figure 6.:
Figure 8 is an end ViewV as seen
¿l end of one .of thepipe sections. Y;
Vfrom Ithe bell l'
pipe sections. ï The ears are indicated at I 9V' and
>they taper from one end tothe other. " These
ears are -upon the outside upper portions ofy the '
bell-I5, being »two in number and located at sub-5A
stantially». diametrically opposite »points near: the _'
upper partof the pipe. As best shown in'y Figure 51,',
the ears I9 have lower incurved surfaces 20 to
be able to move together on the line of curvature
iform sliding interlocking connection with the
between the parts I9a and |91’. This might be
lower jaws 2| of the malleable clips 22. The ears
I9' or the incurved lower surfacesv 20 thereof, are
tapering from end to end. That is the ears pro
gress in thickness from one end to the other.
styled the` lobe curve, the center of which is at C .
'I'his condition is shown in Figure 2 in which the
smaller dimension of the’ears is shown to the
right and the larger dimension at the inner end
10 of the bell I5. Thus when the malleable clips v22
are driven onto the ears, a binding effect is cre
' ated due to the wedge action produced by the ears
and the clips. This wedge action causes the other
jaws 23 of the clips 22 to press down upon the
15 upper edges or curbings 24 of the spigot I6 thus
holding the pad I8 down in the socket or depres
sion I9 and behind the companion pad I1. In
other words, the inner surface 20 is higher at one
end than it is at the other. The highery end is
20 at the free end of the bell I5. The same result
could be produced of course if thetaper was upon
the claw or jaw 2l of the clip 2,2. The _upper claw
or jawV 23 rides within an opstanding rib 25 on the
bell. This rib 25 guides the clip and in conjunc
25 tion with the ear I9', which from Figure 5»wi1l
and the radius line being indicated at R. This
radius R should be constant throughout the
curved surfaces at I9EL and IBb. In other words,
the curvature between the meeting surfaces of
parts I9ß and I9b should be struck from the com
mon center C. Thus the pipe sections can shift
withrespect to one anotherV inthemanner indi 10
Icated in Figure4. In 'other words, the pipe sec
tions are in this sense said to be flexible 'at the
Now it will be noted from Figure 10 that the
'concave and convex parts |98L and I!)b extend up 15
and around from the bottom of the pipe only
about half way. In other words, these interñtting
parts Ißeand I9b do not go all the way up on
bothsides of the pipe section. 'I‘he center C
' at the spigot end acts as a fulcrum and the pipe 20
tends to sag downward, creating a sliding move
Vment at the arrow point, preventing a swivel
effect without breaking loose at theY joint.
In the form shown in'Figure 6, the taper 2l)a
is shown upon the outside lateral or horizontal
"-‘be shown to extend outwardly'andl downwardly
surface of the ear I9'. This will have a tendency
from the Vside of the bell, coacts to bind lthe jaws
of the clip 22 in place lupon the joint. The »clip
22 may be slid horizontally from lthe higher or
narrower end_of the ear I9fand driven by ham
to wedge and lockthe clip inplace but it will
not have the'effect to force vertically downward
the ,jaw` 23 upon the spigot. The preferred con
struction- is shown in Figures l to 5 in which this
vertically downward movement is the result of
the wedge action. LThe vertically downward
Vmovement binds the pad I8 of the spigot into
the recess I9 and back- of the bell pad I1.
In' Figures; 6 -to 11,1 it’ is assumed that a proper
. 30,
" mer blows ’towardsV thel other thicker orlower
end. In other words the -hammenblows will act
to wedge the clip 22 upon the ear I9’ and upon
the rib 25 and the curbing 24 of-,ther spigotv I6.
35 The same result could be` securedL by having the
inclination or wedge formationon clip122. The
malleability of the clip 22 enables the same to be
forced onto the cast iron pipe joint without likeli
hood of danger of breakage to either-3»` _Moreover,
40.' such a clip will possess a certain amountlof elas;k
ticity which will enable the partsëtoA-be. put under»
interñtting relation already obtains between parts
lee andalßl? beforeputting the clips in place.`
45 tion with respect to another which is owing tothe
struction and design rof the' above specifically
described embodiment 'of this invention without
Therefore, anybinding action ofthe clips, even
an outward horizon’tali'binding action, will suffice
as the clips will athenholdfthe spigot-_end'fromv 40
lifting out ofthe previously Aengaged-position
great pressure _and tension. fI‘herebyapositive of the interñtting ,parts ,|85A and AI9b . `
~It is obvious that various changes and modi
lock is produced for- the joint Without,- however,
interfering with `the. deflection `of¿_-_one pipe‘sec-_ ñcations may be made in the details -of con
>use of the malleable iron clips.l
At the same time the joint> possesses arcertain
rigidity that will prevent thecasual» or> accidental
separation vof the pipe sectionsand çwill avoid.
departing from the spirit thereof, such changesv
and modifications ‘being restricted only byv the
scope of Vthe following claims:
leakage. » The malleable iron clip may be put in
What-»iis claimed is:
1. A'subdrainage half-round pipe comprising
a vise and adjusted as by opening or closing the
jaws 2| and 23 thereof to greater or> lesser extent, adjoining pipe sections with.V interñtting half
whereby the clips are madeto _conform to. the bell-and spigot, ksaid pipe sectionshaving- sub
deflection in the vpipe sections Awhichuthey act to stantially semi-circular bottom walls 'and hat
top f cradles, interñttingä parts >on `>the Voverlapping
couple together.
-) l
The requirement of> such ¿a lockïjoint feature half bell and-spigot, -ears lon the outside of the:
is due to the fact that in railroadworkbefore half bell, ribs upstanding from said half bell, and
the construction has consolidated theremay be al malleable clips slidably‘ engaged upon said ears
movement of the materialwhich` causes -„:aïcon-_- and over said ribs and having claws, one claw
centrated load on the pipe tending 'tocauselitztoi engaging beneath the ear, the other claw engag 60
separate. The lock-joint will_hold thesections ing uponthe upper side .of the semiecircular wall
together. At the same time it isrvery desirable to and within said rib, said clip and earhaving
have a lock-joint which will yield «rather than one
which is wholly rigid. The valueof the construc
wedge surfaces therebetween.4
2. In alsubdrainag'e :pipe composed. .of a plu
rality of. pipe sections, each section being _com et?
tion consists in the fact ,that itfis ¿positivi-:fin lock
ing the pipe together butpconstructedso that the~ posed of a substantially semi-cylindrical bottom?
joint will yield ordeflectjunder pressure, ,1 The; wall and a substantially flatV top wall sloping
arrangement of theinternal and external locking ' from end to end of the pipe section, said pipe
sections having upstanding curbings at `the lower
ends of ¿said topwalls, said‘pipe sections having
the same construction isillustratedwith‘the ex-` half bell portions projecting from the higher ends
ception that the pads- I'I and _I8 are replacedpby a'> of the top walls for enveloping the deep curbings
devices gives a remarkablyyfleiçiblgeJoint.. j 1_’ .
Referring more particularly tQ-'Fígul‘esî‘fì to
sunken ordepressed area ISeofztheibelI and a of the half spigot ends of thezadjacent pipe sec
convex for 4raised portion ISP .on .tl'1e;`s`pigot„> .'.In‘ tions, said half. bellslhaving’ribs projecting up-V
75 order to' obtain ñexibilítmthe. twoisectionsshouldf Vwardly therefrom outwardly ’ofthe deep curbings`
of the half spigot ends, projections on the outer
parts of 'the half bell ends, and slidable means
cooperating with said projections and having
wedge surfaces therebetween, said means having
section by movement of the pipe sections at right
angles to one another, said half bell and spigot
jaws guided by said ribs and slidably engaging
and withdrawn in the same manner, ribs on the
upon the upper surfaces of said deep curbings.
3. In a subdrainage pipe composed of a number
of similar pipe sections, each said section com
posed generally of a substantially semi-cylindri
10 cal bottom wall and a fiat top wall sloping from end
to end of the section, each section having a half
spigot end and a half bell end for receiving the
half spigot end of an adjacent pipe section, said
pipe sections having curbings extending above
15 the ñat top wall, said flat top walls forming gaps
therebetween at the assembled half bell and
spigot ends of two adjacent pipe sections, ribs
upstanding from the half bell ends outwardly
of said curbings and upwardly above the curb
20 ings, projections on the outer substantially di
ametrically opposite portions of the half bell ends,
and malleable means slidably mounted with re
spect to said projections, said projections and
malleable means having wedge surfaces there
25 between, said malleable means having jaws ex
tending within and guided by said ribs and slid
able directly in contact with said curbings.l
4. In a subdrainage pipe composed of a plu
rality of pipe sections, each such pipe section
30 including a substantially semi-circular bottom
wall and a sloping top wall with curbings up
standing above said top wall, said pipe sections
having half spigot and half bell> ends for fitting
together to join two adjacent pipe sections to
ends having internal Iinterlocking parts inter
?ltted by said right angular rectilinear movement
5. In a subdrainage pipe composed of pipe sec
tions of substantially semi-cylindrical form hav
ing cradle top walls for collecting drainage water,
said top Walls having gaps therebetween at the
meeting portions of said pipe sections to permit
the infiltration of the _drainage water into the 20
interior of the pipe, said pipe sections having
interlocking portions at the meeting parts of the
pipe sections, said interlocking portions having a
limited relative movement in a direction axially
of the pipe sections for permitting of the angular
adjusting tilting movement of one pipe section
with respect to another, and means for detach
ably binding said interlocking portions in the
interlocking relation, said means being in sub~
stantial alignment with said interlocking por 30
tions in a direction transversely'of the pipe
whereby said means will not interfere with the
rocking or tilting movement of one pipe section
with reference to another.
35 gether, the half spigot end of one pipe section
ñtting into the half bell end of an adjacent pipe
free ends of the half bell portions extending
Vupwardly beyond said curbings, projections on
the half bell portions just below said ribs, and
malleable clips slidably and interlockably en
gaged with said projections, said projections and 10
clips having wedge surfaces therebetween, said
clips also having jaws riding within and guided
by said ribs and slidable in contact with said
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