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Патент USA US2408134

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F._W.ABEL
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42,408,133.
Ü 'PAVEMENT SLAB coNNEçTING MEANS
Filed May 16, 1945 .
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Sept 24, 1946..
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F. w. ABEL
‘ 2,408,133
PAVEMENT SLAB CONNECTING MEANS
>Filed May 16, 1945
_
2v Sheets-Sheet, 2
Patented Sept. 24, 1946
` 2,408,133
‘Y UNITED STATES> PATENT OFFICE
.alioalaa` `
PAVEMENT SLAB CONNECTING MEANS
n Franklin W. Abel, Franklin, Ind.
'
Application May'16, 1945, Serial No. 593,997
'
A8 claims. (C1. 94-8)
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,
This invention relates to pavements and par
ticularly to that type of pavement formed from
2
individual, precast slabs'one interconnected with
them. Each slabI-Il vis made to have sides- and
edges at right angles to each other `so that they
may be laid one'after another to have sides Vand
another t0 secure what I term controlled rigidity
ends vbrcught respectively adjacent each other,
throughout the entire pavement and particularly 5 Veither in a staggered relation or as indicated in
in respect to the interconnecting means between
Fig. 1, in aligned, cornering relation. _It is de
adjacent slabs. An important advantage of the
sired that the slabs be spaced apart a sufñcient
invention is that the slabs may be vformed at a
central plant or >station and then taken to vthe
site of the roadway and placed in position upon
a sub-base, one slab after another, and those
slabs interconnected to provide va continuous
distance, as indicated in Fig. 1, to permit inser
tion therebetween of a waterproof sealing strip
l I, Aserving also as a compressible joint under ex
pansion of theyslabs.
'
»
Each slab I0 is provided with one or more wells .
paved roadway with meansholding the slabs at
I2 along predetermined sides and ends, the well
a common level or with their sides in thegrade
being herein shownV as a rectangular recess enter
required, al1 in such a manner‘that the slabs can- f ' ing from the edge and being cut entirely vertically
not work apartone from the _other or cneyslab'y
through vthe slab. In the end 0f the well I2,
raise 0r lower in respect to the other.
,
.
within a recess I3 is mounted the base I4 of a
Another advantage of the invention is found
T iron to have a tongue VI5 extend horizontally
therefrom. lThe base I2 is anchored to the slab
in the fact that where the occasion arises to open
up the roadway to make sewer connections, re
It ¿by means of two cap screws I6 and Il passing '
pairs, gas or water main connections, and the
through the base I4 on each side of the `tongue I5
and screw-threadedly engaging within a frusto
conical lead sleeve I3 in each instance that has
been positioned within‘the slab at the time it was
like, no pavement has to be chopped through and
then have va hole refilled either leaving a depres
sion or a raised portion as customarily occurs.
Instead, all that is necessary is to disconnect one 25 formed, this particular construction forming .the
slab from its adjacent slabs, and then lift that
subject matter of my United States Letters Patent
slab vertically upwardly and shift it horizontally
No. 2,396,803, issued Manch 19,1946. In any
from over the location where the excavation has
event, the recess I3 is sulîiciently deep as to re
to be made. Then following the completion of
ceive entirely therewithin the headsof the vcap
the work rand the reñlling of the excavation, the
screws I6~a_nd I'l.v
‘
slab may be shifted back over the original setting
Now in the next adjacent slab I0, Fig. v2, being
and lowered between the other slabs or alongside
the slab shown on the left hand side, there is
thereof as the case may be and then reconnected
likewise affixed thereto the lbase 1I9 within the
so 'that the vsmooth surface of the roadway is
recess 20 of theslab by the two cap screws 2| >and
again had.
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These and other important objects and ,advan
35
22 screw-threadedly-engaging inthe lead, frusto
conical sleeves-23 and 24 embedded within the
tages of the invention will become apparent to
slab. From this base I9 extends the tongue 25
those informed in road paving in the following v >at the 4same level as ¿that of »thetongue I5. YWhen
description of one particular form ofthe inven
the tv'vo` adjacent slabslû are positioned on their
tion as illustrated in the accompanying drawings, , 40 sub-base 26; Fig. 2, 4and ‘brought one toward the
in which
other into their properly alignedlpositions to have
'
Fig. 1 is a View in top plan of a fragmentary
portion of a roadway embodying my invention ;_
Fig. 2, a vertical longitudinal section'on the
` line 2-2 in Fig. 1;
'
Fig. 3, a transverse vertical section `on the line
3-3 in'Fig. 1; and
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Fig. 4,»a top plan View on an enlargedscale of
the usual' strip Il therebetween as above indi
cated, 'there will be a'sli-ght space left between
the ends of these >opposing tongues I5 and 25.
The tongue I5 is provided With a hole 26 verti
cally-therethrough, and >the tongue 25 is similarly
provided -witha hole 2l vertically therethrough, l
these holes> being located in- th‘ose portions of the
one of theslab interconnecting means within a
tongues'which-project beyond their respective
,50
well and with the cover removed.
rLike characters of reference indicate like parts
throughout the several views in the drawings.
Reference is made to my copending application
for United States Letters Patent, Serial Number
inner wall of the well `I2 >and the edge of-the
adjacent >slab I5. ' Aconnector plate 2'8 is placed
over-fthe two tongues I5 and 25 with an inter
vening fibrous str-ip ‘-2S,„prefer_ably treated with
some ‘waterproofing compoundfsuch as an as
556,363, of which this application is a' continua-¿_5,5 phalticpreparation. Then- the bolts 3l) and 3l
tion in part.
’
are :passed’down through holes ‘provided in the
plate ¿28 andr thel strip u29 t-hereundergto extend
>As indicated in- Fig. 1„the roadway is built up
.by laying one after another slabs I0 _of any de
on through‘the tongue holes 26 and 21. Brought
sired area, depending upon the rnature of the
up against the undersides of the .tongues -I-_Sand _
roadway, and the ability to lift and, -transport.¿ co 25 is another istrip >32, preferably ofiibrous na
2,408,133
3
ture and waterproofed, and under this strip 32
is a connecting plate 33 through which the bolts
3D and SI pass to receive their nuts 34 and 35.
Since the tongues I5 and Iii are much less in
width than that of the Well I2, the nuts maybe
positioned on the bolts by reaching down along
side and under those tongues. These nuts may '
then be suitably drawn up to pull the two plates
28 and 33 compressibly toward the tongues I5 and "
25 therebetween.
.
4
plate so as to prevent its horizontal shifting from
the slab.
In the form h'erein shown, these bolts 4I and
42 have counter-sunk heads so that they do not
project above the top face of the plate 43. The
thickness of the Wood block 3B may be made
to have the plate 40 pulled compressibly there
against by the time the plate 40 is pulled down
into the recesses 38 and 39 so that the plate is
not only supported around its marginal edge por
tions, but, is also centrally supported over the
It is to be particularly noted, as indicated in
tongues I5 and 25 through the block 36. As
Fig. 2, that the diameters of the bolts 34 andV 35
above indicated, the slabs I0 are formed with
are considerably less than the diameters of the
these wells I2 regularly arranged to receive
holes 26 and 21 so that'there may be permitted
longitudinal shifting of -one tongue I5 in respect 15 therein the tongues 25 ofthe adjacent slabs.
While I have herein shown and described my
to the other tongue 25 between the connecting
invention in the one particular form, it is ob
plates 28 and 33 without any appreciable vertical
vious that structural variations may be employed,
shifting, the longitudinal shifting being possibly
all without departing from the spirit of the in
set up by expansion and contraction of the slabs.
vention, and I therefore do notdesire to be lim
The separating strips 29 and 32 are provided to
ited to that precise form beyond the limitations
prevent freezing together of the connecting mem
as may be imposed by the following claims.
bers 28 and 33 with the tongues I5 and 25 so
I claim:
that slippage may be permitted as the occasion
demands.
It is further to be noted that where the slabs
vare to be laid upon a non-level base, one slab
may be tilted upwardly or downwardly from the
1. A longitudinally yielding, vertically ñxed
connector of pavement slabs, comprising a pair
of tongues each carried by a slab; a base on each
tongue rigidly securing it to its respective slab
to have the tongue extend therefrom in longitu
other slab and still be interconnected simply by
dinal alignment with the other tongue between
positioning the connecting plates 28 and 33 as
the top and bottomfaces of the slabs; a plate
before, and then pulling them down and up re 30 overlapping said tongues; bolts extending through
spectively against the intervening tongues I5 and
said plate and said tongues to maintain vertical
25 (the non-freeze strips being also employed)
alignment of said tongues, said bolts fitting
so that the plates may either bend or the tongues
through
said plate and tongues with lost motion
may bend to the angle of inclination between
the two slabs, all without eliminating the longi 35 to permit limited longitudinal travel of one
tongue in respect to the other; and means inter
tudinally shiftable feature.
posed between said plate and tongues to maintain
The well I2 has the lower portion thereof ñlled
slidable surfaces therebetween; one of _said slabs
in any suitable manner, such' as by a weak mix
at least being provided with a well into which
ture of sand and cement 54, the level of this
the opposing ends of said tongues extend; a well
40
mixture being brought up at least to the under
cover seated over said tongues; cover anchor
sides of the tongues I5 and 25. Then the upper
means Within said well and fixed to the slab
portion o-f the well is closed over, first by drop
thereof; and means interengaging said cover and
ping a rectangular Wood block 33 into the well
said anchor means.
and placing a strip of asphalted paper 55 there
2. A longitudinally yielding, vertically fixed
around to leave an upper groove 3l between the 45 connector of pavement slabs, comprising a pair
block and the adjacent slab wall wherein a water
of tongues each carried by a slab; a base on each
proofed compound may be poured to complete
tonguerigidly securing it to its respective slab
the seal. This block 36 is preferably made out
to have the tongue extend therefrom in longitu
of a decay resisting material, such as oak. The
dinal
alignment »with the other tongue between
50
underside of the block 36 is notched out as indi
the
top
and bottom'faces of the slabs; a plate
cated in Fig. 2 to permit that underface of the
overlapping said tongues; bolts extending
block to rest upon the connector plate 28. The
through said plate and said tongues to maintain
upper face of the block 36 is at an elevation be
vertical alignment of said tongues, said bolts
low the faces of the adjacent slabs Iû. The
upper edge portion of the slab IO extending 55 fitting through said plate and tongues with lost
motion to permit limited longitudinal travel of
around the well I2 is _recessed to leave a shoul
one tongue in respect to the` other; and means
_der 38 therearound.v Then across the edge por
interposed
between said plate and tongues to
tion of the next adjacent `slab I0 there is also
maintain slidable surfaces therebetween; one of
provided a recess 39.
I
A metal plate 40 is formed to rest within the 60 said slabs at least being provided with a well
into which the opposing ends of Asaid tongues ex
recesses so provided to have its upper face in the
tend; a Well cover seated over said tongues; cover
plane of the top faces of the adjacent slabs ISI.
anchor means within said well and fixed to the
To secure this plate 43 in place, I pass a pair of
slab thereof; and means interengaging said cover
bolts 4I and 42 down through the plate 4B,
through the block 35, to have theirlower ends 65 and said anchor means; said cover being in two
parts, one p-art being an upperfpavement face
screw-.threadedly engage in nuts _53 welded to
member, and the other part a resilient support
anchor plates 43 and 44 respectively extending
member; said support member being carried over
from the lopposing side Walls of the well I2.
said tongues to be supported therefrom.
These anchor plates 43k and 44 arepositioned
3. A longitudinally yielding, vertically fixed
Within the slab I0 at th‘e time it is being formed, 70
rconnector
of pavement slabs, comprising a pair
and in the present showing consists simply of
of tongues each carried’by a slab; a base on each
rectangular members having some sort of a foot
tongue rigidly securing, it to its respective slab
packed within the mass of 'concrete'of the slab,
to have the tongue extend therefrom in longitu- «
the feet in each instance being herein shown sim
dinal alignment with the other tongue between
ply as a pin 45 extending vertically through the
2,408,133
5
the top and bottom faces of the slabs; a plate
overlapping said tongues; bolts extending
through said plate and said tongues to maintain
vertical alignment of said tongues, said bolts
fitting through said plaire and tongues with lost
motion to permit limited ‘longitudinal travel of
one tongue in respect to the other; and means
interposed between said plate and tongues to
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being located to be in substantial vertical and
longitudinal alignment, one tongue on one slab
with an opposing tongue on a next adjacent slab;
connector plates overlapping each opposing pair
of tongues; bolts clamping together said plates
and said tongues to. maintain said vertical align
ment; said bolts fitting through said plates and
maintain slidable surfaces therebetween; one of
said slabs at least being provided with a well into
tongues to have lost motion sufficient to permit
limited relative longitudinal travel between the
tongues in each pair thereof; said slabs being
which the opposing ends of said tongues extend;
formed to have a well therebetween open from
a well cover seated over said tongues; cover an
chor means within said well and fixed to the slab
thereof; and means interengaging said cover and
said anchor means; said anchor means compris
the top and into which said pair of tongues ex
tend to permit manipulation of said bolts; a cover
for said well; cover anchor means carried within
the well; and bolt means interengaging said cover
ing opposing bars extending from opposite faces
and said anchor means; a foot on each of said
of said well to have said tongues directed in
tongues; the vertical opposing faces of said well
spaced relation therebetween; and said interen
each being formed tothave a tongue foot receiving
gaging means comprising bolts operable from the
recess therein; and bolt means operable from
top side of said cover and screw-threadedly en 20 within said well for rigidly securing said feet to
gaging said bars.
~
4. A longitudinally yielding, vertically fixed
connector of pavement slabs, comprising a pair
said faces.
.
,
7. A pavement comprising a plurality of indi
vidual, preformed slabs; tongues fixed vto said
of tongues each carried by a, slab; a base> on each
slabs to extend from edge faces, said tongues
tongue rigidly securing it to its respective slab 25 being located to be in substantial vertical and
' to have the tongue extend therefrom in longitu
dinal alignment with the other tongue between
the top and bottom faces of the slabs; a plate
longitudinal alignment, one tongue on one slab
with an opposing tongue on a next adjacent
slab; connector plates overlapping each opposing
`pair of tongues; bolts clamping together said
through said plate and said tongues to maintain 30 plates and said tongues to maintain said vertical
vertical alignment of said tongues, saidV bolts
alignment; said bolts fitting through said plates
fitting through said plate and tongues with lost
and tongues to have lost motionsufiîcient to per
motion to permit limited longitudinal travel of
mit limited relative longitudinal travel between
overlapping
said
tongues;
bolts
extending
one tongue in respect to the other; and means
_ the tongues in each pair thereof; said slabs being
interposed between said plate and tongues to 35 formed to have a well therebetween open from
maintain slidable surfaces therebetween; one of
the top Yand into which said pair of tongues ex
said slabs at least being provided with a well into
which the opposing ends of said tongues extend;
tend to permit manipulation of said bolts; a cover
for said well; ‘ cover anchor means carried within
a well cover seated over said tongues; cover an
the well; and bolt means interengaging said cover
chor means within said well and fixed to the slab 40 and said anchor means; said cover being in two
thereof; and means interengaging said cover and
parts, one comprising a pavement surface mem
said anchor means; said anchor means compris
ber, and the other a resilient surface member
ing opposing bars extending from opposite faces
backing shaped to be carried by said tongues.
of said well to have said tongues directed in
8. A pavement comprising a plurality of indi
spaced relation therebetween; and said interen 45 vidual, preformed slabs; tongues fixed to said
gaging means comprising bolts operable from the
top side of said cover and screw-threadedly en
gaging said bars; the underside of said cover be
ing formed to resty on said plate.
5. A pavement comprising a plurality of indi
» slabs to extend from edge faces, said tongues
being located to be in substantial vertical and
longitudinal alignment, one tongue on one slab
with an opposing tongue on a nextadjacent slab;
connector plates overlapping each opposing pair
of tongues; bolts clamping together said plates
and said tongues to maintain said vertical align
located to bein substantial vertical and longi
ment; said bolts fitting through said plates and
tudinal alignment, one tongue on one slab with
tongues to have lost motion sufficient to permit
an opposing tongue on a next adjacent slab; con 55 limited relative longitudinal travel between the
nector plates overlapping each opposing pair of
tongues in each pair thereof; said slabs being
tongues; bolts clamping together said plates and
formed
to have a well therebetween open from
said tongues to maintain said vertical alignment;
the top and into which said pair of tongues ex
said bolts fitting through said plates and tongues
tend to permit manipulation of said bolts; a
to have lostmotion sufficient to permit limited 60 cover for said well; cover anchor means carried
relative longitudinal travel between the tongues
within the well; rand bolt means interengaging
in each pair thereof; said slabs being formed to ' said cover and said anchor means; said-cover
vidual, preformed slabs; tongues fixed to said
slabs to extend from edge faces, said tongues being
have a well therebetween open from the top andY
into which said pair of tongues extend to permit
being in two parts, one comprising a pavement
surface member, and the other a resilient sur
manipulation of said bolts; a cover for said well; 65 face member backing shaped to be carried by
cover anchor means carried within the well; and
said tongues; said bolt means passing through
bolt means interengaging said cover and said an
both of said cover parts and being operable by
’
exposed parts at the top side of said cover pave
6. A pavement comprising a plurality of indi
ment surface part.
' vidual, preformed slabs; tongues ñxed t0 said 70
FRANKLIN W. ABEL,
chor means.
`slabs to extend from edge faces, said tongues
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