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Патент USA US2110738

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March 8, 1938.‘
F, '0, PARKER
v2,110,738
ROAD JOINT FORMING MEANS on THE.LIKE
‘
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Filed‘ June 5, 1936
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INVENTOR
EeA/v/r 0. 24465656
BY
_
ATTORNEY
'
Patented Mar. 8, 1938
' 2,110,738
‘ UNITED STATES‘
.
PATENT‘ OFFICE
2,110,738
ROAD JOINT FORlt?NG MEANS OR THE
LIKE
Frank 0. Parker, Buffalo, N. Y., assignor to Acme
Steel & Malleable Iron Works, Inc., Buffalo,
N. Y., a corporation of New York
.
Application June 5, 1936, Serial‘ No. 83,670
4 Claims. (Cl. 94-18)
The present invention relates to improvements
in what is known as the “dowel” type of supports
for the joints between concrete slabs or the like
and for transmitting the load from one slab to
its adjoining slab.
The invention is more. par
ticularly applicable in connection with the trans
verse joints of concrete roadways.
shown in Fig. 1, parts in elevation, and showing
.
Some of the objects of the invention are as
follows:
i
a concrete roadway showing the joint support
involved in elevation, and secured to an expan
sion ?ller, with parts of. the joint support em
bedded in the concrete;
Fig. 2 is a horizontal section of the support 5
a portion of an expansion ?ller;
Fig. 3 is a transverse section on the line 3—3,
Fig. 2, in the direction of the arrows;
'
To provide a male member of the dowel type
which is adapted to be embedded and anchored
in one of the slabs of'a concrete roadway to ex~
tend across the transverse joint therein, a rea
sonable length thereof terminating in the adja
15 cent slab or section and there having a tele
scopic or sliding connection with a female mem
Fig. 4 is a transverse section on the line 4-4, 10
Fig. 2, in the direction of the arrows, that is, in
a direction opposite to that of Fig. 3; and
Fig. 5 illustrates a slight modi?cation of a male
member.
_
Referring to Fig. 1, there is illustrated the sub- 15
base or sub-grade ill on which rest the concrete
ber embedded in such adjacent section, the male
or other slabs or sections II, I2 having a trans
member being so constructed as to have its
verse joint therebetween for receiving the expan
greatest strength disposed at the transverse joint, sion ?ller or expansion joint I3.
20 where the shearing action or tendency is the
Referring to Figs. 1 to 4 inclusive, the present 20
greatest between the two members, whether or invention includes a male member, more or less
not the joint is a plain joint or one which is wide of dowel type, and it comprises a male member
enough so as to receive the well known expansion
proper l4. Preferably the male member proper
?ller of bituminous material or the like; to pro
i4 is cylindrical and is preferably made hollow
vide on the male member an abutment member
such as a ?ange, for example, which is prefer
ably so located as to contact with one of the sur
faces of the expansion ?ller and to impart addi
tional strength to the male member just where
such added strength is needed, and such abut
solid throughout, although it may be made solid
if desired.
I ment member or ?ange furthermore prevents the
stem or shank 15 of preferably less diameter, the
same being aligned with the longitudinal axis of
member M. An abutment member 16, which
concrete from cracking and breaking and, also
acts as a support during the work of installation
and the pouring of the concrete; to provide means
Ll
or tubular so as to give it the necessary strength 25
without the added expense of more metal, as
would be the case if. the male member I4 was
connecting the male and female members rigidly
together at opposite sides of the expansion ?ller
and to obtain perfect alignment between the two
members, such connecting means being prefer
ably of a temporary nature so as to be rendered
41 useless'by the contraction and expansion of the
Member I4 is provided with an anchor portion, 30 .
may be in the form of an annular ?ange or
shoulder, is located on the inner end of the male 35
member proper and at the adjacent end of they
anchoring shank IS. The outer extremity of the
anchoring shank I5 is provided with lateral pro
jections I‘! for safer anchorage.
,
It will be readily understood that if and when 40
the male member proper I4 is made of greater di
concrete slabs after the concrete has set, for ex
ample, the temporary connecting means shown, ’ ameter than the anchoring .stem or shank i5,
described and claimed in my copending applica
and particularly if. a strengthening ?ange or the
tion Serial No. 1,482, ?led January 12, 1935; and like I6 is provided, that such members are so
to make the male member and female member
of such metal as to reduce and tend to eliminate
corrosion.
_
‘
These being among the objects‘of the vpresent
invention, the same consists of certain features
50 of construction and combinations of parts to be
hereinafter described and then claimed with
reference to the accompanying drawing illustrat
ing a preferred embodiment of the invention and
wherein:
Fig. 1 is a longitudinal section of a portion of
arranged and constructed as to impart great 45
resistance against the tendency to shear them in
the immediate zone in which the expansion ?ller
I3 is used, and where such tendency is the
greatest.
A female member 18 is provided which is open . 50
at one end‘ to receive and telescope with the male
member proper i4, and such female member is
preferably closed at its other end and is also
preferably cylindrical.
The interior of the fe
male member is of slightly greater diameter than 55 .
2
2,110,788
the male member proper I4 so as to provide for
a telescopic and sliding connection between the
two members and yet not allow very much clear
ance between the two members, although the
CI clearance may be as desired and as. the condi
tions warrant. Female member I8 may be pro
vided if desired with resistance or anchoring
projections I9 extending laterally therefrom at
its closed end.
The flange It or the like of the
10 male member is provided with two or more holes
20 extending across its thickness, and when two
holes are provided they are preferably 'at dia
metrically opposite sides of member I6.
Two or more laterally projecting lugs 2! are
15 on the open end of the female member I8, while
two or more lateral lugs 22 are located between
mansions serve the purpose very well, but of
course may be varied within reasonable limits.
‘ To- install the various parts it is preferred that
that be done before the expansion ?ller I3 is
placed along the line of the ‘ultimate transverse
joint to be formed between the slabs II, I2, so
that a number of the joint supports can' be
mounted upon the expansion filler in their de
sired ultimate positions, and if the filler I3 is
?exible as the usual bituminous expansion ?ll 10
ers are, the same may be suitably stiifened by a
stiffening member which is removed after the
concrete has been set and hardened, all as dis
closed in my aforesaid copending application.
Therefore, each male dowel I4, I5 has its male
member proper I4 entered through a preformed
the lugs 2| and the closed end of female member hole in the ?ller I3, the same being fully intro- .
I8, and the bases of these lugs are preferably _ duced when the member I6 is brought in hear
enlarged for the sake of strength. Preferably ing relation with the adjacent surface of the
filler so that the longitudinal axis of the male
20 the lugs 2 I, 22 are in pairs, with the lugs of each
pair 2| or 22, as the case may be, projecting dowel stands at right angles to the plane of the
radially from diametrically opposite sides of the filler. The adjacent end portion of the male
female member I8, and the holes 20 in the mem
member proper I4 vwill then snugly fit into the
ber I6 will then be so arranged that when the hole of the ?ller. If two temporary connect~
25 male member proper I4 and the female member ing bolts 24, 25 are to be used, it is preferred that
I8 are telescoped together properly, they will be the holes 20 lie in a horizontal plane lengthwise
aligned with the lugs.
of the ?ller, as disclosed by Figs. 1 and 2. The
Preferably each of the lugs 2|, 22 is hook female member I8 is then introduced over the
shaped and in such case the recesses of the re
male member proper I4 until the end adjacent
30 spective pairs of lugs 2|, 22 will be presented in the filler I3 is brought up to the corresponding 30
opposite directions for obtaining easy assembly surface of the filler, the female member being
of the male and female members when bolts such so adjusted as to bring the recesses of the lugs
as 24, 25 are passed through the holes 20 of the 2|, 22 into the same horizontal plane as that of
member I6. Then the heads 23 of the bolts will the holes 20 in the member I6 which abuts the
opposite surface of the filler." The temporary
35 bear on the lugs 22and nuts 26 or similar fas
tenings for the bolts will bear on the abutment ‘bolts 24, 25 are then passed through- the regis
member I5.
-
Inasmuch as the concrete of a roadway ex
pands and contracts at opposite sides of the
40 transverse joints therein and as the present in
vention is more particularly intended for use in
tering vrecesses of the lugs 2|, 22 and through
the holes 20, the filler I3 having been preformed
with holes to receive said bolts, although the
bolts may be driven through the material of the 40
tenings or connections, which are used for as
filler if it is made of the usual material. The
heads 23 of the bolts preferably engage the lugs
22, while the threaded ends of the bolts pass
sembling the male and the female members and
through the member I6 and project suiliciently
transmitting loads across such joints, the fas
45 during the installation of the involved parts, are
of such a nature that after the concrete has set
and hardened and expansion or contraction oc
curs, the fastenings or connections will be ren
dered useless; that is, they are temporary con
50 nections not int-ended to resist expansion or con
~ traction, and may be as shown, described and
so as to receive the nuts 26. The nuts are then 45
tightened up so as to ?rmly and positively tem
porarily connect the male dowel I4, I5 and the
female member I8. The longitudinal axis of the
female member I8 will then coincide with the
longitudinal axis of the male dowel I4, I5. An
other unit of the so assembled parts is then
claimed in my aforesaid copending application.
_ mounted in the desired spacial relation along
Preferably,the female member I8 and its parts the filler I3 and it is preferred that the parts
are made of one malleable iron casting, and such of each assembled unit be in reverse relation to
55 is preferably the case with respect to the male the adjoining assembled units, so that the units 55
member and its parts. When these members are along the length of the filler will alternate, that
is, the anchoring shanks or stems I5 will alter
made of malleable iron, there will be less cor
rosion than that of any known joint supports, nately extend in opposite directions and simi
as the others are usually'all steel or other metal larly the female members I8 will alternately
60 or pressed steel and some part thereof is liable extend in opposite directions.
60
After assembly of the joint supports on the
to rust easily and lose its necessary strength.
The dimensions of the parts may be as follows:
The entire length of the dowel type of male mem
' her seven inches, the length of the male member
65 proper I4 three inches and the length of the
anchoring shank or stem three and three-quar
ter inches, with the thickness of the ?ange I6 a
quarter of an inch or more; the diameter of the
70 male member proper one'and one-half inches,
the diameter of the anchoring stem or shank
?ller, one man can handle the same and place the '
?ller I3 in desired position upon the sub-base I 0
to de?ne the ultimate transverse joint to be
formed in the roadway. After the joint sup
ports have been ?rmly united with the filler,
such handling will not disturb the joint supports,
‘inasmuch as the two members of each pair or set
will be prevented by the bolts 24, 25‘ from twisting
with respect to each other and from getting out
of alignment with each other. The building of
three quarters of an inch and the diameter of the . the concrete. roadway is then proceeded with in
member I6 two and one-half inches; the length the usual manner so as to provide concrete slabs
of the female member three and one-quarter’ II , l2 at each side of the joint between them,v
The pouring of the concrete to provide each slab 75
75 inches and its diameter two inches. ‘These di
3
2,110,738
will not shift the members of the joint supports
from their assembled ‘relation on the filler l3.
When any two adjoining slabs have been made
and the concrete has set and hardened, the joint
supports will perform their required functions in
spite of the presence of the connecting bolts 24,
25 inasmuch as when the concrete contracts, the
temporary fastenings will be broken, as by the
stripping of the nuts 26 from the threaded ends
10 of the bolts, whose threads and the threads of
the nuts may be slight enough and the hold
weak enough to permit such functioning. Should
the concrete expand, the pressure of say slab I2
against the heads of the bolts will force the
15 threaded ends of the bolts through the nuts, as
the held there is weak. In the case of either
contraction or expansion of the concrete slabs,
the improved joint supports will be telescoped by
the movement of the parts in one or the other
20 direction, and the load on one slab will at the
same time be transmitted to the other slab, so
that the adjoining ends of the slabs will not rise
one above the other, due to the fact that neither
of the members of the pair of joint supports can
25 have any relative transverse movement due to
the preferred snug yet sliding ?t between the two
members of the pair. The tendency to shearis
ferred to, as will be obvious to those skilled in
the art without departing from the scope of the
appended claims.
What I claim as new is—
1. In a road joint support, the combination of
a male member and a female member, both of
dowel type, which slidably inter?t and are
adapted to be anchored in adjacent slabs of a
roadway, the entering portion of the male mem
ber being integral with, in line with and of 10
greater diameter than the anchorage portion of
the male member to reduce the possibility of
shearing the male member across the inner end
of such entering portion, which end passes across
15
the joint between the slabs.
2. A‘ male member of a road joint support,
adapted to cooperate with a female member and
comprising‘ an’ anchoring shank and. an elon
gated hollow portion at one end of the shank
and integral therewith, the shank and hollow 20
portion forming a dowel, and which hollow por
tion is adapted to pass through a joint ?ller and
is of greater diameter than the shank to re
duce the possibility of shearing the male member
25
across the inner end of such portion.
3. A female member of a road joint support
having a tubular portion for receiving and con
minimized because of the increased resistance
necting with a male member of the support and
thereto by the preferred construction of male
dowel, which is strongest just where the strength
having bolt receiving lugs at the outside of its
tubular portion, and located at opposite sides 30
thereof, there being a pair of such lugs at each
is desired.
The lugs 22 on the female member being then
fully embedded in the concrete may aiford su?i
cient anchorage for the female member so that
the lateral projections l9 thereof may be omitted
or reduced in size.
If desired, graphite may be .
introduced between the sliding surfaces of the
two members l4 and, I8 so as to lubricate the .
parts.
In Fig. 5 a slight modi?cation of the male
40
member proper is illustrated in which such mem
ber 21 is still hollow, but is cast with a reinforc
ing web 28 extending in a diametrical plane
thereof, which is preferred to be vertically of
45 the roadway when-such modi?ed construction of
male members are used.
Obviously the invention is susceptible of other
modi?cations and adaptations than those re
side spaced apart along the tubular portion and
the lugs of each pair being hook-shaped and hav
ing the recesses under the hooks opening in op
posite directions, such lugs adapted for additional 35
connection with such male member.
4. In a road joint support, the combination of
an integral male member and a female member
for anchorage in adjacent slabs respectively of
a roadway, the male member being enlarged in 40
cross section beyond its midlength to provide
thereat greater shearing resistance when ex
tended across a joint filler, and the male member
having‘ a peripheral shoulder, located at the in
ner end of such enlargement, adapted to abut
the joint ?ller.
.
FRANK 0. PARKER.
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