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Патент USA US2134641

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Oct. 25, 1.938.
E. MUNDT
2,134,641
M-ACI-IINE FOR EMPLACING EXPANSION JOINTS AND DOWEL BARS
Original Filed July 20, 1934
4 sheets-sheet 1
Oct. 25, 19385..
E, MUNDT
2,134,641
MACHINE FOR EMPLACING EXPANSION JOINTS AND DOWEL BARS
Original Filed July 20, 1934
'7
I ‘
T313, 5.
4 Sheets-Sheet 2
25, 1938.
E. MUNDT
2,134,641
MACHINE FOR EMPLACING EXPANSION JOINTS AND DOWEL BARS
Original Filed July 20, 1934
4 Sheets-Sheet 3
Uct.25,1938. '
'
E MUNDT
'
2,33%“
MACHINE FOR EMPLAGING EXPANSION JOINTS AND DOWEL BARS
Original Filed July 20‘, 1934
, I
J Subgrzza’e
4 Sheets-Sheet 4
Patented Oct. 25, 1938
2,134,641
UNITED STATES‘ PATENT’ oFFicE
2,134,641
’ MACHINE FOR EIMPLACING EXPANSION
JOINTS AND‘ DOWEL BARS
Edward Mundt, Streator, Ill., assignor to Robb
& Robb, Cleveland, Ohio
Application July 20, 1934, Serial No. ‘736,246
Renewed August 26,1938
24 Claims.
in
The present invention has relation to construc
tion of concrete roads or pavement. As is well
known, it is customary in the building of concrete
roads, to accommodate for the expansion and
accurately spaced in proper parallel lines re
specting said pavement structure. By means
forming a part of the invention, when the as.
sembly of the expansion member and dowel bars
‘.contraction of the concrete under varying tem
perature conditions by the installation, at spaced
intervals in the length of the concrete pavement,
‘of expansion joints’. Moreover, in order to main
has been made and the machine moved upon
the road’ forms or rails aforesaid to the proper
place at which the joint and bars are to be in
stalled, these parts may be lowered into their
tain'the sections'of the pavement in proper re
lQ; lation at opposite sides’ of,v the expansion joint,
de?nitely predetermined position relatively to the
subgrade. The concrete may thereafter be em
it is common to avail of a seriesof dowel bars
by‘ which to interlock or connect the sections
placed atropposite sides of the joint member to
together. The ‘expansion joints are customarily
positions embedded in the concrete. Thereafter,
located transversely of the road subgrade, and
the dowelbars are disposed longitudinally there
of, or in the direction of the traffic flow.
The primary object of my invention is to pro
vide a machine for facilitating the installation
‘of the expansion joint and dowel bar members
by'sp-ecial provisions forming a part of the in
vention, the instnlmentalities by which the ma
above referred to, It is an essential desideratum,
to the subgrade, may be released and the ma
for the proper engineering of concrete roads or
pavements,‘ that the expansion joint member
which is usually preemolded of bituminous ma
terial shall belocated accurately at right angles
2,5‘, to ‘the subgrade and center line of the pave
ment., For the same reason it is required that
the dowel'bars be installed accurately parallel
with such-subgrade and center line of the pave
ment.
i
(Cl. 94-—51)
3v.'
'
r
The machine of my invention provides mech
10
hold the same with the dowel bars in proper
15
chine itself is accurately located over the sub
grade, and the instrumentalities by which the
joint member and the dowel bars are supported
in accurately predetermined positions relatively
chine .moved progressively to a place where, in
the elevated position of its frame parts, a fresh
expansion member and associated set of dowel
bars may be disposed thereon and the opera
tion carried on‘ progressively in the manner above 25
set forth.
By reason of the features of my machine above
outlined, the emplacement of the expansion
joints and/or dowel bars associated therewith,
in respect to‘ the pavement,_is de?nitely coordi
nated with the sections of the pavement with
expansion joint members and dowel bars or mem-‘ -which these parts are to cooperate so that each
bers in the manner above referred to, may be ' joint will be correctly placed and will function,
properly from an engineering standpoint. Fur
ensured.
anism by which the accurate placement of the
, In the carrying out of my inventionvI con
thermore, the expansion joint and dowel bar 35
template the employment of a portable machine
mounted on wheels adapted to travel along the
side forms located at'the‘ opposite sides of the
subgrade preliminarily to the depositing of the
installations are adapted to be performed quickly -
40 concrete ‘ between said forms for the pavement
construction. My machine is equipped with in
strumentalities whereby the main frame member
thereof may be adjusted to assume an elevated
position, and- while so elevated will permit of '
quick and easy ‘disposing of the expansion joint
' member and the dowel bars to be‘ associated
therewith‘in a complete assembly upon the ma
chine ready for, ‘installation. Suitable devices
are employed to ensure that the assembly. of
50 the expansion. joint and dowel members is ac
so that the paving operation is not likely to be
delayed in any way during the progressive de
positing of the concrete upon the road, all of
which is of material importance from a practie 40
cal viewpoint in the construction of roads of the
type referred to.
As‘ compared with the common method of ex
pansion joint and dowel bar installation, requir
ing the employment of iron stakes driven into 45
the subgrade, and the utilization of chairs or
special supports for holding the dowel bars in
proper positions, my’ machine method of han
dling these installations affords a considerable
saving of material such as the stakes or pins 50
curately arranged so that when these members
and chairs, as vwell as affording a material sav
are lowered'relatively to the subgra'de they will
ing in labor that is incident to the actual posi
tioning of the said stakes and chairs in accurate
locations for the purpose in view.
A complete understanding of the invention and 55
be properly positioned with the expansion joint
at a right angle, to the line of the pavement to
55 be constructed andwith the various dowel bars
2
2,134,641
the merits thereof under practical conditions of
use in the building of concrete pavement or roads
will be had by reference to the following de
tailed description, and to the accompanying
drawings, in which
Figure 1 is a view in front elevation of a ma
chine or apparatus embodying the essential fea
tures of my invention.
Figrue 2 is a top plan view of the same.
10
Figure 3 is a fragmentary sectional view of a
portion of a concrete road illustrating the ex
pansion joint member and a dowel bar as when
pivotally attached at 8 to said ends of the mem
ber 3. A boss or sleeve-like member 9 is rigid
ly secured to each end of the frame member 3
and provides an extended bearing thereon for
the pivot 8, as well as forming a spacing bearing
part between the sides of the carrier members 4.
Mounted in suitable bearings I!) attached in any
substantial manner to the upper portions of the
ends of each frame member is a horizontal actu
ating shaft H equipped near its ends and adja 10
cent to the bearings l0 with worm gears l2 suit
ably keyed to the shaft and engaging with the
installed by the apparatus.
teeth of the worm sectors 5 which virtually con
Figure 4 is an enlarged plan view of one of the
end supports for the main frame and a portion
of the main frame extending therefrom show
ing more clearly certain details.
Figure 5 is a view in side elevation of the end
stitute worm gears.
support, dotted lines illustrating the elevated
position of the frame affected by the raising ac
tion of the carrier members for the wheels.
Figure 6 is a horizontal sectional view through
one of the end supports.
Figure '7 is a fragmentary sectional view taken
25 about on the line 1-1 of Figure 4.
Figure 8 is a fragmentary sectional view taken
about on the line 8—8 of Figure 7, looking in
the direction of the arrows.
Figure 9 is a fragmentary plan view of a por
30 tion of the main frame, illustrating more fully
the disposition of the arms or guides for posi
tioning the dowel bars and the actuating means
for the supporting members provided to hold the
dowel bars in proper position upon the machine.
35
Figure 10 is a fragmentary sectional view taken
about on the line |0—ID of Figure 9, looking in
the direction of the‘ arrows, and bringing out the
detailed construction of the same general parts.
Figure 11 is a. fragmentary View in elevation
40 showing more clearly the mounting of the sup
porting members for the dowel bars and actuat
ing means therefor.
Figure 12 is a fragmentary view showing in
elevation the rail gripping or anchoring member
45 and the mounting means for the levers for oper
ating the dowel bar supporting members.
Figure 13 is a detail view in section taken about
on the line l3——l3 of Figure 10.
Figure 14 is a detail View of the ratchet mech
50 anism for operating the carrier members on the
end supports.
Speci?cally describing the machine of this in
vention, the same may be said to comprise a main
frame A fabricated by attachment together of
55 an angle bar I and a channel 2 to provide a long
frame structure adapted to span the subgrade on
which a concrete road is to be laid. The frame A
is mounted at its opposite ends upon end sup
ports generally denoted B, these end supports
being clearly shown in Figures 4 to 6 inclusive.
The end supports comprise a frame member 3
disposed transversely of the main frame A and
rigidly attached thereto by any suitable fasten
ing means. Included as parts of the end supports
65 B are carrier members 4 which comprise spaced
plates or side parts, seen best in Figure 6. One
of the plates or side parts of each carrier mem
ber It is extended at one end to provide a toothed
sector 5, the opposite end of said carrier mem
70 ber having mounted thereon a wheel 6 on the
axis member 7. The wheels 6 of the carrier
members 4 are disposed between the spaced side
parts thereof, and said carrier members also re
ceive between the said side‘parts the opposite
75 ends of the transverse frame member 3, being
The carrier members 4 are designed for pivotal 15
movement to shift the same from the approxi
mately horizontal positions of Figure 5 to the
approximately vertical positions illustrated in
dotted lines in the same ?gure, the movement of
said carrier members being effected by rotation 20
of the shaft l I by any suitable means. The means
illustrated is preferably of the manually actu
ated type and consists of a lever l3 for each shaft
I I.
The lower portion of said lever comprises 26
spaced sides I30. between which is disposed a
spring pressed double-acting ratchet dog M. The
ratchet dog l4 includes spaced ratchet members
Ma capable of engaging a toothed ratchet wheel
l5 keyed to the shaft H at the central portion 80
thereof and disposed between the side members
i 3a of the lever l3. The upper portion of the
ratchet dog M is provided with flats H5 at a
slight angle to each other, and these flats are
adapted to be engaged by the lateral arm I‘! of a 35
spring 18 attached to the inner face of one of the
side members |3a of the lever l3. The spring
pressure of the member I‘! is adapted to hold the
ratchet dog M in either of its reversed operating
positions as shown clearly by full and dotted 40
lines in Figure 14.
I
It is evident from the foregoing that by manu
ally grasping the upper end of the lever IS the
latter may be moved back and forth in a direction
parallel with the main frame A and thus the shaft
Il may be rotated in order to turn the screws or
worms l2 and thus actuate the carrier members 4
to move the same from their approximately hori
zontal positions to their vertical positions, and
vice versa, the shifting of said members to their 50
vertical positions elevating the frame at the end
thereof adjacent to which the particular lever I3
is located.
The mechanism asshown in Figures 4 to 6
inclusive is provided in duplicate, 'one mechanism 55
for each end of the main frame A so that the
frame A may be bodily elevated and lowered by
manual operation of the levers l3 by workmen 10- ~
cated at opposite ends of said main frame and at
opposite sides of the subgrade over which the 60
frame is supported.
It is to be understood that the members 4 func~
tion both as elevating and lowering means for the
main frame A, and they also function by reason
of the provision of their wheels 6 as traveling sup
ports, whereby the whole machine of the invention
may be moved longitudinally of the side or road
forms l9, which are clearly illustrated in Fig
ures 1 and 2.
Now it is an objective of the invention to pro— 70
vide means intermediate the frame of the ma
chine and the road forms l9 whereby to anchor
the machine ?rmly positioned against movement '
on the road forms when the machine has been
adjusted to the position in which the expansion
3
2,184,641
member and dowel bars are properly and accu
rately positioned over the road subgrade ready to
be embedded in the concrete to be laid thereon.
of the guide members 29. The dowel bar sup
porting member is designated 32am ‘consists of a
vertical shaft carried in bearings in suitable
brackets 33 attached to the vertical'portions of
For this purpose mechanismjshown best in Fig
the guide members 29. The lower ends of the
urese, 5 and 7 is employed. Such mechanism in
cludes a simple device in the form’ of a road form shafts or dowel supporting members 32 are
engaging member 23, the lower end‘ of which is formed with lateral supporting arms 34, and a
hook-shaped‘as at 2! to extend around and en-z spring 35 encircles each member 32 and has one
gage with the top ?ange of the road form l9. The end dead-ended on the guide member 29 adjacent
thereto, the other end of the spring being attached 10
10 member. 2|! is vertically movable in a bracket 22
at the uppermost portion of I which is a_ horizontal to the shaft and normally tending to hold the
cam 23-of spirally rising formation as seen best
in Figure 5.
.
'
_
Fastened to, the upper end of the member 20
by _a nut or any suitable means!!! is a camming
20
lever 25, the lower surface of which rides in con
tact’with the upper surface of the cam 23. The
‘lever, 25 may be manually grasped, and is rotat
able upon' the member 20 while the lever is in
contact with the upper surface of the cam 23, and‘
in this manner the hook portion 21 of themem
ber 29 may be raised and lowered to positively en
gage and become disengaged, respectively, from
the top ?ange of the road form. An anchoring
25 device such as just described will be provided on
the frame member 3 of each end support so that
the machine may be locked'or anchored ?rmly to
the road forms l9 at opposite sides of the sub
. grade when the machine is ready for the emplace
ment of the expansion member and dowel bar as
sembly to be embedded in the concrete deposited
on the subgrade.
"
receiving
At its upper end each of the dowel bar support
ing members or shafts ‘32 is equipped with an 15
actuating arm 36 having a down-bent extremity
engaging one side of a link 3‘! forming a part of
a trip device including a second link 38 piv
oted to the link 31 and also pivoted to a clamp
member 39 which is clamped about an operating 20
rod 40, the operating rod 40 sliding lengthwise
of the main frame A in guides or bearing mem
bers Ill laterally offsetting from said main frame.
Now it is to be understood that each of the guide
members 29 is equipped with a dowel bar sup 25
porting member 32 and the actuating parts there
for which have just been described. Moreover,
it will be seen‘from the drawings that I provide
an operating rod 40 for, the seat of the dowel bar
supporting members 32 located at the front, of 30
the frame’ A, and a second operating rod '40 for
the dowel supporting memberslocated at the rear
'
‘The means for supporting the expansion mem
ber, designated 26, upon the main frame A of the
machine, comprises a
arm 34 of each member 32 engaged beneath a
- dowel bar received in the ‘seat 31.
.
or a clamping
member which includes a relatively deep vertical
plate 2'! and a relatively shallow, similar plate 28
spaced therefrom, the two plates 21 and 28 being
of the frame A. 'To operatethe rodsml I provide
an actuating lever 42 at one‘yend'of each rod,
see Figure 8, said lever being pivoted at 33 and 35
being adapted to be heldrin either its open or
closed position, as shown in Figure '7, by means
of a latch adapted to engage in the notches M
4.0 theupper end portion of the expansion member
of an ordinary locking sector 45 of known type
construction. By adjustment of thelever 42 in
26 as seen best 'in Figure 10 of the drawings.
one direction, therefore, it will actuate its rod 49
adapted to snugly receive and slightly clamp
The expansion members are out to proper length ‘to open the seats 30 by turning the dowel bar
to conform with the width of the pavement‘to be supporting arms 49, and when the lever is locked
laid upon the sub'grade previous to inserting the in such position the seats will remain open in
45 expansion members into the holding means there preparation for the reception of the dowel bars. 46
Or, if the leverr42 is operated in the opposite
for comprising the parts 21 and 28, and further
.more the said expansion members are formed direction to the closed position of Figure 7, the
arms 34 will be turnedto. close the seats 33, in
with holes therethrough at the properpoints ver
tically thereof through which holes the dowel bars. which positions the arms 34 will extend beneath
to be assembled with, the expansion member upon the dowel bars and carry the same, as well shown 50
the frame ‘A may pass.
.
in Figures 10 and 11.
v
I utilize dowel bar supporting means in my ma
chine as means not only for carrying the dowel
bars in proper assembled relation to the expan
sion member, but I employ these dowel bars large
ly as the supporting means for holding the expan
sion member in position in the holding devices
27-48 previously described.
.
a
Reference is now made to Figures 9 to 11 inclu
60 sive for a full understanding of the method of
assembling and supporting the dowel bars upon
the main frame A. Located at intervals in the
length of the main frame A are a series of de
pendingrguide members 29, the upper ends of
65 which are "laterally extended and attached to the
. angle and channel plates land 2, respectively,
that constitute thefabricated frame A. The low
erends of the guide members 29 as seen in Fig
ure 11 are formed with seats 30 to receive the
70 horizontally disposed dowel bars 3!, these seats
being open at one side of the members29. Means
for holding the dowel bars v3| in the seats '30 of
Of course the levers 42
may be provided one for each rod 49 and located '
near one of the end supports of the machine as
illustrated, or‘ these levers may be duplicated at
the opposite end of the machine if so desired.
55
Operation of machine
The foregoing'sets'forth the general construc
tion and arrangement of the parts of my ma
chine, and the operation thereof is compara
60
tively simple, as will now be set'forth.
Since the machine is susceptible of travel along
the road forms at opposite sides of the sub-grade,
it may be disposed in a convenient position. out
of the way of the paving operation, with the 65
main frame elevated by adjustment of the end
supports as shown in dotted lines in Figure 5,
this elevation of course being accomplished by
actuation of the two levers I3 at oppcsite ends of
the machine. With the main frame A elevated 70
as stated, the bituminous or other type of expan-'
sion joint member 26 is placed in its holding
means 2T~28 previously described, the expan
the guidemembers 29 are provided, these means
comprising a dowel bar supporting member’ and . sion member of course being- cut of a length cor
75 actuating means therefor, one provided‘ for each responding exactly with the cross section of the 75
4
2,134,641
pavement to be laid. Thereupon- the dowel bars
3| will be inserted through the holes provided
in the expansion member 26 and positioned in the
seats of the guide members 29 in the manner
shown in Figures 10 and 11 of the drawings,
after which the levers 42 will be actuated to move
the operating rods 43 and closing of the seats 30
by the arms 34 of the dowel bar supporting mem
bers 32.
The expansion member and the various dowel
bars properly disposed in relation. to each other
as an assemblage are now supported on the main
frame A of the machine largely by means of the
arms 34 of the members 32 and the machine is
15 now ready to be moved along the road rails to
the positon at which'the expansion member and
dowel bar assembly is to be emplaced above the
subgrade ready to be embedded in the concrete.
The machine is now caused to be moved to .the
20 proper position on the subgrade for the proper
and accurate positioning of the expansion mem
ber and the dowel bar assembly, and then by
actuation of the levers l3 again the said assembly
is lowered by the shifting of the carrier members
4 to their horizontal positions. To prevent any
improper movements of the machine after it is
lowered in the manner stated, the machine is an
chored to the road rails or forms by means of
the lever 25, cam 23, and hook 2! devices previ
30 ously described.
The concrete is then placed in position against
the exposed side of the expansion member to hold
it ?rmly in place, and when the concrete has
been disposed on both sides thereof to the eleva
tion of the ?nished pavement, the expansion
member with the dowel bars will be properly em
bedded in the exact and accurate positions re
quired for these parts in reference to be pave
ment. The machine is now ready to be moved to
40 another convenient position on the road forms
by the application thereto of another fresh as
sembly of expansion member and dowel bar parts.
In order to do this the dowel bars 3! are released
by the actuation of the levers 42 which move the
45 rods 40 and carry the clamping members 39
lengthwise of the main frame A, the arms 36
traveling in the direction of withdrawing move
ment of the links 31 and thus permitting the
dowel bar supporting members 34 to open the
50 seats 30. The anchorage means comprising the
road form engaging hooks 2! may now be released
and after this is done the levers I 3 will be oper
ated to elevate the frame A and cause the expan
sion member and dowel bar holding means to be
55 elevated ready to receive the fresh assembly
of such parts for the next emplacement oper
ation.
‘
It may be noted that the main frame and
end supporting means of my machine consti
60 tute a traveling support adapted to travel on
road rails or the like over a road subgrade.
Moreover, it is to be understood that I do not
wish to be limited to the use of my machine in
conjunction with any particular type of expan
65 sion joint member because the holding means
may be adapted to different constructions or
types of expansion joints, of which there are a
number of types in use today. Nor do I wish
70 it to be limited to the particular proportions of
the parts as illustrated in the drawings, because these may be varied, dependent upon the
particular type of expansion joint being handled
and other considerations as for instance the
75 disposition of dowel bars and the required ar
rangement of such dowel bars to the joint mem
ber.
While I have described and illustrated my ma
chine as it is used in conjunction with installa
tion of expansion joints of concrete and like
pavements particularly, it is notable that the
principles of construction employed by me are
equally useful when my machine is adopted for
the-purpose of’ handling and installing contrac
tion joints. Contraction joints are very similar
to expansion joints, and dowel bars are likewise
used therewith in many instances. My joint
holding devices may be constructed to hold and
install contraction joints just as they are now
illustrated as suitable for the installation of
expansion joints. I therefore desire that my
speci?cation and claims be read in the light of
the utility of my machine for joint means gen
erally whether of the expansion or contraction
type.
20
Having thus described my invention, What I
claim as new and desire to secure by Letters Pat
ent of the United States, is—
I. In a machine of the class described, in com
bination, a main frame adapted to travel above
a road subgrade relative to which expansion
joint members and/or dowel bars are to be po
sitioned, end frames for the main frame trans
verse thereto, raising and lowering devices on
the end frames for elevating and lowering the 30
main frame, and comprising wheels for facili
tating the travel of the machine over the sub
grade, anchorage devices carried by the end
frames for connecting the machine positively to
road forms upon which it may be supported,
manual means for actuating said anchorage de
vices to engage and release the same from the
road forms, holding means on the main frame
to be raised and lowered therewith cooperative
with an expansion joint member, and dowel
bar supporting means carried by said main
frame, including dowel bar engaging and releas
ing devices, the last mentioned devices being
movable to hold the dowel bars in proper posi
tion for emplacement with the expansion mem
ber and releasing said dowel bars after such em
45
placement.
2. In a machine of the class described, in com
bination, a main frame, supporting means there~
for enabling movement of said frame over a road
subgrade, expansion joint holding members 50
mounted on said main frame, devices for sup
porting dowel bars on said main frame, mecha
nism whereby the said holding means and dowel
bar supporting means may be raised and low
ered, said dowel bar supporting means including
devices for supporting engagement with the
dowel bars and movable to release the latter.
3. In a machine of the class described, in
combination, a main frame, supporting means
therefor enabling movement of said frame over
a road subgrade, expansion joint holding mem
bers mounted on said main frame, devices for
supporting dowel bars on said main frame, mech
anism whereby the said holding means and
dowel bar supporting means may be raised and
lowered, said dowel bar supporting means in
cluding devices for supporting engagement with
the dowel bars and movable to release the latter,
and operating devicesfor causing engagement 70
and release action of the devices for engaging
and releasing the dowel bars.
4. In a machine of the class described, in
combination, a main frame, expansion joint
member holding means mounted on said frame, 715
g,
2,134,641
guide members carried‘by the mainframe coop
bers. to, hold dowel bars seated thereon in ?xed
and predetermined relation to- an expansion joint
member engaged by the holding means therefor,
ried by the holding means ‘therefor, dowel bar said engaging devices, comprising vertical shaft
engagingand releasing devices cooperative. to’ parts rotatable onthe guide members, and mov
able operating rods atvopposite sides of the ex
, hold dowel- bars engaged with the ‘guide mem
‘bers aforesaid,» andoperating means for said pansion joint member holding means, each of
erative to support ‘dowel bars in proper relation
thereto and to an, expansion .joint member car
engaging and, release devices.
said‘ operating rods being connected with a'series
5. In a machine of the class described, in of the said shafts for actuating the same to con
combination, a mainframe, expansion joint . trol adjustment thereof for engagement with 10
member holding means mounted on saidframe, dowel bars or for ‘releasing the latter from the
guide members carried, by the main frame co
operative to support dowel bars in proper rela-,
10. In combination, a main frame adapted to
tion thereto and to an expansion joint member span a road subgrade, traveling means enabling
1 5 carried‘ by the holding means therefor, dowel the movement of said frame over the road sub 15
guidingmembers.
bar‘ engaging and releasing devices cooperative
bers af0resaid,operating means for said engag
ing and release devices, traveling supports for
subgrade while disposed over the same, and in- ‘
to?vthe main frame and an expansion joint mem
strumentalities whereby the main frame: may be
jcaused‘to be elevated and lowered relatively to
ber carried’ by said holdingmeans, dowel bar en
gaging and releasing devices associated with said
guide members, and means accessible from the
the subgrade of the road over which it is dis
,
a
.
,
frame adjacent to said expansion joint holding
means for positioning of dowel bars relatively 20
20 the mainframeenabling its movement along a
posed.
w
grade, holding means for, an expansion joint
member disposed longitudinally of said main
frame, a plurality of guide members on the 'main
‘ to hold dowel bars engaged with the guide mem
25
'
. end of the main frame for simultaneously oper
_ 6. vIn‘a machine of the class described, in com
ating the dowel bar-engaging and releasing
bination, a frame adapted ‘to be moved over a
devicesyun
road subgrade on which concrete is to be laid,
holding means on said frame ‘for holding an
I
,m
'
25
V
' ll. In combination, a main frame adapted to
on said frame for supporting in accurate‘ rela
tion to the expansion joint member a series of
span a road’ subgrade, traveling means enabling
the movement of said» frame over the road sub 30
grade, holding means for an expansion joint
member disposed longitudinally of said main
dowel ‘ bars, including engaging and releasing
frame, a plurality of guide members on the main
expansion joint member, other supporting means
devices for said bars, and mechanism whereby
the frame and the said holding and supporting
frame adjacent to said expansion joint holding
means for positioning of dowel bars relatively to 35
parts may be elevated and lowered.
the main frame and an expansion joint member
_ '_
'7. In la machine of ‘the class described,.in
combination, a frame adapted to‘be disposed
above a road subgrade‘ and having" means en
ablingit to travel lengthwise of such subgrade,
.49 ‘ holding
means on the frame for an expansion
carried by said holding means, dowel bar engag
ing and releasing devices associated with said
guide members, means accessible from the end
of the main frame, for'simultaneously operating 40
the dowel bar engaging and releasing devices,
joint member, supporting means for dowel bars
carried by said frame and including vguide mem
bers having seats for the dowel bars, and engag .
ing members forholding the dowel bars in said
seats, together with means whereby the frame and its supported parts may be caused to 'move'
upwardly and downwardly relatively to the road
‘isubgrade, and means for operating said dowel
vbar engaging devices to cause same to be en'
gaged and disengaged in reference to the dowel‘
and ‘means ‘whereby the‘ main frame may be
raised- and lowered, and mechanism for actuating
bars cooperating with the ‘seats of-the guide. ,
to raise and lower the latter, and expansion joint
member holding meanson the main frame, said
members.
.
,
a
.
_,
'8. A portable machine for emplacing expan
sion'joint members and‘dowel bars in, concrete
‘ road construction," comprising a main frame,
means forraising and lowering the main frame,
expansion joint member holding means on the
main frame, guide membersi'disposed at'inter
60 vals along the main frame at opposite sides of
the expansion joint holding means, and dowel
bar engaging devices cooperating with said guide
-_ members to hold dowel bars seated thereon in
?xed and predetermined relation to an expan
sion joint member engaged by the holding means
therefor.
‘
i
'
V
9. A portable machine for emplacing expan
‘ sion joint members and dowel bars in concrete
road construction, comprising a main frame,
70 means for raising and lowering themain frame,
expansion ‘joint member holding means on the
theg‘last mentioned means.
~
‘
_' 12. In amachine of the class described, in com 45
bination,>a main frame adapted to span, a road
subgrade and to; be; moved thereover, carrier ‘
members at the end of said frame comprising
wheels adapted to travel on the road forms, actu
ating 'means for the carrier members for shift
ing their positions relatively to the main frame
actuating means comprising manually operable
worm devices and the carrier members having 55
toothed sectors to cooperate with said worm de
vices, whereby; the carrier, members may be
shifted from approximately horizontal positions
'to approximately vertical positions to elevate the
60
said frame.
13. In a machine for installing expansion joints
in pavement structures, in combination, a mobile
structure adapted to span a road subgrade, means
on said structure for supporting an expansion 65
joint in the relation to the subgrade Whichthe
expansion joint assumesrin the ?nal pavement
structure, and means for elevating and-lowering
the expansion joint supporting means.
14. In a machine for installing expansion
joints in pavement structures, in combination,
main frame, guide members disposed at intervals
alongthe main frame at opposite sides ‘of the
‘a frame adapted to span a road subgrade, wheeled
expansion joint holding means, dowel bar en
gaging devices cooperating with said guide mem
same over the subgrade, means on said frame for
supports for said frame enabling travel of the
supporting an expansion joint in the relation to
75
6
2,134,641
the subgrade which the expansion joint assumes
in the ?nal pavement structure, and means for
bodily elevating and lowering said frame and ex
pansion joint supporting means.
15. In a machine for installing expansion
joints in pavement structures, in combination,
a frame adapted to span a road subgrade, adjust
able means on said. frame for supporting an ex
pansion joint, and manipulatable instrumental
10 ities on said frame for adjusting said supporting
means to a position enabling the expansion joint
to be placed in the machine, and for moving the
expansion joint while supported by the supporting
means, into a predetermined relation to the sub
grade corresponding accurately to the position
which the expansion joint assumes in the ?nal
concrete including a supporting member disposed
on either side of said joint,‘ said members being
arranged to be removably positioned below the
top level of the concrete, and slidable means dis
posed beneath each, of said supporting members
for retaining said dowels in ?xed relationship
during the pouring of the concrete.
20. Supporting fabrication for reinforcing steel
in paving joints comprising parallel members op
posing said joint each having a plurality of in 10
dependently mounted rod retaining elements ca
pable of collective sliding movement for releas
ing said rods simultaneouslyto effect removal
of said supporting fabrication.
21. Supporting fabrication for tie rods and 15
dowels in concrete paving joints including rela
pavement structure.
tively parallel members arranged to be disposed
16. In a machine for installing expansion
joints in pavement structures, in combination, a
frame adapted to span a road subgrade, adjust
below the level of the forms between which said
concrete is placed, each member having rod re
able means on ‘said frame for supporting an ex
pansion joint, and manipulatable instrumental
ities on said frame for adjusting said supporting
means to a position enabling the expansion joint
25 to be placed in the machine, and for moving the -
expansion joint while supported by the support
ing means, into a predetermined relation to the
subgrade corresponding accurately to the posi
tion which the expansion joint assumes in the
?nal pavement structure, said instrumentalities
including mechanism for elevating and lowering
the frame relatively to the subgrade.
17. In a machine for installing expansion
joints in pavement structures, in combination, a
35 frame adapted to span a road subgrade, adjust
taining hooks mounted for independent and col 20
lective movement whereby to e?ect simultaneous
release of said rods preparatory to removing said
fabrication subsequent to the placing of said con
crete.
.
22. Apparatus for positioning tie rods, dowels 25
and other joint reinforcing in concrete paving in
cluding members spaced apart and disposed
operatively below the level of the forms receiving
said concrete, independently and collectively mov
able means for receiving and holding the ends of 30
said rods in predetermined spaced relationship
relatively and with respect to the concrete, and
able means on said frame for supporting an ex
means for anchoring said apparatus against dis
placement during the pouring of said concrete.
23. Apparatus for positioning and holding re 85
inforcing rods in making joints in concrete paving
pansion joint, and manipulatable instrumental
including parallel members having means for re
ities on said frame for adjusting said supporting
means to a position enabling the expansion joint
40 to be placed in the machine, and for moving the
expansion joint while supported by the support
ceiving the ends of said rods for holding the lat
ter relatively parallel and on a horizontal plane
at right angles to said members and means for 40
ing means, into a predetermined relation to the
releasing said rods simultaneously for removing
said apparatus subsequent to the pouring of said
subgrade corresponding accurately to the position
concrete.
which the expansion joint assumes in the ?nal
24. Expansion joint installing apparatus, com
prising a portable frame including parallel side 45
45 pavement structure, said instrumentalities includ
ing mechanism for independently elevating and
lowering the opposite ends of the frame relatively
members, means on said frame for supporting an
expansion joint from said side members and par
to the subgrade.
allel thereto, support bars carried by the side
members of the portable frame, guides on the
said support bars, movable latches carried by the 50
support bars and operating in said guides, the
18. Apparatus for positioning reinforcing bars
50 in concrete paving joints, including a pair of
spaced members in ?xed relationship and dis
posed below the top level of the paving, and slid
support bars being provided with means to re
able means adjacent each of said spaced mem—
ceive end portions of dowel rods, and operating
bers for retaining said bars in ?xed relationship
during the pouring of the concrete.
means for the said latches to cause them to re
19. Apparatus for positioning dowels in con
crete expansion joints during the pouring of the
tain the dowel rods in the support bar receiving 55
means when disposed therein.
EDWARD MUNDT.
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