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Патент USA US2123989

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July 19, 1938.
2,123,989
w_ p_ DAY
“
MACHINE FOR LAYING CONCRETE
Filed July 6, 1936
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?v INVENTOR.
ATTORNEY.
July 19, 1938.
w, P, DAY
'
2,123,989
MACHINE FOR LAYING CONCRETE
Filed July 6, 1936 -
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July 19, 1938..
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MACHINE FOR LAYING CONCRETE
Filed July e, 1936
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a ?VENTOR
ATTORNEY.
My 19, 1938.
I w. P. DAY
'
2,123,989.
MACHINE FOR LAYING CONCRETE
Filed July 6, 1936
‘
4 Sheets-Sheet 4
ATTORNEY.
Patented July 19, 1938
2,123,989
ATET OFFI€E
2,123,989
MAGHINE FOR LAYING CONCRETE
William P. Day, Cleveland, Ohio
Application July 6, 1936, Serial No. 88,929
4 Claims.
This invention relates to a method and appa
(CI. 94—46)
upon suitably mounted wheels ‘I, 8, 9 and i0
ratus for laying concrete in roadbeds such as a
city street, a highway or a street railway.
One of the objects of the invention is to pro
which are adapted to run upon either the railway
track or upon form boards. Carried by the side
frame member I are a pair of angular brackets
5 vide a method and apparatus for laying concrete
whereby a dryer and denser mixture may be laid
l i and i2 and carried by the side frame member 2
are a pair of brackets i3 and ill. Carried by
the frame of the machine and adjustably sup
ported with respect thereto is a bin or hopper I5
which extends the full width of the road to be
and the necessity for tamping eliminated.
Another object of the invention is to provide
a method and apparatus for laying concrete
10 which will cause the concrete to quickly settle
and set and which can be carried out in a mini
mum of time and with a great saving in both
equipment and labor.
Another object of the invention is to provide. a
15 method of laying concrete which consists in form
ing a layer of concrete of predetermined. height
and simultaneously applying rapid and violent
vibrations to the mass while it is being discharged
and after it has been discharged onto the roadbed
20 and at the same time applying vibrations to the
surface of the concrete whereby to produce a
concrete road which will set quickly and can be
opened to traflic in a minimum of time.
Another object of the invention is to provide
an apparatus which will practice the method
herein described and which can be produced at
a minimum cost.
Further and more limited objects of the inven
tion will appear as the description proceeds and.
by reference to the accompanying drawings in
which Fig. l is a top plan view of my improved
machine for laying concrete; Fig. 2 is a vertical
sectional View on the line 2—2 of Fig. 1; Fig. 3
is a vertical sectional View on the line 3—3 of
“ Fig. 1; Fig. 4 is a view of the machine in end
elevation; Fig. 5 is a transverse sectional View
on the line 5—5 of Fig. 1; Fig. 6 is a fragmentary
top plan View disclosing a modi?ed form of ma
laid and which is supported from the brackets
H, i2, i3 and M. Carried by the hopper and
disposed at opposite sides thereof are four angu
lar brackets iii, i7, i8 and [9 which are shown
mostly clearly in Fig. 2. Carried by the over
hanging portion of each of the brackets H, i2, 16
i3 and I4 is a threaded sleeve 20 to the lower end
of which is connected a ?exible connection 2|
having a head portion 22 disposed below the out
wardly projecting portions of the brackets l6, ll,
i8 and is.
A look nut 23 provides means for
adjustably supporting the hopper with respect to
the frame.
Carried by the hopper and rigidly connected
therewith is a strike oif plate or screen 24 the
leading edge of which is beveled as shown at 25
and disposed within the discharge‘ from the
hopper. A reinforcing bar 26 extends the full
width of the hopper and has its lower end con
nected with the screed 2d and its upper end con
nected with the hopper. The hopper has a bot
tom discharge outlet 2‘! which extends the full
width thereof. The forward portion of the hop
per is provide-d with a downwardly depending
plate portion 28 which extends the full width
thereof and the lower edge of which is adapted
to be positioned closely adjacent the top of the
‘subgrade. This plate portion 28 is provided with
chine adapted for laying concrete for forming
openings 29 and 30 adapted to receive the rails
therein when the machine is to be used in laying
roads or highways; Fig. '7 is a vertical sectional
a roadbed having rails.
"view disclosing another modi?ed form of my
machine which has means incorporated therein
for delivering to the road a mesh or reinforcing
grid; Fig. 8 is a fragmentary top plan view of
45 the machine shown in Fig. 7 and Fig. 9 is a frag
mentary view partly in section and partly in ele
vation illustrating the means for directing the
grid into the machine.
Referring now to the drawings, the machine
50 consists essentially of a frame made up of oppo
sitely disposed side frame members i and 2 and
transverse members 3 and d. Extending trans
versely of the machine and parallel with the side
members 3 and l! are a pair of cross members 5
55 and 6. Theframe is adapted to be supported
Secured to the rear face 40
of the plate portion 28 are a series of outwardly
projecting plates 3!, 32, 33, (i5, 36, 31, 38, 39, GI,
432 and 43. These plates are disposed within the
discharge outlet from the hopper and the plates
32, 36, 38 and 42 are disposed above the lower 45
series of plates and extend above the leading
edge of the screed 24.
Carried by the front side of the plate portion
28 of the hopper are a pair of angular brackets 44
and 45 in which is journaled a shaft 46 which 50
has nonrotatably secured thereto an eccentrically
mounted or off-center weight 41. Secured to the
outer end of the shaft ‘it is a pulley t8 the pur
pose of which will hereinafter appear. Mounted
on the frame of the machine is a power unit 49 5-5
2,123,989’
2.
which preferably is an internal combustion en
gine from which leads a shaft 50 on the outer
In Fig. 6, I have disclosed a slightly modi?ed
form of machine which is particularly adapted for
end of which is mounted a pulley 5| which is
operatively connected with pulley 48 by means of
a belt 52 and drives the shaft 46 which carries
This form of machine is identical with that dis
the eccentrically mounted weight 41.
The power
unit is also provided with a lever 53 which oper
ates a suitable clutch and forms a detachable
driving connection with the shaft 50.
The motor is capable of operation at a speed up
10
to about 1800 R. P. M., and the size of the pulleys
48 and 5| is such that the shaft 46 may be driven
at a speed of from 4000 to 6000 R. P. M. It will
thus be seen that very rapid and very violent
15 vibrations are‘ imparted to the hopper‘ and to the
series of vibratory members which are disposed
within the outlet from the hopper. It will be seen
that these rapid and violent vibrations are also
imparted to the screed or strike-off plate 24 which
20 is rigidly connected to the hopper l5.
When it is desired to lay a road having railway
tracks therein, I ?rst set up form boards 54 and
55 at opposite sides of the road. The machine is
then positioned upon the rails 56 and 5'! with the
in engagement therewith. The position of
2.5 wheels
the hopper with respect to the frame of the
machine is adjusted so that the lower edge of the
plate 28 is positioned a slight distance above
the top of the subgrade. The hopper when in
operation is kept ?lled with concrete up to about
the level shown in Fig. 5. With my machine, I am
able to use a very harsh concrete, the consistency
of the mix preferably being 1 part cement, 2 parts
sand and 4 parts coarse aggregate by volume and
3.5. .from 3 to 4 gallons of water per bag of cement.
The vibrations imparted to the hopper and to the
screed 24 and the vibratory members which are
disposed in the discharge outlet from the hopper
facilitate the flow of concrete from the hopper
4.0 and cause it to settle rapidly.
These vibrations
also tend to thoroughly mix the concrete and to
reduce the moisture content thereof. The plate
24 acts as both a vibrating screed and as a strike
oif plate.
At the ?rst operation, the concrete is caused to
closed in Figs. 1 to 5 inclusive except that the 5
wheels (only two of which are shown) ‘I’ and III’
are disposed adjacent one edge of the frame so
that they may roll upon the form boards instead
of upon the railway rails and an additional vibra
tory member is interposed between the members 10
33 and 35 and between the members 39 and 4| so
that there are six upper vibratory members and
seven lower Vibratory members disposed within
the discharge outlet from the hopper.
In Figs. ‘7, 8 and 9 there is disclosed another
slightly modi?ed form of my machine which is
particularly adapted for use in laying roads
where it is desired to incorporate into the road a
metal mesh or grid for reinforcing the road. This
form of the invention is identical with that dis
closed in Figs. 1 to 5 inclusive except that provi
sion is made for allowing the mesh to pass through
the hopper as the machine is moved forward. In
this form of the invention, the brackets 44- and
45 are replaced by smaller brackets 45’ which
support the shaft 46 which is connected with the
pulley 5| by the belt 52. The front wall of the
hopper is provided with a transversely extending
slot or opening 6| which extends substantially the
full width of the hopper and which is of sufficient
size to permit the mesh 62 to pass therethrough.
Also carried by the front wall of the hopper are
a pair of brackets 63 disposed at opposite sides of
the hopper and which support a roller 64 which
a slight distance apart as shown most clearly in
Fig. 9 so as to permit the mesh to pass there
The concrete may
be laid in a continuous operation and the speed of '
the machine is limited only by the speed at which
concrete may be fed into the hopper. It will be
seen that rapid and violent vibrations are im
parted to the concrete both above and below the
surface thereof while it is being laid and that
vibrations are simultaneously applied to the sur
face of the layer of concrete. With my method
and apparatus I am able to use what is known as
“no slump” concrete.
In order to prevent the vibration of the hopper
being imparted to the frame of the machine, I
have provided a plurality of bumper plates 58, 59,
70. 60 and 6| which are mounted on the frame of the
machine and are urged against the bar 26 by
strong coil springs. These springs tend to insu
late the hopper from the frame of the machine
and to reduce the vibration imparted to the
75,. frame.
25
30
passes through the slot in the front wall of the
hopper. In order to reinforce the front wall of
the hopper, I provide a plurality of angle irons 28'
which are preferably welded to the hopper and 40
serve to connect the upper and lower portions
thereof. I have provided a lower series of vibrat
ing plates 3|’ and an upper series of vibrating
plates 32' which are arranged as disposed and
preferably welded to the front wall of the hopper. 45
The upper and lower plates 3 | ' and 32’ are spaced
mines the height of the layer.
20
extends substantially the full Width of the hopper 35
screed 24 and to be packed thereunder. The
machine is moved over the roadbed by any suit
able means in the direction of the arrow in Fig. 5
at the rate of about 1 to 3 feet per minute, depend
ing upon the nature of the concrete and how
rapidly the concrete is being fed to the hopper.
As the machine is moved forward, the leading
edge of the strike-off screed 24 cuts through the
This vibrating screed deter
15
and which forms a vsupport for the mesh as it
' ?ow rearwardly under the vibrating strike-off
mass of concrete.
5.0.
use in laying roads where no rails are present.
between.
Disposed between the upper plates 32'
and preferably welded to the front wall 28 of the 50
hopper are a plurality of somewhat resilient metal
plates 65 the lower ends of which are slightly
rounded, as shown, and adapted to bear against
the top of the mesh. These plates 65 being rigidly
connected with the hopper which is vibrated, tend 55
to transmit the vibrations directly to the mesh
itself so that the mesh as well as the concrete is
being vibrated while being laid.
This form of the machine is operated in the
same manner as the machine disclosed in Figs. 1 60
to 5 inclusive and it will be seen that when the"
machine is in operation the vibrations will be
imparted to the mesh and also to the concrete
while it is being discharged and also to the surface
of the concrete as it is being formed.
65
It will now be clear that I have provided a.
method and apparatus for laying concrete which
will accomplish the objects of the invention as
hereinbefore stated. It will of course be under
stood that the embodiments of the invention 70
herein disclosed are merely illustrative and are not
to be considered in a limiting sense as various
changes may be made in the details of construc
tion and arrangement of parts without departing
from the spirit of my invention. The invention is 75
3
2,123,989
therefore limited only in accordance with the
scope of the appended claims.
Having thus described my invention, what I
claim is:
1. A machine for laying concrete comprising a
wheeled vehicle, a hopper carried by said vehicle
and having a discharge outlet, a member extend
ing across said hopper and forming one side of the
discharge outlet and having a series of pro
10 jections thereon which extend substantially across
said discharge outlet, a strike off screed beneath
which the concrete is formed, some of said pro
jections being disposed below and others being
disposed above the plane of said screed and means
15 for imparting rapid and violent vibrations to said
screed and to said projections.
2. A machine for laying concrete comprising a
hopper having a discharge outlet, a strike-off
screed disposed adjacent said discharge outlet, a
20 plurality of vibratory members disposed within
said discharge outlet and below said screed, means
for directing a reinforcing grid through said dis
charge outlet and means for imparting rapid and
violent vibrations to said vibratory members and
to said grid.
3. A machine for laying concrete comprising a
hopper having a. discharge outlet, a strike-off
screed disposed adjacent said discharge outlet and
having its forward edge projecting within the dis
charge outlet, a plurality of vibratory members
disposed within said discharge outlet and below
the plane of said screed, means for directing a
reinforcing mesh through one wall of said hopper 10
and means for imparting rapid and violent vibra
tions to said hopper and to said reinforcing mesh.
4. A machine for laying concrete comprising a
hopper having a discharge outlet, a strike-off
screed beneath which the concrete is formed, a 15
series of vibratory members disposed in the dis
charge outlet from said hopper in di?erent ver
tical planes, means for imparting rapid and violent
vibrations to said screed and to said vibratory
members, the front edge of said screed projecting 20
into the discharge outlet from said hopper ad
jacent said vibratory members.
WILLIAM P. DAY.
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