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Патент USA US2374025

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April 17, 1945(
E. H. I_‘IcHTr-:NBERG `
Filed March 16, 1942
4 Sheets-#Shee't 1
April 17, 1945
April 17, 1945.
Filed March ie, 1942
4 sheets-sheet s `
April 17, 1945.
Filed March 16, 1942- `
4 Sheets-Sheet 4,
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Patented Apr.' 17,' 1945
y2,374,025 '
' Erich H. Lichtenberg, Milwaukee, Wis., assignor „ _
to Koehring Company,' Milwaukee, Wis., a cor
` Application March is, 1942',l serial No. 434,963
is claims.
The present invention appertains to the art
vibrating means `is designed for operating the
.of finishing machines of the type designed for
screed. in .a direction generally longitudinally '
finishing concrete aggregates deposited uponv a
of "the road subgrade, as distinguished from the
action of the spreading means transversely to
subgrade of a road pavement, or the like. ,
_It is customary rfor machines of the type, .
above generally referred» to, to be supported at>
In addition/co the longitudinal movement of
opposite sides of the subgrade being paved by
the screed', above referred to, the actuating
means of road forms stationary upon thesub.
means causesv the samev to exert pressure forces
grade, the finishing machine being equipped
downwardly and .forwardly at an angle to the
with rollers o1- wheels to travel uponl such forms. l0 horizontal plane of the lsurface of the aggregates
The present invention involves certain im'
being emplaced on> the-subgrade. The action of
provements in spreading instrumentalities
the screed, as above described, affords a com
which are designed to mechanically. spread
pacting-.of the road aggregates in a peculiar
batches of concrete aggregates depositedupon
the subgrade, and further improvements .in_
Ímannerx not heretofore achieved by previous
volved herein relate to a screed unit of` novel
type forvperforming a finishing surface opera
tion `upon the aggregates after they have been
spread upon the subgrade.
In lcertain types of ñnishinggmachines utiliz--A '
» . Generally speaking, a> main object of my in
types of means of this sort.
ing spreading mechanism for the purposes of
this invention, the spreading means operates
transversely of the roadway or subgrade being
paved, and being driven by suitable ,power
-means, transverse forces, which are communi
cated to the spreading means, are transmitted
tothe road forms upon which the machine‘is
drive means for the same and a novel arrange
inwhìch the spreading devices are carried by
posite directions transversely of thesubgrade
frame of the machine, and to the frame and
Aiurther‘object of this invention is to provide
a novel arrangement of normally spaced spread- ,
ing devices and disposition thereof with .respect
Inzthe drawings:
tion with a frame for supporting the same and I
drive means for operating the respective units
and the machine. The .said machineis shown
stm another object of the inventionfresidesm
asv being-supported in va travel position by road
, the provision of peculiar means for‘vibrating or'
_actuating the’ñnishing screed provided as a part
of the screed unit' of the design of my machine
of my improved finishing machine. The said
character described, showing the arrangement
ofthe spreading and ñnishing units in conjunc
certain amount of the material being spread
to flow >between and past the spreading devices`
and to be ñnished oiî by any suitable auxiliary
‘ .Figure 1 is a sideview of a machine of the
tormoving means therefor, such as to permit a
Further'and more particular objects of this
inventionA will be .set forth in the accompanying
specification and claims, and referred to in the
drawings, inconjunction with a description of
the parts making up the machine shown in the
stresses from being thereby communicated tothe
videthe crown contour ‘for a road, `or the like,
and a further object of this invention is to pro
vide a screed in‘which the vibratory action is> a
reciprocatory action in a substantially angular
relationship with respect to the surface `of .the
screed which contacts the'concrete being iin
so as to neutralize the forces Set up'i‘n their
spreading action and prevent undue transverse
provide a novel form of strike-oft“ plate in which
the members are individually adjustable to pro
oppositely. moving sections or portions of the
beltor chain means, which portions move in op'
A still further object of this invention is to
ment of theyparts involved in the device above'
‘less .belt vor chain type of spreading mechanism '
the same assembled upon a main supporting
frame for the. machine rand operable >preferably
Another object of this invention isto provide
a novel arrangement of spreading instrumen
talities associated with the spreading unit, novel
One of the primary objects of the present ~in
vention, therefore, has been to provide an end
supporting wheels and road forms.
knovel spreading unit and a novel screed unit,
from the same power. plant.
mounted, tending to throw these forms out of
alignment, and loosen them,V in a disadvanta
geous manner for obvious reasons.
.vention Aprovide a machine comprising a
~ Figure 2 is a view taken about on the liner-2
of Figure 1, looking inthe direction of the‘ar
rows which illustrates the'arrangement‘of the
sectional screed, and substantially indicates the
vibratory member incorporated with said screed,
being denoted 2, and the transverse member in
dicated in the Figure 7 being denoted 3, suitable
including certain adjusting means therefor.
Certain portions of the machine are broken
away, and are illustrated further in other views.
Figure 3 is a fragmentary sectional view taken
about on the line 3-3 of Figure 2, illustrating
vertical frame members Il supported on the frame
members 2 and 3 in a conventional manner, and
'generally the> adjusting means for the finishing
nels or beams 5 and a transverse beam 6 at the
unit andthe individual _adjusting meansifor >the
screed members, as well as the vibrating instru
being connected thereto by welding or other suit
able means, the said upright members 4 having
connected at their upper ends longitudinal chan
junction of the longitudinal beams 5 and the
upright members 4. Spaced rearwardly of the
mentality associated with said members, the
I front upright members t and completely within
screed being raised from >the road surface.
Figure 3A is a View taken about onthe :line
3A-3A of Figure 3, looking inthe ,direction of.
the main frame A is the sub-frame, generally de
noted F, the same being a part of the spreading
unit now to be particularly described in refer
the arrows, and illustrating ',‘ìc'ert'ain 'particular
ence to Figure 7.
The sub-_frame F is shown as having _vertical
Figure 3B is a sectional view Awith portions oi
channel members 1, suitably spaced within said
features of the vibrating means.`
main frame, and adapted to be fixed at the lowe‘.`
ends thereof to frame members 8, which may
20 generally be channel members similar to the up
the line 3B-3B of Figure 3.
right members 1, and the said frame members 8
Figure 4 is a fragmentary view taken about
and upright members are rigidly braced by means
on the line 4-4 of Figure 3, illustrating the sec
ofncross braces 9 and I il, whereby a sub-frame
tional strike-off plate «and rcertain adjusting
the same broken away, illustrating certain guide '
means for the weight means and taken about on
means for the‘ finishing unit.
F may generally be provided as a sort of de
pending frame from additional transverse girders
or channels I0 suitably fastened at their ends to
the longitudinal upper frame membersl 5, pre
Figure 3, and illustrating the adjusting instru
viously referred to in relation to Figure 1.
mentalities for the screed and the relationship of
At this point reference is made to Figures 8
the vibrating means to the same.
Figure 6 is a top view of the machine. illus 30 and 9 to indicate the structure of the sub-frame
in somewhat more clear detail, the said frame
trated in Figure l, generally diagrammatic in
members 8 being shown in these figures as having
its showing, and illustrating primarily the driv
engaged at their outer ends bearing portions I2.
ing instrumentalities for the respective-spread
Referring back again to Figure ’7, it will be seen
ing units and finishing units and the vconñgura- Y ~
35 that the frame members 8 are provided in pairs,
tion of the spreading unit.
` » l
whereby aligned bearings I2 are provided. The
Figure 7 is a sectional view taken about on the
vsub-frame F is formed in the manner above de
line 'I-‘l of Figure 6, and illustrating the novel
scribed in order to provide a framework for sup
spreading instrumentalities of thev spreading
porting- endless chain means i3 thereon, by
unit and certain adjusting'meansïtherefon
Figure 8 is a fragmentary view with certain 40 `means of suitable sprockets I4, the said sprockets
including bearing portions l5 adapted to rotate in
parts in section, of certain-of lthe instrumentali
Figure 5 is a sectional view, portions being
broken away, -taken about on the rline 5-5 of
ties of the spreading unit clearly s illustrating
certain novel features therein.
, -
« Figure 9 is a fragmentary> view taken about on
the line 9-9 of Figure 8, looking in the direction
of the arrows, and illustrating certain vdetails
of the spreading unit and the relationship of
lthe bearing members I2 amxed to the frame
members 8, the said sprocket members I4 adia
cent the upper and lower frame members 8 and
at opposite ends being drivably interconnected
machine'broken away,y the said view illustrating
by means of the chains I3, and the said respec
tive upper and lower sprockets at each end of
the frame F in »turn being interconnected by
means of shafts I6, the shaft Iii at one end of
the spreader frame or sub-frame F, extending
substantially above the transverse channel mem
ber Il) and being suitably carried in a bearing
certain of the spreading devices and the drive
means therefor, in conjunction with guide means
portion of a longitudinal bracing member I1,
reference being here made at this point to Fig
those details with -one another.
Figure l0 is a sectional view taken about on
the line Ill-_I0 of Figure 9, looking in the direc
tion of the arrows, with. certain lportions of the
Referring generally to Figure 1, the machine
to be described in this disclosure is shown as be
ing comprised of a main frame A supported on
55 ures 6 and 7, the said shaft -i'ô having nxed at
the outer'end thereof a suitable pulley I8 yadapted
to be driven in a manner to be described.
Referring again to Figures k8 and 9, it should be
aïsubgrade by means of theforms generally in
mentioned that the sprockets I4, adjacent the
dicated B by conventionalflanged wheels I adapt
ends of the upper and lower frame members 8,
ed to roll over theforms »and be guided thereby,
are adapted to coact with the chain members I3
thesaid main frame A having supported `therein
in a manner that is apparent to those skilled
the spreading unit C adjacent the front vof the
in the art, whereby, when driving force is trans
frame A and rearwardly of the said spreading
mitted to the said sprockets, the chains will be
unit a finishing unit D, the said spreading unit, 65 carried around the sub-frame F in a conven
finishing unit and machine being propelled and
' tional manner. The said chains i3, both the
the various units actuated by means of a power
upper and lower chains, are rotated lby the
plant E located substantially rabove the previously
.sprocket members I4 about'the frame F in timed
rmentioned finishing unit D..
70 relation for reasons that will be apparent as the
vReferring more . particularly to -- Figure 6,
>description of this machine progresses.
wherein is shown ‘the 4spreading .unit C, previous
The purpose of the endless chains `I3 will be
ly mentioned, the main frame A is shown as
apparent upon a consideration of Figure l0,
having girder members ' or channel. members
wherein are shown the spreading devices adapted
forming a substantially rectangular lower frame 7
portion, the `longitudinal members of the frame
f-tofbe actuated by the chains, and which include
»the paddle members I9 suitably ñxed' at the lower
.ends ofthe shafts 20. The said ' shafts . 20 arev
adapted to pass through certain pivotal connec
tions 2I of the said chains I3, whereby` the same
may be -driven by the chains duringthe travel
movement thereof, and at the same time, may be
adjusted relative to said chains in a manner that
is to be described.
Figure 9 shows that only certain of the vsaid
pivotal connections of the chains I3 are provided
Vwith the pivotal bearing members 2I, the said
`bearing members being hollow to provide a bear
mally provided in spreading devices operating in
one direction transversely of a subgrade, -
It vwill be apparent that the spacing of the
lpaddles I 9 permits the flow. of concrete aggregates
therebetween while spread thereby, and then
move past the same and directly to the oppositely
moving -paddles, whereby fthe latter will also
spread part of the mix and overcome the tendency
of the machine to shift in either direction inci
dent to stresses set up by action of the paddles
on the aggregates. This will facilitate a Arapid
spreading, since asthe machine moves forwardly,
ing portion for the shaft 20, as previously men
the paddles may be moved by the chains at an`
tioned, the ends of the additional links oi?y the
increasedvspeed as compared with a construction `
. chain being connected together by generally con
ventional pivotal means 22,
Referring again'to Figure 10, it will-be seen
that the paddle'shafts are provided at their upper ’
ends with crank members 23 formed> integrally
with-said shafts, and at substantially right angles
wherebyonly the frontvlap and paddles moved
, thereby. are `used to »accomplish the spreading
It is pointed out that the paddle members I9
are so actuated as `to spreadA certain portions of
a mass of concrete deposited .on ar subgrade,
therewith, and at the outer ends of said crank
transversely of said subgradewhereby pressure
members a further integral portion 24 is provided,
adapted to carry guide rollers- 25 thereon, adapted
forces, exerted on the sub-frame and consequent
ly on the main frame, are neutralized. The said
pressure forces, normally being. transferred to
the fianged machine supporting wheels I, and in
to coact with guide means 26 now to be described.
3 .
' The guide means'26 comprises a channel mem- '
ber of a formation generally following that of
turn, to the road forms B over which the sup
the chains _I 3, and formed 4substantially as shown
porting wheelsA I travel, it will .be seen that these
pressure forces are neutralized, since the oppo
site laps of the chain I3 proceed> in opposite
directions and bear the paddle »members or
in lFigure 10 with an up-turned lip 21 about its
~ inner periphery, whereby the roller members 25 J
may contact the same with rolling contact
during the travel of the` chains I3 around
the sprockets I4, carrying with them the shafts
20 upon whichvthe crank'arms 23 are provided,
the said guide means 26 being adapted to be
spreading devices I9 in opposite. directions..
The 'crank> members 23, on the spreading device '
shafts' 20, are provided to maintain the angular
relationship shown in Figure 9, of the respective
raised and lowered by suitable screw means 28 35 spreading devices I9, during their travel as car
ried by the chains I3. It is, of course, apparent
adapted to engage with ears or extensions 29
these spreading devices I9 may be fixed to
suitably fastened at the transverse extremities
the shafts 20 in any> desired angular relation
'of said guiding channel 26. The said screw means
ship therewith,v to effect the spreading operation
28- are carried in bearing portions 30 suitably `fixed
to the longitudinal channel members 5, previ
ously Vreferred to, collars 3| being provided on
said screw means. The screw means 28 are pro
desired. ~ The desirability of providing adjustable
spreading devices is obvious, since, under many
conditions, the depth to which the spreading‘de
vices are to penetrate into a mass of concrete
vided at their upper ends with beveled gears 32
being spread, thereby, must be different as the
adapted to coact with corresponding beveled gears
concrete is laid in increasing thickness upon the
33, suitably fastened on a transverse shaft 34, the 45 subgrade.
It is likewise desirable to drive lthese
said transverse shaft being carried` by the longi
adjusting means in a simple manner, and provide
tudinal. upper frame members 5 in bearing por
them of a simple form, and to carry thespread
v'tions 35 fastened thereto, at its outer ends, and _ ing devices and the chains and sprockets which
intermediate the said outer bearing portions 35 50 drive the same on a rigid framework tomore
are additional bearing means 36 onl extensions of
.effectively accomplish the spreading of concrete,
,the upright sub-frame members 1.
» or the like.
`Adjacent one end of the transverse shaft 34,
Referring now» to the ñnishing unit -D, previ
just referred to, a suitable crank’36a is provided,
ously mentioned in connection with the descrip
whereby raising and lowering movementl may be 55 tion of Figure 1, it’will be seen that vthe-said unit
' imparted to the guide means or channel member
is located and supported on the main frame A
rearwardly of the spreading unit C, just previ
ously described. The finishingy unit D is sup
ported on the main frame A in a manner whereby
` lowering the shafts 20 tov which the lsame are 60 the same maybe adjustable vertically in accord
ance- with necessary conditions, the said finish-v
' connected, the said shafts 20 being slidable in the
ing unit D comprising generally a rectangular
A bearing pivots 2| of the actuating chains I3, pre
upper` frame G, which includes longitudinal frame
viously mentioned.“
members 31 adjacent the longitudinal main frame
The paddle members I9, ladjacent the 1ower l
ends of the shafts 20, are fixed to said shafts at, 65 members 5, and transverse frame members 38
integrally connected with the said longitudinalV
an angle therewith, whereby when movement
members 31 at the ends thereof.
is imparted to the chains I3, the said paddles will
at this ,point is made to Figure 3,
be carried along with said chains, and move end
2li,A to thereby raise and lower the paddles or
spreading devices I9. The raising and lowering
of the spreading devices is effected b-y raising and
rwherein the transverse frame members> 38 are
lessly about the sprockets I4. The paddles, of
shown as being provided with rearwardly and
course,.are adapted’to Spread concrete or'the ~ forwardly projecting members 39. A,screed,`genlike, when the »said concrete is placed on a sub
`era'lly indicated H, is provided for the finishing
grade, and the »y purpose of providing „endless
unit D, the screed being madeup ofwsectional
chains _with paddles operating in opposite direc
-members 40, having hinge portions 4I 1 at. the
Ations is to neutralizethe shifting tendency nor k75 edges thereof, ythe vsaid hingeportionsfbeing <corn
members being formed 4substantially as .shown in
crank member 54a, an additional bearing mem
ber being provided in a plate 56, whereby the
Figure 3, with upwardly vextending edges 42 at the
front and rear edges of the` said screed 'members
`crank shaft 54 may be rotated in a manner to be
nected together by pins, the individual screedl
Adjacent the outer end of the crank Shaft 54
is provided a beveled gear-51 adapted to be ro
tated by means of another bevel geai- 58, the bevel
flanges ~43, adapted to beengaged by Supporting
gear 58 being in turn supported by mea-ns of a
adjusting bolts 44. >The said-adjusting bolts 44
drive shaft 59 engaged in bearing members .60 of
are vertical members and are provided at their
lower ends with threaded portions adapted to be ..10 the front and rear plate members 46 and 41, .the
the said
y thereto,
.42‘ in turn
said drive shaft 59 carrying at its outer end apul
engaged by nuts'45 having semi-circular faces.
ley 6i, adapted to be rotated therewith by drive
Upon Iconsideration of Figure 5, it Vwill be noted
means to be Idescribed later.
that the semicircular faces of the nuts above and
It will be seen that when the bevel gear 58 is ro
below the ñange portions 33 are opposed, whereby
a~ rocking bearingconnection is provided, it being 15 tated, similar motion will be transferred to the
crank shaft >54, and the crank portion thereof, .en
apparent that the flange portions 43 are fur
gaged with the slot 53 in the` weight 49, will Icause
nished with suitably reamed out openings. to be
the said weight to reciprocate angularly with re
, engaged by the supporting rods 44 andnuts 45.
spect to the screed member 4i), and impart there
The upper ends of .the supporting rods 44 are
similarly provided with _semicircular nut members 20 to angular movement, whereby the said >screed
>member 40 will be vibrated in a substantially
45 adapted to ‘be screwed onto threaded portions
downward and forward direction to thus transfer
of the supporting rods and into engagement with
to the concrete contacted by the said screed mem
the members 39, previously referred to, toprovide
bers 48, a compacting action.
upper supporting bearing members. Between the
Since the respective screed members 40 are
upper nuts45 and .the upper surface of member 25
integrally connected, the screed H, as a whole,
39. surmundìng the rods 44, .coil springs 44a, are .
will be moved in aunitary manner to impart the
furnished to facilitate the finishing action of the
compacting action over the surface of the road,
screed in a manner that will be ‘understood as the
description progresses.
c -
At this point, Figure `5 is referred to, to illus
trate a certain adjusted position` of Áthe intercon
nected screed members l40, by means of the sup
porting rods 44, just referred to, it being` well
to thus effectively accomplish the finishing _of thel
30 said road in a desirable manner.
The front transverse member 38 of the sup
porting frame G is provided adjacent .its lower
portion with .a iiange 62 depending therefrom,
adapted to' Support strike oiï members `6.3 more
known that under many conditionsa crowned
surface of a concrete road -is desirable, the same 35 particularly illustrated in Figure 4, whereby the
said members 63 may be adjusted relative to the
being possible of attainment by `a screed such as
frame member 38 by means of suitable nut and
that illustrated in the said Figure v5.
bolt means 64 engaging elongated slot lpprtions
The structure provided, heretofore described, is
65 of said strike-off plate members 5_3. As will be
thus seen to be essentially an adjustable swing
able structure, adapted to be reciprocated at a 40 readily understood, the strike-off, plate members
generally provide a single strike-off plate `in ef
high rate `of speed, by means of a novel form of
fective action, which plate may be adjustably dis
vibrating mechanism now to be described, and in
posed with respect to the desired crown of a Aroad
a novel manner. While only one of these vi
brating units is shown, it is apparent .that under
being finished by the machine under discussion.
plate member 41 similarly affixed to ysaid'screed
member and substantially yparallel with the first
properly disposed with respect to the longitudinal
frame members 31, adapted to contact with
certain conditions a plurality of the same may 45 Since the crown formation of Various roadways
may be desirably different, the reason for this
be provided affixed to the individual screed mem
adjustablefeature of the strike-off plate is readily
bers to operate the screed. .Referring more par
apparent. Since the strike-off plate is supported
ticularly to Figure 3 again, it is .seen that a vi
on the frame G, it will 'be noted that the vertical
brating member, generally denoted J, is :com
adjustment of the said frame G -will carry with
prised of a plate member 46 affixed at its lower
it the said strike-olf plate. The vertical adjust
edge to the upper surface of »one of "the ïscreed
ment is effected by means of screw members 'BE
members 40, in a conventional manner, aiid‘a rear
named plate member.
' ‘
An angularly inclined bottom member' 48 is
provided suitably connected at its rear edge’with
the rear plate member 41„ vand at its forward or
front edge to the upper' >surface of the screed
55 threaded portions therein, the said screw mem
bers 6B being in turn borne by projections 61, >the
said projections v(il »being suitably _fastened vto the
vmain frame A in any conventional manner, the
pairs of the adjusting screw members at opposite
member 48, the said angularlyinclined member 60 sides of the frame being adapted to be operated
in unison by means of shafts V68 carrying at their
48 providing a surface .over which a weight 4S,
ends suitable beveled gears »69 adapted tocoact
more clearly illustrated in'Figure 312i,- is adapted
with mating bevel gears ‘I8 keyed tothe screw
shafts 66, previously mentioned, the said shafts
rThe weight 49 is confined for travel movement
between flanges 50 suitably ñxed to the inclined 65 68 being carried on supports 1i, the said supports
member 48 and including tongues 5i adapted to ` being fastened to the main frame A in `any con
ventional manner.> In order .to move _the adjust
coact with corresponding grooves 52 of the said
able frame G as a unit, the adjusting shafts .68
weight 48, whereby‘the said weight may be moved
at each side of said frame are adapted to be oper
' in a manner to be described. rI'he weight 48 is
provided with a» transverse elongated slot 53 70 ated by means of a chain 12 connecting the `said
shafts E8 operatively, by means of gears fixed to
adapted to be engaged by the lower end> of a'crank
said shafts. ’A suitable drive gear 13 is supported
-member 54a, the said crank member 54a 1being
on a shaft 14 of _bearings 15, the said bearings ’i 5
carried by an angularly inclined plate -55 parallel
to be reciprocated.
being carried by transverse _frame members 1,6,
with the previously referred lto plate 48, the said
plate 56 providinga bearing fora portion of said 75 kthe said gea-r ‘I3 being driven by means of a belt
11, drivably connected with a pulley 18 operated:-
jacent the >upper end, ofthe drive shaft Iâ of said
by the motor or power plant E, throughV a shaft'.
It should be understood that lthe vibrating ac
19. In order to transfer power for reciprocating:
tion- of. the screed is effectedlongitudinally of
the weight 49 of the vibrating mechanism J, pre
viously referred to, apower shaft 80 driven from f. the -road1subgrade and'vof the materialbeing com
pacted, and-»as such, is yatan angle to the spread
the motor E, see Figure 1, is provided, and at its
_ing `action. effected by the spreading unit C, pre
outer end carries a pulley 8| adapted to operate
spreading unit.
a belt 82.
`seen that this belt 82 drives a pulley 83 suitably
ñxed to a vibrator drive shaft 84, the said vi
brator drive shaft 84 being carried by.v bearing
members 85a on the transverse members 38'of
ture of the construction ofthe spreading unit„is l
the advantage derived‘from being ableI to move
portions of _.a concrete mass intactwithout danger '
of separating the, ingredients of the mixture being'
the adjustable frame G, previously referred to.
The vibrator drive shaft 84 is provided with a pul
ley 85 adapted to operate a belt 86,'the said belt
_86 being preferablya V-belt, which belt 86- is
engaged with the pulley 6I of the vibrator'meche
. ,
viously referred to, Awhereby the stability of the
main frame ._A is maintained throughout lthe
spreading andl finishing action. A notablefea
Referring at this point to Figure 5, it will be
anism J, previously referred to.
Having -thus _described my invention, rwhat Ix'
claim as new. and desire to secure by Letters .Pat-`
ent o_f the United States, is:
1_. A _nnisningmacnine of tneçlass described, ^
To provide for the adjustment of the screed 20 in combination,_ a1 ymain frame, ‘a spreader unitvk
comprising _transverse endless belt type spreader
members 40 of the screed unit H, it is necessary
meansy including _ A_spreading> devices carried _by 4
to provide means for maintaining tightness of
spacedv frontv and.y rear belt laps,V said belt means>
the belt 86 for driving the vibrating device J, and
disposed "in aylplane ,above vthe spreading devices..
there is shown suitable belt tightening means
and the latterv being adaptedto spread a massof l.
generally indicated 81, of any conventional form,
concrete. vdeposited ¿on ,a Ysubgrade, supportingv
the said tightening means being seated adjacent
means, for. theendlessbelt means providing 'an
the .upper ends of the supporting rods -44 of the
uninterrupted 'passage space for the spread con- '_
screed members on a'projection of the member
39 engaged by said rods44.
creteto pass-¿between and from the spreading 4de
It willthus be apparent that a suitable drive 30 vices of» the frontlapof the belt means to _the
`spreading ' devices onf the rear lap ofthe belt
has been provided to actuate the vibrator unit J ,'
means', meanstoiactuate said ydevices so those- in
fronti»rear„mo,ve in opposite'dir‘ections
transversely `o`f .the isubgradepand relatively to
under all adjusted conditions of the screed H.A
The screed H may be in turn raised as a whole
by means of the raising of the frame 'G support
ing lthe said screen, through the instrumentalities
previously referred to, namely, the screw mem-'
.othe_r,.whe‘reby .the pressure forces exerted »
35 each
on said lframe?.during.the spreading_.operationare. partiallyneutralized, and. afflnishinjg u__nit
bersV 6,6 operated 'in the previously described
supported ,onfsaidgframa rearwardly _Q.I" said _first
It is, of course, believed clear> that the strike
off plate members *63 will be correspondinglyl
raised and lowered when the flnishingíunit'D is‘
namedïfunitllinclllding ascreed. andmea'ns' for.
40 imparting a‘ .reciprocatory _afngularf'movernent to.
saidÑ .screedvv longitudinally .of‘l the subgradej to
therebv'ßcmiiactjajmass of. Concrete .spreadbv
raised and lowered, as previouslydescribed~` The
Said spreader uniti; „ .
novel vibrating means effects a complete com
2. A iinishing maçninefcr the vclass described;
pacting action of the concrete being'operated-'on
in an entirely new manner.
Since previously the '
-vibrating action has either been effected in a"
manner parallel to the surface _of the material
wheel means, ,operating .means _onfsaid frame, a
being compacted, or in a vertical mannenthe vi
brating action effected by the finishing unit, just
described, will be seen to be a component of 'these
two: actions, and as such, combines the desirable
ñrst transverse _sub-frame adjacent the front of
said main framacÓmprising a, spreading unit`
vertically` _adjustable ‘relative thereto, including
endless belt spreading means, associated with vsaid'
qualities‘which each may have and eliminates
certain undesirable _reactions obtained in previous
in'combination, agmain' frame -m_ova_bl¢_e‘over a_
subgrade, wheel means_forsaid»frame, roadforms
on fthe subgradejforming'traclç members foi-'said
sub-frame, spreading devices voperable by said ‘belt
in 'opposite ` directions, i and .movable in a _plane
whollybelow the belt'so that the concretespread
The _main Aframe A may be driven or moved over
by 'front sprei'i'dingA devices may Apassl directly to
the road forms on the wheels l, by suitable chain
means 88, driven bysuitable gearing 89 operated
by the _motor E, the said gearing 89 effecting this
and be spread by rear spreading~ devices travel-l
ing. inan opposite directionQthe pressure forces’
tending to" shift the _wheels and thereby misalign
operation by means of a transverse shaft 90, suit' 60
ably carried in bearing members 9i on the main
frame A, the saidshaft 90 including gears 92 at
its outerends for engagement with the chains 88,
the chains 88 in turn being engaged with gears
93 suitably keyed to the Wheelsllppûrting shaft
94, -whereby the machine may be operated. j
the roadfdrmsfbeing partially neutralized by the
pressurefforçesexerted _in opposite directions by
the rspreading >devices _during the spreading op
erations, _and >a __second`~ïsub-frame _rearwardly of
said first mentioned ,sub-frame, said second__subf
frame> including means „for vertically _adjusting
the 'same and comprising a finishing unit having
It is understood that the drive for. the spread.-`
a _screedmember,___and__a' strike-off plate, said
ing unit C is .effected by means of a shaft _95
strike-off 1plate operable to level_`a mass ofl con
driven by the power'plant E, and the said shaft » crete_`_.spre_ad__ by saidspreading unit', and said
95`is -provided at its outer end. with ,a bevel vgear 70 screed member including .means'for imparting~ _a
98 adapted to coact with a bevel gear 91 on La
shaft 98,.the said shaft turn having Ien-4 _
~reciprocatcryfvibrating movement _to the _same
_gaged near its lower end, a pulley 99. v.The pulley
9.9v isV adapted to operate .a belt lili), the said belt
longitudinally of the'subgrade whereby the prese'
>surewforces'- exerted onthe main frame andthe
wheels >areat substantially -right -angles Ato, the
_|08 _in turn being carried by the pulley ,I8 _ade
75 partially ‘neutralized `pressure forces _ exerted on
ì 251.374, Öàä
sais frame and vlfnëels
’said spreading finit;
the said frame and wheels thereby reiil'äirlinë a
Substantially stabiliii'ed cèñdïìtìoñ;
spaée between them in the direction-of forward
niòvêment' of the machine and through Which
spaéè portions of the mass may pass directly fronl'
the front members rearwardly to the rear mem* i
bers, and guidé means for said spreaderv mem:
bers separate from said endless chains adapted
to maintain the members in a predetermined an: f
gular relationship with respect to said chains,
said mounting means being disposed in a plane
10 whollyv above the spreader members.
’1. A- machine as claimed in claim 6, wherein
the guide means is vertically' adjustable to raise
and lower the paddle spreader members.
direction of forward bibi/‘ement of die machine
8. In a finishing machine of the class described,
and through which space portions of the Íñâss 15 in combination, a frame, drive means on='said
may pass directly from tile ‘from devices rear
wardly to ‘the fear devices, whereby pressure
forces exerted on the frame te?dîñ'g‘ to' shift the
sai/fie' are partially' ‘rieutialiäed 'dering the 'spread
me‘operationi the spacing of sail; first nienile‘rled
spreading devieesbeibg suon that part of the
frame, endless ehains' associated with said means,
spaced iront and rear paddle spreader members'
movable by said chains iil opposite directions for
spreading concrete o‘r the like, 'pressure' forces
exerted on the frame by the spreader members
movingr in 'one direction being partially neu;
tralized' b`y the 'pressure forces exerted 'on the
ma‘ss‘òf concrete deposited adjacent thereto may
frame by the members movingr in the other di
new between and past the _saine diiëetlir to ‘the
rection during the spreading operation, mount-‘
said other spreading' »devices and be spread
25 ing means wholly above and for supporting the
front 'and rear spreading members providing a'
» ii. Iii s'iinisriing'v?iacbihe 'of trie-blass describen,
space between them in the direction of forward
in ëonibiiiaijlbn, a frame-endless lbelt type spread
movement 'of the machine and through which
a mass bf
space portions of the m‘ass may pass directly from
spliced _abi-ift spreading' devises ïoperablebili said 30 the front members rearwardly to the rear 'melil
b‘erst andguide means for said spreader mem=
chains iii one direction, aile 'opties spreading ses
bers separateV from said endless chains adapted
vlees operable iii an opposite direction, mounting
means vv'liellgrl above and ’for supporting 'the frçiiit
spreading devices >bietil-lifig a space be;
to maintain the members in a predetermined-
tween there iii the direction br'föfwam more
nient of thel machine and tn'r‘oujgn which 'space
portions of the :nass ‘intr pass directly 'fr_bïfitiië
said mounting -m'ear'l's being disposed in a, plane
freni _sevices rearwardly yto die rearbeifices,
ported in pivots of'the endless chains, the said
shafts engaged with the guide means by crank
whereby ñressüre forces tending lto stift ‘trie
frame in either anbei-,ieri 'ailing ,thet spreading
(iteration "are partially ñëu ‘falaz a, me sessies
angular-_relationship with `respect to said chainsì
wholly above the spreader members, the paddle
spreader members including shafts slidablil‘r sup-‘4
¿o portionsi and the guide means being vertically ad- _
of sala n‘?si iiië'fitiónèa 'spreading de" y«ses _being
justaible to raise and lower the spreader members
with 'respect to the chains and concrete or the
like being spread.
such that part of the mass ôï êo?l” ete Being
spread ’may new between año past tn'
9. The combination of a iinishing machine `of
45 the class 'described having a main framei track
be spread lbil said other spreading devices. „
engaging wheels supporting the same for 'travel
5. ni a ‘niilsliiîië machine 'of 'the class desselben,
movement over a subgrade, and road forms on
in ebrfibiriatibn, affamé, endless belt
ing means 'for spreading s hiess of sentirete, asso
the subgrade comprising tracks for engagement
portions of said mass
frame, including endless chains spaced above and.
carrying spaced front and rear spreader members
eiàted therewitneolñp?lsing‘ frontend 'rear de
by the wheels aioresaid, and transverse endless
vices for siiecèssivèly acting on and spreading 50 belt type' spreading means supported by the
oppositen directions,
mounting ‘means wholly above aria rdf 'support
in opposite directions, for spreading concrete de-,
posited on the súb'gr'ade, transversely thereof,_.a
forward movement of 'therì?achi'r‘ie and thì‘öüäh 55 part of the concrete deposited adjacent the
whiöh space portions ô'i the mass ñiáíj pass di
spreader `'lífleílìbers moving in one direction flow
iiig therebetween and past the same being spread
rectly from the fi‘öht dellièe's reârwàrdlir tó the
by the spreader members Íno'vilflg in the lòlI/hel‘
rear devices, and a 'sìilglè „çoiìtirìiiîlìls eñdl'es's
dîi‘ëctìòïl, the pressure forces exerted Oñ the
drive meafis engaged with said dèvîëës
ly above mesi“ whereby me pressure
eir 60 freine by the opposltely 'moving spreader mein
bërs being substantially equalized whereby trans
ei‘ted on said >-fraín‘e by 'said devices dllifiñâ the
- spreading operation -are partially nèììtï‘äl'iäed.
versè’shifting of the wheels andròad fòr?r'ls'is
obviateä, _mounting means for supporting the
e. In a 'iinislii'ng machine ¿if _the class described,
front and rear spreading members providing a
in bbñib'iilatibfiì ¿i freine, vdrive
on said
späëë between them through which p'öî’tiöiis of
denis, endless ènàlns assotìatèo with seid means,
viding a 'space bètweeil‘thèiñ i'fl the dìi‘ëe't'l‘òñ _of
spaced from and rear' pedale spreader members
movable by said chains ‘in lippesiië directions "for
spreading 'concrete of tbe like, pressure forces
exerted en tbe frame by ilièjsprèadër members
moving 'ifi one directies _being partially 'i‘ijeu- `
@rallied by‘the p‘fëssiire forces exerted bfi die
ffäiiie mi ’alle members _moving iii me einer ai
the msssl'i'iay pass 4eiiecinf from the front niem
?earwardly to 4the rear members.
10. The' combination of a finishing machine òf
thè Class described i?lclìldîh‘g a I'?àìn frame, ti‘aòk
engaging wheels Supporting the sa?nè foi’ travel
sibvemenioter a subgr‘afle, means for eireetirjis
fëeiibii diri-ieg tbs spreading ¿iper-ation, ‘flibust
said travel movement, and I‘Óa'd fòrÍnS _on the
S’úbg'?àd'e having' track pò?tiO?S thereon ¿_fdi‘ “elle
ibg ineens wholly [email protected] 'año för succombe the
ssgeiiiefit by said wheels, endless beitk type
spreading means including endless chaiñs Ó'al‘ì‘y
' 2,374,025
ing spaced front and rear spreader members mov
able in opposite directions, supported by said
framey mounting means for supporting the front
angle to the direction of movement of the ma
. chine during their spreading operation.
12. In a ñnishìng machine of the class de
and rear spreading members providing a space
l scribed, in combination,> a frame, means to move
between them through which portions of the mass
may pass directly from the front members rear
said frame forwardly, spreading means _carried
by the frame including _front and rear spaced
apart spreading devices for spreading a mass of
Wardly to the rear members, the said spreader ,
members adapted toi spread concrete “or the like
deposited on the subgrade in opposite directions
concrete deposited on a subgrade, the spaces be-r
tween said front and rear devices being suiîì
whereby during travel movement of the machine 10 ciently unobstructed such that at least part of
part of the concrete deposited on the subgrade
the mass of concrete so deposited will pass from
will flow between and past the spreader'members
advanced portions of said devices between the
moving in one direction and be spread by the
devices and past the opposite portions thereof
members moving in the opposite direction.
during the forward movement of the frame and
11. In a finishing machine for concrete pave 15 spreading operation, and means connecting the
ment construction, in combination, a support, "
spreading devices to the Vframe located so as to ,
drive mechanism for advancing the support over
provide the unobstructed spaces'between front
a subgrade upon which concrete aggregates are
' and rear such members.
deposited to form the pavement, spreading mech- .
13. In a finishing machine of the class de
anism comprising a series of separate front and 20 scribed, in combination, a support, means to move
rear spreader members spaced apart from each
other to enable the aggregate materials to pass
the front spreader members to the opposite rear
spreader members, means above the spreader
the support forwardly, spreading means associ
ated with the, support including spaced front and
' rear >paddle spreader members for spreading a
mass of concrete deposited on a subgrade, the
4members connecting the spreader members to
space between said members beingv such that at
Ithe support such that the spaces between the
spreader members are unobstructed su?ñciently
«that the aggregates being spread may pass into
yand through the spaces aforesaid as the mem
bers spread the aggregates during the"forward 30
least a vportion of the mass of concrete deposited
onthe subgrade will pass from advanced mem
bers to the rear members through the said space
between the same, and past the said members,
and means connecting the spreadingdevices to
. movement of .the machine, and means for mov
,the frame located so as to provide the unob
ing the front Spreader members in one direction
and the rear spreader members in an opposite
direction and al1 the spreader members at an
structed spaces between front and rear such
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