Патент USA US2374025код для вставки
April 17, 1945( E. H. I_‘IcHTr-:NBERG ` -2,374,025 PAVEMENT FINISHING MACHINE Filed March 16, 1942 :66 4 Sheets-#Shee't 1 /// April 17, 1945 K E. H. LICHTENBERG _ 2,374,025 PAVEMENT FINISHING MACHINE ¿MX/ Awww/H01, April 17, 1945. E H. |_|C|-|TENBERG 2,374,025 PAVEMENT FINI SHING MACHINE Filed March ie, 1942 4 sheets-sheet s ` , /4 April 17, 1945. _ E. H.V|_|CHTENBÉRG 2,374,025 PAVEMENT FINISHING MACHINE Filed March 16, 1942- ` 35 4 Sheets-Sheet 4, ` ì 33 v Eg q . . ' 4 l i .==- _L ___ 3 _. 5l. q | ' *l s H 3/ :a i 5D ‘7 ~ 2.7 ï /a Z6 ï . Igll L _Il L ___________ __»Ä ‘ I iI| 1[/7' l e I _»z- î f| 1 ^^.~ j :/|\5á / | ' Il L 5/ il' . ,_.-__| | li?? 'ÍI v :I | l y | 1| I - . q Patented Apr.' 17,' 1945 y2,374,025 ' PAVEMENT FINISH‘ING MACHINE ' Erich H. Lichtenberg, Milwaukee, Wis., assignor „ _ to Koehring Company,' Milwaukee, Wis., a cor poration ` Application March is, 1942',l serial No. 434,963 (cwi-_46X 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, . said/subgrade. above generally referred» to, to be supported at> . , ß 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 y drive means for the same and a novel arrange . inwhìch the spreading devices are carried by posite directions transversely of thesubgrade ished. frame of the machine, and to the frame and " Aiurther‘object of this invention is to provide drawings. a novel arrangement of normally spaced spread- , ing devices and disposition thereof with .respect »" . ` - ^ . .‘ . . ~ Inzthe drawings: v ' 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' forms. _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 ' v ‘ .Figure 1 is a sideview of a machine of the tormoving means therefor, such as to permit a v ' 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 thereto. 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 adjacent ' 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' means mentioned..- 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 is.to Aprovide a machine comprising a ‘ ' > ` ' ~ Figure 2 is a view taken about on the liner-2 55 of Figure 1, looking inthe direction of the‘ar rows which illustrates the'arrangement‘of the 2,374,025 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. c 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 provided. - .. . . 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 2,374,025 »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 action. _ ., 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 that 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 frame members 31 at the ends thereof. is imparted to the chains I3, the said paddles will Reference 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 70 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 l 2,374,026 4 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 described. 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 40, rigidly the said connected 11p-turnedv y thereto, edgesinwardly .42‘ in turn extending 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. i 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 50 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 ‘ i 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 5.1 2,374,025, 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 l .' , . ' 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' spread., 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: ï 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 and.in.»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 manner. . . . i ’ l 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 50 _ _ ` , ' ' _' " _ " 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 devices; 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 65 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 98.in 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 6 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 söbieièii i?emeahsfor therewith, spreading collie‘rising` a mass bf endless böiicr'ete, chains, 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 thër'êlòr. , , . _ . ` _ means vv'liellgrl above and ’for supporting 'the frçiiit and 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' and 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 spread 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 Üîhöl 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 7 ' 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. s 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 members. ERICH H. LICH'I'ENBERG.