US2817275A - Machine for cutting road surfaces - Google Patents

Description

Filed Nov. 4, 1954 MACHINE E. A. LENKER' FOR CUTTING ,"ROAD URFAcEs 4 Sheets-Sheet 1 E. A. LENKER MACHINE FOR CUTTING ROAD- SURFACES Dec. 24, 1957 .4 Sheets-Sheet 2 Filed Npv. 4, 1954 INVENTOR W QM A-r'roRfi rs v Dec. 24, 1957 E. A. LENKER 2,817,275 MACHINE FOR CUTTING ROAD SURFACES Filed Nov. 4, 1954 4 Sheets-Sheet 3 INV T 4 2125 Qmmxrflw v ATTORNEYS .Dec. 24, 1957 E. A. LENKER 2,817,275 momma: FOR CUTTING ROAD SURFACES Filed 86v 4'. l 4 Sheets-Sheet 4 INVENTOR ##OQM ATTORNEYS This invention relates .to .a machine. for cutting road surfacesin order .to prepare them for suitable repairs. al-

though it can beused alsoas aisimple, planer for smoothing off irregularities if so desired. ,However, the main "features ofthe invention are. related to the preparation .of damagedportions of :so-called blacktop roads whereby repairs can be etfectedhaving neat joints with the undamaged portions and also with the repaired surfaces conforming smoothly to the curvature, inclination or configuration of the original road.

The principal-object of theinvention is -to .pr.ovid e a machine by means of which a hole in the road or an irregularity in .theroad can be Clltf'OlltqtO provide clean edges into which-the patchingmaterialcanbe placed and brought to contour with the balance of the road. In

much of the a road repair work required today'it =is-necessarythan the cavity be-prepared so that its bottom inclinesor tapers toward the good" surface of the=roaid=while a-tthe same' tirneallofthe deeper portions of the cavity are provided with the clean edges already referred to. My invention has for its object the preparation of such cavities.

A further object of my invention is to provide a machine of the character described which is of relatively small size and correspondingly light weight so that it can be readily transported, easily maneuvered in service by a single man and inexpensively operated and maintained.

Still another object of the invention is to provide very simple mechanism for accomplishing the results desired, which mechanism can be quickly adjusted to suit the requirements of any individual job.

How the foregoing objects, together with such other objects as may appear hereinafter or are incident to my invention, are attained is illustrated in preferred form in the accompanying drawings wherein Figure 1 is a side elevation of my improved machine;

Figure 2 is a plan view of Figure 1;

Figure 3 is a vertical section taken as indicated by the line 3--3 on Figure 1;

Figure 4 is a diagrammatic front elevation of the principal features of construction but omitting the engine and driving mechanisms for the sake of greater clarity. In this view the frame members of the machine are shown in the relative positions they will occupy in order to prepare a cavity for the reception of repair material; and

Figure 5 is a diagrammatic side elevation of the structure shown in Figure 4.

As will be seen by an inspection of the drawings, the principal structural features of my improved machine are as follows:

(1) A main frame MF composed of an open boxlike section 5 and a forward U or channel shaped section 6 which is pivoted or jointed to the section 5 by means of a pair of oppositely disposed bolts 7. The extension 6 of this main frame is provided with a pair of front wheels 8 mounted upon axes 9 around which the rear end pf the section 6 can swing slightly as the joint 7 is raised 2,8 l ?,2 7 5 Patented Dec. 24511 957 or lowered ;in accordance with the description to follow.

5 gear; the, section 5 of the mainframe is provided ;with.the

"operating handlebar 12 by means of which the operator maneuvers'the machine. At the forward end a. scissors toggle 13 .reactsbetween the front member 6a of the ,forward extension'and a t ansverse channel v5a ofthe gear or box-section of the .mainframe. This scissors toggle can be extended or contracted by-means =of azscrew member. 14. operated .bya wheel 15 in a manner well understood in this-art, there beinga block 16 which-moves along heithread 14 as the wheel 15 is turned. The forjwardvmembers of the scissorsare mounted to pivot around v a pin .17 and the rear members around a pivot .18 in order to accommodate changes in angular relationships between-the; partsas the screw isexpanded -or contracted. When the scissors is .contracted the forward portion'6a of rthB GXtCHSiOH 6 will, of course, be raised and the jointed or pivoted portion '7 will be lowered,.the side :arms 6 of the forward extension swinging on the axes 9 as already mentioned.

(2) An inner open .box-liket-frame IF-which is trunnionedon-the transverse members 55a and 5b of :theouter frame upon fore and aft,pins,19, whereby the innerframe can be tiltedlaterally or .side-wise iwith'respect'to the inner. -frame,.such'tilting being providedifor by meansof .anot-her scissors toggle 20 which'reacts between the-upper ,this'=end suitable inwardly projecting brackets 22-on .the

.member Sc'and outwardly projecting brackets 52310Ilth6 member 21 are provided. The scissors toggle 20 is operated by the screw bolt 24. The pillow blocks 25 and 26 ride along the screw and the pillow block 26 abuts against the stop 27. The screw projects rearwardly and is provided with a handle 24a by means of which it can be turned to effect the required adjustment.

As will be seen the forward portion 28 of the inner frame projects forwardly to a point slightly beyond the joints 7 of the main frame. Between suitable bracket members 29 is trunnioned a cutting cylinder 30, the members 29 and the cylinder 30 being carried by the forward lower corners of the inner box-like frame. Toward the rear a power device, preferably a gasoline driven motor 31, is carried by the inner frame upon a pair of cross members 32. At a point between the engine and the cutting cylinder a counter-shaft 33 is also mounted in the side members of the inner frame, on each end of which is a driving pinion 34. Similar driving pinions 35 are provided on each end of the cutting cylinder axis, all of said pinions being secured to the shafts upon which they are mounted. A chain 36 drivingly connects the corresponding pinions at each end of the cutting cylinder. The counter-shaft 33 is also provided with a large gear 37 which is chain driven by means of the chain 38 actuated by the gear 39 on the crankshaft of the engine. A clutch mechanism 40 operated by a clutch handle 41 is provided for connecting the engine to the driving mechanism. As will be noted, the engine, the cutting cylinder and all of the driving parts which connect the two are carried on the inner frame IF so that they all tilt with the frame when the frame is rocked on its trunnions 19 so as to change the angular relation of the cutting cylinder 30 with respect to the surface of the road.

The functioning of the machine is probably best illustrated in the diagrammatic views of Figures 4 and 5. In these views the road surface appears at R. At the point where repairs are needed which require cutting the surface to form a suitable cavity for reception of the repair material, it will be assumed that the edge 42 marks the point where a hole has developed. This point should be cut to a clean edge and the bottom should be inclined as at 43 so that whenthe cavity is ready for reception of the repair material it will slope upwardly from the cut at 42 to the normal surface of the road at 44. There are, of course, situations where just the opposite tilt will be required or even where both ends of the cutting cylinder are projected downwardly into the surface of the road to make clean edges at both sides. However, I have found that inmost instances a tapered cut will generally suflice and naturally such a cut will save a considerable amount of repair material. The machine is pushed along much in the manner of a lawn mower and the angular position of the cutting cylinder 30 can be quickly changed by the operator through the medium of the scissors toggle 20 and the handle 24a. The elevation of the cutting cylinder 30 can be quickly and easily adjusted by means of the scissors toggle 13 at the forward end of the machine. Through the medium of the two toggles any desired cylinder level and inclination can-be quickly established and when the cutting cylinder --is rotated the teeth 30a thereon will chew away the surface quickly and accurately and in far less time than has been possible with any machine or manual operation with which I am presently familiar.

I claim: 1

1. A machine for cutting road surfaces comprising a main frame, a wheel at each side of said main frame secured thereto in axial alignment at a point behind the'forward end thereof; a forward extension frame, a wheel at each side of said extension frame secured thereto in axial alignment at a point in front of the rear end thereof; said frames being pivotally jointed together at a point between the axes of said wheels; each of said frames being adapted to swing around/the axis of its wheels and said pivoted joint being adapted to move upwardly and downwardly during such swinging movement of the frames; means for effecting such upward and downward movements; an inner frame trunnioned on the main frame to rock laterally with respect thereto; a cutting cylinder rotatably carried by the inner frame upon an axis which extends transversely of the machine; means for transversely rocking the inner frame on its trunnion mounting whereby to alter the angular relation of the cutting cylinder to the surface of the road; and power means for rotating the cutting cylinder.

2. A machine for cutting road surfaces comprising an outer frame mounted on front and rear wheels, said frame having a front section and a rear section pivotally jointed together at a point between the front and the rear wheels, means for lowering or raising said joint, an inner frame carried by and trunnioned on one section of the main frame for lateral tilting movement with respect to the main frame, a transversely arranged cutting cylinder rotatably carried by the inner frame in the vicinity of said joint, means reacting between the two frames for tilting the inner frame whereby to alter the angular relation of the cutting cylinder to the surface of the road and power means for rotating the cutting cylinder.

3. A machine according to claim 2 wherein the power means is carried by the inner frame so as to move therewith.

4. A machine according to claim 3 wherein the power means for driving the cylinder includes a chain and sprocket drive at each end of the cutting cylinder.

References Cited in the file of this patent UNITED STATES PATENTS 4 De Camp Jan. 3, 1922 2,402,976 Olson July 2, 1946 2,510,817 Greiner et al. June 6, 1950 2,539,174 Baideme et al. Jan. 23, 1951

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