US 3072391 A
Description (OCR text may contain errors)
Jan. 8, 1963 J. F. MODARRAHI 7 DISINTEGRATING MACHINE HAVING CUTTING AND IMPACT ACTION Filed June 21, 1960 2 Sheets-Sheet 1 INVENTOR. JAMES F. MhDARRAH fiigviah ATTORNEY Jan. 8, 1963 J. F. MCDARRAH 3,072,391
DISINTEGRATING MACHINE HAVING CUTTING AND IMPACT ACTION Filed June 21, 1960 2 Sheets-Sheet 2 DIRECTION OF MOVEMENT INVENTOR. JAMES F. M DARRAH ATTOR NEY United States Patent O 3,072,391 DISINTEGRATING MACHINE HAVING CUTTING AND IMPACT ACTHON James F. McDarrah, 5737 S. Whipple St., Chicago 29, Ill. Filed June 21, 1960, Ser. No. 37,787 1 Claim. (Cl. 26213) This invention relates generally to construction machinery and has particular reference to a machine for removing the wearing course of a pavement, such as the bituminous Wearing surface or the brick wearing course thereof.
One of the principal objects of this invention is to provide an improved machine for removing the wearing course of a pavement, such as a pavement which has a wearing surface of bituminous material or brick.
Another object is to provide a machine having a tool capable of applying both a cutting and an impact action for facilitating the removal of the wearing surface of a pavement.
Still another object is to provide a machine which is capable of readily removing concrete curbing from a pavement preparatory to widening the same if desired.
A still further object is to provide a machine capable of removing ice and compacted snow from airport runways, superhighways or the like.
Yet another object is to provide a structure which will remove both rigid and semi-rigid wearing courses from a pavement or the like, and which will convey the re moved material away from the machine.
A yet further object is to provide a structure for scarifying the surface of a pavement or the like, which structure is readily adjusted in position according to the thickness of the material to be removed.
Other objects and important features of the invention will be apparent from a study of the specification following taken with the drawings which together describe and illustrate a preferred embodiment of the invention and what is now considered to be the best mode of practicing the principles thereof. Other embodiments may be suggested to those having the benefit of the teachings herein, and such other embodiments are intended to be reserved especially as they fall within the scope and purview of the subjoined claim.
In the drawings:
FIG. 1 is an elevational view of construction equipment embodying a scarifying device according to the present invention;
FIG. 2 is a plan view of the scarifying device forming a part of the machine seen in FIG. 1, said view being to an enlarged scale and looking in the direction of the arrows 2-2 of FIG. 1;
FIG. 3 is an elevational view, certain parts being shown in section, of the scarifying device according to the present invention; and
FIG. 4 is an end view thereof showing the mode of operation in removing a wearing course from a pavement or the like.
Referring particularly to FIG. 1 of the drawings, the scarifying device and construction vehicle according to the present invention is referred to generally by the reference numeral 10, the scarifying device thereof being referred to generally by the reference numeral 15. The construction vehicle includes a frame 11, having ground engaging tractive wheels 12, 12 and steering wheels 13. The frame 11 supports a prime mover 14 which is connected to a suitable transmission, not shown, for supplying power to the tractive wheels 12. A drivers cab 16 is mounted on the frame 11, and a steering device 17 extends from the drivers cab 16 to position the wheels 13.
The scarifying device 15 according to the present invention includes a main support frame 18 suspended from links 19 whichar'e raised and lowered by power cylinders 21, 21 resting on the frame 11. Each power cylinder has a piston rod 22 which is connected to a toggle link 23 in turn connected to the link 19. The toggle links 23 are each pivoted at a midpoint thereon as at 24 to an abutment 26 supported on the frames 11.
A pair of vertically extending supporting members 27 extend from the underside of the support frame 18, and the lower ends thereof are provided with bearings 28 which support shaft 29 of a scarifier drum indicated generally by the reference numeral 30.
As seen in FIG. 3, the shaft 29 has a pair of spaced trunnions 31 thereon each of which is held fast to the shaft by a key '32. The spaced trunnions 31 have trunnion shafts 33 extending therebetween, each trunnion shaft 33 having a head 34 at one end thereof anda retainer nut 36 at the end thereof in threaded engagement with a threaded end 37 of the shaft 33 so as to hold the same in position on the trunnions 31.
Each of the trunnion shafts 33 has a plurality of cutter elements 38 supported thereon, and as seen in FIG. 3, the cutter elements 38 contact each other. Each of the cutter elements 38 is mounted to swing freely upon its trunnion shaft 33, and during rotation of the shaft 29, as seen in FIG. 4, the cutter elements eXtend substantially radially of the axis of rotation of the shaft 29. However, the cutter elements 38 are so designed to give both an impact and a cutting action to material 39 forming a wearing course of a pavement base course 40 which may be made of concrete or the like. The wearing course 39 may be semi-rigid bituminous material or in some cases a brick wearing surface. By reason of pivotally mounting each of the cutters 38 upon its trunnion shaft 33, it can yield as seen in the dotted line positions in FIG. 4. Yet the centrifugal force on each cutter element 38 is such that it adopts the radial solid line position shown to provide both a cutting and impact action.
Power is provided for turning the shaft 29 in the direction indicated in FIG. 4, and to this end there is shown a power take off shaft 41 from the prime mover 14, a flexible coupling 42 being connected in the power take off shaft 41. The power take off shaft 41 is connected to a bevelled gear 43 housed within a gear casing 44. The bevelled gear 43 meshes with a bevelled gear 46 which is fast upon the shaft 29 so as to drive the same.
The material which has been removed from the surface by means of the cutter elements 38 is thrown in a generally upward and forward direction, and as seen in FIGS. 1 and 2, the material which has been removed by cutter drum 30 is adapted to be removed by means of a conveyor 46 which is supported by hangers 47 and 48 from a shroud 49 suspended as seen in FIG. 1 from the main support frame 18 by means of members 51, 52 and 53.
The conveyor 46 seen in FIG. 2 is of an endless type such as a rubber belt, and includes a driving pulley 54 fast on a shaft 56 supported in the hangers 47 and 48. The other end of the conveyor 46 has an idler pulley, not shown, for reversing the reaches of the conveyor 46, and such idler pulley can likewise be suspended from hangers similar to the hangers 47 and 48.
Power for driving the endless conveyor 46 is supplied by a gear 57 fast on the power take off shaft 41 and meshing with a gear 58 fast on a shaft 59 having a sprocket 61 thereon. sprocket 61 and about a sprocket 63 fast on the shaft 56 driving the conveyor 46.
The direction of crowding movement of the machine 10 is indicated in FIG. 3, as is also the direction of rotation of the cutter drum 30. Each of the cutter elements A sprocket chain 62 is trained about the 38 has a cutting edge 38A and the end of each cutter 38 has a rake 3813 to afford clearance through the material being cut 39.
While the invention has been described in terms of a preferred embodiment thereof, its scope is intended to be limited only by the claim here appended.
In construction equipment, a vehicle including a main frame and tractive and steering means for moving and guiding said vehicle, a prime mover mounted on said frame, an auxiliary frame supported by said main frame including means for raising and lowering said auxiliary frame with respect to said main frame, scarifying means mounted on said auxiliary frame including a main drive shaft therefor, power take ofi means connected between said prime mover and said drive shaft, means spaced along said drive shaft and drivably connected thereto, a plurality of shafts extending between said last named means, closely spaced cutter members pivotally mounted on said last named shafts and normally extending radially from the turning axis of said driving shaft by the speed of rotation of said driving shaft, said cutter members being yieldable upon striking material to be scarified and being able to apply both impact and cutting action against said material, the direction of rotation of said driving shaft being such that the material being removed is directed generally forward and upward of said vehicle, a conveyor supported by said auxiliary frame and disposed in material receiving relationship with respect to said scarifying means for receiving such removed material and removing the same, said conveyor being adapted to be driven by said power take off means, and a defleeting shroud supported by said auxiliary frame and disposed between said scarifying means and said conveyor for deflecting the removed material on to said conveyor.
References Cited in the file of this patent UNITED STATES PATENTS 994,746 Haynes June 13, 1911 1,518,505 Gray Dec. 9, 1924 2,642,679 Zamboni June 23, 1953