| 摘要 |
PCT No. PCT/CA95/00639 Sec. 371 Date Jul. 22, 1996 Sec. 102(e) Date Jul. 22, 1996 PCT Filed Nov. 8, 1995 PCT Pub. No. WO96/23128 PCT Pub. Date Jan. 8, 1996The present invention consists of a mobile device that can be attached to the underside of existing mining machines thus eliminating the large number of ground levelling machines used in the mine, and increasing both air quality and worker productivity. This device, attached to the underside of a mining machine, making it possible to level areas that are inaccessible to conventional graders, and is specially designed for use in such places. Its low profile allows the invention to fit perfectly into the space available beneath such machines, in contrast to conventional equipment normally attached to graders, consisting of a vertical blade that is too large for the space between the front and rear wheels of a mining machine. Moreover, thanks to the positioning of its anchors, the invention adjusts automatically to ground conditions, in contrast to a vertical blade which must be adjusted regularly. Finally, the device requires no mechanical maintenance mad costs less than conventional graders. |
