| 摘要 |
1486724 Earth-moving bowl type scrapers CATERPILLAR TRACTOR CO 20 Jan 1975 [31 Jan 1974] 2444/75 Heading E1F The jamming of rock spillage from the bowl 15 of a tractor-towed bowl scraper between the draft arms 14 and the sides 23 of the bowl 15 is prevented by securing directly or indirectly to each of the draft arms a guard means 17 that has an inner edge 22 spaced from the adjacent side wall 23 a distance d that is less than, preferably less than a half, the distance D between the draft arm 14 and the side wall 23. The guard means preferably comprises a flat plate 18 extending the length of the draft arm and provided with elongated slots 21 that allow of it being secured by bolts 20 to the arm 14 or to a block 19 secured to and extending along the arm so that it may, when it is so desired, be laterally adjusted with respect to the arm. |
