| 摘要 |
PCT No. PCT/US80/01196 Sec. 371 Date Sep. 12, 1980 Sec. 102(e) Date Sep. 12, 1980 PCT Filed Sep. 12, 1980 PCT Pub. No. WO82/01021 PCT Pub. Date Apr. 1, 1982.A scraper bowl structure (11) for use in a scraper vehicle (10) having a rear wheeled support (12) and a wheeled tractive unit (15). The bowl structure (11) is defined by sidewalls (16,17) pivotally mounting a front apron (22) and a rear blade (25). Positioning devices (29,30) are associated with the apron (22) and blade (25), respectively, selectively positioning the apron (22) and blade (25) in raised and lowered positions. Spreader elements (19,20,21) for securing the sidewalls in spaced relationship further serve as supporting elements for supporting the blade (25) in the different dispositions thereof. The configuration of blade (25) is preselected so as to bulldoze earth forwardly onto the apron (22) in a lowered position of the blade (25) and apron (22).
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