| 摘要 |
An apparatus to be towed behind a roadway planing machine to mix aggregate planed from a roadway into cold mix asphalt for repaving the roadway. The aggregate is introduced, via an inclined shaker screen, into a surge bin and conveyed from the surge bin to a pugmill on the chassis of the apparatus by a belt conveyor underlying the surge bin. The conveyor is driven through an electrically adjustable first variable transmission and manual and automatic controls are provided to adjust the speed ratio of the first transmission to maintain the level of aggregate in the surge bin between selected high and low levels. A pump is driven by the first variable transmission through a second variable transmission to select and fix the ratio of aggregate to asphaltic composition in the pugmill for varying rates of conveyor operation corresponding to different speed ratios of the first transmission. A crusher is provided to comminute large pieces of aggregate that gravitate off the lower end of the shaker screen and the comminuted aggregate is returned to the shaker screen via a belt conveyor that discharges onto a conveyor of the roadway planing machine that discharges onto the screen.
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