초록 ▼

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 b

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.

대표청구항 ▼

An apparatus for producing cold mix asphalt from liquid asphaltic composition and aggregate received by the apparatus at an uncontrolled rate, comprising: a surge bin for receiving the aggregate; a pugmill; a conveyor operable to transport aggregate from the surge bin to the pugmill; conveyor drive

An apparatus for producing cold mix asphalt from liquid asphaltic composition and aggregate received by the apparatus at an uncontrolled rate, comprising: a surge bin for receiving the aggregate; a pugmill; a conveyor operable to transport aggregate from the surge bin to the pugmill; conveyor drive means for operating said conveyor at rates selectable to maintain the quantity of aggregate in the surge bin between selected high and low levels; a pump operable to deliver asphaltic composition to the pugmill; and pump drive means coupling the pump to the conveyor drive means for operating the pump at a rate proportional to the rate of operation of the conveyor.