Pivoted ejector with hinged door for earthmoving scrapers

In a self-loading scraper having a frame, a bowl supported on said frame and having spaced side walls defining an open front and an open bottom, a cutting blade extending between said side walls and carried on said bowl forward of said open bottom, wheels on said frame, means for raising and lowering the forward part of said bowl to engage or disengage said cutting blade with a layer of soil and a movable bottom on said bowl covering said open bottom and being movable to an open position to dump the soil collected in said bowl, said bottom comprising a first platform and a second platform which platforms when aligned in the closed position lie in a common substantially horizontal plane, means mounting the first platform such that the weight of a portion of the contents in the bowl bearing on said first platform aids in moving both the first and second platforms from the closed to the open position, said means comprising first pivot means carried by the bowl and being connected to said first platform at a forward location on said first platform, said first pivot means being located in a horizontal plane spaced a short distance above said common substantially horizontal plane, whereby said first platform is pivotally mounted offcenter, second pivot means carried by said bowl and being connected to said second platform, said second pivot means being located in a horizontal plane spaced above said common substantially horizontal plane a distance several orders of magnitude greater than the distance between said common substantially horizontal plane and said horizontal plane containing said first pivot means, first link means pivotally connected to said first platform at a rearward location on said first platform, said location of said pivotal connection of said first link means being remote from said first pivot means on said first platform and on the opposite side of the midportion of the first platform from said first pivot means, second link means fixedly attached to said second platform in the vicinity of said second pivot means, said first and second link means being pivotally connected together, and power means mounted on the frame and connected to said second link means whereby actuation of said power means creates a force on the links which when added to the force created by the weight of a portion of the contents of the bowl bearing on the offcenter mounted first platform is sufficient to pivot the first link and first platform downward and out of supporting relationship with said portion of the contents and simultaneously pivot the second link means and the second platform about the second pivot means to pivot the second platform in an arcuate path out of supporting relationship with the remaining contents of the bowl.