Patent ID: 7584805

Claim:
A box scraper comprising a modified box having two parallel sides, a left side wall and a right side wall, an open top and an open bottom and a connecting element, a front top beam, said front top beam being affixed to said right and left side walls at the upper, inner aspects of said side walls, forming thus, at the topmost level, a partial closure of an otherwise open face situated between a front edge of each of said parallel sides, and open in a continuum with said open bottom of said box, a complete rear-wall comprising: a rear top beam, said rear top beam being affixed to said right and left side walls at the uppermost corners of said side walls, and a moldboard assembly, said moldboard assembly ending below in a cutting edge, said moldboard assembly having a lock-end and a hinge-end whereby said moldboard assembly is attached to one of said side walls by a hinge assembly connected to said hinge-end and said moldboard assembly being attached at said lock-end to the other of said side walls by a lock mechanism, and, by virtue of said hinge assembly and said lock mechanism, said moldboard assembly being made capable of swinging back from said side wall attached to said lock-end of said moldboard assembly, thus creating an opening between said side wall attached to said lock-end of said moldboard assembly and said moldboard assembly, operating means by which said lock mechanism can be opened or closed, second operating means by which said lock-end of said moldboard assembly can be selectively moved rearward from said side wall attached to said lock end of said moldboard assembly, or brought back into approximation with said side wall attached to said lock end of said moldboard assembly.