Patent ID: 7766725

Claim:
A shot-blasting machine for cleaning work pieces, comprising: a frame; a cylindrical drum inclinably mounted on said frame such that said drum is rotated about the longitudinal axis thereof, said drum having a top opening, an opposite bottom wall, and an inner peripheral wall so as to define a chamber in which the work pieces are processed therebetween; a flapper for opening and closing said top opening of said drum; a device mounted on the inner surface of said flapper for impelling abrasive particles into said chamber; a bucket loader having an opening leading-end and closing leading-end and defining a loading chamber in which the work pieces are loaded; adjusting means for adjusting the degree of the opening of said leading end of said bucket loader; transferring means for reciprocatingly transferring said bucket loader in a path that includes a lower position in which the work pieces are loaded into said loading chamber of said bucket loader through said opened leading end, an intermittent step in which said bucket loader is upwardly moved when the leading end is closed, and an upper position in which said closed leading end of said bucket loader is opposed to said opened top opening of said drum; guide means for guiding said bucket loader when it reaches said upper position such that said bucket loader advances to and withdraws from said processing chamber of said drum through said top opening thereof with said leading end of said bucket loader being opposed to said bottom wall of said drum; and wherein said adjusting means opens said leading end of said inserted bucket loader in said processing chamber of said drum after said leading end accesses said bottom wall or said inner peripheral wall of said processing chamber, whereby said loaded work pieces in said bucket loader fall into said processing chamber of said drum.