Patent ID: 7121486

Claim:
A crusher characterized by comprising: a bottomed cylindrical housing; a cover member for closing the upper end opening of said housing; a stationary plate housed in the upper end of the inside of the housing and held in close contact with the back of said cover member; a rotary plate housed in the upper portion of the inside of the housing below said stationary plate and underlying the stationary plate; a spindle for supporting said rotary plate in the housing rotatably on the axis of the housing, said spindle has its leading end protruded into a through hole formed in a substantially central portion of said stationary plate; rotating means for rotating said spindle in a predetermined direction; a plurality of guide slots formed generally radially in the stationary plate around said through hole and communicating with the through hole; a guide vane disc attached to the leading end of said spindle for rotating together with the spindle in the through hole; a plurality of small holes arranged in the surface portion of the rotary plate underlying said stationary plate, at a predetermined pitch and vertically through the rotary plate; stationary blades attached along one-side edges of the individual guide slots of the stationary plate located on the side to rotate the rotary plate by said rotating means, and raised at an inclination opposite from the rotating direction of the rotary plate, said stationary blades having their edges positioned close to the surface of the rotary plate; a plurality of band-shaped rotary blades attached to those surface portions of said rotary plate, which overlap the path of the stationary blades, and raised substantially radially at an inclination in the rotating direction of the rotary plate as to follow the arranged state of the stationary blades, said rotary blades having their edges positioned sufficiently close to the back of the stationary plate so as not to abut against the edges of said stationary blades; an exit disposed in the side wall front portion of the housing for delivering such crushed products to the outside of the housing as have fallen down into the lower space in the housing through the small holes arranged in the surface portion of said rotary plate; support means for supporting the housing in such a forward inclination on the ground or on the floor of a building that the housing side wall front portion having said exit is directed obliquely downward; and an entrance opened in a central portion of said cover member for delivering a raw material to be crushed, and delivers the raw material into the through hole of said stationary plate through the cover member.