Patent ID: 10173245

Abstract:
The two-stage soil sifting device comprises a support frame, an upper sifter, and a lower sifter. The support frame comprises a rectangular base with cross braces and four vertical uprights that support the upper sifter and the lower sifter at elevated positions. The upper sifter comprises an upper sifter frame and a first mesh having a first mesh spacing. The upper sifter is located above the lower sifter and may be pivotally inclined with respect to horizontal. The lower sifter comprises a lower sifter frame and a second mesh having a second mesh spacing. As unsifted soil placed upon the upper sifter is moved over the surface of the upper sifter some of it passed through the first mesh onto the lower sifter and then through the second mesh onto the ground, leaving debris on the first mesh and on the second mesh.