发明名称 Sifter
摘要 A hand tool for sifting soil in gardens, recovering buried articles and for other similar purposes where aggregate materials are to picked up and filtered to separate larger particles from smaller sized granules and powders. The device comprises essentially a "Y" shaped frame with the single end extended as a handle and with the forked end forming a triangular container open at the top with two sides similar, a straight, approximately flat blade supported at each end by the ends of the frame, the blade being the third side of the container, and a bottom planar surface perforated to allow the passage of materials. The tool can be made in different sizes and with different kinds of perforated surfaces, depending upon the purpose and size of particles to be retained.
申请公布号 US4988005(A) 申请公布日期 1991.01.29
申请号 US19900484253 申请日期 1990.02.26
申请人 GRAHAM, JOHN T. 发明人 GRAHAM, JOHN T.
分类号 B07B1/02 主分类号 B07B1/02
代理机构 代理人
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