| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete mixer equipped with ring members that are easy to work and can be formed inexpensively. SOLUTION: The mixer is equipped with two rotary shafts having blades that can knead a ready-mixed concrete. On the outer periphery of the rotary shafts a plurality of ring members for preventing the adherence of the concrete are freely fitted. Each ring member is formed by combining four flat bars 11A, 11B, 11C, 11D that are obtained by the bending work of making a flat strip into a semicircular shape. COPYRIGHT: (C)2009,JPO&INPIT
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