发明名称 CONCRETE DRILL
摘要 PROBLEM TO BE SOLVED: To prevent the generation of a body transmission sound during boring by a hammer drill and to shorten a boring time by applying press force for assisting press force by an operator to a hand-held concrete drill. SOLUTION: In the concrete drill, a bit driving shaft 4 is rotated by a driving source 2 housed in a main body 1, and a diamond bit 5 is fitted to the tip of the shaft 4 protruded forward from the main body 1 to bore concrete, etc. An excitation apparatus 8 for applying excitation force along the shaft 4 whose strength pulsates and changes to the main body 1 is installed in the main body 1. COPYRIGHT: (C)2003,JPO
申请公布号 JP2003211436(A) 申请公布日期 2003.07.29
申请号 JP20020010739 申请日期 2002.01.18
申请人 MAX CO LTD 发明人 AGEHARA NORIMOTO;AKATSU MOTONARI;MURAKAMI NAOHIDE
分类号 B28D1/14;B25D11/00;B25D16/00;B28D7/00;(IPC1-7):B28D1/14 主分类号 B28D1/14
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