发明名称 Hand drill level
摘要 A hand drill level is provided and consists of a mounting frame removably mountable to top surface of a shank portion of a hand drill and a vial that has a bubble chamber operably affixed within the mounting frame and parallel to a longitudinal axis of a drill bit to aid in drilling holes straight through a work piece.
申请公布号 US4656749(A) 申请公布日期 1987.04.14
申请号 US19860820974 申请日期 1986.01.22
申请人 ASHLEY, DONNIE L.;SPECTOR, GEORGE 发明人 ASHLEY, DONNIE L.;SPECTOR, GEORGE
分类号 B25F5/02;(IPC1-7):B23B45/00 主分类号 B25F5/02
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