发明名称 Filter wrench
摘要 A band or ring, split at one point in its circumference, forming end portions directed toward each other. A pair of handles are welded to the band, at the end portions, each at points distributed over substantial length of the band. The band is of work hardened steel, and knurled on its inner surface. The steel band is self-biased to an outer or enlarged size, and contractible to an inner or smaller size by squeezing on the handles, for gripping an object.
申请公布号 US4604920(A) 申请公布日期 1986.08.12
申请号 US19850743390 申请日期 1985.06.11
申请人 DUPKE, CONRAD E. 发明人 DUPKE, CONRAD E.
分类号 B25B9/02;B25B13/52;(IPC1-7):B25B13/46 主分类号 B25B9/02
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