发明名称 Powered joint forming device for concrete or the like
摘要 A powered jointer having a scoring undersurface for forming a stress joint in a wet concrete slab, followed by a reciprocating tamper foot which forms a stress joint while moving rock out of the joint and a smoothing tip following the formation of the stress joint for smoothing out the same, all in a single pass.
申请公布号 US4253816(A) 申请公布日期 1981.03.03
申请号 US19790065770 申请日期 1979.08.13
申请人 TOBIAS, LUTHER;BORIES, DAVID G. 发明人 TOBIAS, LUTHER;BORIES, DAVID G.
分类号 E01C19/40;E01C23/02;(IPC1-7):B28B1/04;B28B1/08;B29C23/00 主分类号 E01C19/40
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