发明名称 Apparatus and method for installing gutter drops on rain gutters
摘要 An apparatus and method wherein a punching tool is used to punch a downspout hole in the bottom wall of a rain gutter, and wherein a swaging tool is insertable into a gutter drop after the gutter drop is inserted into the downspout hole to swage-lock the gutter drop to the rain gutter.
申请公布号 US4711012(A) 申请公布日期 1987.12.08
申请号 US19810303510 申请日期 1981.09.18
申请人 J & L ASSOCIATES, INC. 发明人 WOLTERS, DONALD R.
分类号 B21D28/34;B21D39/06;B23P11/00;E04D13/068;(IPC1-7):B23P11/00 主分类号 B21D28/34
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