发明名称 ELECTRICAL MUD BOX WITH REMOVABLE COVER
摘要 An electrical enclosure for use in poured concrete construction has a front opening that is closed by a removable cover that prevents poured concrete from entering the enclosure cavity. The cover is a knockout cover that is molded integrally with the enclosure and is attached to the enclosure peripheral wall by a frangible web.
申请公布号 CA2499175(C) 申请公布日期 2010.06.22
申请号 CA20052499175 申请日期 2005.03.01
申请人 THE LAMSON & SESSIONS CO. 发明人 HULL, ERIC G.
分类号 H02G3/08;H02G3/04;H02G3/12;H02G3/14 主分类号 H02G3/08
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