发明名称 Utility box construction and ring therefor
摘要 Utility box construction having an enclosure formed of concrete with an opening in its top side. A ring-like protective cap formed of plastic is mounted in the concrete enclosure and circumscribes the opening. The ring-like cap has a side wall, a continuous outwardly extending rim formed integral with the upper extremity of the side wall and a continuous inwardly extending rim formed integral with the lower extremity of the side wall. The side wall has formed integral therewith vertically extending spaced apart rib portions which are tapered inwardly into the opening as they extend downwardly. The inwardly extending rim having vertically extending horizontally disposed rib portions in alignment with the rib portions on the side walls. An upstanding lip is formed integral with the inwardly extending rim. The upstanding lip extends parallel to but is spaced from the side wall.
申请公布号 US4863059(A) 申请公布日期 1989.09.05
申请号 US19880204875 申请日期 1988.06.10
申请人 CHRISTY CONCRETE PRODUCTS, INC. 发明人 CHRISTENSEN, THOMAS E.
分类号 B65D43/04;E02D29/12;E04F19/08 主分类号 B65D43/04
代理机构 代理人
主权项
地址