发明名称 Mine roof expansion anchor and bail element
摘要 A bail element (10) having a medial portion (12) with a pair of legs (14, 16) extending integrally therefrom and a mechanical expansion anchor having a pair of shell halves (68, 70) and tapered plug (80) held in assembled relation by the bail. The bail legs are identical to one another and, prior to assembly with the shell halves and plug, have three distinct, linear portions (46, 48, 50) respectively extending at preferred angles of about 10 DEG , 36 DEG and 12.5 DEG with respect to lines parallel to the bail centerline (A-A). The bail medial portion includes a pair of upstanding portions shown in a first embodiment (34, 36) and a second embodiment (54, 56) for puncturing a resin cartridge which may be installed with the anchor.
申请公布号 ZA9301670(B) 申请公布日期 1993.10.06
申请号 ZA19930001670 申请日期 1993.03.09
申请人 THE EASTERN COMPANY 发明人 RAYMOND L WRIGHT;CARL A CLARK
分类号 E21D21/00 主分类号 E21D21/00
代理机构 代理人
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