公开(公告)号：US3716649A

公开(公告)日：1973-02-13

申请号：US3716649D

申请日：1971-03-16

申请人： ALLEGHENY LUDLUM IND INC

发明人： WALKER R ,  SMITH G ,  BOYD G ,  STEVENS H

IPC分类号： H01R4/66 ,  H01R3/06

CPC分类号： H01R4/66 ,  Y10T16/39 ,  Y10T403/35 ,  Y10T403/5733

摘要： Described herein is an electrical grounding rod comprising a thin-walled tube of a corrosion resistant steel, a conductor tube of aluminum or other suitable electrically conductive material to provide a low resistance path to ground and a core of a plastictype filler within the inner tube, the core being sufficiently rigid to provide structural support to the thin-walled tube yet resistant enough to allow some bending of the rod to circumvent obstructions encountered in driving the rod into the ground. A driving point is provided to fit over one end of the rod to isolate the aluminum from the earth and to facilitate driving the rod into the ground. In an alternative embodiment an additional steel tube is provided within the conductor tube to form a threewall or ''''sandwich'''' composite.