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Title:
COPPER-CLAD STEEL ROD FOR GROUND ELECTRODE
Document Type and Number:
Japanese Patent JP2003032872
Kind Code:
A
Abstract:

To provide a copper-clad steel rod for a ground electrode which can reduce a frictional resistance against soil while a lateral vibration phenomenon is avoided.

A steel core 9 is cladded with a copper or copper-alloy layer 8. One end of the steel core 9 is machined into a conical shape. A plurality of grooves 7 extended longitudinally are formed in the copper or copper-alloy layer 8. The depth of the groove 7 is, for instance, 1.0-5.0 mm. When a copper- clad steel rod 6 for a ground electrode is driven into a ground, the end machined into a conical shape is driven into the ground. When the copper-clad steel rod 6 for the earth electrode is driven into the ground to a part where the copper or copper-alloy layer 8 is formed, gaps are formed between the grooves 7 and the soil, so that a frictional resistance can be reduced significantly. As a result, a plurality of copper-clad steel rods for ground electrodes can be connected with each other and successively driven deep into the soil by a relatively small driving force. Further, as the gaps between the grooves 7 and the soil are not formed over the whole circumference of the copper-clad steel rod 6 for the ground electrode, a lateral vibration phenomenon is hardly produced, so that the rod can be driven into the ground with a high efficiency.


Inventors:
OHATA YOSUKE
Application Number:
JP2001000211645
Publication Date:
January 31, 2003
Filing Date:
July 12, 2001
Export Citation:
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Assignee:
FUJIKURA LTD
International Classes:
H02G7/00; H02G13/00; (IPC1-7): H02G13/00; H02G7/00
Attorney, Agent or Firm:
藤巻 正憲