Concrete pole to be connected with a wood pole and method of replacing the lower part of the wood pole with the concrete pole
AssigneeNippon Concrete Industries Co. Ltd.
InventorYoshikiyo Fukushima
Life of this patent
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Abstract
This invention relates to a concrete pole having a reinforcing band and a cylindrical projection, protruding upward, at the outer periphery of the upper end, and a method of replacing the lower part of a wood pole with the said concrete pole. In order to replace the lower part of a wood pole, the lower part is first cut away from the upper part of the wood pole in use, and pulled out of the ground. Subsequently, the concrete pole is driven instead of the removed lower wood pole. Thereafter, the lower end of the upper wood pole is inserted into the cylindrical projection so as to be integrally connected with the concrete pole.
Claims4
A means for connecting a round concrete pole to a second pole comprising:
- a concrete pole;
- a cylindrical metal connecting tube, one end of said connecting tube telescoped over one end of said concrete pole;
- a first metal plate within said connecting tube and integral therewith, the flat surfaces of said first plate transverse to the longitudinal axis of said connecting tube, said first metal plate positioned against said pole end, the contiguous surfaces of said concrete pole and said connecting tube being integral by the process of molding said concrete within said connecting tube;
- a second circular plate at the other end of said concrete pole;
- headed bolts with nuts extending through said concrete between said first and said second plates to compress said concrete pole between said plates;
- and
- the other end of said connecting tube being open to receive said second pole.
Dependencies are inferred from the claim text.