Centrifugally cast pole and method
OwnerTom W. Waughinventor
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Abstract
A hollow, centrifugally cast, utility pole having tapered external linear dimensions is disclosed. The pole is formed utilizing conventional centrifugal casting methods wherein a tapered mold is used to impart a tapered shape to the pole. The use of the tapered mold during the casting operation also provides for a gradually increasing pole wall thickness along the entire length of the pole from the top of the pole to its butt. The pole can also be cast to provide for a press-fit, slip joint at the butt of the pole which allows the pole to be interconnected with other similarly cast poles for extended height.
Claims5
A centrifugally cast, ductile iron utility pole comprising:
- an elongated, hollow pole member which is formed by centrifugal casting so as to have an externally tapered shape with said pole member having a variable wall thickness and having variable outside cross-sectional dimensions whereby said wall thickness and said outside cross-sectional dimensions vary perpendicularly to the member's long axis and where said variable wall thickness varies proportionately to said outside cross-sectional dimensions so that the wall thickness imparted to the member by the centrifugal casting operation is progressively and uniformly increased from one end of the member to the other.
Dependencies are inferred from the claim text.