Patent ID: 8517640

Claim:
A pile assembly, comprising: a connecting shaft section; a toe shaft section; a bi-directional assembly, wherein the bi-directional assembly interconnects with the connecting shaft section and the toe shaft section such that as the connecting shaft section is rotated in a driving direction about a pile longitudinal axis the toe shaft section is also rotated in the driving direction about the pile longitudinal axis, wherein the bi-directional assembly is adapted to simultaneously apply a separation force to the toe shaft section tending to push the toe shaft section away from the connecting shaft section and apply the separation force to the connecting shaft section tending to push the connecting shaft section away from the toe shaft section; and at least one extension structure, wherein each extension structure is attached to the connecting shaft section and/or to the toe shaft section, wherein when the connecting shaft section is rotated in a driving direction about the pile longitudinal axis and the toe shaft section is rotated in the driving direction about the pile longitudinal axis, while one or more of the at least one extension structure is positioned in a ground medium, the ground medium applies a driving force to the one or more of the at least one extension structure such that the driving force tends to push the pile assembly further into the ground medium.