Patent ID: 8915313
Filing Date: 2014-12-23
Classification: E02D,E21B

Abstract:
1. A hole boring tool having an axis of rotation, comprising: an inverted hollow cone having inner and outer surfaces, an axial tip located at a lower, soil penetrating portion of the tool, and an upper terminus; a drive frame attached to said upper terminus of said inverted hollow cone, comprising: an axial inner shaft having upper and lower ends, the lower end pivotally and centrally disposed within the tip of the inner surface of said cone, extending axially through said drive frame and hollow outer shaft, and having upper and lower pivot arms attached to a lower portion of said inner shaft within said drive frame; at least one laterally extendable blade assembly having a pivot end and a cutting end, the pivot end pivotally attached between said upper and lower pivot arms; and an indexing assembly, comprising: wherein the lower surface of one of said plates of said indexing assembly is connected to the upper end of said inner shaft, and the lower surface of the other of said plates of said indexing assembly is connected to the upper end of said hollow outer shaft such that the inner diameter thereof communicates with an axial hole in the plate connected thereto, said plates being rotatably moveable relative to each other on the axis of rotation.