Earth screw anchor assembly having enhanced penetrating capability

摘要

An earth screw anchor assembly has peripheral edges on its hub member and intermediate flange portion of its spade member with different configurations permitting placement of the hub member on the intermediate flange portion in an asymmetrical relation overlapping and offsetting the respective peripheral edges relative to one another to facilitate application of welds thereto for attaching the hub member to the spade member. The assembly also has an attachment land formed on one side of the intermediate flange portion and protruding downwardly therefrom and being attached along and extending partially about an upper end of the lower portion of the spade member. The blade member includes leading and trailing end portions axially offset from one another and a middle portion extending between the leading and trailing end portions. The blade member at the trailing end and middle portions is attached to the hub member while the leading end portion thereof extends below and along the intermediate flange portion and is attached to the attachment land of the spade member so as to dispose the leading end portion of the blade member substantially below the intermediate flange portion and thereby below the lower end of the hub member such that the leading end portion of the blade member will engage and dig into the earth as the assembly is rotated about the longitudinal axis of said spade member before contact is made with the earth by the intermediate flange portion of the spade member and thereafter by the hub member.