Pier Tech Systems, LLC

A foundation support system includes a hollow foundation support shaft formed with a first axial length and a first torque transmitting distal end edge including an asymmetric torque transmitting tooth. The asymmetric torque transmitting tooth includes a forward torque transmitting edge portion and a rearward force transmitting edge portion opposing the forward torque transmitting edge portion. The forward torque transmitting edge portion and the rearward torque transmitting edge portion have a respectively different shape and orientation on the first torque transmitting distal end edge.

A modular foundation support system includes modular foundation support components including shafts provided with integrally formed coupler features on their respective distal ends. The coupler features are configured with a non-uniform wall thickness defining a plurality of sections of respectively different diameter to matingly couple the shafts to one another in a torque transmitting relationship. The coupler features may be integrally formed and fabricated on the distal end of each respective shaft.

A coupled shaft assembly for a foundation support system includes a first coupler extending on a first end of a first hollow foundation support provided with a helical auger. The first coupler is formed with a first main body and a plurality of ribs or grooves formed in the first main body. The plurality of ribs or grooves are respectively formed with an asymmetric section along a portion of a length of the ribs or grooves. The asymmetric section defines an anti-reverse rotation stop surface

A coupled shaft assembly for a foundation support system includes conical-shaped inner and outer couplers with mating helical ribs and grooves, and an anti-reverse element extending through different shaped openings in the inner and outer couplers that accommodates a limited degree of relative rotation of the couplers and thereafter precludes further relative rotation and an undesirable disengagement of the inner and outer couplers when subjected to reverse rotation.

Improved couplers for a building foundation support system include helical ribs and helical grooves in combination with an integrated spring retainer element that automatically snaps into place as the couplers are engaged. Rotational and axial interlocking attachment of support piles is therefore possible without utilizing separately provided fasteners such as bolts.

A coupled shaft assembly for a foundation support system includes inner and outer couplers with mating helical ribs and grooves, and spring element that resiliently interlocks the inner and outer couplers in an axial direction. Built-in anti-reverse rotation elements in each coupler accommodates a limited degree of relative rotation of the couplers and thereafter precludes further relative rotation that could otherwise negatively impact the spring element and lead to an undesirable disengagement of the inner and outer couplers.

A coupled shaft assembly for a foundation support system includes conical-shaped inner and outer couplers with mating helical ribs and grooves, and an anti-reverse element extending through different shaped openings in the inner and outer couplers that accommodates a limited degree of relative rotation of the couplers and thereafter precludes further relative rotation and an undesirable disengagement of the inner and outer couplers when subjected to reverse rotation.

Coupled shaft assemblies for a foundation support system include shafts provided with profiled distal end edges that may be directly engaged to one another to realize an interlocking torque transmitting relationship with one another along a curved engagement surface. A coupler sleeve may snugly receive the distal ends of the directly engaged shafts and may fasten the shafts to one another through the coupler sleeve with ease in an economical manufacture that does not require non-uniform wall thickness in the shafts to establish torque transmission capability.

A building foundation support system includes first and second components having a distal end formed with an outer surface and at least two spaced apart ribs or with at least two spaced apart grooves. When the ribs are respectively inserted into the grooves, a rotationally interlocked mechanical connection is established between the distal ends. One of the first and second components is an elongated pile shaft and the other is a drive tool coupler for driving the elongate pile shaft into the ground proximate the building foundation.

A foundation support system and method includes support components having mating ends with a pair of fastener holes and a rotational interlock feature configured to partly engage one another while the rotational interlock features are misaligned, and to self-align and fully engage the rotational interlock features via a rotation of one of the ends relative to the other while also automatically aligning the pairs of fastener holes to simplify an insertion of a fastener while avoiding fastener hole deformation when the foundation support components are driven to a desired depth on a building site to support the building foundation.