US 12,338,599 B2
Foundation support systems, assemblies and methods including sleeve coupler and shafts with torque transmitting profiled distal end edges
Kevin Kaufman, Des Peres, MO (US); and Michael D. Wilkis, Ellisville, MO (US)
Assigned to Pier Tech Systems, LLC, Chesterfield, MO (US)
Filed by PIER TECH SYSTEMS, LLC, Chesterfield, MO (US)
Filed on Jul. 13, 2023, as Appl. No. 18/351,589.
Claims priority of provisional application 63/389,999, filed on Jul. 18, 2022.
Prior Publication US 2024/0018734 A1, Jan. 18, 2024
Int. Cl. E02D 5/52 (2006.01); E02D 5/56 (2006.01); E02D 7/22 (2006.01); E02D 7/02 (2006.01)
CPC E02D 5/526 (2013.01) [E02D 5/56 (2013.01); E02D 7/02 (2013.01); E02D 7/22 (2013.01); E02D 2300/0029 (2013.01); E02D 2600/20 (2013.01)] 40 Claims
OG exemplary drawing
 
1. A foundation support system comprising:
a coupled shaft assembly comprising:
a first hollow support shaft formed with a first axial length and a first profiled distal end edge;
a second hollow support shaft formed with a second axial length and a second profiled distal end edge;
a hollow sleeve that is slidably movable relative to the first hollow support shaft after the first hollow support shaft is driven to a first depth in an installation of the foundation support system; and
a first fastener attaching the hollow sleeve to the first hollow support shaft and maintaining the first profiled distal end edge in a fixed position relative to the sleeve;
wherein when the second profiled distal end edge is slidably engaged to the sleeve and directly abutted and engaged to the first profiled distal end edge, a torque transmitting connection is established between the first hollow support shaft and the second hollow support shaft in order to drive the coupled shaft assembly to a second depth in the installation of the foundation support system; and
wherein the first fastener is mechanically isolated from torque transmission in the coupled shaft assembly.