ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,677, issued on July 28, was assigned to Gordon J. Erickson (Victoria, Canada).

"Drop hammer systems and methods for driving elongate members into the earth" was invented by Gordon J. Erickson (Victoria, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drop hammer pile driving system comprising a housing assembly comprising a housing member and a drop plate assembly, a hammer member, and a drive system. The drive system comprises a first drive wheel assembly comprising a first drive wheel and a motor and a second drive wheel assembly comprising a second drive wheel and an actuator assembly. The actuator assembly displaces the second drive whee...