ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,535, issued on Nov. 18, was assigned to Mac & Mac Hydrodemolition Inc. (Surrey, Canada).
"Tractor towed indexing system" was invented by Gerard J. MacNeil (Surrey, Canada), Jesse MacNeil (Surrey, Canada), Brett MacNeil (Surrey, Canada), Gordon MacNeil (Surrey, Canada) and Vernon Bose (Surrey, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to an apparatus and method for scarifying the interior surface of pipes, such as a sewer pipe. The apparatus comprises a chassis, a carriage coupled to the chassis to reciprocate along a longitudinal axis of the chassis, a shaft capable of indexing rotation coupled to the carriage, and ...