ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,092, issued on May 13.
"HVAC exterior cleaning pipework" was invented by Carroll Stewart (Nashville, N.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The HVAC exterior cleaning pipework is a system attachable to a HVAC unit, such that the PVC pipework can clean the exterior of the unit by means of strategically placed sprayer valves. The pipework is extendable, such that it can expand or retract to meet the exact dimensions of the specific HVAC unit whereon it should be attached. The pipework may be connected directly to a hose with sufficiently pressurized water, or the integrated pump may assist in the flow of water. The spray heads and the pum...