ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,484, issued on May 5, was assigned to Artisan Industries Inc. (Stoughton, Mass.).
"Seal sheet for rotary valve" was invented by David A. Hudson (Stoughton, Mass.), Austin Sady (Wilbraham, Mass.), Peter J. Tavilla (Rochester, Mass.), Thomas Gibbons (N. Attleboro, Mass.) and Ute Meissner (Medfield, Ukraine).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary valve includes a rotor plate, a track plate, and a seal sheet, all housed within a pressure dome. The seal sheet includes little or no polytetrafluoroethylene (PTFE). Is some embodiments, the seal sheet includes about 35-60% bronze. In some embodiments, the rotor plate and/or the track plate incl...