ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,174, issued on March 18, was assigned to GOODRICH ACTUATION SYSTEMS SAS (Buc, France).
"Abradable seal" was invented by Arnauld Hervieux (Versailles, France) and Bastien Le Riguer (Morainvilliers, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "An abradable seal includes an outer ring arrangement and an energiser for urging said outer ring arrangement against an opposing surface, wherein an outermost surface of said outer ring arrangement defines a sealing surface of said abradable seal; wherein said outer ring arrangement is configured such that after a first period of operation said sealing surface suddenly transitions from having a relativ...