US Patent Issued to Archer Aviation on Nov. 3 for "Proprotor blade retention system" (California Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,780,402, issued on Nov. 3, was assigned to Archer Aviation Inc. (San Jose, Calif.).

"Proprotor blade retention system" was invented by James Orbon (Newport Beach, Calif.), Scott Ketcham (Oceanside, Calif.) and Alan Buehne (Mission Viejo, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In one aspect, a blade retention system-for a variable pitch aircraft proprotor system-may comprise a double conical blade root encapsulated by a split sleeve. Some embodiments described additionally include fail-operational features. The preload of the blade pitch bearings pushes the metallic split sleeve into the bond line with the blade root."

The patent was filed...