ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,955, issued on March 17, was assigned to Robert Bosch GmbH (Stuttgart, Germany).
"Counter-rotating fan assembly" was invented by Robert Van Houten (Winchester, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A counter-rotating fan assembly includes an upstream fan that rotates in a first direction about a common axis and a downstream fan that rotates in a second, opposed direction about the common axis. The assembly has an upstream motor that drives the upstream fan, and an upstream motor support that supports the upstream motor. The assembly also has a downstream motor that drives the downstream fan, and a downstream motor support that suppor...