ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,926, issued on Nov. 18, was assigned to MORRISON PRODUCTS INC. (Cleveland).
"Impellers and manufacturing methods thereof" was invented by David M. Carroll (Mentor on the Lake, Ohio) and Jeffrey S. Nagal (Mayfield Heights, Ohio).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impeller includes a front plate, a back plate, and a plurality of blades. The front plate has one or more first openings and one or more first locking projections, and the back plate has one or more second openings and one or more second locking projections. Each blade has one or more first and second tabs. The first tabs extend through the first openings of the front plate, an...