ALEXANDRIA, Va., June 16 -- United States Patent no. 12,653,945, issued on June 16, was assigned to INSULET Corp. (Acton, Mass.).

"Drive mechanism for positive displacement pumps" was invented by Soroush Kamrava (Everett, Mass.), Steven Cardinali (Tewksbury, Mass.) and Jeffrey Barnes (Medford, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A novel embodiment of a drive mechanism for use in a pump, for example, of the type that would be used in a wearable drug delivery system, comprises, a cylindrically-shaped slider element configured with a channel on a circumferential surface thereof defining one or more zig-zag-shaped tracks therethrough. One or more pegs are engaged within the tracks, such that a b...