ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,890, issued on Sept. 23, was assigned to Mainspring Energy Inc. (Menlo Park, Calif.).
"High-efficiency linear generator" was invented by Adam Simpson (San Francisco), Shannon Miller (Belmont, Calif.) and Matt Svrcek (Redwood City, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Various embodiments of the present invention are directed toward a linear generator, comprising: a cylinder having a cylinder wall and a pair of ends, the cylinder including a reaction section disposed in a center portion of the cylinder; a pair of opposed piston assemblies adapted to move linearly within the cylinder, each piston assembly disposed on one side of the r...