ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,830, issued on April 29, was assigned to MITIS (Bouguenais, France).
"Spindle with piezoelectric actuators" was invented by Sylvain Laporte (Orvault, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Spindle for carrying out machining assisted by non-ultrasonic axial oscillations, including a tool-bearing shaft, and an exciting portion, for subjecting the shaft to non-ultrasonic axial oscillations, especially during its rotation. The exciting portion including a first exciting stage, having at least one piezoelectric actuator, and a second exciting stage, having at least one piezoelectric actuator, having a non-zero axial overlap with the first e...