ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,375, issued on Aug. 12, was assigned to BIEN-AIR HOLDING SA (Biel/Bienne, Switzerland).
"Selective coupling device for a collet chuck" was invented by Davide Sarchi (Zurich, Switzerland), Myriam Mosimann (Biel/Bienne, Switzerland) and Yann Gateau (Biel/Bienne, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A handpiece suitable for dental or chirurgical applications, including a device for clamping a drilling tool, able to be actuated in rotation about an axis of rotation by a drive mechanism. The drive mechanism has a drive shaft rotatable about the said axis of rotation. The clamping device includes a clamp disposed inside the drive sha...