US Patent Issued to JOHNSON ELECTRIC GERMANY on May 20 for "Centrifugal positive locking brake and method for controlling shutter drives" (German Inventor)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,726, issued on May 20, was assigned to JOHNSON ELECTRIC GERMANY GMBH & Co. KG (Dresden, Germany).

"Centrifugal positive locking brake and method for controlling shutter drives" was invented by Sten Wahrisch (Dresden, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The centrifugal positive locking brake works inversely, that means, locking upon stopping and decoupling on start-up. When the drive motor is de-energized, the fixed ratchet(s) hit against at least one locking abutment on a locking disc positively fixed to the frame and lock the shutter. When voltage is applied, and with the associated quick start-up of the drive motor, the ratchet(...