US Patent Issued to Thomson Industries on Nov. 3 for "System for controlled descent of a lift" (Swedish, American Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,780,625, issued on Nov. 3, was assigned to Thomson Industries Inc. (Marengo, Ill.).

"System for controlled descent of a lift" was invented by Jared Ret Zammuto (Caledonia, Ill.) and Karl Martin Peter Paulsson (Trollgatan, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for controlling descent of a lift includes a linear actuator driven by an electric motor to raise and lower the lift. The motor has a shaft that rotates about an axis. A holding brake applies a braking torque to the shaft when the motor is not driving the shaft. A variable torque control device includes a rotatable member rotatable about the axis and a stationary member radi...