ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,730, issued on Dec. 9.
"Disc brake piston retraction tool with backing plate expansion structure" was invented by Tian Shoei Wang (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A disc brake piston retraction tool is provided. When the tool is applied to a large-scale disc brake, it is necessary to increase the width in the left-to-right direction of the working surface of a pressure plate of the tool. A plate expansion unit is coupled to the outer surface of the pressure plate. When a locking unit is inserted in a coupling hole of the pressure plate, a steel ball is retracted. After the steel ball passes through the coupling hole, a...