US Patent 7832528 Brake mechanism for operating table

A brake mechanism is provided on one of four corners of a rectangular base of an operating table. Each brake mechanism has a cam fixed by a rotating shaft, an a hydraulic cylinder and a braking post. When braking, the hydraulic cylinder pushes the cam to rotate, and the cam abuts the braking post to press against the floor. Wheels on the base of the operating table depart upward a distance from the floor for braking. Detecting sheets are provided on the rotating shafts of two brake mechanisms which stand on the same sides. The detecting sheets match detectors to control action of the hydraulic cylinders.