US Patent 7517030 Slide rail structure for industry-used computers

A slide rail structure for industry-used computers comprises a pair of slide elements mounted on two opposite lateral sides of a computer chassis, each having a stepped inner surface with an elongated hole, and a pair of rail mounted on two opposite lateral inner walls of a computer cabinet, each being capable of being inserted into a corresponding elongated hole, whereby inner stepped surfaces of the slide elements and the rails will be smoothly engaged. Therefore, the slide elements, moving together with the computer chassis, will slide along the rails.