US Patent 7398692 Sealing ring and its managing system

An object of the present invention is to make it possible to accurately and simply manage the performance deterioration and life duration of sealing rings and other various information about each sealing ring. As a means of achieving this object, a sealing ring according to the present invention is a sealing ring 30 to be fitted to a face-to-face part of members 12, 14 to thus seal a space between both members, comprising: a main body part 32 that is ring-shaped and is capable of becoming elastically deformed; and a circuit chip 40 that is attached unitedly to the main body part 32 and has an information-transmitting means 42 for transmitting the information with the outside of the sealing ring 30.