ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,792, issued on Oct. 7, was assigned to PILLAR Corp. (Osaka, Japan).
"Mechanical seal device" was invented by Masaya Nakatsuka (Osaka, Japan), Masashi Hayashi (Osaka, Japan) and Shigeyuki Fujinaga (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A mechanical seal device includes: a seal case surrounding a rotary shaft of a rotary machine and separating a machine inner area and a machine outer area of the rotary machine; a mechanical seal placed between the seal case and the rotary shaft; a sealing liquid chamber which is formed in the seal case and into which a sealing liquid for lubricating a sliding portion of the mechanical seal is intr...