The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2025
Filed:
Mar. 30, 2022
Eagleburgmann Japan Co., Ltd., Tokyo, JP;
Ryo Nakamura, Tokyo, JP;
EAGLEBURGMANN JAPAN CO., LTD., Tokyo, JP;
Abstract
A shaft sealing device sealing a sealed fluid includes a mating ring having a sliding surface and attached to a casing into which a rotating shaft is inserted, a commonly used seal ring having a sliding surface that slides against the sliding surface of the mating ring, and attached to the rotating shaft, and the sliding surfaces, and a backup seal ring attached to the rotating shaft on a counter-sealed fluid side in an axial direction with respect to the sliding surface of the mating ring and the sliding surface of the commonly used seal ring, and having a sliding surface facing the sealed fluid in the axial direction. The backup seal ring is movable toward the sealed fluid in the axial direction.