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:
Sep. 13, 2022
Filed:
Aug. 15, 2018
Ebara Corporation, Tokyo, JP;
Shigeru Yoshikawa, Tokyo, JP;
Junichi Hayakawa, Tokyo, JP;
EBARA CORPORATION, Tokyo, JP;
Abstract
A sealing system includes: a double mechanical seal having a pump-side sealing mechanism () and an atmospheric-side sealing mechanism (); a pump mechanism () driven by a rotational shaft (); a first medium circulation line () for circulating a fluid barrier-and-cooling medium between a first chamber (a) and a second chamber (b), the first medium circulation line () being coupled to the first chamber (a) and the second chamber (b), the fluid barrier-and-cooling medium being different from a fluid handled by the centrifugal pump; a heat exchanger () and a shut-off valve () attached to the first medium circulation line (); a second medium circulation line () bypassing the shut-off valve (); and a medium pressurizing pump () and an on-off valve () attached to the second medium circulation line ().