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. 03, 2023
Filed:
Sep. 25, 2019
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Osamu Suzuki, Osaka, JP;
Yasuyuki Okunishi, Osaka, JP;
Shuhei Matsui, Osaka, JP;
Masanao Ishijima, Osaka, JP;
NIPPON PILLAR PACKING CO., LTD., Osaka, JP;
Abstract
Each of the mechanical seal devices of a rotary joint includes a first shaft side seal ring attached to a shaft body and a first case slide seal ring attached to one side of the first shaft side seal ring as well as a second case side seal ring attached to a case body and a second shaft side seal ring attached to the second case side seal ring. A first communication flow passage is formed between a first sliding portion of the first seal rings and a second sliding portion of the second seal rings. A second communication flow passage is formed between the first sliding portion of a mechanical seal device disposed on one side in the axial direction and the second sliding portion of a mechanical seal device disposed on the other side in the axial direction in mechanical seal devices adjacent to each other.