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:
Jun. 29, 2010
Filed:
Oct. 28, 2005
Takashi Yanagisawa, Tokyo, JP;
Koji Akiyama, Tokyo, JP;
Masanobu Ito, Tokyo, JP;
Mami Uchiyama, Tokyo, JP;
Takashi Yanagisawa, Tokyo, JP;
Koji Akiyama, Tokyo, JP;
Masanobu Ito, Tokyo, JP;
Mami Uchiyama, Tokyo, JP;
Eagle Industry Co., Ltd., Tokyo, JP;
Abstract
A mechanical seal device includes a rotational seal ring connected to a rotational shaft, having a rotational seal surface and arc-shaped grooves arranged on the rotational seal surface. The grooves are sectionalized by partition walls. A stationary seal ring has a stationary seal surface facing the rotational seal surface of the rotational seal ring. A spring biases the stationary seal ring against the rotational seal ring. Outlet portions are formed on the stationary seal surface of the stationary seal ring and connect with a fluid supply path for supplying a pressure fluid. A circumferential direction length (W) of each outlet portion is made to be ½ of a circumferential direction length (W) of each partition wall or longer (W≧W/2); and a circumferential direction length (W) of the outlet portions is made to be shorter than a circumferential direction length (W) of the arc-shaped grooves (W<W).