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:
May. 16, 2017
Filed:
Oct. 25, 2010
Hiroshi Aoike, Tokyo, JP;
Hideyuki Inoue, Tokyo, JP;
Takuji Matsuki, Tokyo, JP;
Masaru Nakamura, Tokyo, JP;
Hiroki Takeno, Tokyo, JP;
Yoshihiro Teshima, Tokyo, JP;
Hiroshi Aoike, Tokyo, JP;
Hideyuki Inoue, Tokyo, JP;
Takuji Matsuki, Tokyo, JP;
Masaru Nakamura, Tokyo, JP;
Hiroki Takeno, Tokyo, JP;
Yoshihiro Teshima, Tokyo, JP;
EAGLE INDUSTRY CO., LTD., Tokyo, JP;
Abstract
Provided is a mechanical seal that ensures the flow rate of a cooling fluid, which is necessary to cool a slide seal surface, and that can prevent erosion from occurring. In the mechanical seal, the ratio between the depth and the width of each groove of a partial impeller is 2.0-5.0; the ratio of the distance between the grooves of the partial impeller to the width of a weir of a casing is 0.5-3.1; the ratio of the total length of the widths of the grooves of the partial impeller to the total length of the peripheral surface of the partial impeller, in which the grooves are formed, is 0.28-0.8; or the ratio of the length of the projected portion of the tip of each groove of the partial impeller to the width of a cooling liquid discharging groove of the casing is greater than 0 and less than or equal to 0.65.