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:
Feb. 11, 2003
Filed:
Aug. 30, 1999
Shinichi Enomura, Osaka, JP;
M. Technique Co., Ltd., Osaka, JP;
Abstract
The invention relates to a mechanical seal that may control the pressure between sliding faces of sliding rings in the mechanical seal portion and also clean and sterilize the sliding faces reliably, and an agitating device and process using the mechanical seal. The rotary ring rotatable together with the revolving shaft and the fixed ring disposed opposite to said rotary ring on the agitating tank side include controlling mechanisms for controlling the pressure or the gap between both sliding faces respectively. Said controlling mechanism is a piston placed within the cylinder provided in the casing, and positive or negative pressure is applied through said piston to the fixed ring for control of the pressure between the sliding faces by changing the pressure of fluid such as air supplied into the cylinder. In cleaning and sterilizing operations, negative pressure is used to open the gap between the sliding faces to allow passage of cleaning liquid or steam for sterilization between both sliding faces.