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:
Nov. 04, 2003
Filed:
Oct. 15, 2001
Applicant:
Inventors:
Satoshi Matsumoto, Uji, JP;
Minoru Murai, Yawata, JP;
Assignee:
Tsurumi Manufacturing Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F60J 1/534 ; F04B 3/902 ;
U.S. Cl.
CPC ...
F60J 1/534 ; F04B 3/902 ;
Abstract
An apparatus for retaining lubrication oil at the sliding surface of a double-type shaft seal device disposed within an oil chamber of a submersible pump. The apparatus prevents lubrication oil from scattering from the center portion of the oil chamber of the submersible pump toward the circumferential wall, and prevents entrapment of air into the lubrication oil through formation of an oil film in the oil outlet, irrespective of variation in rotational speed of the pump shaft, so that the seal apparatus is lubricated and cooled effectively.