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. 18, 1985
Filed:
Mar. 07, 1983
Applicant:
Inventor:
Kiyoshi Ouchi, Fujisawa, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417360 ; 417424 ; 4151 / ;
Abstract
A submergible motor pump assembly is disclosed which is arranged to be easy to access to any part of the assembly with dismantling minimum elements, i.e. without requiring disassembly of the whole and without requiring discharging lubricating oil for a mechanical seal. Also, plural balance holes are provided in the main plate of the impeller and a liner ring is disposed between the main plate and the top wall of the impeller chamber to establish the flow passage from the tip of the impeller blades through the gap between the main plate and the top wall of the chamber to the balance holes with flow restricted zones by the liner ring.