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:
Mar. 30, 1999
Filed:
Feb. 08, 1996
Applicant:
Inventors:
Makoto Kobayashi, Fujisawa, JP;
Masakazu Yamamoto, Fujisawa, JP;
Yoshio Miyake, Fujisawa, JP;
Koji Isemoto, Fujisawa, JP;
Kaoru Yagi, Fujisawa, JP;
Keita Uwai, Fujisawa, JP;
Yoshiaki Miyazaki, Fujisawa, JP;
Katsuji Iijima, Fujisawa, JP;
Junya Kawabata, Tokyo, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417244 ; 417350 ; 417365 ; 4174233 ; 4174235 ; 41742314 ;
Abstract
A pump having an improved fluid passage has an inner casing which houses at least one impeller and an outer casing which houses the inner casing. The pump also has a communicating pipe disposed outside of the outer casing for guiding a main flow of a fluid being handled from a space defined in the outer casing into another space defined in the outer casing.