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:
Apr. 21, 1992
Filed:
Sep. 21, 1990
Applicant:
Inventor:
Masao Irie, Yokohama, JP;
Assignee:
Jidosha Denki Kogyo K.K., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415206 ; 415106 ; 4162 / ;
Abstract
A small-sized centrifugal pump is improved in its efficiency and performance by having an impeller the height of which is higher than theoretically calculated value and decreases in the circumferential direction from the central portion, and which has a flow channel with a narrow and constant width.