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:
Jul. 24, 2007
Filed:
Jan. 21, 2003
Applicants:
Kenichi Kajiwara, Tokyo, JP;
Sou Kuroiwa, Tokyo, JP;
Kikuichi Mori, Tokyo, JP;
Koichi Kunimasa, Tokyo, JP;
Inventors:
Kenichi Kajiwara, Tokyo, JP;
Sou Kuroiwa, Tokyo, JP;
Kikuichi Mori, Tokyo, JP;
Koichi Kunimasa, Tokyo, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/18 (2006.01); F04D 29/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An impeller () according to the present invention has a disk-like main plate (), a blade () joined to the main plate, and a side plate () having a suction port. A boss hole () is formed in a central portion of the main plate for attaching a boss which engages with a pump shaft to the boss hole. A step portion () is formed around the boss hole, which is formed in the main plate, by drawing.