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. 19, 2013
Filed:
Feb. 18, 2009
Kohei Tanaka, Hitachinaka, JP;
Yoshimasa Chiba, Tsukuba, JP;
Sadashi Tanaka, Kasumigaura, JP;
Koji Hayashi, Kasumigaura, JP;
Tomohiro Naruse, Hitachinaka, JP;
Takaki Fukuchi, Kasama, JP;
Takeshi Kazama, Kasumigaura, JP;
Kohei Tanaka, Hitachinaka, JP;
Yoshimasa Chiba, Tsukuba, JP;
Sadashi Tanaka, Kasumigaura, JP;
Koji Hayashi, Kasumigaura, JP;
Tomohiro Naruse, Hitachinaka, JP;
Takaki Fukuchi, Kasama, JP;
Takeshi Kazama, Kasumigaura, JP;
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Abstract
To provide a can manufacturing pump impeller in which a stress of a base portion of a blade is prevented from increasing while improving the strength of a joint portion of a hub and a boss. In order to reinforce a joint portion of a hub and a boss, a plate is jointed to the inside of an impeller. In order not to overlap a base portion of a blade and the plate with each other on the hub, an opening portion is provided in the plate around the base portion of the blade on the hub. As a shape of the opening portion, a semicircular shape, a semielliptical shape, a rectangular shape, or a trapezoidal shape can be selected. Further, as a plate shape, a flat plate structure, a shell structure, or a curved structure can be selected.