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. 30, 2013
Filed:
May. 17, 2010
Mitsutoshi Yaegashi, Ashigarakami-gun, JP;
Takehiko Asada, Ashigarakami-gun, JP;
Takehisa Mori, Ashigarakami-gun, JP;
Takayoshi Ozaki, Iwata, JP;
Kenichi Suzuki, Iwata, JP;
Mitsutoshi Yaegashi, Ashigarakami-gun, JP;
Takehiko Asada, Ashigarakami-gun, JP;
Takehisa Mori, Ashigarakami-gun, JP;
Takayoshi Ozaki, Iwata, JP;
Kenichi Suzuki, Iwata, JP;
Terumo Kabushiki Kaisha, Shibuya-Ku, Tokyo, JP;
NTN Corporation, Osaka-Shi, Osaka, JP;
Abstract
A blood pump apparatus comprises a housing, a centrifugal pump section including an impeller and rotating inside the housing to feed a fluid by a centrifugal force, an impeller rotational torque generation section for attracting thereto said impeller and rotating said impeller; and a plurality of grooves for hydrodynamic bearing provided on an inner surface of said housing at a side of said impeller rotational torque generation section, each of the grooves for hydrodynamic bearing having a first side and a second side both extending from a periphery of said portion in which a groove for hydrodynamic bearing is formed toward a central side thereof and opposed to each other, a third side connecting one end of said first side and one end of said second side to each other, and a fourth side connecting said other end of said first side and said other end of said second side to each other; said first side and said second side are formed as a circular arc respectively in such a way that centers of said circular arcs are different from each other.