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:
Jun. 30, 2015
Filed:
Nov. 10, 2009
Takayoshi Ozaki, Iwata, JP;
Hiroyuki Yamada, Iwata, JP;
Kenichi Suzuki, Iwata, JP;
Ken Sugiura, Iwata, JP;
Takayoshi Ozaki, Iwata, JP;
Hiroyuki Yamada, Iwata, JP;
Kenichi Suzuki, Iwata, JP;
Ken Sugiura, Iwata, JP;
Thoratec Corporation, Pleasanton, CA (US);
Abstract
A centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a permanent magnet provided in one surface of the impeller, a permanent magnet provided in an inner wall of the blood chamber, a permanent magnet provided in the other surface of the impeller, and a magnetic material and a coil provided in a motor chamber for driving the impeller to rotate via a diaphragm. Grooves for hydrodynamic bearing are formed in the diaphragm facing the impeller, and in the inner wall of the blood chamber, respectively. As a result, the impeller can be smoothly activated to drive by controlling a coil current.