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. 05, 2016
Filed:
Sep. 08, 2011
Applicants:
Takayoshi Ozaki, Iwata, JP;
Hiroyuki Yamada, Iwata, JP;
Ken Sugiura, Iwata, JP;
Inventors:
Assignee:
Thoratec Corporation, Pleasanton, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 5/12 (2006.01); F04D 1/04 (2006.01); A61M 1/10 (2006.01); F04D 13/06 (2006.01); F04D 29/047 (2006.01); F04D 29/048 (2006.01); H02K 21/24 (2006.01); H02K 7/09 (2006.01);
U.S. Cl.
CPC ...
F04D 1/04 (2013.01); A61M 1/101 (2013.01); A61M 1/1015 (2014.02); A61M 1/1017 (2014.02); F04D 13/064 (2013.01); F04D 13/0666 (2013.01); F04D 29/048 (2013.01); F04D 29/0473 (2013.01); H02K 7/09 (2013.01); H02K 21/24 (2013.01); H02K 5/12 (2013.01); H02K 2205/03 (2013.01); H02K 2213/03 (2013.01);
Abstract
A centrifugal blood pump apparatus includes a plurality of permanent magnets () in an impeller () in a blood chamber (), a plurality of coils () in a motor chamber (), and a magnetic element () in each of the coils (). The magnetic elements () are made shorter than the coils () to lower attractive force between the magnetic elements () and the permanent magnets () in the impeller (), to set a large gap between the magnetic elements () and the permanent magnets (). As a result, axial attractive force and negative rigidity can be lowered while required torque is satisfied.