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:
Dec. 09, 2014
Filed:
Jun. 22, 2011
Applicants:
Stephen H. Reichenbach, Pleasanton, CA (US);
George Chao-chih Hsu, San Ramon, CA (US);
Yu Fai Law, Daly City, CA (US);
Inventors:
Stephen H. Reichenbach, Pleasanton, CA (US);
George Chao-chih Hsu, San Ramon, CA (US);
Yu Fai Law, Daly City, CA (US);
Assignee:
Thoratec Corporation, Pleasanton, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61N 1/362 (2006.01); A61M 1/10 (2006.01); A61M 1/12 (2006.01);
U.S. Cl.
CPC ...
A61M 1/1086 (2013.01); A61M 1/122 (2014.02); A61M 2205/3365 (2013.01);
Abstract
A fluid delivery system includes an electric motor, a pump driven by the electric motor, and a control system. The control system is programmed to supply a variable voltage to the electric motor, to sense a response of a current of the electric motor to the variable voltage, and to obtain frequency domain information about the response of the current of the electric motor.