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:
Oct. 20, 2009
Filed:
Apr. 01, 2008
Paul B. Koeneman, Palm Bay, FL (US);
Paul B. Koeneman, Palm Bay, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
A fluid displacement device () having a homopolar motor (). The homopolar motor includes a rotatable disk () with at least one fluid displacement structure () disposed thereon. The fluid displacement structure can be a blade. The rotatable disk can be disposed within a cavity () defined in a substrate (), such as a ceramic substrate, a liquid crystal polymer substrate, or a semiconductor substrate. A closed loop control circuit () can be included to control the rotational speed of the rotatable disk. For example, the control circuit can control a voltage source or a current source that applies voltage across the rotatable disk. The control circuit also can control a strength of a magnet () that applies a magnetic field () substantially aligned with an axis or rotation () of the rotatable disk.