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:
Nov. 02, 2004
Filed:
Feb. 19, 2002
Applicant:
Inventors:
Jeffrey T. Cheung, Thousand Oaks, CA (US);
Hao Xin, Sherman Oaks, CA (US);
Assignee:
Rockwell Scientific Licensing, LLC, Thousand Oaks, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 3/500 ;
U.S. Cl.
CPC ...
H02K 3/500 ;
Abstract
An electrical generator includes a magnet constrained to move relative to a conductor by a support structure, with a ferrofluid bearing providing an ultra low friction interface between the magnet and support structure. The assembly has a critical angle of displacement from a horizontal static position of less than 1 degree, and preferably less than 10 minutes. An electrical signal is generated in the conductor by the moving magnetic field.