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:
Jan. 30, 2007
Filed:
Mar. 02, 2001
Harold J. Vinegar, Houston, TX (US);
Robert Rex Burnett, Katy, TX (US);
William Mountjoy Savage, Houston, TX (US);
Frederick Gordon Carl, Jr., Houston, TX (US);
John Michele Hirsch, Houston, TX (US);
Harold J. Vinegar, Houston, TX (US);
Robert Rex Burnett, Katy, TX (US);
William Mountjoy Savage, Houston, TX (US);
Frederick Gordon Carl, Jr., Houston, TX (US);
John Michele Hirsch, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
A power supply apparatus is provided for supplying power and communications within a first piping structure. An external power transfer device is positioned around the first piping structure and is magnetically coupled to an internal power transfer device. The internal power transfer device is positioned around a second piping structure disposed within the first piping structure. A main surface current flowing on the first piping structure induces a first surface current within the external power transfer device. The first surface current causes a second surface current to be induced within the internal power transfer device.