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. 04, 2008
Filed:
Dec. 06, 2005
Applicants:
Philip M Sargent, Cambridge, GB;
Peter Malkin, Hexham, GB;
Brian E Simmers, Derby, GB;
Inventors:
Assignee:
Rolls-Royce plc, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
F25D 23/12 (2006.01); F25B 19/00 (2006.01); F25B 9/00 (2006.01); H02H 7/00 (2006.01); H05K 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fault current limiter comprising: an input node; an output node; a variable impedance element coupled between the input node and the output node; a multi-cycle refrigeration system, comprising a first coolant cycle for cooling the variable impedance element and a second coolant cycle, thermally coupled to the first coolant cycle, for cooling the first coolant, wherein the variable impedance element comprises Magnesium Diboride.