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. 18, 2011
Filed:
Sep. 23, 2008
Applicants:
Philip M. Sargent, Cambridge, GB;
Peter Malkin, Hexham, GB;
Brian E. Simmers, Derby, GB;
Inventors:
Assignee:
Rolls-Royce plc, London, GB;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F25B 19/00 (2006.01); F25B 9/00 (2006.01); H02H 7/00 (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 closed loop cryocooler circuit, comprising a first cryocooler for cooling the variable impedance element and a second cryocooler, thermally coupled to the first cryocooler, for cooling the first coolant, wherein the variable impedance element comprises Magnesium Diboride.