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. 19, 2021
Filed:
Jun. 09, 2019
Applicant:
Bell Helicopter Textron Inc., Fort Worth, TX (US);
Inventor:
Joseph D. Rainville, Fort Worth, TX (US);
Assignee:
Textron Innovations Inc., Providence, RI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/04223 (2016.01); B64C 39/02 (2006.01); B64D 41/00 (2006.01); H01M 8/04014 (2016.01); H01M 8/04007 (2016.01); H01M 8/04701 (2016.01); H01M 8/04992 (2016.01);
U.S. Cl.
CPC ...
H01M 8/04253 (2013.01); B64C 39/024 (2013.01); B64D 41/00 (2013.01); H01M 8/04014 (2013.01); H01M 8/04037 (2013.01); H01M 8/04074 (2013.01); H01M 8/04731 (2013.01); H01M 8/04992 (2013.01); B64C 2201/02 (2013.01); B64C 2201/042 (2013.01); B64D 2041/005 (2013.01); H01M 2250/20 (2013.01);
Abstract
An air-cooled fuel-cell freeze-protection system for a rotorcraft using a controller to vary a heating system for an air-cooled fuel cell. The heating system heats supply air for the air-cooled fuel cell, and a butterfly valve varies a pressure of the supply air to the air-cooled fuel cell. The heating system can be an electric heater, a heat exchanger, or a combination of heater and heat exchanger.