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:
Dec. 08, 2015
Filed:
Jul. 05, 2012
Applicants:
David Lloyd Ripley, San Diego, CA (US);
Behzad Hagshenas, San Diego, CA (US);
Inventors:
David Lloyd Ripley, San Diego, CA (US);
Behzad Hagshenas, San Diego, CA (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M 37/00 (2006.01); F02C 7/236 (2006.01); B64D 37/34 (2006.01); F02M 31/16 (2006.01); B64D 41/00 (2006.01);
U.S. Cl.
CPC ...
F02M 37/0052 (2013.01); B64D 37/34 (2013.01); F02C 7/236 (2013.01); F02M 31/166 (2013.01); B64D 41/00 (2013.01); F05D 2220/50 (2013.01); F05D 2260/606 (2013.01); F05D 2260/85 (2013.01); Y02T 10/126 (2013.01); Y02T 50/671 (2013.01); Y10T 137/0324 (2015.04); Y10T 137/86139 (2015.04);
Abstract
A fuel system for an auxiliary power unit includes a mechanical fuel pump, an electric fuel pump, and a controller. The mechanical fuel pump provides fuel flow to the auxiliary power unit and has an output dependent upon an operational speed of the auxiliary power unit. The electric fuel pump is located in flow series with the mechanical fuel pump. The controller causes the electric fuel pump to circulate and thereby warm fuel prior to start up of the auxiliary power unit.