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. 27, 2018
Filed:
Sep. 18, 2015
Applicant:
Rolls-royce, Plc, London, GB;
Inventors:
Martin Yates, Derby, GB;
Mihir Desai, Derby, GB;
Assignee:
ROLLS-ROYCE PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C 7/236 (2006.01); F04B 49/035 (2006.01); F04B 23/14 (2006.01); F04B 17/05 (2006.01); F04D 15/00 (2006.01); F04D 1/10 (2006.01); F04B 23/12 (2006.01); F04B 41/06 (2006.01); F04D 13/12 (2006.01); F04D 9/04 (2006.01); F04C 2/10 (2006.01); F04C 2/344 (2006.01); F04C 11/00 (2006.01);
U.S. Cl.
CPC ...
F02C 7/236 (2013.01); F04B 17/05 (2013.01); F04B 23/12 (2013.01); F04B 23/14 (2013.01); F04B 41/06 (2013.01); F04B 49/035 (2013.01); F04D 1/10 (2013.01); F04D 9/04 (2013.01); F04D 13/12 (2013.01); F04D 15/0011 (2013.01); F04C 2/10 (2013.01); F04C 2/344 (2013.01); F04C 11/006 (2013.01); F04C 2210/1044 (2013.01); F05D 2220/323 (2013.01);
Abstract
A fuel pumping unit has a low pressure centrifugal pump and a high pressure centrifugal pump. In use, the low pressure pump supplies fuel at a boosted pressure to the high pressure pump for onward supply to a fuel metering unit. The pumping unit further has a drive input which drives the low and high pressure pumps. A gear arrangement is operatively located between the drive input and the low and high pressure pumps such that the low and high pressure pumps are driven at different speeds by the drive input.