Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2007-03-02
2010-12-07
Cuff, Michael (Department: 3741)
Power plants
Combustion products used as motive fluid
Process
C060S039281, C060S734000
Reexamination Certificate
active
07845177
ABSTRACT:
A fuel system includes first and second drive assemblies that are independently drivable relative to one another. The second drive assembly has a speed that is selectively controlled based upon a desired fuel flow. A non-positive displacement pump is driven by the first drive assembly. The non-positive displacement pump provides a desired fuel pressure for the fuel system. A positive displacement pump is driven by the second drive assembly. The positive displacement pump meters a desired volume in response to the speed of the second drive assembly in a first rotational direction. The fuel flows from the pumps and passes through a bypass valve that acts as a minimum pressure shut-off valve. During shut-down of the first drive assembly, the bypass valve is opened by a solenoid and the rotational direction of the second drive assembly is reversed to a second rotational direction to evacuate fuel from the system with the positive displacement pump and return the fuel to the fuel tank.
REFERENCES:
patent: 3908360 (1975-09-01), Meyer et al.
patent: 3946551 (1976-03-01), Linebrink et al.
patent: 4208871 (1980-06-01), Riple, Jr.
patent: 4332527 (1982-06-01), Moldovan et al.
patent: 4607486 (1986-08-01), Cole
patent: 4864815 (1989-09-01), Cygnor
patent: 5116362 (1992-05-01), Arline et al.
patent: 5220793 (1993-06-01), McGlone et al.
patent: 5495715 (1996-03-01), Loxley
patent: 6353790 (2002-03-01), Tsuzuki
patent: 6675570 (2004-01-01), Herbison et al.
patent: 7080507 (2006-07-01), Katogi et al.
patent: 7216487 (2007-05-01), Parsons
patent: 2001/0054290 (2001-12-01), Herbison et al.
patent: 652321 (1951-04-01), None
patent: 2-26736 (1990-02-01), None
patent: 04-325724 (1992-11-01), None
patent: 2004-225539 (2004-08-01), None
patent: 2005-351196 (2005-12-01), None
patent: 2006-83864 (2006-03-01), None
European Search Report, Feb. 15, 2006.
Office Action for Japanese Application No. 2008-51601, Jun. 1, 2010.
Carlson Gaskey & Olds P.C.
Cuff Michael
Hamilton Sundstrand Corporation
Kim Craig
LandOfFree
Metering demand fuel system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metering demand fuel system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metering demand fuel system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4213131