Pumps – Three or more cylinders arranged in parallel – radial – or... – Condition responsive fluid control
Reexamination Certificate
2005-06-20
2010-06-01
Freay, Charles G (Department: 3746)
Pumps
Three or more cylinders arranged in parallel, radial, or...
Condition responsive fluid control
C417S307000, C417S313000, C417S366000, C417S419000, C417S440000, C060S039091, C060S734000
Reexamination Certificate
active
07726951
ABSTRACT:
A fuel control system is provided in a single compact modular unit. The unit includes a motor driving a highly accurate cam-operated double-acting piston metering pump, both of which are contained in a liquid fuel environment. As the liquid fuel is pumped it works to cool internal components including the motor. An electronic motor drive is contained in a dry chamber of the unit for controlling operation of the motor and pump and is cooled indirectly by the fuel as well. A pressure sensitive flow divider is also included for selectively providing one or multiple output fuel flow paths depending upon whether a pressure threshold is reached, for example to send fuel to primary and secondary burner nozzles. Filter, filter bypass, pressure relief, and fuel shut-off components are also integrated into the single modular unit.
REFERENCES:
patent: 1229009 (1917-06-01), Allison
patent: 2070880 (1937-02-01), Blum
patent: 2711073 (1955-06-01), Atkinson
patent: 2724239 (1955-11-01), Fox
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patent: 5941693 (1999-08-01), Kato
patent: 6371740 (2002-04-01), Jansen
patent: 6484490 (2002-11-01), Olsen et al.
patent: 6836086 (2004-12-01), Goldberg et al.
patent: 6971373 (2005-12-01), Mudway et al.
Calleja John F.
Forrester, Jr. Raymond A.
Jansen Harvey B.
Freay Charles G
Jansen's Aircraft Systems Controls, Inc.
Quarles & Brady LLP
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