Edward Hommema

6981359, Jan 3, 2006

Jun 16, 2003

10/463701

Donald E. Wernberg - Rockford IL, US
Paul J. Schaefer - Loves Park IL, US
Edward L. Hommema - Rockford IL, US

Woodward Governor Company - Fort Collins CO

F02C 9/26

60 39281, 60734

A fuel system for a gas turbine engine that utilizes a centrifugal pump. The system includes a fuel metering valve that is adapted to set a metered flow of fuel, and a throttle valve that is adapted to accurately control pressure drop across the fuel metering valve. The throttle valve has at least two variable orifices and a compensation chamber between the variable orifices. The throttle valve includes a differential valve piston slidable in a valve body. The differential valve piston comprises working surfaces of at least two different diameters such that changes in chamber pressures effect different axial forces upon the piston.

7096658, Aug 29, 2006

Apr 22, 2005

11/112140

Donald E. Wernberg - Rockford IL, US
Paul J. Schaefer - Loves Park IL, US
Edward L. Hommema - Rockford IL, US

Woodward Governor Company - Rockford IL

F02C 9/28

60 39281, 137613

A fuel system for a gas turbine engine that utilizes a centrifugal pump is presented. The system includes a fuel metering valve that is adapted to set a metered flow of fuel, and a throttle valve that is adapted to accurately control pressure drop across the fuel metering valve. The throttle valve has at least two variable orifices and a compensation chamber between the variable orifices. The throttle valve includes a differential valve piston slidable in a valve body. The differential valve piston comprises working surfaces of at least two different diameters such that changes in chamber pressures effect different axial forces upon the piston.

7114336, Oct 3, 2006

Jan 30, 2004

10/769009

Edward L. Hommema - Rockford IL, US

Woodward Governor Company - Rockford IL

F02C 7/22

60734, 13762528

A pulsing valve assembly pulses metered fuel flow to a turbine engine. The pulsing valve assembly comprises a valve housing having an inlet and an outlet. A divider valve divides metered fuel flow into a first flow portion and a second flow portion. A first actuator sets a magnitude of a flow divide between the first and second flow portions. The valve assembly also includes a pulsing valve for pulsing the first flow portion and a second actuator for setting a frequency of pulsing valve. The pulsed and unpulsed flow portions are then joined and delivered to the turbine engine combustion chamber.

20050284148, Dec 29, 2005

Jun 10, 2005

11/150049

Donald Wernberg - Rockford IL, US
Paul Schaefer - Loves Park IL, US
Edward Hommema - Rockford IL, US

F02C007/22

060734000

A fuel system for a gas turbine engine that utilizes a centrifugal pump. The system includes a fuel metering valve that is adapted to set a metered flow of fuel, and a throttle valve that is adapted to accurately control pressure drop across the fuel metering valve. The throttle valve has at least two variable orifices and a compensation chamber between the variable orifices. The throttle valve includes a differential valve piston slidable in a valve body. The differential valve piston comprises working surfaces of at least two different diameters such that changes in chamber pressures effect different axial forces upon the piston.

61582085, Dec 12, 2000

Dec 4, 1998

9/206104

Edward L. Hommema - Rockford IL

Woodward Governor Company - Rockford IL

F02C 900

60 39281

A multiplexed hydraulic control system includes a pressure transducer fluidically connected to the multiplexer for sequential or periodic connection to a plurality of channels. The multiplexed hydraulic control system provides hydraulic control flows to a plurality of second stage valves while simultaneously multiplexing the pressure transducer. The pressure transducer may be multiplexed to multiple second stage valves or actuators to provide multiplexed feedback for closed loop control of the second stage valves. The system may be used to split or throttle fuel flow to the nozzles of a combustion chamber in turbine engines.