Wade A Burdick

7059418, Jun 13, 2006

Nov 18, 2003

10/715708

Kevin E. Greeb - Fort Collins CO, US
Jeffrey T. Stewart - Greeley CO, US
Wade A. Burdick - Windsor CO, US
Gary M. Bowman - Loveland CO, US

Woodward Governor Company - Fort Collins CO

E21B 34/02

166387, 166 971, 1663321, 1663344, 166386

A pressurized sealing arrangement suited for providing a seal between a valve stem and a valve body is provided. The sealing arrangement includes a piston that is restrained in and statically sealed to the valve body and which surrounds the valve stem. Contained within the piston is an annular seal packing that includes two sealing elements spaced apart by a spacer element. The piston includes a face acted upon by a process fluid flowing through the valve body in such a manner that the piston exerts pressure upon a lubricant cavity. The lubricant cavity is in fluid communication with the seal packing such that lubricant contained therein forms a lubricant ring around the stem. Lubricant is also thereby supplied to sealing elements of the packing seal. To prevent contamination of the seal packing, a removable cover is provided that encloses the piston and seal packing.

7118114, Oct 10, 2006

May 15, 2003

10/440507

Wade A. Burdick - Windsor CO, US
Gary M. Bowman - Loveland CO, US

Woodward Governor Company - Fort Collins CO

F16J 15/18
F16J 15/32

277510, 277516, 277549

A dynamic sealing arrangement for preventing leakage of a fluid along a shaft includes multiple seals and pressurized barrier sealant. According to one aspect, at least three seals are arranged along the shaft with pressurized barrier sealant between the first and second seals and a collection area is provided between the second and third seals to collect any leakage that might occur. Collected leakage, if any, is ported to an output port. According to another aspect, a unitary seal block member is provided that supports the dynamic sealing arrangement for the shaft and defines a piston chamber and a drilled passageway connecting the piston chamber and barrier sealant pressurization chamber between two seals. A substantial amount of plumbing is self contained in a single body minimizing the need for additional components or complexity.

7356990, Apr 15, 2008

Aug 29, 2005

11/214269

Wade A. Burdick - Windsor CO, US
Gary M. Bowman - Loveland CO, US
Jeffrey T. Stewart - Greeley CO, US

Woodward Governor Company - Rockford IL

F16D 31/02

60416, 60399

An electro hydraulic actuator with built-in fail safes is provided. Multiple accumulators are integrated into the actuator to improve reliability and redundancy. One or more accumulators can fail and the remaining accumulators provide sufficient energy to move the actuator to its fail-safe condition.

7426936, Sep 23, 2008

Mar 2, 2006

11/366299

Jeff A Gessaman - Fort Collins CO, US
Steven Charles Stumbo - Fort Collins CO, US
Kevin E. Greeb - Fort Collins CO, US
Wade A. Burdick - Fort Collins CO, US

Woodward Governor Company - Fort Collins CO

F16J 9/00

137312, 251214, 277320

A redundant sealing system with secondary containment for preventing leakage of fluid along a valve shaft is provided. The system comprises a first set of dynamic seals, a second set of dynamic seals, an auxiliary barrier fluid chamber, and a barrier fluid indicator. The first and second set of dynamic seals are in spaced relation to each other a distance equal to or further than a maximum stroke length of an actuatable valve stem. The auxiliary barrier fluid chamber is interposed between the first and second sets of dynamic seals. The barrier fluid indicator has a piston in a primary barrier fluid chamber. A first face of the piston is exposed to the auxiliary barrier fluid chamber. A second face of the piston is exposed to a barrier fluid and inhibited from fluid communication with the auxiliary barrier fluid chamber by a dynamic seal in the first set of dynamic seals.

8074999, Dec 13, 2011

Oct 6, 2006

11/539216

Wade A. Burdick - Fort Collins CO, US
Gary M. Bowman - Fort Collins CO, US

Woodward, Inc. - Fort Collins CO

F16J 15/18
F16J 15/26
F16J 15/32

277510, 277516, 277549, 277562

A dynamic sealing arrangement for preventing leakage of a fluid along a shaft includes multiple seals and pressurized barrier sealant is presented. According to one aspect, at least three seals are arranged along the shaft with pressurized barrier sealant between the first and second seals and a collection area is provided between the second and third seals to collect any leakage that might occur. Collected leakage, if any, is ported to an output port. According to another aspect, a unitary seal block member is provided that supports the dynamic sealing arrangement for the shaft and defines a piston chamber and a drilled passageway connecting the piston chamber and barrier sealant pressurization chamber between two seals. A substantial amount of plumbing is self contained in a single body minimizing the need for additional components or complexity.

20030070711, Apr 17, 2003

Oct 15, 2001

09/977566

Gary Bowman - Loveland CO, US
Wade Burdick - Windsor CO, US

Woodward Governor Company - Fort Collins CO

F16K023/00

137/312000

A compact fuel control valve is presented where a hydraulic manifold is used as both a valve bonnet and an actuator seat for the valve actuator. The valve body has a fuel inlet, a fuel outlet and a metering plug opening. A metering plug guide mounted within the metering plug opening and attached to the hydraulic manifold forms a thermal barrier between the valve body and the hydraulic manifold to protect lower temperature components from high temperature gaseous fluids. A valve metering plug is directly coupled to the valve actuator piston. The hydraulic manifold maintains barriers between the hydraulics and the gaseous fuel with redundant seals and leakage paths. An intermediate vent within the hydraulic manifold routed to atmosphere further maintains physical separation of the gas and hydraulic system.

20070120084, May 31, 2007

Nov 29, 2005

11/288756

Steven Stumbo - Windsor CO, US
Kevin Greeb - Fort Collins CO, US
Wade Burdick - Windsor CO, US

F16K 31/44

251214000

A redundant sealing system with secondary containment for preventing leakage of fluid along a valve shaft is provided. The system comprises a first set of dynamic seals, a second set of dynamic seals, an auxiliary barrier fluid chamber, and a barrier fluid indicator. The first and second set of dynamic seals are in spaced relation to each other a distance equal to or further than a maximum stroke length of an actuatable valve stem. The auxiliary barrier fluid chamber is interposed between the first and second sets of dynamic seals. The barrier fluid indicator has a piston in a primary barrier fluid chamber. A first face of the piston is exposed to a process fluid. A second face of the piston is exposed to a barrier fluid and inhibited from fluid communication with the auxiliary barrier fluid chamber by a dynamic seal in the first set of dynamic seals.