Patents by Inventor David George Halm
David George Halm has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9103453Abstract: A valve shaft apparatus with a rotary valve includes a shaft having a first portion in an opening of a valve body and a second portion in a cavity of a closure member. A first seal is coupled to the first portion to prevent fluid leakage into the opening of the valve body, where the first seal defines a first leakage detection area. A second seal is coupled to the second portion to prevent fluid leakage into the cavity, the second seal is to define a second leakage detection area. A passageway in the shaft is fluidly coupled to the first and second leakage detection areas to provide an indication of fluid leakage past the first seal in the opening or to detect fluid leakage past the second seal in the cavity. The passageway is in fluid communication with a shaft outlet formed in an end of the shaft.Type: GrantFiled: January 17, 2014Date of Patent: August 11, 2015Assignee: FISHER CONTROLS INTERNATIONAL LLCInventors: David Anthony Arnold, David George Halm
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Patent number: 8794589Abstract: Actuators having override apparatus are described herein. An example actuator having an override apparatus includes a first actuator stem coupled to a control actuation member. The override apparatus is operatively coupled to the actuator. A spring is coupled to an override member to move the first actuator stem to a predetermined position in response to an override condition.Type: GrantFiled: January 27, 2009Date of Patent: August 5, 2014Assignee: Fisher Controls International, LLCInventors: David Anthony Arnold, David George Halm, Michael Wildie McCarty
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Publication number: 20140131608Abstract: An example valve shaft apparatus for use with a rotary valve disclosed herein includes a shaft having a first portion to be positioned in an opening of a valve body and a second portion to be positioned in a cavity of a closure member. A first seal is coupled to the first portion of the shaft to prevent fluid leakage into the opening of the valve body, where the first seal defines a first leakage detection area adjacent the first seal. A second seal is coupled to the second portion to prevent fluid leakage into the cavity of the closure member, where the first seal is spaced from the second seal and the second seal is to define a second leakage detection area adjacent the second seal. A passageway is formed in the shaft and fluidly coupled to the first and second leakage detection areas to provide an indication of fluid leakage past the first seal in the opening or to detect fluid leakage past the second seal in the cavity.Type: ApplicationFiled: January 17, 2014Publication date: May 15, 2014Applicant: FISHER CONTROLS INTERNATIONAL, LLCInventors: David Anthony Arnold, David George Halm
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Patent number: 8662099Abstract: An example valve shaft apparatus includes a shaft having a stationary seal and a dynamic seal spaced from the stationary seal. The stationary seal defines a first leakage detection area adjacent the stationary seal and the dynamic seal defines a second leakage detection area adjacent the dynamic seal. A seal leakage detector is integrally formed with the shaft to provide a visual indication of process fluid leakage within the first leakage detection area or within the second leakage detection area. The seal leakage detector has a passageway in fluid communication with the first leakage detection area and the second leakage detection area. The passageway has a cross-sectional profile that changes between the first and second leakage detection areas to prevent fluid from flowing from one of the leakage detection areas into a body of the fluid valve.Type: GrantFiled: April 23, 2010Date of Patent: March 4, 2014Assignee: Fisher Controls International, LLCInventors: David Anthony Arnold, David George Halm
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Patent number: 8544820Abstract: Biasing apparatus for use with actuators are described. A biasing apparatus for use with a piston actuator includes a first sleeve at least partially surrounded by and movably coupled to a second sleeve. Additionally, the biasing apparatus includes a stop to limit an amount of movement of the first sleeve relative to the second sleeve and a biasing element positioned between first and second ends of the respective first and second sleeves to urge the first sleeve away from the second sleeve.Type: GrantFiled: June 30, 2009Date of Patent: October 1, 2013Assignee: Fisher Controls International LLCInventors: Douglas P. Gethmann, David George Halm, David Anthony Arnold
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Publication number: 20110260086Abstract: Valve shaft apparatus are described herein. An example valve shaft apparatus includes a shaft having a stationary seal and a dynamic seal spaced from the stationary seal. The stationary seal defines a first leakage detection area adjacent the stationary seal and the dynamic seal defines a second leakage detection area adjacent the dynamic seal. A seal leakage detector is integrally formed with the shaft to provide a visual indication of process fluid leakage within the first leakage detection area or within the second leakage detection area. The seal leakage detector has a passageway in fluid communication with the first leakage detection area and the second leakage detection area. The passageway has a cross-sectional profile that changes between the first and second leakage detection areas to prevent fluid from flowing from one of the leakage detection areas into a body of the fluid valve.Type: ApplicationFiled: April 23, 2010Publication date: October 27, 2011Inventors: David Anthony Arnold, David George Halm
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Publication number: 20100327207Abstract: Biasing apparatus for use with actuators are described. A biasing apparatus for use with a piston actuator includes a first sleeve at least partially surrounded by and movably coupled to a second sleeve. Additionally, the biasing apparatus includes a stop to limit an amount of movement of the first sleeve relative to the second sleeve and a biasing element positioned between first and second ends of the respective first and second sleeves to urge the first sleeve away from the second sleeve.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Inventors: Douglas P. Gethmann, David George Halm, David Anthony Arnold
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Publication number: 20100187454Abstract: Actuators having override apparatus are described herein. An example actuator having an override apparatus includes a first actuator stem coupled to a control actuation member. The override apparatus is operatively coupled to the actuator. A spring is coupled to an override member to move the first actuator stem to a predetermined position in response to an override condition.Type: ApplicationFiled: January 27, 2009Publication date: July 29, 2010Inventors: David Anthony Arnold, David George Halm, Michael Wildie McCarty
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Patent number: 7410144Abstract: A pivot assembly provides an economical means for reducing the load on a manually operated hand jack by providing a pivot point on the body of a connecting rod which allows for an additional degree of movement. The pivot assembly may include a thrust bearing to further reduce friction on the connection rod.Type: GrantFiled: May 31, 2005Date of Patent: August 12, 2008Assignee: Fisher Controls International LLCInventors: Douglas Paul Gethmann, David George Halm
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Patent number: 7028712Abstract: A skirt guided control valve provides streamlined flow and minimum resistance to flow in flow up and flow down conditions when the valve is open. The skirt guided control valve has a fluid inlet, a fluid outlet, a passageway disposed between the fluid inlet and fluid outlet, a valve seat and a valve plug with a skirt. The valve seat and the skirt portion of the valve plug include blended edges and contoured surfaces to provide for streamlined flow.Type: GrantFiled: July 17, 2002Date of Patent: April 18, 2006Assignee: Fisher Controls International LLC.Inventors: William Everett Wears, David George Halm
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Publication number: 20040011412Abstract: A skirt guided control valve provides streamlined flow and minimum resistance to flow in flow up and flow down conditions when the valve is open. The skirt guided control valve has a fluid inlet, a fluid outlet, a passageway disposed between the fluid inlet and fluid outlet, a valve seat and a valve plug with a skirt. The valve seat and the skirt portion of the valve plug include blended edges and contoured surfaces to provide for streamlined flow.Type: ApplicationFiled: July 17, 2002Publication date: January 22, 2004Inventors: William Everett Wears, David George Halm