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).

  • Patent number: 9103453
    Abstract: 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: Grant
    Filed: January 17, 2014
    Date of Patent: August 11, 2015
    Assignee: FISHER CONTROLS INTERNATIONAL LLC
    Inventors: David Anthony Arnold, David George Halm
  • Patent number: 8794589
    Abstract: 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: Grant
    Filed: January 27, 2009
    Date of Patent: August 5, 2014
    Assignee: Fisher Controls International, LLC
    Inventors: David Anthony Arnold, David George Halm, Michael Wildie McCarty
  • Publication number: 20140131608
    Abstract: 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: Application
    Filed: January 17, 2014
    Publication date: May 15, 2014
    Applicant: FISHER CONTROLS INTERNATIONAL, LLC
    Inventors: David Anthony Arnold, David George Halm
  • Patent number: 8662099
    Abstract: 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: Grant
    Filed: April 23, 2010
    Date of Patent: March 4, 2014
    Assignee: Fisher Controls International, LLC
    Inventors: David Anthony Arnold, David George Halm
  • Patent number: 8544820
    Abstract: 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: Grant
    Filed: June 30, 2009
    Date of Patent: October 1, 2013
    Assignee: Fisher Controls International LLC
    Inventors: Douglas P. Gethmann, David George Halm, David Anthony Arnold
  • Publication number: 20110260086
    Abstract: 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: Application
    Filed: April 23, 2010
    Publication date: October 27, 2011
    Inventors: David Anthony Arnold, David George Halm
  • Publication number: 20100327207
    Abstract: 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: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: Douglas P. Gethmann, David George Halm, David Anthony Arnold
  • Publication number: 20100187454
    Abstract: 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: Application
    Filed: January 27, 2009
    Publication date: July 29, 2010
    Inventors: David Anthony Arnold, David George Halm, Michael Wildie McCarty
  • Patent number: 7410144
    Abstract: 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: Grant
    Filed: May 31, 2005
    Date of Patent: August 12, 2008
    Assignee: Fisher Controls International LLC
    Inventors: Douglas Paul Gethmann, David George Halm
  • Patent number: 7028712
    Abstract: 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: Grant
    Filed: July 17, 2002
    Date of Patent: April 18, 2006
    Assignee: Fisher Controls International LLC.
    Inventors: William Everett Wears, David George Halm
  • Publication number: 20040011412
    Abstract: 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: Application
    Filed: July 17, 2002
    Publication date: January 22, 2004
    Inventors: William Everett Wears, David George Halm