Patents by Inventor David Martin Johnson

David Martin Johnson 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: 6983607
    Abstract: A method to ventilate a rotary machine housed in a compartment having a ventilation air inlet and air exhaust, a variable speed ventilation fan and a temperature sensor, wherein the method includes: sensing a temperature level of the rotary machine; applying the sensed machine temperature level to a controller for the fan; drawing ventilation flow through the compartment and over the machine; determining whether the sensed machine temperature level is above a desired temperature level of the rotary machine, wherein the desired temperature level is determined by the controller, and the controller setting an operational condition of the fan to increase the ventilation flow through the compartment if the sensed machine temperature level is above the desired temperature level.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: January 10, 2006
    Assignee: General Electric Company
    Inventors: Gerald Wilson Grove, Mark David D'Ambruoso, Michael John Barno, William Andrew Parker, David Martin Johnson, Gregory Allan Crum, Stephen Chiaco
  • Patent number: 6918255
    Abstract: A system for cooling at least one gas turbine liquid fuel component located in a high temperature environment to eliminate coking in the component is disclosed. The system includes a sleeve surrounding the liquid fuel component, a device for providing a current of cool air, and a conduit connected between the cool air device and the sleeve to direct the current of cool air into the sleeve to cool the liquid fuel component. The system can also include a manifold connected to the conduit and a plurality of second conduits for connecting the manifold to a plurality of sleeves surrounding a plurality of liquid fuel components, each sleeve being connected to a corresponding second conduit. Each sleeve includes a plurality of spacing devices for centering the sleeve around the at least one liquid fuel component so as to form an annulus between the sleeve and the liquid fuel component through which the current of cool air flows.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 19, 2005
    Assignee: General Electric Company
    Inventors: Howard Jay Kaplan, David Francis Acquavella, Steven Patrick Junquera, David Martin Johnson, Christopher David Miller, Robert Joseph Iasillo, Gregory James Hampson, Kevin Jon O'Dell
  • Publication number: 20040103662
    Abstract: A system for cooling at least one gas turbine liquid fuel component located in a high temperature environment to eliminate coking in the component is disclosed. The system includes a sleeve surrounding the liquid fuel component, a device for providing a current of cool air, and a conduit connected between the cool air device and the sleeve to direct the current of cool air into the sleeve to cool the liquid fuel component. The system can also include a manifold connected to the conduit and a plurality of second conduits for connecting the manifold to a plurality of sleeves surrounding a plurality of liquid fuel components, each sleeve being connected to a corresponding second conduit. Each sleeve includes a plurality of spacing devices for centering the sleeve around the at least one liquid fuel component so as to form an annulus between the sleeve and the liquid fuel component through which the current of cool air flows.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 3, 2004
    Inventors: Howard Jay Kaplan, David Francis Acquavella, Steven Patrick Junquera, David Martin Johnson, Christopher David Miller, Robert Joseph Iasillo, Gregory James Hampson, Kevin Jon O'Dell
  • Patent number: 6082963
    Abstract: A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: July 4, 2000
    Assignee: General Electric Co.
    Inventors: Brendan F. Sexton, Hans M. Knuijt, Sacheverel Q. Eldrid, Albert Myers, Kyle E. Coneybeer, David Martin Johnson, Iain R. Kellock
  • Patent number: 6079943
    Abstract: A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: June 27, 2000
    Assignee: General Electric Co.
    Inventors: Brendan F. Sexton, Hans M. Knuijt, Sacheverel Q. Eldrid, Albert Myers, Kyle E. Coneybeer, David Martin Johnson, Iain R. Kellock
  • Patent number: 5913658
    Abstract: A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. An outer housing surrounds the inner shell sections and includes at least two outer shell sections overlying the inner shell sections. The inner shell sections are releasably connected to one another and the outer shell sections are releasably connected to one another. Upon removing an outer shell section, an access opening is provided through which an uppermost inner shell section is removed. Rollers are provided between the lower outer and inner shell sections so that the lower inner shell section is rotated into the access opening and can be removed through the access opening.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: June 22, 1999
    Assignee: General Electric Co.
    Inventors: Brendan F. Sexton, Hans M. Knuijt, Sacheverel Q. Eldrid, Albert Myers, Kyle E. Coneybeer, David Martin Johnson, Iain R. Kellock
  • Patent number: 5906473
    Abstract: A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: May 25, 1999
    Assignee: General Electric Co.
    Inventors: Brendan F. Sexton, Hans M. Knuijt, Sacheverel Q. Eldrid, Albert Myers, Kyle E. Coneybeer, David Martin Johnson, Iain R. Kellock
  • Patent number: 5779442
    Abstract: A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: July 14, 1998
    Assignee: General Electric Company
    Inventors: Brendan F. Sexton, Hans M. Knuijt, Sacheverel Q. Eldrid, Albert Myers, Kyle E. Coneybeer, David Martin Johnson, Iain R. Kellock
  • Patent number: 5685693
    Abstract: A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: November 11, 1997
    Assignee: General Electric Co.
    Inventors: Brendan F. Sexton, Hans M. Knuijt, Sacheverel Q. Eldrid, Albert Myers, Kyle E. Coneybeer, David Martin Johnson, Iain R. Kellock