Patents by Inventor Darren Lee Hallman
Darren Lee Hallman 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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Publication number: 20120029838Abstract: A system and method are provided to monitor the health of a wind turbine gearbox. The system includes a plurality of sensors coupled to the wind turbine gearbox and a controller coupled to the plurality of sensors. The controller is configured to acquire vibration information from a vibration sensor, acquire a tachometer signal, convert the tachometer signal and the vibration information into a cycle domain signal, and perform an order analysis on the cycle domain signal, the order analysis providing information that identifies potential and actual damage within the wind turbine gearbox.Type: ApplicationFiled: July 30, 2010Publication date: February 2, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: DARREN LEE HALLMAN, HUAGENG LUO, ROBERT ARVIN HEDEEN, MICHAEL SIRAK, DENNIS RICHTER
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Publication number: 20120025526Abstract: A system and method are provided to monitor the health and performance of a wind turbine gearbox. A plurality of sensors coupled to the wind turbine gearbox provide input to a controller. The controller generates output information that includes performance and health information of the wind turbine gearbox based on the input received from each of the sensors.Type: ApplicationFiled: July 30, 2010Publication date: February 2, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: HUAGENG LUO, DARREN LEE HALLMAN, ROBERT ARVIN HEDEEN, MICHAEL SIRAK, DENNIS RICHTER
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Publication number: 20120028756Abstract: A planetary gear system and a method of fabricating same. The planetary gear system includes at least one planet gear, at least one planet pin receiving the at least one planet gear, and a carrier. The carrier itself includes at least one carrier opening for accommodating the at least planet gear, at least one planet pin opening for receiving the at least one planet pin, and at least one flex portion within a wall of the carrier for providing enhanced compliance to the carrier in response to force directed on the at least one planet gear.Type: ApplicationFiled: June 8, 2011Publication date: February 2, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Fulton Jose Lopez, Daniel Jason Erno, Darren Lee Hallman, Bugra Han Ertas, Robert Michael Zirin, Michael John Wittbrodt
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Publication number: 20120028755Abstract: A pin for coupling a planet gear to a carrier in a planetary gear system is disclosed. The pin includes a first end, a second end, and an outer surface extending between the first end and the second end. In some embodiments, the pin further includes means for modifying the compliance of the pin at an interface between the pin and the carrier. In other embodiments, the pin further include a compliance feature defined in the outer surface, the compliance feature allowing greater compliance of the pin in the tangential direction than in the radial direction.Type: ApplicationFiled: August 16, 2011Publication date: February 2, 2012Applicant: General Electric CompanyInventors: Daniel Jason Erno, Darren Lee Hallman, Fulton Jose Lopez
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Publication number: 20120027596Abstract: A planetary gear system is disclosed. The planetary gear system includes a carrier, a planet gear defining a central planet axis, and a pin coupling the planet gear to the carrier. The planetary gear system additionally includes a bearing disposed between the planet gear and the pin. The bearing includes a plurality of rolling elements. Each of the rolling elements is in contact with an inner race and an outer race. The planetary gear system further includes a resilient member. The resilient member is disposed between one of the inner race and the pin or the outer race and the planet gear.Type: ApplicationFiled: August 16, 2011Publication date: February 2, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Fulton Jose Lopez, Darren Lee Hallman, Bugra Han Ertas, Robert Michael Zirin
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Publication number: 20100113210Abstract: A compound planetary gear transmission unit includes a second stage with axially staggered planets.Type: ApplicationFiled: October 30, 2008Publication date: May 6, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Fulton Jose Lopez, Aniruddha Dattatraya Gadre, Darren Lee Hallman
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Patent number: 7693264Abstract: A system for controlling a gas load imposed upon a high vacuum chamber includes a first chamber enclosing a high vacuum and positioned within an ambient environment, a second chamber enclosing a gas and positioned within the ambient environment adjacent to the first chamber, and a rotatable shaft having a first portion extending into the first chamber and a second portion extending into the second chamber. A ferrofluid seal is positioned about the rotatable shaft and positioned between the first portion and the second portion and the ferrofluid seal fluidically separates the first chamber from the second chamber. A control unit is attached to the second chamber and configured to control the gas enclosed in the second chamber such that a gas load in the first chamber is reduced.Type: GrantFiled: November 7, 2006Date of Patent: April 6, 2010Assignee: General Electric CompanyInventors: Aniruddha Gadre, Darren Lee Hallman, Paul M. Ratzmann, Richard Michael Roffers, John Scott Price
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Patent number: 7671593Abstract: A system for isolating vibration and reducing acoustic noise in the RF coil of an MR imaging apparatus is presented. The system positions an RF conductor in its operative position proximate to an RF support form. The RF conductor is sandwiched between a vibration decoupling layer and a mass loading layer. The vibration decoupling layer is affixed to the RF support form so that the vibration decoupling layer is positioned between the RF conduit and the RF support form while the mass loading layer is located exterior of the RF conductor. By this arrangement, the acoustic energy is decoupled from the RF support form by the vibration decoupling layer while the vibration is reduced by the mass loading layer located exterior of the RF conductor.Type: GrantFiled: June 15, 2006Date of Patent: March 2, 2010Assignee: General Electric CompanyInventors: David M. Goldhaber, Darren Lee Hallman, Anton Max Linz
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Publication number: 20090098003Abstract: A twin screw pump includes a pair of rotors disposed inside a casing having an inlet and an outlet. Each rotor includes a set of threads disposed on a portion of an outer surface of a shaft. A first bearing is coupled at a first end of the shaft and a second bearing is coupled at a second end of the shaft. The first and second bearings are not separated by one or more seals. The first and second bearings are configured for being lubricated by the liquid medium of the process fluid when the twin screw pump is in an operational mode.Type: ApplicationFiled: October 11, 2007Publication date: April 16, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Vasanth Srinivasa Kothnur, Michael Vincent Drexel, David Deloyd Anderson, Darren Lee Hallman, Ronghai Qu, Hrishikesh Vishvas Deo, Farshad Ghasripoor
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Patent number: 7519158Abstract: A system for mitigating a gas load imposed upon a high vacuum chamber, thereby reducing the overall pressure, includes a device mounted onto a rotating gantry. The device has a first chamber enclosing a high vacuum and a first region in which anode bearings are positioned. A rotatable shaft has a first portion extending into the first chamber and a second portion extending into the first region. A ferrofluid seal is positioned about the rotatable shaft and positioned between the first portion and the second portion, the ferrofluid seal fluidically separating the first chamber from the first region. At least one pressure-reducing unit is fluidically connected to the first chamber.Type: GrantFiled: December 12, 2006Date of Patent: April 14, 2009Assignee: General Electric CompanyInventors: Aniruddha Dattatraya Gadre, Darren Lee Hallman, John Scott Price, Paul M. Ratzmann, Richard Michael Roffers, Walter John Smith
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Publication number: 20080278151Abstract: A method for inspecting an internal cavity in a part is provided. The method includes inserting a probe into the internal cavity. The method also includes controlling movement of the probe using a defined scan path to scan the probe over a region of interest in the internal cavity. The method also includes applying multiple multifrequency excitation signals to the probe to generate a number of multifrequency response signals. The multifrequency excitation signals are applied at multiple positions within the internal cavity. The method further includes performing a multifrequency phase analysis on the multifrequency response signals to inspect the internal cavity.Type: ApplicationFiled: May 7, 2007Publication date: November 13, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Changting Wang, Shridhar Champaknath Nath, Weston Blaine Griffin, Michael Wayne Fields, Darren Lee Hallman, Abdul Rahman Abdallah Al-Khalidy
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Publication number: 20080137811Abstract: A system for mitigating a gas load imposed upon a high vacuum chamber, thereby reducing the overall pressure, includes a device mounted onto a rotating gantry. The device has a first chamber enclosing a high vacuum and a first region in which anode bearings are positioned. A rotatable shaft has a first portion extending into the first chamber and a second portion extending into the first region. A ferrofluid seal is positioned about the rotatable shaft and positioned between the first portion and the second portion, the ferrofluid seal fluidically separating the first chamber from the first region. At least one pressure-reducing unit is fluidically connected to the first chamber.Type: ApplicationFiled: December 12, 2006Publication date: June 12, 2008Inventors: Aniruddha Dattatraya Gadre, Darren Lee Hallman, John Scott Price, Paul M. Ratzmann, Richard Michael Roffers, Walter John Smith
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Publication number: 20080107236Abstract: A system for controlling a gas load imposed upon a high vacuum chamber includes a first chamber enclosing a high vacuum and positioned within an ambient environment, a second chamber enclosing a gas and positioned within the ambient environment adjacent to the first chamber, and a rotatable shaft having a first portion extending into the first chamber and a second portion extending into the second chamber. A ferrofluid seal is positioned about the rotatable shaft and positioned between the first portion and the second portion and the ferrofluid seal fluidically separates the first chamber from the second chamber. A control unit is attached to the second chamber and configured to control the gas enclosed in the second chamber such that a gas load in the first chamber is reduced.Type: ApplicationFiled: November 7, 2006Publication date: May 8, 2008Inventors: Aniruddha Gadre, Darren Lee Hallman, Paul M. Ratzmann, Richard Michael Roffers, John Scott Price
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Publication number: 20070295361Abstract: A spray device for a dishwasher is provided. The spray device includes a hub and a first spray arm mounted to the hub and having a first set of nozzles configured to introduce a solvent within the dishwasher in a first mode of operation. The spray device also includes a second spray arm mounted to the hub and having a second set of nozzles configured to introduce the solvent within the dishwasher in a second mode of operation, wherein the second spray arm is transverse to the first spray arm.Type: ApplicationFiled: June 27, 2006Publication date: December 27, 2007Inventors: Ramasamy Thiyagarajan, Chetan Sharadchandra Tulapurkar, Darren Lee Hallman
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Publication number: 20070290686Abstract: A system for isolating vibration and reducing acoustic noise in the RF coil of an MR imaging apparatus is presented. The system positions an RF conductor in its operative position proximate to an RF support form. The RF conductor is sandwiched between a vibration decoupling layer and a mass loading layer. The vibration decoupling layer is affixed to the RF support form so that the vibration decoupling layer is positioned between the RF conduit and the RF support form while the mass loading layer is located exterior of the RF conductor. By this arrangement, the acoustic energy is decoupled from the RF support form by the vibration decoupling layer while the vibration is reduced by the mass loading layer located exterior of the RF conductor.Type: ApplicationFiled: June 15, 2006Publication date: December 20, 2007Inventors: David M. Goldhaber, Darren Lee Hallman, Anton Max Linz
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Patent number: 7308808Abstract: The present invention provides an article cleaning apparatus comprising an air management mechanism, a cleaning basket assembly, a fluid regeneration device, a working fluid device, a clean fluid device, and a controller. The working fluid device is coupled to the fluid regeneration device, the cleaning basket assembly, and the air management mechanism. The clean fluid device is coupled to the cleaning basket assembly and the fluid regeneration device. The controller is coupled to the air management mechanism, the cleaning basket assembly, the working fluid device, the regeneration device, and the clean fluid device. The controller is configured to control a cleaning process. The present invention also provides a method for performing the cleaning process.Type: GrantFiled: April 22, 2002Date of Patent: December 18, 2007Assignee: General Electric CompanyInventors: Darren Lee Hallman, David Joseph Najewicz, Sung Jin Kim, Andrew Denise Varghese, Thomas Joseph Fyvie, Teresa Grocela-Rocha, Vanita Mani, Warren Frank Bessler
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Patent number: 7210182Abstract: Method and apparatus for recovering and purifying a solvent used in an article cleaning appliance are provided. The method allows passing solvent-based cleaning fluid from a wash basket through a coarse filter configured to remove relatively large particulates from the cleaning fluid. The method further allows passing cleaning fluid from the coarse filter through a particulate filter configured to remove relatively fine particulates from the cleaning fluid. An aqueous phase that may be present in the cleaning fluid is separated by decanting and coalescing through a separator/filter assembly. The cleaning fluid may then be passed through a regeneration cartridge for removing any water that may remain in the cleaning fluid, and for adsorbing organic contaminants that may be present in the cleaning fluid. Recovered solvent may be stored in a tank for subsequent use in a cleaning process performed by the appliance.Type: GrantFiled: December 30, 2002Date of Patent: May 1, 2007Assignee: General Electric CompanyInventors: Thomas Joseph Fyvie, Darren Lee Hallman, Teresa Grocela Rocha, Philip Alexander Shoemaker
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Publication number: 20040113622Abstract: A control instrumentation system is provided for active vibration reduction in an open MRI system. The control instrumentation system comprises a sensor coupled to a post of the open MRI system for detecting vibration signals and converting the vibration signal to a corresponding electrical signal, a digital signal processor implementing a control algorithm to process the electrical signal to generate a corresponding control signal and an actuator receiving the control signal and using the control signal to minimize the vibration of the system.Type: ApplicationFiled: December 13, 2002Publication date: June 17, 2004Inventors: Huageng Luo, Daniel Arthur Staver, Darren Lee Hallman, Walter John Smith
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Publication number: 20040045096Abstract: A solvent vapor sensor for determining amounts of solvent vapor flowing during a solvent dry cleaning process is provided. The solvent cleaning process utilizes a solvent based cleaning fluid primarily made up of cyclic siloxane solvent. The solvent vapor sensor, i.e., a chemical specific sensor, may be configured in various forms, such as a spectroscopic sensor, a piezo-based sensor, a strain-gauge based sensor, and a capacitive sensor.Type: ApplicationFiled: September 8, 2003Publication date: March 11, 2004Applicant: General Electric CompanyInventors: Vanita Mani, Darren Lee Hallman, Thomas Joseph Fyvie, James Claude Carnahan
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Publication number: 20030196277Abstract: The present invention provides an article cleaning apparatus comprising an air management mechanism, a cleaning basket assembly, a fluid regeneration device, a working fluid device, a clean fluid device, and a controller. The working fluid device is coupled to the fluid regeneration device, the cleaning basket assembly, and the air management mechanism. The clean fluid device is coupled to the cleaning basket assembly and the fluid regeneration device. The controller is coupled to the air management mechanism, the cleaning basket assembly, the working fluid device, the regeneration device, and the clean fluid device. The controller is configured to control a cleaning process. The present invention also provides a method for performing the cleaning process.Type: ApplicationFiled: April 22, 2002Publication date: October 23, 2003Applicant: General Electric CompanyInventors: Darren Lee Hallman, David Joseph Najewicz, Sung Jin Kim, Andrew Denise Varghese, Thomas Joseph Fyvie, Teresa Grocela-Rocha, Vanita Mani, Warren Frank Bessler