Patents by Inventor David C. Mack

David C. Mack 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).

  • Publication number: 20240082912
    Abstract: This invention in one aspect relates to an iron-based foam usable for an electrochemical device, comprising a composition comprising iron and a refractory element processed to form the iron-based foam having a hierarchical porous structure with self-assembled channels for gas flow reactions and internal space to accommodate volumetric changes on oxidation.
    Type: Application
    Filed: September 12, 2023
    Publication date: March 14, 2024
    Inventors: Jacob Benjamin Mack, Samuel Mark Pennell, David C. Dunand
  • Patent number: 9546724
    Abstract: The present disclosure provides a roller pin for a fuel pump. The roller pin includes a cylindrical body made of a first material extending between a first end and a second end. The roller pin includes an intermediate portion disposed between the first end and the second end of the cylindrical body. The intermediate portion is formed by depositing a second material on the cylindrical body. The roller pin further includes a longitudinal groove extending along the intermediate portion.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: January 17, 2017
    Assignee: Caterpillar Inc.
    Inventors: John W. Unes, David C. Mack, Adam C. Hill
  • Publication number: 20150345448
    Abstract: A flow limiter and filter assembly for a fuel system of an engine includes a flow limiting valve attached to a filter element. The filter element has a large area inlet and a screen of small area outlets. Each of a plurality of quills for the fuel system includes a flow limiter and filter assembly positioned in a quill passage in contact with a limiter seat of a quill body, and the filter element is out of contact with the quill body.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 3, 2015
    Applicant: Caterpillar Inc.
    Inventors: Michael David Gerstner, David C. Mack
  • Patent number: 9181909
    Abstract: A fuel pump is disclosed. The fuel pump includes a housing. Further, the fuel pump includes a rotatable pump shaft disposed within the housing. One end of the rotatable pump shaft is attachable to a gear. The housing also includes a retainer disposed within the housing and located about the pump shaft. The retainer includes a first rim and a second rim that are spaced apart from each other. The retainer also includes a side wall extending between the first and the second rims. Further, the side wall of the retainer defines a first volume and a second volume within the housing. The side wall of the retainer has a plurality of apertures configured to allow a fluid flow from the first volume to the second volume while retaining particulate contaminants larger than a size of the apertures within the first volume.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: November 10, 2015
    Assignee: Caterpillar Inc.
    Inventors: John W. Unes, Eric Krause, Steven R. Meinhart, David C. Mack
  • Publication number: 20150198229
    Abstract: The present disclosure provides a roller pin for a fuel pump. The roller pin includes a cylindrical body made of a first material extending between a first end and a second end. The roller pin includes an intermediate portion disposed between the first end and the second end of the cylindrical body. The intermediate portion is formed by depositing a second material on the cylindrical body. The roller pin further includes a longitudinal groove extending along the intermediate portion.
    Type: Application
    Filed: January 13, 2014
    Publication date: July 16, 2015
    Applicant: Caterpillar Inc.
    Inventors: John W. Unes, David C. Mack, Adam C. Hill
  • Publication number: 20150075498
    Abstract: A fuel pump is disclosed. The fuel pump includes a housing. Further, the fuel pump includes a rotatable pump shaft disposed within the housing. One end of the rotatable pump shaft is attachable to a gear. The housing also includes a retainer disposed within the housing and located about the pump shaft. The retainer includes a first rim and a second rim that are spaced apart from each other. The retainer also includes a side wall extending between the first and the second rims. Further, the side wall of the retainer defines a first volume and a second volume within the housing. The side wall of the retainer has a plurality of apertures configured to allow a fluid flow from the first volume to the second volume while retaining particulate contaminants larger than a size of the apertures within the first volume.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 19, 2015
    Applicant: Caterpillar Inc.
    Inventors: John W. Unes, Eric Krause, Steven R. Meinhart, David C. Mack
  • Patent number: 8202064
    Abstract: A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: June 19, 2012
    Assignee: Caterpillar Inc.
    Inventors: Ye Tian, David C. Mack, Alan R. Stockner
  • Publication number: 20110087113
    Abstract: A system and method for detecting, monitoring and analyzing physiological characteristics. Signals from a subject are acquired from a suite of sensors, such as temperature, carbon dioxide, humidity, light, movement, electromagnetic and vibration sensors, in a passive, non-invasive manner. The signals are processed and physiological characteristics are isolated for analysis. The system and method are to analyze sleep patterns, as well as to prevent bed sores or detect conditions such as illness, restless leg syndrome, periodic leg movement, sleep walking, or sleep apnea. However, numerous other applications of the invention are also disclosed.
    Type: Application
    Filed: August 30, 2010
    Publication date: April 14, 2011
    Applicant: WellAWARE Systems, Inc.
    Inventors: David C. Mack, Steve Kell, Majd Alwan, Robin Felder, Beverly Turner, Sarah Wood
  • Publication number: 20110064588
    Abstract: A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.
    Type: Application
    Filed: November 22, 2010
    Publication date: March 17, 2011
    Applicant: Caterpillar Inc.
    Inventors: David C. Mack, Ye Tian, Alan R. Stockner
  • Patent number: 7857605
    Abstract: A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: December 28, 2010
    Assignee: Caterpillar Inc
    Inventors: Ye Tian, Alan R. Stockner, David C. Mack
  • Patent number: 7785257
    Abstract: A system and method for detecting, monitoring and analyzing physiological characteristics. Signals from a subject are acquired from a suite of sensors, such as temperature, carbon dioxide, humidity, light, movement, electromagnetic and vibration sensors, in a passive, non-invasive manner. The signals are processed and physiological characteristics are isolated for analysis. The system and method are to analyze sleep patterns, as well as to prevent bed sores or detect conditions such as illness, restless leg syndrome, periodic leg movement, sleep walking, or sleep apnea. However, numerous other applications of the invention are also disclosed.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: August 31, 2010
    Assignee: Home Guardian LLC
    Inventors: David C. Mack, Steven W. Kell, Majd Alwan, Robin Felder, Beverly Turner, Sarah Wood
  • Patent number: 7748359
    Abstract: In one aspect, the present disclosure is directed to a tappet assembly for a machine. The assembly may include a tappet body, a pin fixedly mounted in the tappet body, and a substantially cylindrical roller mounted about the pin. The roller may have a substantially cylindrical outer surface with a circumferential dimension and a width dimension, the width dimension being defined by two lateral edges. The roller may be configured to provide rolling contact between the outer surface of the roller and a cam lobe. The outer surface of the roller may be crowned such that at maximum operational loading conditions of the machine a footprint of contact pressure from the cam lobe is spread substantially the full width of outer cylindrical surface of the roller.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: July 6, 2010
    Assignee: Caterpillar Inc.
    Inventors: Bradley E. Bartley, Alan R. Stockner, David C. Mack
  • Patent number: 7691068
    Abstract: System and method that can monitor pulse rate and passively produce a blood pressure measurement and automatically log the data for the user. Additionally, coupling to the Internet or Information Systems expands the options for the early detection of diseases, based on sudden detected changes and trend analyses, and the successful treatment of these patients while reducing the high costs associated with invasive procedures and in-hospital care.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: April 6, 2010
    Assignee: University of Virginia Patent Foundation
    Inventors: Robin A. Felder, Majd Alwan, Steven W. Kell, David C. Mack
  • Patent number: 7590306
    Abstract: A technique is provided for improving digital images by analysis of the sampling rate of the image data. The optimal sampling rate is determined, such as based on the point-spread function of the imaging system, and is compared to the actual pixel sampling rate. Based upon the comparison, the image may be shrunk or sub-sampled to provide the optimal sampling rate that allows for optimal image filtering while accounting for inherent variations in spatial resolution of the images.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: September 15, 2009
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Rakesh Mohan Lal, David C. Mack, Gopal B. Avinash
  • Publication number: 20080275314
    Abstract: A system and method for detecting, monitoring and analyzing physiological characteristics. Signals from a subject are acquired from a suite of sensors, such as temperature, carbon dioxide, humidity, light, movement, electromagnetic and vibration sensors, in a passive, non-invasive manner. The signals are processed and physiological characteristics are isolated for analysis. The system and method are to analyze sleep patterns, as well as to prevent bed sores or detect conditions such as illness, restless leg syndrome, periodic leg movement, sleep walking, or sleep apnea. However, numerous other applications of the invention are also disclosed.
    Type: Application
    Filed: July 7, 2008
    Publication date: November 6, 2008
    Applicant: Home Guardian LLC
    Inventors: David C. Mack, Steve Kell, Majd Alwan, Robin Felder, Beverly Turner, Sarah Wood
  • Publication number: 20080184330
    Abstract: Systems, apparatus, and computer methods are provided for controlling access to advanced medical diagnostic imaging applications based on the login credential of a user and the access policy for that user. All users are categorized based on training, authorization, and status with an identified project. The advanced medical diagnostic imaging applications are configured based on the retrieved access policy for the user.
    Type: Application
    Filed: January 25, 2007
    Publication date: July 31, 2008
    Inventors: Rakesh M. Lal, Laurent Launay, Cheryl R Jones, Toan T. Le, David C. Mack, Helen H. Peng, Xin Wan, Guy G Bernard
  • Patent number: 7396331
    Abstract: A system and method for detecting, monitoring and analyzing physiological characteristics. Signals from a subject are acquired from a suite of sensors, such as temperature, carbon dioxide, humidity, light, movement, electromagnetic and vibration sensors, in a passive, non-invasive manner. The signals are processed, and physiological characteristics are isolated for analysis. The system and method are to analyze sleep patterns, as well as to prevent bed sores or detect conditions such as illness, restless leg syndrome, periodic leg movement, sleep walking, or sleep apnea. However, numerous other applications of the invention are also disclosed.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: July 8, 2008
    Assignee: Home Guardian, LLC
    Inventors: David C. Mack, Steve Kell, Majd Alwan, Robin Felder, Beverly Turner, Sarah Wood
  • Publication number: 20080003122
    Abstract: A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 3, 2008
    Inventors: Ye Tian, Alan R. Stockner, David C. Mack
  • Publication number: 20030045792
    Abstract: A review and analyze protocol is described. The protocol comprises the steps of performing a patient scan to collect scan data to be used in generating an image, performing at least one of a single exam review and a dual exam review of images generated using the scan data, and analyzing an area of interest identified in performing the exam review.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 6, 2003
    Inventors: Beth Ann Heckel, David C. Mack, Toan T. Le
  • Patent number: 6360717
    Abstract: The present invention provides a fuel injection system and method of operating the fuel injection system. The fuel injection system includes at least one hydraulically actuated fuel injector fluidly connected with a source of high pressure actuation fluid. A viscosity sensor determines the viscosity of the hydraulically actuated fuel injector. A controller in communication with the fuel injector and the viscosity sensor is configured to determine the rate of change of the viscosity of the high pressure hydraulic actuation fluid. The supply of high pressure actuated fluid to the fuel injector is based, at least in part, on the rate of change of the determined viscosity of the high pressure actuation fluid.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: March 26, 2002
    Assignee: Caterpillar Inc.
    Inventors: David Y. Chang, David C. Mack