Patents by Inventor Thomas K. Johnson

Thomas K. 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).

  • Publication number: 20240125385
    Abstract: A zero turning radius mower park brake system includes a park brake pawl on a transmission which engages a park brake to a pair of independently driven traction wheels. A park brake link may be pivotably mounted to the park brake pawl and connected to a left steering lever and a right steering lever. The park brake link may pivot while moving the park brake pawl forward to a park brake engaged position if only one of the steering levers is moved outward from a neutral traction drive position.
    Type: Application
    Filed: October 18, 2022
    Publication date: April 18, 2024
    Inventors: JOSEAN J. MARTINEZ ACOSTA, THOMAS M. MESSINA, KENNETH M. REEP, WILLIAM P. JOHNSON, DAVID W. GEIGER, Margaret K. Martin
  • Patent number: 11912013
    Abstract: Ink-based digital printing systems useful for ink printing include a rotatable charge-retentive reimageable surface layer configured to receive a layer of fountain solution. The fountain solution is carried to the charge retentive surface by a fog or mist including fountain solution aerosol particles, dispersed gas particles, and charge directors that impart charge to the fountain solution aerosol particles. The charge-retentive reimageable surface may be charged to a uniform potential, and selectively discharged using an ROS according to image data to form an electrostatic latent image. The charged fountain solution adheres to portions of the charge-retentive reimageable surface according to the electrostatic latent image to form a fountain solution image thereon. The fountain solution image can be partially transferred to an imaging blanket, where the fountain solution image is inked. The resulting ink image may be transferred to a print substrate.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: February 27, 2024
    Assignee: Xerox Corporation
    Inventors: Kathryn F. Murphy, Thomas Wunderer, Anne Plochowietz, David K. Biegelsen, Joerg Martini, David Mathew Johnson, Palghat S. Ramesh
  • Patent number: 11686575
    Abstract: Methods and systems for determining the integrity of a manufactured board are disclosed. An example system includes a testing platform configured to secure the manufactured board, a sensor configured to measure a parameter corresponding to a flatness of a surface of the board, and a controller. The controller is configured to identify regions on the surface corresponding to one of a peak or a valley based on the parameter, and calculate a score representing the integrity of the manufactured board based on the identified peaks and valleys. The controller adjusts a flow rate, a pressure, a temperature, and position of a deposited substance in a manufacturing process based on a comparison with a height of the peak and/or a depth of the valley to stored peak heights and/or valley depths. In some examples, a mechanical tester determines a compressive strength and a density of the board at the identified regions.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: June 27, 2023
    Assignee: Stepan Company
    Inventors: Thomas K. Johnson, David J. Norberg, Daniel Yocius
  • Publication number: 20210278202
    Abstract: Methods and systems for determining the integrity of a manufactured board are disclosed. An example system includes a testing platform configured to secure the manufactured board, a sensor configured to measure a parameter corresponding to a flatness of a surface of the board, and a controller. The controller is configured to identify regions on the surface corresponding to one of a peak or a valley based on the parameter, and calculate a score representing the integrity of the manufactured board based on the identified peaks and valleys. The controller adjusts a flow rate, a pressure, a temperature, and position of a deposited substance in a manufacturing process based on a comparison with a height of the peak and/or a depth of the valley to stored peak heights and/or valley depths. In some examples, a mechanical tester determines a compressive strength and a density of die board at the identified regions.
    Type: Application
    Filed: May 17, 2021
    Publication date: September 9, 2021
    Inventors: Thomas K. Johnson, JR., David J. Norberg, Daniel Yocius
  • Patent number: 11009342
    Abstract: Methods and systems for determining the integrity of a manufactured board are disclosed. An example system includes a testing platform configured to secure the manufactured board, a sensor configured to measure a parameter corresponding to a flatness of a surface of the board, and a controller. The controller is configured to identify regions on the surface corresponding to one of a peak or a valley based on the parameter, and calculate a score representing the integrity of the manufactured board based on the identified peaks and valleys. The controller adjusts a flow rate, a pressure, a temperature, and position of a deposited substance in a manufacturing process based on a comparison with a height of the peak and/or a depth of the valley to stored peak heights and/or valley depths. In some examples, a mechanical tester determines a compressive strength and a density of the board at the identified regions.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: May 18, 2021
    Assignee: Stepan Company
    Inventors: Thomas K. Johnson, Jr., David J. Norberg, Daniel Yocius
  • Publication number: 20200217652
    Abstract: Methods and systems for determining the integrity of a manufactured board are disclosed. An example system includes a testing platform configured to secure the manufactured board, a sensor configured to measure a parameter corresponding to a flatness of a surface of the board, and a controller. The controller is configured to identify regions on the surface corresponding to one of a peak or a valley based on the parameter, and calculate a score representing the integrity of the manufactured board based on the identified peaks and valleys. The controller adjusts a flow rate, a pressure, a temperature, and position of a deposited substance in a manufacturing process based on a comparison with a height of the peak and/or a depth of the valley to stored peak heights and/or valley depths. In some examples, a mechanical tester determines a compressive strength and a density of the board at the identified regions.
    Type: Application
    Filed: August 3, 2018
    Publication date: July 9, 2020
    Inventors: Thomas K. Johnson, Jr., David J. Norberg, Daniel Yocius
  • Publication number: 20170074909
    Abstract: A method of safe to mate testing includes providing a file of netlist signals where each signal defines a first connection to one or more components of a unit under test, connecting a first terminal of a measuring device to a first netlist signal and connecting a second terminal of the measuring device to a second netlist signal, performing a plurality of first resistive measurements by applying power having a first polarity between the first and second netlist signals, performing at least one second resistive measurement by applying power having a second polarity to the first and second netlist signals, and recording an average of the first resistive measurements and, if the second polarity measurement yields a negative result, an indication that a reactive load is connected between the first and second netlist signals.
    Type: Application
    Filed: September 15, 2015
    Publication date: March 16, 2017
    Inventors: PHUC H. NGUYEN, MICHELLE B. SCOTT, THOMAS K. JOHNSON, YUKLUN LEUNG, MICHAEL R. LIN
  • Publication number: 20030227913
    Abstract: One aspect of the present invention provides a process and a system for emulating a synchronous transport signal across a packet-oriented network. The process includes the steps of receiving a data representative of a synchronous transport signal at each of several channel processors, creating a number of packets, each having a header conforming to the protocol of a packet-oriented network, and transmitting the packets via the packet-oriented network. In addition, the process also includes the steps of storing each of these packets in a set of memory elements associated with each of the channel processors and adjusting timing of the synchronous transport signal based on the packet-count telemetry associated with each of the memory elements.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 11, 2003
    Applicant: LITCHFIELD COMMUNICATIONS, INC.
    Inventors: Edward H. Hallman, Leigh David Danenberg, Donald Richard Brown, Thomas K. Johnson
  • Patent number: 4822013
    Abstract: An apparatus for securing a component, comprising a casing 12 having two portions 12a, 12b between which a portion of the component 38 is positioned. The casing 12 is provided with end walls 34,36 which extend towards the component but terminate just short thereof by a predetermined amount. The position of the component 38 is fixed relative to features 28 provided on the casing 12 prior to injecting a location material into the interior of said casing 12. The material preferably has a high resistance to extrusion and acts to locate the component 38 during machining.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: April 18, 1989
    Assignee: Rolls-Royce plc
    Inventor: Thomas K. Johnson
  • Patent number: D266457
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: October 12, 1982
    Inventor: Thomas K. Johnson