Patents by Inventor David Ridgway

David Ridgway 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: 10850530
    Abstract: In one example, a liquid delivery and gas removal system for a printhead. The system includes a pump to provide a liquid at a positive pressure. The system also includes a filter fluidically coupled to the pump to receive the pressurized liquid at an upstream side, at a first pressure push the liquid through the filter to a downstream side, and at a higher second pressure push gas bubbles in the liquid through the filter to the downstream side. The system further includes a vent having a gas-permeable membrane. A wet side of the membrane is fluidically coupled to the downstream side and to a printhead. A vacuum is applied to a dry side of the membrane.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: December 1, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Ridgway Otis, Jr., Si-lam Julius Choy, Kevin Edward Swier, David N. Olsen
  • Publication number: 20200079101
    Abstract: In one example, a liquid delivery and gas removal system for a printhead. The system includes a pump to provide a liquid at a positive pressure. The system also includes a filter fluidically coupled to the pump to receive the pressurized liquid at an upstream side, at a first pressure push the liquid through the filter to a downstream side, and at a higher second pressure push gas bubbles in the liquid through the filter to the downstream side. The system further includes a vent having a gas-permeable membrane. A wet side of the membrane is fluidically coupled to the downstream side and to a printhead. A vacuum is applied to a dry side of the membrane.
    Type: Application
    Filed: October 27, 2015
    Publication date: March 12, 2020
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventor: David Ridgway Otis Jr.
  • Publication number: 20180345391
    Abstract: A saw assembly for cutting a metal workpiece and method for cutting the same holds a metal workpiece at a substantially vertical or a slightly tilted orientation relative to vertical axis while cutting a cross section of the metal workpiece. The saw assembly includes a frame for retaining and cutting the workpiece. The workpiece to be cut slides laterally across low friction support bars and rollers on the frame to achieve a desired sawing position relative to a saw subassembly. A blade assembly is raised and lowered through a saw pulley system guided by guiderails and blade assembly mounting mechanism.
    Type: Application
    Filed: June 1, 2018
    Publication date: December 6, 2018
    Inventors: David A. Ridgway, Joshua R. Starnes
  • Patent number: 7768548
    Abstract: The Improved Mobile Digital Video Recorder (IMDVR) system is a ruggedized, multiple camera video and audio recording system that is installed within a public transit vehicle to record, store, and manage an integrated data stream of data captured within and exterior to the transit vehicle. The system is focused on multiple person vehicles and the capture of an integrated data stream for use in transit security, liability, and evidentiary processes.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: August 3, 2010
    Inventors: William Bradford Silvernail, Jody Snow, John Glenn, David Ridgway, Joseph Huang, Christopher Church, Olivier Singla, Paul Kehle
  • Publication number: 20070035632
    Abstract: The Improved Mobile Digital Video Recorder (IMDVR) system is a ruggedized, multiple camera video and audio recording system that is installed within a public transit vehicle to record, store, and manage an integrated data stream of data captured within and exterior to the transit vehicle. The system is focused on multiple person vehicles and the capture of an integrated data stream for use in transit security, liability, and evidentiary processes.
    Type: Application
    Filed: November 9, 2005
    Publication date: February 15, 2007
    Inventors: William Silvernail, Jody Snow, John Glenn, David Ridgway, Joseph Huang, Christopher Church, Olivier Singla, Paul Kehle