Patents by Inventor Dennis E. Walker

Dennis E. Walker 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).

  • Methods for remote installation of devices for reducing drag and vortex induced vibration
    Patent number: 6994492
    Abstract: Methods for remotely installing vortex-induced vibration (VIV) reduction and drag reduction devices on elongated structures in flowing fluid environments. The devices installed can include clamshell-shaped strakes, shrouds, fairings, sleeves and flotation modules.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: February 7, 2006
    Assignee: Shell Oil Company
    Inventors: David Wayne McMillan, Stephen P. Armstrong, Dennis E. Walker
  • Apparatus for remote installation of devices for reducing drag and vortex induced vibration
    Patent number: 6928709
    Abstract: Apparatus and methods for remotely installing vortex-induced vibration (VIV) reduction and drag reduction devices on elongated structures in flowing fluid environments. The apparatus is a tool for transporting and installing the devices. The devices installed can include clamshell-shaped strakes, shrouds, fairings, sleeves and flotation modules.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: August 16, 2005
    Assignee: Shell Oil Company
    Inventors: David Wayne McMillan, Stephen P. Armstrong, Dennis E. Walker
  • Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration
    Publication number: 20030213113
    Abstract: Apparatus and methods for remotely installing vortex-induced vibration (VIV) reduction and drag reduction devices on elongated structures in flowing fluid environments. The apparatus is a tool for transporting and installing the devices. The devices installed can include clamshell-shaped strakes, shrouds, fairings, sleeves and flotation modules.
    Type: Application
    Filed: March 6, 2003
    Publication date: November 20, 2003
    Inventors: David Wayne McMillan, Stephen P. Armstrong, Dennis E. Walker
  • Battery select circuitry and level translator for a digital watch
    Patent number: 4015420
    Abstract: A battery select circuit and level translator in a digital watch; the battery select circuit uses the voltage from a single battery to power a digital watch's oscillator and high frequency dividers and uses the voltage from two batteries when the watch user desires the watch's horological information to be displayed on the display devices. Also, when only the voltage of a single battery is required, i.e., to power the digital watch's oscillator and high frequency dividers, the power switch causes the voltage from a first battery to be used during the 12 hour A. M. period and then switches to use the voltage from a second battery during the 12 hour P. M. period; thereby causing both batteries to wear out at the same rate.The level translator which includes level shifters shifts or extends the voltage from the oscillator and high frequency dividers to a higher voltage level to clock the low frequency watch logic.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: April 5, 1977
    Assignee: Hughes Aircraft Company
    Inventor: Dennis E. Walker