Patents by Inventor Joshua Donaldson

Joshua Donaldson 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).

  • Camless engine hydraulic valve actuated system
    Patent number: 7204212
    Abstract: A method and apparatus for hydraulically actuating a gas exchange valve using a low-pressure, substantially constant flow fluid source applied to at least one actuator cylinder piston coupled to the gas exchange valve. The actuator piston slides within the actuator cylinder upon application of pressure from the fluid for actuating the gas exchange valve. The pressure is continuously variable and builds upon application to the cylinder piston until the valve unseats. A pressure sensor is used to monitor the pressure to provide feedback about the operation of system and to provide variable motion control of the gas exchange valve.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: April 17, 2007
    Assignee: Temic Automotive of North America, Inc.
    Inventor: Joshua Donaldson
  • Camless engine hydraulic valve actuated system
    Publication number: 20060150935
    Abstract: A method and apparatus for hydraulically actuating a gas exchange valve using a low-pressure, substantially constant flow fluid source applied to at least one actuator cylinder piston coupled to the gas exchange valve. The actuator piston slides within the actuator cylinder upon application of pressure from the fluid for actuating the gas exchange valve. The pressure is continuously variable and builds upon application to the cylinder piston until the valve unseats. A pressure sensor is used to monitor the pressure to provide feedback about the operation of system and to provide variable motion control of the gas exchange valve.
    Type: Application
    Filed: January 12, 2005
    Publication date: July 13, 2006
    Inventor: Joshua Donaldson