Patents by Inventor Jonathan W. Prusak

Jonathan W. Prusak 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).

  • Engine brake apparatus
    Patent number: 7793624
    Abstract: Apparatus and methods for hydraulic valve actuation of engine valves are disclosed. An exemplary embodiment of the present invention may include a lost motion piston assembly that transfers motion between first and second rocker arms to selectively provide auxiliary engine valve actuation motions to the engine valves for engine operations such as engine braking and exhaust gas recirculation. The lost motion piston assembly may reduce or eliminate transient loads that may otherwise be transmitted to engine valve train elements during the times that lost motions systems are turned on and off for auxiliary valve actuations.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: September 14, 2010
    Assignee: Jacobs Vehicle Systems, Inc.
    Inventors: Robb Janak, Brian L. Ruggiero, Jonathan W. Prusak
  • Engine brake apparatus
    Publication number: 20080196680
    Abstract: Apparatus and methods for hydraulic valve actuation of engine valves are disclosed. An exemplary embodiment of the present invention may include a lost motion piston assembly that transfers motion between first and second rocker arms to selectively provide auxiliary engine valve actuation motions to the engine valves for engine operations such as engine braking and exhaust gas recirculation. The lost motion piston assembly may reduce or eliminate transient loads that may otherwise be transmitted to engine valve train elements during the times that lost motions systems are turned on and off for auxiliary valve actuations.
    Type: Application
    Filed: October 29, 2007
    Publication date: August 21, 2008
    Inventors: Robb Janak, Brian L. Ruggiero, Jonathan W. Prusak