Patents by Inventor Todd Prinsen

Todd Prinsen 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).

  • Soft ventable relief valve
    Patent number: 7467642
    Abstract: A pilot operated pressure valve which limits the rate of pressure rise and substantially eliminates excessive system and tank pressure spikes. Because the pilot ball downstream of the damping orifice is held off the pilot seat in the normal starting condition by a pilot return spring, the main piston will open immediately when system pressure overcomes the low bias pressure of the main spring. A pilot pressure bypass port, which selectively deactivates the pilot chamber features, may also be included.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: December 23, 2008
    Assignee: Sun Hydraulics Corp.
    Inventors: Todd Prinsen, Bernd Zahe
  • Soft ventable relief valve
    Publication number: 20060201554
    Abstract: A pilot operated pressure valve which limits the rate of pressure rise and substantially eliminates excessive system and tank pressure spikes. Because the pilot ball downstream of the damping orifice is held off the pilot seat in the normal starting condition by a pilot return spring, the main piston will open immediately when system pressure overcomes the low bias pressure of the main spring. A pilot pressure bypass port, which selectively deactivates the pilot chamber features, may also be included.
    Type: Application
    Filed: February 21, 2006
    Publication date: September 14, 2006
    Applicant: Sun Hydraulics Corp.
    Inventors: Todd Prinsen, Bernd Zahe