Patents by Inventor Brant M. Fredrickson

Brant M. Fredrickson 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).

  • Remotely actuated multiple pressure direct acting relief valve
    Patent number: 6837266
    Abstract: A multiple pressure direct acting relief valve is disclosed. The multiple pressure relief valve comprises an actuating cylinder, a relief valve and an adjustment screw interconnecting the actuating cylinder and the relief valve. The relief valve includes a low pressure spring which biases a poppet valve arrangement permitting the poppet valve arrangement to be actuatable at a first pre-determined pressure. The actuating cylinder includes a piston that is biased by a high pressure spring causing an additional compressive force to be applied to the poppet valve arrangement through an actuating rod received through the adjustment screw. When pressure is applied to the piston within the actuating cylinder, an additional compressive force is applied by the high pressure spring and the actuator rod to the poppet valve arrangement causing the poppet valve arrangement to be actuatable at a second pre-determined pressure.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: January 4, 2005
    Assignee: Permco, Inc.
    Inventors: Brant M. Fredrickson, Joel B. Aukerman, Alan E. Smallsreed, Richard T. Conner, Richard A. Olszewski
  • Remotely actuated multiple pressure direct acting relief valve
    Publication number: 20030178067
    Abstract: A multiple pressure direct acting relief valve is disclosed. The multiple pressure relief valve comprises an actuating cylinder, a relief valve and an adjustment screw interconnecting the actuating cylinder and the relief valve. The relief valve includes a low pressure spring which biases a poppet valve arrangement permitting the poppet valve arrangement to be actuatable at a first pre-determined pressure. The actuating cylinder includes a piston that is biased by a high pressure spring causing an additional compressive force to be applied to the poppet valve arrangement through an actuating rod received through the adjustment screw. When pressure is applied to the piston within the actuating cylinder, an additional compressive force is applied by the high pressure spring and the actuator rod to the poppet valve arrangement causing the poppet valve arrangement to be actuatable at a second pre-determined pressure.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Permco, Inc.
    Inventors: Brant M. Fredrickson, Joel B. Aukerman, Alan E. Smallsreed, Richard T. Conner, Richard A. Olszewski