Patents by Inventor John Harrison Burrow

John Harrison Burrow 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).

  • Rotary damper
    Patent number: 6899208
    Abstract: A damping device utilizing a viscous fluid to stabilize rotational movement of a shaft. The damper includes a cylindrical body with multiple chambers containing a viscous fluid and a rotor with multiple vanes rotatably mounted within the body. The rotor has a hollow cylindrical center with passages that allow communication of fluid during rotational movement between the compressing and expanding chambers. A centrally located and axially adjustable valve acts to restrict the flow of fluid through the passages and thereby adjust the damping effect of the damper.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: May 31, 2005
    Inventors: Charles Nicholas VanValkenburgh, John Harrison Burrow
  • Rotary damper
    Publication number: 20030111308
    Abstract: A damping device utilizing a viscous fluid to stabilize rotational movement of a shaft. The damper includes a cylindrical body with multiple chambers containing a viscous fluid and a rotor with multiple vanes rotatably mounted within the body. The rotor has a hollow cylindrical center with passages that allow communication of fluid during rotational movement between the compressing and expanding chambers. A centrally located and axially adjustable valve acts to restrict the flow of fluid through the passages and thereby adjust the damping effect of the damper.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 19, 2003
    Inventors: Charles Nicholas VanValkenburgh, John Harrison Burrow