Patents Represented by Law Firm Roylance, Berdo & Goodman, L.L.P.
  • Filter bypass valve having adjustable spring biasing force
    Patent number: 6117312
    Abstract: A filter device has a bypass valve which releases a fluid-conveying path to an outlet when a filter element becomes clogged. The bypass valve includes a closure part on which at least one closure spring acts. To adjust the spring pretension and the opening force for the closure part, an adjusting device is provided for adjusting the opening force of the closure spring. The filter device can be economically adapted without any structural modifications to very different applications in a predetermined pressure range.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: September 12, 2000
    Assignee: Hydac Filtertechnik GmbH
    Inventors: Harald Mees, Michael Sakraschinsky