Patents by Inventor Ryszard Piekarsky

Ryszard Piekarsky 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).

  • Axial fan
    Patent number: 6715989
    Abstract: The present invention relates to an axial fan of the type comprising a hub, a plurality of arms extending radially outwardly from the hub and blade members, each blade member being secured to its respective arm, wherein the arms consist of flexible elements with a bending stiffness such that, in operation, the blade members are inclined at an angle at which the centrifugal forces acting on the blade members neutralize the traction forces acting on same. The load variations and ensuing vibrations are thus substantially reduced, thereby increasing the service life of the fan blades and the drive mechanism.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: April 6, 2004
    Assignee: Diandra S.A.
    Inventors: Roberto Eduardo Mosiewicz, Ryszard Piekarsky
  • Axial fan
    Publication number: 20030002984
    Abstract: The present invention relates to an axial fan of the type comprising a hub, a plurality of arms extending radially outwardly from the hub and blade members, each blade member being secured to its respective arm, wherein the arms consist of flexible elements with a bending stiffness such that, in operation, the blade members are inclined at an angle at which the centrifugal forces acting on the blade members neutralize the traction forces acting on same.
    Type: Application
    Filed: October 5, 2001
    Publication date: January 2, 2003
    Inventors: Robert Eduardo Mosiewicz, Ryszard Piekarsky