Patents by Inventor Yefim Levin

Yefim Levin 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).

  • Linear fan
    Patent number: 7744340
    Abstract: The linear fan comprises blades that are fixed onto a flexible transmission engaging leading and follower pulleys. Each blade has cylindrical shanks to facilitate swivel fixation. The veer of the blades is provided with directive disks.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: June 29, 2010
    Inventors: Yefim Levin, Vadim Levin
  • Linear fan
    Publication number: 20090028689
    Abstract: The linear fan comprises blades that are fixed onto a flexible transmission engaging leading and follower pulleys. Each blade has cylindrical shanks to facilitate swivel fixation. The veer of the blades is provided with directive disks. In another embodiment, position of the blades is permanent with respect to direction of motion of the transmissions and connection of the blades with the transmissions is provided with prismatic shanks in such a way that outlines of cross section of the blades are symmetrical with respect to direction of motion of the transmission. This fan also comprises the guide vanes that are fixed in one of two positions, the first position provides forward direction of operation and the second one assures reverse operation of the fan.
    Type: Application
    Filed: April 25, 2006
    Publication date: January 29, 2009
    Inventors: Yefim Levin, Vadim Levin