Patents by Inventor Roland Liedtke

Roland Liedtke 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).

  • Device for manipulating submerged-operating units
    Patent number: 6036246
    Abstract: A device (10) for manipulating submerged-operating units (11), such as submersible motor-driven pumps, submersible motor-driven stirrers and the like, has a hoist, by means of which the unit (11) can be brought into a submerged working position and a surfaced maintenance position, wherein the unit (11) is provided with a lifting strap (25) of a coupling unit, whose coupling element (60, 60'), which can be brought into and out of engagement with the lifting strap (25), is provided on a pulling element (48) of the hoist.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: March 14, 2000
    Assignee: ITT Flygt AB
    Inventor: Roland Liedtke