Patents by Inventor Robert Fridmann

Robert Fridmann 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).

  • Patent number: 11845638
    Abstract: A method for installing an elevator system in an elevator shaft of a building in its construction phase uses a machine platform displaceable in the shaft along car guide rails and having a drive machine for moving a suspended elevator car to adapt a usable lifting height of the elevator car to an increasing height of the building by lifting the machine platform to a higher level. The method includes lowering a pre-assembled elevator unit into the shaft by a lifting device, using guide devices that are either mounted on the elevator unit and cooperate with stationarily fixed alignment elements in the shaft, or are fixed in the shaft and cooperate with alignment elements on the elevator unit, to align the unit in a position suitable for fitting guide shoes on the elevator unit and the car guide rails into one another.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: December 19, 2023
    Inventor: Robert Fridmann
  • Publication number: 20210316959
    Abstract: A method for installing an elevator system in an elevator shaft of a building in its construction phase uses a machine platform displaceable in the shaft along car guide rails and having a drive machine for moving a suspended elevator car to adapt a usable lifting height of the elevator car to an increasing height of the building by lifting the machine platform to a higher level. The method includes lowering a pre-assembled elevator unit into the shaft by a lifting device, using guide devices that are either mounted on the elevator unit and cooperate with stationarily fixed alignment elements in the shaft, or are fixed in the shaft and cooperate with alignment elements on the elevator unit, to align the unit in a position suitable for fitting guide shoes on the elevator unit and the car guide rails into one another.
    Type: Application
    Filed: October 22, 2019
    Publication date: October 14, 2021
    Inventor: Robert Fridmann