Patents by Inventor Esa RUOSTEMAA

Esa RUOSTEMAA 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).

  • Method for disassembling and/or assembling an underwater section of a retractable thruster unit
    Patent number: 9708032
    Abstract: A method for disassembling and/or assembling an underwater section of a retractable thruster unit of a swimming vessel. A supporting cradle is detachably fixed to the underwater section from below, and the thruster unit is lifted so that the underwater section is at least partly brought inside the well formed in the bottom of the vessel. Lifting wires of an auxiliary lift are connected to the supporting cradle for supporting the thruster unit. Water is drained from the well, and the lower gear is disengaged and the intermediate section and the lower gear are sealed. After that water is let to ingress into the well and the underwater section is lowered down by the auxiliary lift to dock bottom or sea bed, from where the underwater section is picked up with a crane.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: July 18, 2017
    Assignee: ROLLS-ROYCE OY AB
    Inventors: Esa Ruostemaa, Mikko Karppinen, Mikko Knuuti
  • METHOD FOR DISASSEMBLING AND/OR ASSEMBLING AN UNDERWATER SECTION OF A RETRACTABLE THRUSTER UNIT
    Publication number: 20150329181
    Abstract: A method for disassembling and/or assembling an underwater section of a retractable thruster unit of a swimming vessel. A supporting cradle is detachably fixed to the underwater section from below, and the thruster unit is lifted so that the underwater section is at least partly brought inside the well formed in the bottom of the vessel. Lifting wires of an auxiliary lift are connected to the supporting cradle for supporting the thruster unit. Water is drained from the well, and the lower gear is disengaged and the intermediate section and the lower gear are sealed. After that water is let to ingress into the well and the underwater section is lowered down by the auxiliary lift to dock bottom or sea bed, from where the underwater section is picked up with a crane.
    Type: Application
    Filed: December 14, 2012
    Publication date: November 19, 2015
    Inventors: Esa RUOSTEMAA, Mikko KARPPINEN, Mikko KNUUTI