Patents by Inventor Alan de Ville

Alan de Ville 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).

  • Drive transmissions
    Patent number: 5087230
    Abstract: In a ships drive transmission, contra rotating propeller shafts are driven by powered means comprising concentric contra rotating drive elements, one of the shafts being connected thereto via epicyclic gearing. The propeller shafts are also coupled to each other through a part of the epicyclic gearing, to ensure equal loading.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: February 11, 1992
    Assignee: Northern Engineering Industries plc
    Inventors: David E. Yates, Geoffrey J. Lack, Alan De Ville
  • Drive transmissions
    Patent number: 5083989
    Abstract: A drive transmission which is particularly suitable for ship propulsion, comprises nested, contra rotating propeller shafts which in one example are driven by a single input shaft and which transmits contra rotating drives to the shafts via respective planet carriers. Particular advantages are the equal division of torque between the shafts and the enabling of location of thrust bearings and in positions which are easy of access.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: January 28, 1992
    Assignee: Northern Engineering Industries Plc
    Inventors: David E. Yates, Geoffrey J. Lack, Alan de Ville