Patents by Inventor Jack A Heiser

Jack A Heiser 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: 6503109
    Abstract: A swivel drive assembly for an electrically powered boat. The swivel drive assembly comprising a housing which has a propeller shaft extending therethrough and a propeller mechanically coupled to the propeller shaft. The swivel drive assembly further includes a turning post having a hollow interior mechanically coupled to the housing. A drive shaft is mechanically coupled to the propeller shaft and is disposed within the hollow interior of the turning post and the housing. The swivel drive assembly further includes an electric motor mechanically coupled to the drive shaft and operable to spin the propeller thereby. In this respect, the rotation of the turning post is operative to point the housing and the propeller in a desired direction to facilitate steering of the boat.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: January 7, 2003
    Inventors: Marshall D. Duffield, Jack A Heiser