Patents by Inventor Hans Bernwall

Hans Bernwall 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: 4274606
    Abstract: An improved winch is disclosed which possesses means for increasing the coefficient of friction on the surface of the spool only in an area substantially at the intersection of the drum and flange sections of the winch so that only the last turn of rope or line around the winch would contact the area of increased friction. Friction in this area can be increased by placing a rubber ring over a conventional winch which makes it self-tailing. As a further embodiment, the winch possesses a surface which is recessed, said recess containing radial projection elements for the support of friction increasing sections contained between said radial projection elements within the recess.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: June 23, 1981
    Inventors: Hans Bernwall, Lars Lundberg, Carl Seipel