Patents by Inventor Kalervo Pettersson

Kalervo Pettersson 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).

  • Platform body covering mechanism
    Patent number: 5354113
    Abstract: The invention relates to a platform body covering mechanism comprising a flexible cover and pulling devices operating in conjunction with each other, which pull the cover over the platform body and off it. The pulling devices comprise a pulling cable wire for pulling the cover over the platform body and a drum around which the cover is wound when it is removed from over tile platform body. At the edge of the cover is formed a reinforcement the end pieces of which move in the guides st the sides of the platform body. The guides are made curved so that they are closer to each other at the center part of the platform body. Thus, the reinforcement will bend upwards to form a curve at the center part of the platform body, so that the cover can be brought over the platform body even where the load placed on the platform body is higher than the sides of the platform body.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: October 11, 1994
    Inventor: Kalervo Pettersson