Patents by Inventor Esa Bergstrom

Esa Bergstrom 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: 6938554
    Abstract: The object of the invention is a releasing method and a releasing member for releasing a towed device from a cableway at a desired point without an assisting person or without stopping the lift. According to the method a towing member (2) connected to the towing rope (10) of the towing apparatus (5) of the cableway (4) is released from the clutch member (1) in the towed device by changing the vertical towing angle (R) between the towing member (2) and the clutch member (1) at the release point. In order to change the angle, a releasing member (3), developed for the method and mounted at the release point, is used, whereby the member has a vertical section (V) arranged intersectingly on the towing line at a height, which allows the towed device to pass below it. A safety system (9) can be connected to the releasing member, which system results in the stopping of the lift in the case that the load in the towing direction acting on the horizontal portion (V) exceeds the allowed value.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: September 6, 2005
    Inventors: Esa Aaltonen, Esa Bergström, Kari Juvonen
  • Publication number: 20040074415
    Abstract: The object of the invention is a releasing method and a releasing member for releasing a towed device from a cableway at a desired point without an assisting person or without stopping the lift. According to the method a towing member (2) connected to the towing rope (10) of the towing apparatus (5) of the cableway (4) is released from the clutch member (1) in the towed device by changing the vertical towing angle (R) between the towing member (2) and the clutch member (1) at the release point. In order to change the angle, a releasing member (3), developed for the method and mounted at the release point, is used, whereby the member has a vertical section (V) arranged intersectingly on the towing line at a height, which allows the towed device to pass below it. A safety system (9) can be connected to the releasing member, which system results in the stopping of the lift in the case that the load in the towing direction acting on the horizontal portion (V) exceeds the allowed value.
    Type: Application
    Filed: September 17, 2003
    Publication date: April 22, 2004
    Inventors: Esa Aaltonen, Esa Bergstrom, Kari Juvonen