Patents by Inventor Kalevi Maki-Kihnia

Kalevi Maki-Kihnia 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: 4842336
    Abstract: Method and device for collecting objects pointing out of the bottom level of seas or corresponding water areas so that the objects are carried from the bottom by using waterflow through an intake opening of the collecting device moving on the bottom of the sea. The objects are removed from the bottom by a removing device. The lowermost part of the removing device moves at the same level with the bottom of the water area or above it. The most suitable way of removing the objects from the bottom is by using water spray, the flow power of which is controlled separately from the flow power of the water in the conveying channel.
    Type: Grant
    Filed: December 8, 1987
    Date of Patent: June 27, 1989
    Assignee: Rauma-Repola Oy
    Inventors: Henrik Erametsa, Kari Kuvaja, Kalevi Maki-Kihnia, Jorma Terava