Patents by Inventor Pekka Koskelo

Pekka Koskelo 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).

  • Apparatus for storing drill rods
    Patent number: 5297642
    Abstract: An apparatus for storing drill rods, comprising two drill rod cartridges each comprising a rotating rotor provided with finger boards, guides for guiding the drill rods into gaps formed by the finger boards circumferentially around the axis of the rotor. The rotors are arranged to rotate in opposite directions in such a way that projections in the finger boards of one rotor are positioned in alignment with gaps in the other rotor, the drill rods being positioned therebetween and then passed alternately with the rotor of the two cartridges along spirals to a circumference about the rotors.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: March 29, 1994
    Assignee: Tamrock Oy
    Inventors: Pauli Rajakallio, Jouko Kaakkurivaara, Leo Hakkinen, Pekka Koskelo, Markku Launiemi