Patents by Inventor Antero Ala-Jokimaki

Antero Ala-Jokimaki 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).

  • Percussive drill rod system
    Patent number: 4625814
    Abstract: Method and apparatus for Percussive drilling, in which a drill rod is selected with dimensions such that cross-sectional areas of an inner channel within the rod for flushing medium, and of an outer channel formed between the rod and material being drilled, are substantially equal, so that flow resistance of the drill particles and consumption of flushing powder are reduced.
    Type: Grant
    Filed: July 19, 1984
    Date of Patent: December 2, 1986
    Assignee: Oy Airam Ab Kometa
    Inventors: Kalevi Helasuo, Antero Ala-Jokimaki