Patents by Inventor Levi J. Karlfors

Levi J. Karlfors 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).

  • Fluid jet method and device for breaking hard material
    Patent number: 4129335
    Abstract: A hard compact material, such as rock, is broken by directing a high velocity jet of fluid, such as water, into a drill hole in the material to be broken. The jet is generated by a nozzle and is directed into the drill hole through a tubular member, which is associated with the nozzle. Upon having traversed the tubular member, the jet is suddenly arrested in the hole to break the material by the established jet stagnation pressure stemmed by the tubular member.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: December 12, 1978
    Assignee: Atlas Copco Aktiebolag
    Inventors: Erik V. Lavon, Bo Lemcke, Levi J. Karlfors