Patents by Inventor Jan Bjerngren

Jan Bjerngren 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).

  • Device for setting a rock bolt
    Patent number: 5114279
    Abstract: Device for setting a rock bolt. The device is provided with a bolt magazine (6) arranged on a feed beam (1). Rock bolts (8) are transferred from the bolt magazine to the setting position in line with a hole drilled in the rock by means of a swingable arm (9) and displacement of a bolt setting machine (5).
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: May 19, 1992
    Assignee: Atlas Copco Construction and Mining Technique AB
    Inventors: Jan Bjerngren, Sven Eriksson, Lars Persson