Patents by Inventor Per A. Winnersjo

Per A. Winnersjo 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: 4351625
    Abstract: An apparatus for automatic bolting in rock reinforcement, the apparatus (11) having a drill (3) an injector, a bolting machine (5), a supply beam (6) a machine carriage (7) which is movable along the supply beam, a linear machine shifter switch (8) by means of which the drill and the bolting machine may be inserted on the machine carriage and which is shiftably disposed along and lockable on the supply beam for different bolt lengths, a working position adjustment device (9) which has sockets (10,11,12) for accommodating a drill bit (13), the forward end of the hose (14) of an injector, a bolt, and a positioning rod (15) which is fixedly mounted on the forward end of the supply beam and may be brought into abutment with the rock face for directing, by means of the appartus, in sequence, the drill bit, the hose and the bolt, at a point on the rock face for the purpose of accomplishing the rock reinforcement operation.
    Type: Grant
    Filed: February 13, 1980
    Date of Patent: September 28, 1982
    Assignee: Linden-Alimak AB
    Inventors: Berndt Selestam, Ake Forssell, Per A. Winnersjo