Patents by Inventor Bo Erik Forsberg

Bo Erik Forsberg 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).

  • Method and device for damping the recoil of a work tool connected to a rock drilling machine
    Patent number: 4068727
    Abstract: A recoil damping device for a percussive tool comprises a retard piston which is movable in a cushioning chamber. The feeding force and/or the pressure in the supply passage to the cushioning chamber is regulated so that the retard piston is axially free relative to the machine housing.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: January 17, 1978
    Assignee: Atlas Copco Aktiebolag
    Inventors: Kurt Holger Andersson, Carl Gosta Bernhard Ekwall, Bo Erik Forsberg
  • Method to minimize the amount of oil in the air exhausted from a pneumatically operated impact motor and an impact motor for carrying out this method
    Patent number: 3983788
    Abstract: An impact motor has a reciprocating piston that has its piston rod guided in bushings in the housing. The bushings are lubricated by oil-loaded compressed air but the piston is forced to reciprocate by oil-free compressed air.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: October 5, 1976
    Assignee: Atlas Copco Aktiebolag
    Inventors: Kurt Holger Andersson, Carl Gosta Bernhard Ekwall, Bo Erik Forsberg, Sven Ingemar Johansson