Patents Assigned to Fagersta Secoroc AB
  • Plain and thrust bearing device
    Patent number: 4109974
    Abstract: A device for reducing friction between surface planes sliding against each other in axial thrust bearings between the shaft end and roller in rotary roller bits and rollers for rock and earth boring, especially at full size tunnel driving. A friction reducing groove is arranged eccentrically in relation to the axes of the shaft end and the roller in at least one of the surface planes sliding against each other. Said groove is filled with material having a friction reducing and/or lubricating effect.
    Type: Grant
    Filed: January 25, 1977
    Date of Patent: August 29, 1978
    Assignee: Fagersta Secoroc AB
    Inventors: Alf H. Svanstrom, Karl-Erik Kangas
  • Lifting and handling tool for rotary roller bits
    Patent number: D248535
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: July 18, 1978
    Assignee: Fagersta Secoroc AB
    Inventors: Arne Sjostrom, Alf Svanstrom