Patents Assigned to Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
  • Device for damping vibrations of a drilling tube
    Patent number: 4305264
    Abstract: A device for damping vibrations of a drilling tube by the slip between the ube and a fly-wheel which surrounds the tube and is frictionally connected to the tube by a slotted sleeve which is axially displaceable by adjusting means for adjusting the frictional connection. The adjusting means are connected to the sleeve by bearings so that they can be actuated while the tube and hence the sleeve and the fly-wheel are rotating during drilling.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: December 15, 1981
    Assignee: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
    Inventor: Franz Mim
  • Rock drilling tool
    Patent number: 4275796
    Abstract: A central pilot shaft having a cutting member at its end protrudes forward rom the axis of a circular bracket disc which has a plurality of cutting members arranged on its periphery. An exhaust channel permits removing fine particles from in front of the bracket disc.
    Type: Grant
    Filed: February 15, 1979
    Date of Patent: June 30, 1981
    Assignee: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
    Inventor: Werner Kleine
  • Drilling head of a rotary impact drill
    Patent number: 4243113
    Abstract: An exhaust channel in a rock drilling head of a rotary impact drill has an pening which extends over the front face of the drill shaft and over the adjoining peripheral surface of the drill shaft. Clogging of the exhaust channel is prevented by providing clearances between the forward and peripheral surfaces of the drilling head and the bored hole which are too small to permit the passage of rock particles large enough to block the exhaust channel.
    Type: Grant
    Filed: February 15, 1979
    Date of Patent: January 6, 1981
    Assignee: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
    Inventor: Werner Kleine
  • Apparatus for removing the drillings from the drilling site of a drill
    Patent number: 4036308
    Abstract: In the process and apparatus for removing the drillings from the drilling te of a drill described, removal is effected through a conduit, extending along the axis of a drill and possibly an adapter for a drilling machine, by a vacuum provided by a compressed-air stream traversing the removal conduit, said compressed air also serving to blow the drillings sucked into the conduit out of the conduit and away from the drilling site.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: July 19, 1977
    Assignee: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
    Inventor: Hugo Dellenberg