Patents by Inventor Lennart Donse

Lennart Donse 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 AND METHOD FOR ROCK AND - CONCRETE MACHINING
    Publication number: 20130327551
    Abstract: The invention concerns a hydraulic, valveless impact mechanism for use in equipment for the machining of at least one of rock and concrete comprising a machine housing (105; 205) with a cylinder bore, a piston (110; 210) mounted such that it moves within this bore arranged to carry out when in operation repetitive reciprocating motion relative to the machine housing and in this way to deliver impact directly or indirectly on a tool connectable to the equipment for machining at least one of rock and concrete, and where the piston includes a driving part (140; 240) that separates a first drive chamber (160; 260) and a second drive chamber (125; 225), with an effective volume that is greater than that of the first drive chamber.
    Type: Application
    Filed: April 3, 2012
    Publication date: December 12, 2013
    Inventor: Lennart Donsé
  • Accumulator membrane unit, method for production thereof and rock drilling machine including such an accumulator membrane unit
    Patent number: 8291937
    Abstract: An accumulator membrane unit (2) for inclusion into an accumulator chamber (6) in an accumulator (1) for storing hydraulic energy under pressure. The accumulator membrane unit includes membrane elements (3) that are sealingly joined at their peripheries and limit an inside membrane volume (V) which varies in dependence of a pressure at an outside of the accumulator membrane unit. The invention also concerns an accumulator, a method and a rock drilling machine.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: October 23, 2012
    Assignee: Atlas Copco Rock Drills AB
    Inventors: Gunnar Sjödin, Maria Pettersson, Peder Haraldsson, Magnus Walter, Lennart Donsé, Per-Erik Larsson
  • ACCUMULATOR MEMBRANE UNIT, METHOD FOR PRODUCTION THEREOF AND ROCK DRILLING MACHINE INCLUDING SUCH AN ACCUMULATOR MEMBRANE UNIT
    Publication number: 20110220419
    Abstract: An accumulator membrane unit (2) for inclusion into an accumulator chamber (6) in an accumulator (1) for storing hydraulic energy under pressure. The accumulator membrane unit includes membrane elements (3) that are sealingly joined at their peripheries and limit an inside membrane volume (V) which varies in dependence of a pressure at an outside of the accumulator membrane unit. The invention also concerns an accumulator, a method and a rock drilling machine.
    Type: Application
    Filed: December 4, 2009
    Publication date: September 15, 2011
    Inventors: Gunnar Sjödin, Maria Pettersson, Peder Haraldsson, Magnus Walter, Lennart Donsé, Per-Erik Larsson
  • Drill string component
    Patent number: 5209311
    Abstract: Drill string component for top hammer drilling comprising a rod (13) surrounded by a tube packet (4,5). The rod is provided with a thickened section (14) for cooperation with a diameter reduction (15) in the tube packet which at upwards drilling is situated below the section (14). Through this flushing liquid is prevented from flowing out of the drill string when the drill string is extended.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: May 11, 1993
    Assignee: Atlas Copco Construction and Mining Technique AB
    Inventor: Lennart Donse