Patents by Inventor Erik Ahlström

Erik Ahlström 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, system and computer program for controlling propulsion of a drilling rig as well as a drilling rig
    Patent number: 10232876
    Abstract: A method for controlling propulsion of a drilling rig. The drilling rig includes a right propulsion unit and a left propulsion unit and mutually independent speed control and a transmission for driving the right propulsion unit and the left propulsion unit. The transmission provides at least two gear states of a gear box. A propulsion speed is request for the right propulsion unit and for the left propulsion unit. A difference is determined between a requested propulsion speed of the right propulsion unit and the left propulsion unit. A suitable gear state is determined based on the determined difference. Also a computer program product including program code for a computer for implementing the method. A system and a drilling rig equipped with the system.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: March 19, 2019
    Assignee: EPIROC ROCK DRILLS AKTIEBOLAG
    Inventors: Erik Aldén, Fredrik Öhman, Erik Ahlström
  • METHOD, SYSTEM AND COMPUTER PROGRAM FOR CONTROLLING PROPULSION OF A DRILLING RIG AS WELL AS A DRILLING RIG
    Publication number: 20160339956
    Abstract: A method for controlling propulsion of a drilling rig. The drilling rig includes a right propulsion unit and a left propulsion unit and mutually independent speed control and a transmission for driving the right propulsion unit and the left propulsion unit. The transmission provides at least two gear states of a gear box. A propulsion speed is request for the right propulsion unit and for the left propulsion unit. A difference is determined between a requested propulsion speed of the right propulsion unit and the left propulsion unit. A suitable gear state is determined based on the determined difference. Also a computer program product including program code for a computer for implementing the method. A system and a drilling rig equipped with the system.
    Type: Application
    Filed: January 29, 2015
    Publication date: November 24, 2016
    Inventors: Erik Aldén, Fredrik Öhman, Erik Ahlström
  • Method and system for controlling a compressor at a rock drilling apparatus and a rock drilling apparatus
    Patent number: 9347285
    Abstract: The present invention relates to a control of a compressor (8) at a rock drilling apparatus, said rock drilling apparatus including a power source for driving a compressor (8) at a rock drilling process, said compressor (8) being arranged to operate according to a first mode and according to a second mode, wherein, in said first mode, the work produced by the compressor (8) is arranged to be controlled by controlling the rotation speed of said compressor (8), and wherein, in said second mode, the work produced by the compressor (8) is arranged to be controlled by controlling the air flow at the compressor inlet.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: May 24, 2016
    Assignee: Atlas Copco Rock Drills AB
    Inventors: Erik Ahlström, Erik Aldèn
  • METHOD AND SYSTEM FOR CONTROLLING A COMPRESSOR AT A ROCK DRILLING APPARATUS AND A ROCK DRILLING APPARATUS
    Publication number: 20130140089
    Abstract: The present invention relates to a control of a compressor (8) at a rock drilling apparatus, said rock drilling apparatus including a power source for driving a compressor (8) at a rock drilling process, said compressor (8) being arranged to operate according to a first mode and according to a second mode, wherein, in said first mode, the work produced by the compressor (8) is arranged to be controlled by controlling the rotation speed of said compressor (8), and wherein, in said second mode, the work produced by the compressor (8) is arranged to be controlled by controlling the air flow at the compressor inlet.
    Type: Application
    Filed: August 25, 2011
    Publication date: June 6, 2013
    Inventors: Erik Ahlström, Erik Aldèn