Patents by Inventor Johan Fredrik Lindgren

Johan Fredrik Lindgren 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).

  • Pneumatic vane motor with improved sealing
    Patent number: 8215934
    Abstract: A pneumatic vane motor includes a stator with a cylinder, an inlet connectable to a pressure air source and an outlet connectable to an exhaust passage, a rotor journalled in the stator, and an output shaft. The stator has a front opening forming a clearance seal relative to the output shaft and an annular front cover with at least one elastic annular seal element encircling the output shaft at a distance from the clearance seal, wherein a low pressure chamber is formed between the clearance seal and the seal element or elements and communicates with the exhaust passage.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: July 10, 2012
    Assignee: Atlas Copco Tools AB
    Inventors: Sven Olov Roger Edlund, Heino Elmessaar, Johan Fredrik Lindgren, Hans Reinhold Svedman
  • PNEUMATIC VANE MOTOR
    Publication number: 20100092325
    Abstract: A pneumatic vane motor includes a stator with a cylinder, an inlet connectable to a pressure air source and an outlet connectable to an exhaust passage, a rotor journalled in the stator, and an output shaft. The stator has a front opening forming a clearance seal relative to the output shaft and an annular front cover with at least one elastic annular seal element encircling the output shaft at a distance from the clearance seal, wherein a low pressure chamber is formed between the clearance seal and the seal element or elements and communicates with the exhaust passage.
    Type: Application
    Filed: October 16, 2007
    Publication date: April 15, 2010
    Inventors: Sven Olov Roger Edlund, Heino Elmessaar, Johan Fredrik Lindgren, Hans Reinhold Svedman