Patents by Inventor Thomas Bergqvist

Thomas Bergqvist 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).

  • Piston cylinder device with protection arrangement and method of protecting a piston cylinder device against overload or failure of the piston cylinder device
    Patent number: 11761504
    Abstract: A piston cylinder device (1) comprising a cylinder (2) with a first and a second end and a guide (6), such that a pressure chamber (8) is formed in the cylinder. A piston (12) is moveable in the pressure chamber (8). The guide (6) is fixedly secured to the cylinder (2) by a lock ring (7). A sealing means (9) is arranged to seal between the guide (6) and an inner wall of a tubular wall (3) of the cylinder (2) to prevent fluid leakage from the pressure chamber (8) to the surroundings. The piston cylinder device (1) is provided with a material weakening zone (13) arranged in the inner wall of the tubular wall (3) of the cylinder (2) axially between the lock ring (7) and the second end (20) of the cylinder (2), the material weakening zone (13) being arranged to be deformed or sheared against the lock ring (7) at a predetermined level of impact of the piston (12) against the guide (6).
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: September 19, 2023
    Assignee: STROMSHOLMEN AB
    Inventors: Fredrik Göransson, Thomas Bergqvist
  • PISTON CYLINDER DEVICE WITH PROTECTION ARRANGEMENT AND METHOD OF PROTECTING A PISTON CYLINDER DEVICE AGAINST OVERLOAD OR FAILURE OF THE PISTON CYLINDER DEVICE
    Publication number: 20220106997
    Abstract: A piston cylinder device (1) comprising a cylinder (2) with a first and a second end and a guide (6), such that a pressure chamber (8) is formed in the cylinder. A piston (12) is moveable in the pressure chamber (8). The guide (6) is fixedly secured to the cylinder (2) by a lock ring (7). A sealing means (9) is arranged to seal between the guide (6) and an inner wall of a tubular wall (3) of the cylinder (2) to prevent fluid leakage from the pressure chamber (8) to the surroundings. The piston cylinder device (1) is provided with a material weakening zone (13) arranged in the inner wall of the tubular wall (3) of the cylinder (2) axially between the lock ring (7) and the second end (20) of the cylinder (2), the material weakening zone (13) being arranged to be deformed or sheared against the lock ring (7) at a predetermined level of impact of the piston (12) against the guide (6).
    Type: Application
    Filed: December 15, 2021
    Publication date: April 7, 2022
    Inventors: Fredrik Göransson, Thomas Bergqvist
  • Piston cylinder device with protection arrangement and method of protecting a piston cylinder device against overload or failure of the piston cylinder device
    Patent number: 11226022
    Abstract: A piston cylinder device (1) comprising a cylinder (2) with a first and a second end and a guide (6), such that a pressure chamber (8) is formed in the cylinder. A piston (12) is moveable in the pressure chamber (8). The guide (6) is fixedly secured to the cylinder (2) by a lock ring (7). A sealing means (9) is arranged to seal between the guide (6) and an inner wall of a tubular wall (3) of the cylinder (2) to prevent fluid leakage from the pressure chamber (8) to the surroundings. The piston cylinder device (1) is provided with a material weakening zone (13) arranged in the inner wall of the tubular wall (3) of the cylinder (2) axially between the lock ring (7) and the second end (20) of the cylinder (2), the material weakening zone (13) being arranged to be deformed or sheared against the lock ring (7) at a predetermined level of impact of the piston (12) against the guide (6).
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 18, 2022
    Assignee: Stromsholmen AB
    Inventors: Fredrik Göransson, Thomas Bergqvist
  • Piston Cylinder Device With Protection Arrangement and Method of Protecting a Piston Cylinder Device Against overload or Failure of the Piston Cylinder Device
    Publication number: 20190331188
    Abstract: A piston cylinder device (1) comprising a cylinder (2) with a first and a second end and a guide (6), such that a pressure chamber (8) is formed in the cylinder. A piston (12) is moveable in the pressure chamber (8). The guide (6) is fixedly secured to the cylinder (2) by a lock ring (7). A sealing means (9) is arranged to seal between the guide (6) and an inner wall of a tubular wall (3) of the cylinder (2) to prevent fluid leakage from the pressure chamber (8) to the surroundings. The piston cylinder device (1) is provided with a material weakening zone (13) arranged in the inner wall of the tubular wall (3) of the cylinder (2) axially between the lock ring (7) and the second end (20) of the cylinder (2), the material weakening zone (13) being arranged to be deformed or sheared against the lock ring (7) at a predetermined level of impact of the piston (12) against the guide (6).
    Type: Application
    Filed: June 19, 2017
    Publication date: October 31, 2019
    Inventors: Fredrik Göransson, Thomas Bergqvist