Patents by Inventor Johan Vestman

Johan Vestman 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).

  • Hydraulic cylinder assembly, a cylinder for a piston rod-cylinder hydraulic assembly and use of a hydraulic cylinder assembly
    Patent number: 9534688
    Abstract: A hydraulic cylinder assembly includes a cylinder and a piston rod. The cylinder has an opening and upper and lower inner walls formed by a bore. An end of the piston rod is received in the bore through the opening and travels reciprocally through the opening in response to volume change of a hydraulic fluid in the cylinder. The cylinder has a first section adjacent the opening provided with a narrow passage of the piston rod close to the cylinder upper inner wall. The cylinder has further a second section spaced apart from the opening and provided with a clearance between the piston rod and the lower inner wall forming a chamber for the hydraulic fluid. The inner upper wall at the first section is provided with circumferential camberings.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: January 3, 2017
    Assignee: TOYOTA MATERIAL HANDLING MANUFACTURING SWEDEN AB
    Inventors: Joakim Bärnström, Johan Vestman
  • Hydraulic Cylinder Assembly, A Cylinder For A Piston Rod-Cylinder Hydraulic Assembly and Use Of A Hydraulic Cylinder Assembly
    Publication number: 20140326132
    Abstract: A hydraulic cylinder assembly includes a cylinder and a piston rod. The cylinder has an opening and upper and lower inner walls formed by a bore. An end of the piston rod is received in the bore through the opening and travels reciprocally through the opening in response to volume change of a hydraulic fluid in the cylinder. The cylinder has a first section adjacent the opening provided with a narrow passage of the piston rod close to the cylinder upper inner wall. The cylinder has further a second section spaced apart from the opening and provided with a clearance between the piston rod and the lower inner wall forming a chamber for the hydraulic fluid. The inner upper wall at the first section is provided with circumferential camberings.
    Type: Application
    Filed: May 1, 2014
    Publication date: November 6, 2014
    Applicant: BT Products AB
    Inventors: Joakim Bärnström, Johan Vestman