Patents by Inventor Jan-Erik Rova

Jan-Erik Rova 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).

  • Patent number: 7293634
    Abstract: A hydraulic shock absorber comprises a cylindrical chamber (3), which is closed at one end and in which is axially slidably guided a piston member 85), supported by a piston rod (8) and at its peripheral surface carrying a surrounding non-slotted elastic ring element (6), the peripheral piston member surface being conically converging in a direction away from the closed chamber end and the inner surface of the ring element also conically converging in the same direction, the ring element (6) furthermore being axially reciprocably mounted on the piston member (5) between a first rigid abutment 84) at the end of said member (5) closest to the closed and (10) of the chamber (3), and a second rigid abutment (7) on the piston member (5) at a spacing from the first abutment (4) exceeding the axial length of the ring element (6).
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 13, 2007
    Assignee: ASA-Suspension AB
    Inventor: Jan-Erik Rova
  • Publication number: 20060151271
    Abstract: A hydraulic shock absorber comprises a cylindrical chamber (3), which is closed at one end and in which is axially slidably guided a piston member 85), supported by a piston rod (8) and at its peripheral surface carrying a surrounding non-slotted elastic ring element (6), the peripheral piston member surface being conically converging in a direction away from the closed chamber end and the inner surface of the ring element also conically converging in the same direction, the ring element (6) furthermore being axially reciprocably mounted on the piston member (5) between a first rigid abutment 84) at the end of said member (5) closest to the closed and (10) of the chamber (3), and a second rigid abutment (7) on the piston member (5) at a spacing from the first abutment (4) exceeding the axial length of the ring element (6).
    Type: Application
    Filed: July 12, 2002
    Publication date: July 13, 2006
    Inventor: Jan-Erik Rova
  • Patent number: 4518306
    Abstract: Improvement in a bucket-equipped loading machine, particularly a so-called wheel loader, having at one end of the machine a loading bucket which is supported for raising and lowering movements by a pair of lift arms, journalled in the machine, and which is pivotally connected with the free ends of said arms and lockable in position relative thereto.
    Type: Grant
    Filed: July 22, 1983
    Date of Patent: May 21, 1985
    Inventor: Jan-Erik Rova
  • Patent number: 4500076
    Abstract: A spring suspension system allowing movements between the drive compartment and a frame portion of a heavy duty vehicle with a plurality of degrees of freedom and with a frequency range of from as low as about 1 Hz and up to 5000 Hz and more, comprises at least one axially operative spring member formed with a rigid cylindrical outer surface and mounted between the compartment and frame portion of the vehicle. The spring member is connected to one of these vehicle components by a supplemental elastomeric spring which surrounds the cylindrical outer surface of the spring and the spring member is connected to the other of the vehicle components by an articulation.
    Type: Grant
    Filed: July 10, 1984
    Date of Patent: February 19, 1985
    Inventor: Jan-Erik Rova