Patents by Inventor Reijo Karppinen

Reijo Karppinen 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).

  • Shock absorber for hydraulic system
    Patent number: 10132438
    Abstract: Shock absorber used for damping a control flow which is to be directed to the control valve belonging to a hydraulic system or is to be directed to the adjustable valve of the flow through which absorber the flow of the hydraulic fluid can be directed at least in one direction. The absorber is a stopper which restricts the run of the flow to be damped which stopper is equipped with one or several ducts which let the flow go through the mentioned stopper when the other orifice of the mentioned duct is blocked with a plate in such a way that bending of the mentioned plate opens access for the flow through the mentioned stopper due to the pressure of the flow coming along the mentioned duct.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: November 20, 2018
    Assignee: DYNASET OY
    Inventor: Reijo Karppinen
  • SHOCK ABSORBER FOR HYDRAULIC SYSTEM
    Publication number: 20170016566
    Abstract: Shock absorber used for damping a control flow which is to be directed to the control valve belonging to a hydraulic system or is to be directed to the adjustable valve of the flow through which absorber the flow of the hydraulic fluid can be directed at least in one direction. The absorber is a stopper which restricts the run of the flow to be damped which stopper is equipped with one or several ducts which let the flow go through the mentioned stopper when the other orifice of the mentioned duct is blocked with a plate in such a way that bending of the mentioned plate opens access for the flow through the mentioned stopper due to the pressure of the flow coming along the mentioned duct.
    Type: Application
    Filed: March 5, 2015
    Publication date: January 19, 2017
    Applicant: DYNASET OY
    Inventor: Reijo KARPPINEN
  • Pressure medium driven device performing linear motion
    Patent number: 5683230
    Abstract: A pressure medium operated device generating to-and-fro motion to one or several pistons or a similar motion transmitting arm. The device includes a primary piston to which motion is brought in transmitting pressure medium alternately to both sides of the piston and control valves located inside the primary piston for controlling the pressure medium which moves the primary piston.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: November 4, 1997
    Inventor: Reijo Karppinen