Patents by Inventor Juha Alajoki

Juha Alajoki 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 actuator
    Patent number: 8297241
    Abstract: A hydraulic actuator (1) comprising a body (2), in which a control arm (5) and a lift means (6) provided with a piston surface (22) are arranged, which lift means is arranged to follow the reference movement of the control arm (5), and an inlet port (3) and an outlet port (4) for hydraulic medium. The body (2) encloses a pressure chamber (10) delimited by the piston surface (22) of the lift means (6), and the movement of the control arm (5) provides a flow connection between the inlet port (3) and the pressure chamber (10) in order to move the lift means (6), and the movement of the control arm (5) in the opposite direction provides a flow connection between the pressure chamber (10) and the outlet port (4) in order to move the lift means (6) in the opposite direction.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: October 30, 2012
    Assignee: Wärtsilä Finland Oy
    Inventors: Juha Alajoki, Pekka Hautala, Jyrki Kajaste, Jukka Kiijärvi, Petri Kuosmanen, Markus Niemi
  • Injection arrangement for a piston engine
    Patent number: 7975673
    Abstract: A fuel injection arrangement for a piston engine, the arrangement comprising an injector nozzle (1) for injecting fuel into the combustion chamber (6) of the cylinder. A Theological actuator (15) is arranged in connection with the injector nozzle (1), the actuator comprising a space (18) containing Theological fluid and an apparatus (19, 20) by means of which the viscosity of the Theological fluid can be changed for controlling the fuel injection.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: July 12, 2011
    Assignee: Wärtsilä Finland Oy
    Inventors: Juha Alajoki, Jukka Kiijärvi, Markus Niemi, Jari Kostamo, Jyrki Kajaste, Pekka Hautala
  • HYDRAULIC ACTUATOR
    Publication number: 20100199933
    Abstract: A hydraulic actuator (1) comprising a body (2), in which a control arm (5) and a lift means (6) provided with a piston surface (22) are arranged, which lift means is arranged to follow the reference movement of the control arm (5), and an inlet port (3) and an outlet port (4) for hydraulic medium. The body (2) encloses a pressure chamber (10) delimited by the piston surface (22) of the lift means (6), and the movement of the control arm (5) provides a flow connection between the inlet port (3) and the pressure chamber (10) in order to move the lift means (6), and the movement of the control arm (5) in the opposite direction provides a flow connection between the pressure chamber (10) and the outlet port (4) in order to move the lift means (6) in the opposite direction.
    Type: Application
    Filed: July 2, 2008
    Publication date: August 12, 2010
    Applicant: WÄRSILÄ FINLAND OY
    Inventors: Juha Alajoki, Pekka Hautala, Jyrki Kajaste, Jukka Kiijärvi, Petri Kuosmanen, Markus Niemi
  • INJECTION ARRANGEMENT FOR A PISTON ENGINE
    Publication number: 20100050988
    Abstract: A fuel injection arrangement for a piston engine, the arrangement comprising an injector nozzle (1) for injecting fuel into the combustion chamber (6) of the cylinder A Theological actuator (15) is arranged in connection with the injector nozzle (1), the actuator comprising a space (18) containing Theological fluid and an apparatus (19, 20) by means of which the viscosity of the Theological fluid can be changed for controlling the fuel injection.
    Type: Application
    Filed: November 13, 2007
    Publication date: March 4, 2010
    Applicant: WÄRTSILÄ FINLAND OY
    Inventors: Juha Alajoki, Jukka Kiijärvi, Markus Niemi, Jari Kostamo, Jyrki Kajaste, Pekka Hautala