Patents by Inventor Petri Hannukainen

Petri Hannukainen 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: 9033077
    Abstract: A hybrid drive system for a utility vehicle (1) which operates with an internal combustion engine (12) and an electrical generator (80), motor (86) and storage means (84). Auxiliary hydraulic functions (93,94) may be powered by the electric motor (86). An output of the engine (12) is mechanically coupled to a multi-ratio transmission (10) which has a hydrostatic driveline (24) and an output which is mechanically coupled to propulsion means. With the engine switched off, the electric motor powers a hydraulic pump (91) which generates pressurized fluid to operate auxiliary functions. In addition, the pressurized fluid may be exploited in a secondary propulsion mode to drive a hydraulic motor (92) in the hydrostatic transmission to propel the vehicle in a low emission, low noise output mode.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: May 19, 2015
    Assignee: Valtra Oy Ab
    Inventors: Kimmo Kurkinen, Petri Hannukainen