Patents by Inventor Blake A. Carl

Blake A. Carl 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: 8827853
    Abstract: A power split transmission includes a rotatable input shaft, a rotatable output shaft, and a planetary gear assembly connected between the input shaft and the output shaft. The transmission also includes a first hydraulic unit operable as a pump or a motor, the first hydraulic unit being coupled to the output shaft via the planetary gear assembly; a second hydraulic unit operable as a pump or a motor, the second hydraulic unit being coupled to the output shaft independently of the planetary gear assembly; and a braking mechanism coupled to the input shaft that is selectively engageable to retard rotation of the input shaft in at least one direction. The braking mechanism enables the power split transmission to use both the first hydraulic unit and the second hydraulic unit to provide enhanced torque at the output shaft without damaging a prime mover coupled to the input shaft.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: September 9, 2014
    Assignee: Parker-Hannifin Corporation
    Inventors: Blake A. Carl, Hao Zhang, Richard Kimpel
  • Patent number: 8517133
    Abstract: A powersplit transmission having a compact configuration that readily can be incorporated in a vehicle, particularly within the vehicle frame, includes (a) a mechanical transmission having a rotatable input shaft, a rotatable output shaft, and multiple gears for mechanically transmitting power between the input shaft and the output shaft; and (b) a hydraulic transmission containing a fluid for transmitting power between the input shaft and the output shaft. The mechanical transmission has a housing from which the input shaft and the output shaft extend. The hydraulic transmission includes first and second hydraulic units, each of which can function as a pump or a motor. The first hydraulic unit is coupled to the mechanical transmission system and the second hydraulic unit is coupled to the output shaft. The first and second hydraulic units are offset to the same side of the input shaft and the output shaft.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: August 27, 2013
    Assignee: Parker-Hannifin Corporation
    Inventors: Blake A. Carl, Stephen Horsfall, Joseph A. Kovach
  • Publication number: 20130121805
    Abstract: A power split transmission includes a rotatable input shaft, a rotatable output shaft, and a planetary gear assembly connected between the input shaft and the output shaft. The transmission also includes a first hydraulic unit operable as a pump or a motor, the first hydraulic unit being coupled to the output shaft via the planetary gear assembly; a second hydraulic unit operable as a pump or a motor, the second hydraulic unit being coupled to the output shaft independently of the planetary gear assembly; and a braking mechanism coupled to the input shaft that is selectively engageable to retard rotation of the input shaft in at least one direction. The braking mechanism enables the power split transmission to use both the first hydraulic unit and the second hydraulic unit to provide enhanced torque at the output shaft without damaging a prime mover coupled to the input shaft.
    Type: Application
    Filed: July 8, 2011
    Publication date: May 16, 2013
    Applicant: PARKER-HANNIFIN CORPORATION
    Inventors: Blake A. Carl, Hao Zhang, Richard Kimpel
  • Publication number: 20110031053
    Abstract: A powersplit transmission having a compact configuration that readily can be incorporated in a vehicle, particularly within the vehicle frame, includes (a) a mechanical transmission having a rotatable input shaft, a rotatable output shaft, and multiple gears for mechanically transmitting power between the input shaft and the output shaft; and (b) a hydraulic transmission containing a fluid for transmitting power between the input shaft and the output shaft. The mechanical transmission has a housing from which the input shaft and the output shaft extend. The hydraulic transmission includes first and second hydraulic units, each of which can function as a pump or a motor. The first hydraulic unit is coupled to the mechanical transmission system and the second hydraulic unit is coupled to the output shaft. The first and second hydraulic units are offset to the same side of the input shaft and the output shaft.
    Type: Application
    Filed: July 19, 2010
    Publication date: February 10, 2011
    Inventors: Blake A. Carl, Stephen Horsfall, Joseph A. Kovach