Patents by Inventor Bogdan Kozul

Bogdan Kozul 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 hybrid swing drive system for excavators
    Patent number: 11421713
    Abstract: A swing drive system for an excavator is provided which utilizes a prime mover mechanically connected to a first hydraulic pump/motor and a second hydraulic pump/motor mechanically connected to a swing mechanism. The system includes a hydraulic circuit connecting a hydraulic fluid reservoir, a hydraulic accumulator, the first hydraulic pump/motor, and the second hydraulic pump/motor. The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers, including the swing drive.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: August 23, 2022
    Assignee: Parker-Hannifin Corporation
    Inventors: Jeff Cullman, Hao Zhang, Richard D. Kimpel, Zhesheng Jiang, Raymond Collett, Bogdan Kozul
  • HYDRAULIC HYBRID SWING DRIVE SYSTEM FOR EXCAVATORS
    Publication number: 20180209449
    Abstract: A swing drive system for an excavator is provided which utilizes a prime mover mechanically connected to a first hydraulic pump/motor and a second hydraulic pump/motor mechanically connected to a swing mechanism. The system includes a hydraulic circuit connecting a hydraulic fluid reservoir, a hydraulic accumulator, the first hydraulic pump/motor, and the second hydraulic pump/motor. The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers, including the swing drive.
    Type: Application
    Filed: March 20, 2018
    Publication date: July 26, 2018
    Inventors: Jeff Cullman, Hao Zhang, Richard D. Kimpel, Zhesheng Jiang, Raymond Collett, Bogdan Kozul
  • Hydraulic hybrid swing drive system for excavators
    Patent number: 9926946
    Abstract: A swing drive system (11) for an excavator is provided which utilizes a prime mover (20) mechanically connected to a first hydraulic pump/motor (30) and a second hydraulic pump/motor (32) mechanically connected to a swing mechanism (70). The system includes a hydraulic circuit (31) connecting a hydraulic fluid reservoir (42), a hydraulic accumulator (40), the first hydraulic pump/motor (30), and the second hydraulic pump/motor (32). The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers (62,64,66), including the swing mechanism.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: March 27, 2018
    Assignee: Parker-Hannifin Corporation
    Inventors: Jeff Cullman, Hao Zhang, Richard D. Kimpel, Zhesheng Jiang, Raymond Collett, Bogdan Kozul
  • HYDRAULIC HYBRID SWING DRIVE SYSTEM FOR EXCAVATORS
    Publication number: 20140373522
    Abstract: A swing drive system (11) for an excavator is provided which utilizes a prime mover (20) mechanically connected to a first hydraulic pump/motor (30) and a second hydraulic pump/motor (32) mechanically connected to a swing mechanism (70). The system includes a hydraulic circuit (31) connecting a hydraulic fluid reservoir (42), a hydraulic accumulator (40), the first hydraulic pump/motor (30), and the second hydraulic pump/motor (32). The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers (62,64,66), including the swing mechanism.
    Type: Application
    Filed: January 4, 2013
    Publication date: December 25, 2014
    Inventors: Jeff Cullman, Hao Zhang, Richard D. Kimpel, Zhesheng Jiang, Raymond Collett, Bogdan Kozul