Patents by Inventor Jeremiah C. Johnson

Jeremiah C. Johnson 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: 11920677
    Abstract: A system including a gearbox and a hydraulic machine connected by a working fluid circuit. The gearbox including a gearbox housing having first and second gearbox fluid passages integrated into the gearbox housing. The hydraulic machine including a case having first and second hydraulic machine fluid passages, the first and second hydraulic machine fluid passages being integrated into the case. A set of rotating elements enclosed within the case. The first gearbox fluid passage and the first hydraulic machine fluid passage align to form a feed passage to conduct fluid at a first pressure from a first source to the set of rotating elements. The second gearbox fluid passage and the second hydraulic machine fluid passage align to form a charge passage to conduct fluid at a second pressure from a second source to the set of rotating elements. The first pressure being less than the second pressure.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: March 5, 2024
    Assignee: Caterpillar Inc.
    Inventors: Christopher W. Pruess, Aaron B. Crabtree, Jeremiah C Johnson
  • Publication number: 20230243419
    Abstract: A system including a gearbox and a hydraulic machine connected by a working fluid circuit. The gearbox including a gearbox housing having first and second gearbox fluid passages integrated into the gearbox housing. The hydraulic machine including a case having first and second hydraulic machine fluid passages, the first and second hydraulic machine fluid passages being integrated into the case. A set of rotating elements enclosed within the case. The first gearbox fluid passage and the first hydraulic machine fluid passage align to form a feed passage to conduct fluid at a first pressure from a first source to the set of rotating elements. The second gearbox fluid passage and the second hydraulic machine fluid passage align to form a charge passage to conduct fluid at a second pressure from a second source to the set of rotating elements. The first pressure being less than the second pressure.
    Type: Application
    Filed: February 1, 2022
    Publication date: August 3, 2023
    Applicant: Caterpillar Inc.
    Inventors: Christopher W. PRUESS, Aaron B. CRABTREE, Jeremiah C. JOHNSON
  • Patent number: 9416779
    Abstract: Method of controlling multiple variable displacement hydraulic pumps determined relative to operator commands. If non-second-pump-dominated command, a respective adjusted displacement request is determined based upon the lesser of the operator requested torque limited displacement and an adjusted torque limited displacement that calculated based upon and the torque limited displacement of the respective pump and a scaling factor calculated based upon the first relief valve set pressure and respective pump pressure. If second-pump-dominated command, the set pressure of a relief valve associated with one of the pumps is instead utilized in calculating the scaling factor in the above strategy.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: August 16, 2016
    Assignee: Caterpillar Inc.
    Inventors: Corey L. Gorman, Adam Nackers, Jeremiah C. Johnson, John J. Krone
  • Patent number: 9151280
    Abstract: The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: October 6, 2015
    Assignee: Caterpillar Inc.
    Inventors: Wayne Fritz, Jeremiah C. Johnson
  • Publication number: 20150267697
    Abstract: Method of controlling multiple variable displacement hydraulic pumps determined relative to operator commands. If non-second-pump-dominated command, a respective adjusted displacement request is determined based upon the lesser of the operator requested torque limited displacement and an adjusted torque limited displacement that calculated based upon and the torque limited displacement of the respective pump and a scaling factor calculated based upon the first relief valve set pressure and respective pump pressure. If second-pump-dominated command, the set pressure of a relief valve associated with one of the pumps is instead utilized in calculating the scaling factor in the above strategy.
    Type: Application
    Filed: March 24, 2014
    Publication date: September 24, 2015
    Applicant: Caterpillar Inc.
    Inventors: Corey L. Gorman, Adam Nackers, Jeremiah C. Johnson, John J. Krone
  • Publication number: 20140109761
    Abstract: A port plate is disclosed for use with an axial pump. The port plate may have a cylindrical plate member with a head-end face and a piston-end face located opposite the head-end face, at least one inlet port formed within a first half of the plate member and extending from the head-end face through the piston-end face, and at least one outlet port formed within a second half of the plate member and extending from the head-end face through the piston-end face. The port plate may also have at least one timing hole formed within the plate member at a leading end of the at least one outlet port and passing from the head-end face through the piston-end face, and an arcuate spherical groove extending from the at least one timing hole to the at least one outlet port.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Jeremiah C. JOHNSON, Wayne E. FRITZ
  • Patent number: 8668469
    Abstract: The present disclosure sets forth an axial piston pump with greatly improved throughput. The axial piston pump provides cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of the piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modern machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: March 11, 2014
    Assignee: Caterpillar Inc.
    Inventors: Wayne Fritz, Jeremiah C. Johnson
  • Publication number: 20140056730
    Abstract: The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.
    Type: Application
    Filed: November 5, 2013
    Publication date: February 27, 2014
    Applicant: Caterpillar Inc.
    Inventors: Wayne Fritz, Jeremiah C. Johnson
  • Publication number: 20120275928
    Abstract: The present disclosure sets forth an axial piston pump with greatly improved throughput. The axial piston pump provides cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of the piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modern machines.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 1, 2012
    Applicant: CATERPILLAR, INC.
    Inventors: Wayne Fritz, Jeremiah C. Johnson