Patents by Inventor Mircea Dumitru

Mircea Dumitru 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).

  • Publication number: 20250196950
    Abstract: An onboard track machine wear measurement system has an ultra-sonic probe that is attached to an undercarriage of the machine that is disposed adjacent to a track chain assembly, and a controller that is in communication with the ultra-sonic probe. The controller is configured to determine the thickness of a load bearing wall of a track component of the track chain assembly.
    Type: Application
    Filed: March 5, 2025
    Publication date: June 19, 2025
    Applicant: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Patent number: 12275467
    Abstract: An onboard track machine wear measurement system has an ultra-sonic probe that is attached to an undercarriage of the machine that is disposed adjacent a track chain assembly, and a controller that is in communication with the ultra-sonic probe. The controller is configured to determine the thickness of a load bearing wall of a track component of the track chain assembly.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: April 15, 2025
    Assignee: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Patent number: 12240542
    Abstract: A slider includes a first segment and a second segment. The first segment includes a first upper surface, a first lower surface, and a first interior surface that connects the first upper surface to the first lower surface. The first upper surface is configured to support a track. The first interior surface includes a first component of an attachment mechanism. The second segment includes a second upper surface, a second lower surface, and a second interior surface that connects the second upper surface to the second lower surface. The second upper surface is configured to support the track. The second interior surface includes a second component of the attachment mechanism that is configured to be removably attached to the first component.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: March 4, 2025
    Assignee: Caterpillar Inc.
    Inventors: Alex Daniel Baldwin, Mircea Dumitru
  • Patent number: 12187365
    Abstract: A track slider mounting plate kit includes a first shark fin configured mounting plate including a first bottom mounting surface, a first beveled surface extending from the first bottom mounting surface, and a second beveled surface that extends from the first beveled surface, forming a first oblique angle with the second beveled surface. A track slider is attached to the first shark fin configured mounting plate that has a top surface extending from the rear surface toward the front surface defining a top surface radius of curvature ranging from 2200 mm to 2600 mm.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: January 7, 2025
    Assignee: Caterpillar Global Mining LLC
    Inventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
  • Publication number: 20240301523
    Abstract: Disclosed herein is an example track pad having a ground-contacting portion for use in a track-based machine to propel and support the machine across a supporting surface. The track pad may be a track pad that forms a link of a chain forming the track for the track-based machine. The track pad includes a cast body formed of a first alloy steel having a first strength and toughness. The track pad includes a roll path that contacts a roller of the track-based machine. The roll path is hardened through an induction hardening process to achieve a hardness level at a depth of 32 millimeters or more from the surface of the roll path. The roll path is shaped and positioned to contact rollers of the track drive assembly and thereby reduce wear and fatigue on the track pad as a result of contact and force transferred through the roller.
    Type: Application
    Filed: March 10, 2023
    Publication date: September 12, 2024
    Applicant: Caterpillar Inc.
    Inventors: Scott Howard Magner, Mircea Dumitru, Brian Konrad Loeffler, Mohammed Maniruzzaman, Yongqiang Li, Simon Jiang
  • Patent number: 12077228
    Abstract: A transition track slider has a hollow body including a first side surface, a second side surface, a bottom surface at least partially interposed between the first side surface and the second side surface, and that also defines a cavity. A front surface with a bullet nose configuration connects the first side surface to the second side surface, and to the bottom surface, while a rear surface connects the first side surface to the second side surface, and to the bottom surface. A top surface extends from the rear surface toward the front surface.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: September 3, 2024
    Assignee: Caterpillar Global Mining LLC
    Inventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
  • Publication number: 20240270331
    Abstract: Disclosed herein is an example track pad having a ground-contacting portion for use in a track-based machine to propel and support the machine across a supporting surface. The track pad may be a track pad that forms a link of a chain forming the track for the track-based machine. The track pad includes a cast body formed of a first alloy steel having a first strength and toughness. The track pad includes a pocket to receive an insert. The insert is formed of a second material comprising a work-hardening alloy such as manganese-steel. The insert is friction welded in place on the track pad and shaped and positioned to contact rollers of the track drive assembly and thereby reduce wear and fatigue on the track pad as a result of contact and force transferred through the roller.
    Type: Application
    Filed: February 14, 2023
    Publication date: August 15, 2024
    Applicant: Caterpillar Inc.
    Inventors: Eric James Johannsen, Mircea Dumitru
  • Patent number: 12049265
    Abstract: A roller assembly for a ground-engaging track system includes a roller forming a shaft bore, and a roller shaft within the shaft bore and having a circumferential ramp surface. A roller retention system for the roller assembly includes a roller retention collar with an outer peripheral surface, and an inner peripheral surface that may include a wedge surface structured to friction fit the retention collar, within a collar bore in the roller, upon the circumferential ramp surface to limit axial displacement of the roller upon the roller shaft. The roller assembly may include two roller retention collars supporting the roller against axial displacement without use of thrust washers or the like, and fixing the roller and roller shaft to rotate together relative to a track roller frame.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: July 30, 2024
    Assignee: Caterpillar Inc.
    Inventors: Roger Lee Recker, Mircea Dumitru, Zachary T. Donlan
  • Patent number: 11987303
    Abstract: A track pad includes a shoe member that has two bottom voids extending upwardly from the ground engaging surface of the shoe member, and which form a central support pillar having a serpentine surface laterally on side of the central support pillar, and another serpentine surface laterally on the other side of the central support pillar. The two bottom voids form oval perimeters at the ground engaging surface.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: May 21, 2024
    Assignee: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Patent number: 11772724
    Abstract: A track chain member includes a shoe member, and a first rail member extending from the shoe member. The first rail member includes a first lug defining a first bore defining a first longitudinal axis and including a first bushing retention shelf disposed in the first bore, as well as a second lug including a second bushing retention shelf disposed in the second bore. A third lug extends in a direction opposite that of the first lug and second lug and is disposed axially between the first lug and the second lug.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: October 3, 2023
    Assignee: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Patent number: 11530007
    Abstract: A replacement kit includes a first coupler that includes a first inner axial end, a first outer axial end, and a first coupler attachment portion including a first forked oblong structure that defines a first minor axis with a first minor axis length, and a first major axis with a first major axis length that is greater than the first minor axis length, and including a first prong, a second prong disposed axially away from the first prong, and defining a first predetermined axial distance, and a first cam surface disposed between the first prong and the second prong.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: December 20, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zachary T. Donlan, Benjamin I. Jones, Mircea Dumitru
  • Publication number: 20220348274
    Abstract: A track slider mounting plate kit includes a first shark fin configured mounting plate including a first bottom mounting surface, a first beveled surface extending from the first bottom mounting surface, and a second beveled surface that extends from the first beveled surface, forming a first oblique angle with the second beveled surface. A track slider is attached to the first shark fin configured mounting plate that has a top surface extending from the rear surface toward the front surface defining a top surface radius of curvature ranging from 2200 mm to 2600 mm.
    Type: Application
    Filed: April 29, 2021
    Publication date: November 3, 2022
    Applicant: Caterpillar Global Mining Equipment LLC
    Inventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
  • Publication number: 20220348273
    Abstract: A transition track slider has a hollow body including a first side surface, a second side surface, a bottom surface at least partially interposed between the first side surface and the second side surface, and that also defines a cavity. A front surface with a bullet nose configuration connects the first side surface to the second side surface, and to the bottom surface, while a rear surface connects the first side surface to the second side surface, and to the bottom surface. A top surface extends from the rear surface toward the front surface.
    Type: Application
    Filed: April 29, 2021
    Publication date: November 3, 2022
    Applicant: Caterpillar Global Mining Equipment LLC
    Inventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
  • Publication number: 20220289321
    Abstract: A track pad includes a shoe member that has two bottom voids extending upwardly from the ground engaging surface of the shoe member, and which form a central support pillar having a serpentine surface laterally on side of the central support pillar, and another serpentine surface laterally on the other side of the central support pillar. The two bottom voids form oval perimeters at the ground engaging surface.
    Type: Application
    Filed: March 15, 2021
    Publication date: September 15, 2022
    Applicant: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Publication number: 20220242502
    Abstract: A slider includes a first segment and a second segment. The first segment includes a first upper surface, a first lower surface, and a first interior surface that connects the first upper surface to the first lower surface. The first upper surface is configured to support a track. The first interior surface includes a first component of an attachment mechanism. The second segment includes a second upper surface, a second lower surface, and a second interior surface that connects the second upper surface to the second lower surface. The second upper surface is configured to support the track. The second interior surface includes a second component of the attachment mechanism that is configured to be removably attached to the first component.
    Type: Application
    Filed: January 29, 2021
    Publication date: August 4, 2022
    Applicant: Caterpillar Inc.
    Inventors: Alex Daniel BALDWIN, Mircea DUMITRU
  • Publication number: 20220234660
    Abstract: An onboard track machine wear measurement system has an ultra-sonic probe that is attached to an undercarriage of the machine that is disposed adjacent a track chain assembly, and a controller that is in communication with the ultra-sonic probe. The controller is configured to determine the thickness of a load bearing wall of a track component of the track chain assembly.
    Type: Application
    Filed: January 25, 2021
    Publication date: July 28, 2022
    Applicant: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Publication number: 20220194496
    Abstract: A roller assembly for a ground-engaging track system includes a roller forming a shaft bore, and a roller shaft within the shaft bore and having a circumferential ramp surface. A roller retention system for the roller assembly includes a roller retention collar with an outer peripheral surface, and an inner peripheral surface that may include a wedge surface structured to friction fit the retention collar, within a collar bore in the roller, upon the circumferential ramp surface to limit axial displacement of the roller upon the roller shaft. The roller assembly may include two roller retention collars supporting the roller against axial displacement without use of thrust washers or the like, and fixing the roller and roller shaft to rotate together relative to a track roller frame.
    Type: Application
    Filed: December 21, 2020
    Publication date: June 23, 2022
    Applicant: Caterpillar Inc.
    Inventors: Roger Lee Recker, Mircea Dumitru, Zachary T. Donlan
  • Patent number: 11312434
    Abstract: A replacement kit for a rotating member attachment assembly includes a first thrust washer defining a first thrust washer diameter and a first thrust washer axial thickness, and a first end cap defining a first end cap axial thickness and including a first end cap circumferential surface defining a first end cap diameter that is greater than the first thrust washer diameter. The first end cap circumferential surface includes external threads.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: April 26, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zachary T. Donlan, Mircea Dumitru
  • Patent number: 10960944
    Abstract: A track chain member includes a first rib coupling the shoe member to the first lug; and a second rib coupling the shoe member to the second lug, defining a first side recess between the first rib and the second rib. The first side recess also extends from the exterior of the shoe member and underneath the first top surface, the first lateral end defines a first lateral end width along the track chain traveling direction, and the first side recess also spans the majority of the first lateral end width along the track chain traveling direction.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: March 30, 2021
    Assignee: Caterpillar Inc.
    Inventors: Benjamin Isaac Jones, Mircea Dumitru
  • Patent number: D941886
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: January 25, 2022
    Assignee: Caterpillar Inc.
    Inventor: Mircea Dumitru