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).
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Publication number: 20250196950Abstract: 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: ApplicationFiled: March 5, 2025Publication date: June 19, 2025Applicant: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Patent number: 12275467Abstract: 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: GrantFiled: January 25, 2021Date of Patent: April 15, 2025Assignee: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Patent number: 12240542Abstract: 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: GrantFiled: January 29, 2021Date of Patent: March 4, 2025Assignee: Caterpillar Inc.Inventors: Alex Daniel Baldwin, Mircea Dumitru
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Patent number: 12187365Abstract: 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: GrantFiled: April 29, 2021Date of Patent: January 7, 2025Assignee: Caterpillar Global Mining LLCInventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
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Publication number: 20240301523Abstract: 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: ApplicationFiled: March 10, 2023Publication date: September 12, 2024Applicant: Caterpillar Inc.Inventors: Scott Howard Magner, Mircea Dumitru, Brian Konrad Loeffler, Mohammed Maniruzzaman, Yongqiang Li, Simon Jiang
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Patent number: 12077228Abstract: 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: GrantFiled: April 29, 2021Date of Patent: September 3, 2024Assignee: Caterpillar Global Mining LLCInventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
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Publication number: 20240270331Abstract: 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: ApplicationFiled: February 14, 2023Publication date: August 15, 2024Applicant: Caterpillar Inc.Inventors: Eric James Johannsen, Mircea Dumitru
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Patent number: 12049265Abstract: 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: GrantFiled: December 21, 2020Date of Patent: July 30, 2024Assignee: Caterpillar Inc.Inventors: Roger Lee Recker, Mircea Dumitru, Zachary T. Donlan
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Patent number: 11987303Abstract: 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: GrantFiled: March 15, 2021Date of Patent: May 21, 2024Assignee: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Patent number: 11772724Abstract: 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: GrantFiled: November 17, 2020Date of Patent: October 3, 2023Assignee: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Patent number: 11530007Abstract: 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: GrantFiled: August 13, 2019Date of Patent: December 20, 2022Assignee: Caterpillar Inc.Inventors: Zachary T. Donlan, Benjamin I. Jones, Mircea Dumitru
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Publication number: 20220348274Abstract: 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: ApplicationFiled: April 29, 2021Publication date: November 3, 2022Applicant: Caterpillar Global Mining Equipment LLCInventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
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Publication number: 20220348273Abstract: 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: ApplicationFiled: April 29, 2021Publication date: November 3, 2022Applicant: Caterpillar Global Mining Equipment LLCInventors: Cristian Zaharia, Elizabeth J. Barnes, Michael W. Haws, Mircea Dumitru, Aruna Kinjarapu
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Publication number: 20220289321Abstract: 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: ApplicationFiled: March 15, 2021Publication date: September 15, 2022Applicant: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Publication number: 20220242502Abstract: 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: ApplicationFiled: January 29, 2021Publication date: August 4, 2022Applicant: Caterpillar Inc.Inventors: Alex Daniel BALDWIN, Mircea DUMITRU
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Publication number: 20220234660Abstract: 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: ApplicationFiled: January 25, 2021Publication date: July 28, 2022Applicant: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Publication number: 20220194496Abstract: 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: ApplicationFiled: December 21, 2020Publication date: June 23, 2022Applicant: Caterpillar Inc.Inventors: Roger Lee Recker, Mircea Dumitru, Zachary T. Donlan
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Patent number: 11312434Abstract: 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: GrantFiled: August 13, 2019Date of Patent: April 26, 2022Assignee: Caterpillar Inc.Inventors: Zachary T. Donlan, Mircea Dumitru
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Patent number: 10960944Abstract: 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: GrantFiled: March 14, 2018Date of Patent: March 30, 2021Assignee: Caterpillar Inc.Inventors: Benjamin Isaac Jones, Mircea Dumitru
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Patent number: D941886Type: GrantFiled: November 21, 2019Date of Patent: January 25, 2022Assignee: Caterpillar Inc.Inventor: Mircea Dumitru