Patents by Inventor Sean D. Lawson
Sean D. Lawson 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: 20240409376Abstract: In some implementations, a counterweight assembly, for a lifting machine, includes a plurality of counterweight slabs, including first and second outer counterweight slabs, and one or more inner counterweight slabs sandwiched between inner lateral surfaces of the first and second outer counterweight slabs. A center slab, of the one or more inner counterweight slabs, includes a lifting eye embedded in a body of the center slab.Type: ApplicationFiled: June 9, 2023Publication date: December 12, 2024Applicant: Caterpillar Inc.Inventors: Simon Tabutin, Sean D. Lawson
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Publication number: 20240367952Abstract: A winch assembly may include a frame including a first plate and a second plate separated from the first plate. The frame may have a set of stepped bores including a first bore in the first plate and a second bore, co-axial with the first bore, in the second plate. The first bore may be larger than the second bore. The winch assembly may include a winch disposed in the frame through the first bore and the second bore. The winch may include a first housing with a first flange extending from the first housing, the first flange connected at an outward surface of the first plate. The winch may include a second housing with a second flange extending from the second housing, the second flange connected at an inward surface of the second plate. The winch may include a drum between the first housing and the second housing.Type: ApplicationFiled: May 2, 2023Publication date: November 7, 2024Applicant: Caterpillar Inc.Inventors: Sean D. LAWSON, Benjamin BARBIER, Simon TABUTIN
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Publication number: 20240182273Abstract: In some implementations, a counterweight assembly, for a lifting machine, includes a plurality of counterweight slabs, including first and second outer counterweight slabs and one or more inner counterweight slabs sandwiched between inner lateral surfaces of the first and second outer counterweight slabs, wherein an outer lateral surface of each outer counterweight slab includes one or more recesses having one or more respective reflective decals disposed therein.Type: ApplicationFiled: December 4, 2022Publication date: June 6, 2024Applicant: Caterpillar Inc.Inventors: Simon Tabutin, Sean D. Lawson
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Patent number: 11511976Abstract: A system for determining a lifting capacity of a pipelayer is provided. The system includes a load sensor configured to generate a signal indicative of a load suspended from a lifting hook, an angle sensor configured to generate a signal indicative of an angular position of a chassis relative to ground surface, a boom position sensor configured to generate a signal indicative of a position of a boom relative to an undercarriage, and a counterweight position sensor configured to generate a signal indicative of a position of a counterweight relative to the undercarriage. The system further includes a controller configured to receive the signal from each of the load sensor, the angle sensor, the boom position sensor, and the counterweight position sensor. The controller is also configured to determine the lifting capacity of the pipelayer based, at least in part, on the received signal.Type: GrantFiled: October 7, 2019Date of Patent: November 29, 2022Assignee: Caterpillar Inc.Inventors: Curtis John Caldwell, Sean D. Lawson, Robert Jackson, Shikha Pokharel Thapa, Aaron Gnagey
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Patent number: 11053104Abstract: A boom for a pipelaying machine includes a pair of posts located in a first plane and disposed in a tapered configuration with respect to a second plane transverse to the first plane. The boom also includes a cross-brace disposed between the pair of posts and located partway along a length of the pair of posts. The cross-brace includes a first link member and a second link member disposed along the first plane. Further, each of the first and second link members are angularly offset from each other and the second plane respectively. Furthermore, ends of the first and second link members are rigidly attached to the pair of posts. The cross-brace further includes a first rib member and a second rib member disposed along the second plane and rigidly attached to the first link member and the second link member respectively.Type: GrantFiled: June 6, 2019Date of Patent: July 6, 2021Assignee: Caterpillar Inc.Inventors: James Michael Dunn, Curtis J Caldwell, Sean D. Lawson, Dana John Willer
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Publication number: 20210101788Abstract: A system for determining a lifting capacity of a pipelayer is provided. The system includes a load sensor configured to generate a signal indicative of a load suspended from a lifting hook, an angle sensor configured to generate a signal indicative of an angular position of a chassis relative to ground surface, a boom position sensor configured to generate a signal indicative of a position of a boom relative to an undercarriage, and a counterweight position sensor configured to generate a signal indicative of a position of a counterweight relative to the undercarriage. The system further includes a controller configured to receive the signal from each of the load sensor, the angle sensor, the boom position sensor, and the counterweight position sensor. The controller is also configured to determine the lifting capacity of the pipelayer based, at least in part, on the received signal.Type: ApplicationFiled: October 7, 2019Publication date: April 8, 2021Applicant: Caterpillar Inc.Inventors: Curtis John Caldwell, Sean D. Lawson, Robert Jackson, Shikha Pokharel Thapa, Aaron Gnagey
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Publication number: 20200385246Abstract: A boom for a pipelaying machine includes a pair of posts located in a first plane and disposed in a tapered configuration with respect to a second plane transverse to the first plane. The boom also includes a cross-brace disposed between the pair of posts and located partway along a length of the pair of posts. The cross-brace includes a first link member and a second link member disposed along the first plane. Further, each of the first and second link members are angularly offset from each other and the second plane respectively. Furthermore, ends of the first and second link members are rigidly attached to the pair of posts. The cross-brace further includes a first rib member and a second rib member disposed along the second plane and rigidly attached to the first link member and the second link member respectively.Type: ApplicationFiled: June 6, 2019Publication date: December 10, 2020Applicant: Caterpillar Inc.Inventors: James Michael Dunn, Curtis J. Caldwell, Sean D. Lawson, Dana John Willer