Patents by Inventor Weifeng DU
Weifeng DU 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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Patent number: 11873684Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.Type: GrantFiled: February 8, 2021Date of Patent: January 16, 2024Assignee: SF DIAMOND CO., LTD.Inventors: Dongpeng Zhao, Weifeng Du, Tongjian Niu, Tengfei Wen, Chunlin Zhang, Haijiang Fang
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Publication number: 20230416098Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. A radial line extends radially outward from a center axis of the first surface intersects each of a long axis of a subset of a plurality of extensions. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: ApplicationFiled: August 31, 2023Publication date: December 28, 2023Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Publication number: 20230406711Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. The at least one extension of the plurality of extensions includes a first portion that is polyhedral shaped. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: ApplicationFiled: August 31, 2023Publication date: December 21, 2023Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Patent number: 11772977Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: GrantFiled: July 19, 2019Date of Patent: October 3, 2023Assignee: SF Diamond Co., Ltd.Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Patent number: 11377910Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a central part and a peripheral part surrounding the central part. The central part includes a protruding surface relative to the peripheral part. The protruding surface is spherical or planar. The peripheral part includes a plurality of radially-disposed ridges.Type: GrantFiled: August 18, 2019Date of Patent: July 5, 2022Assignee: SF DIAMOND CO., LTD.Inventors: Dongpeng Zhao, Weifeng Du, Shanshan Ma, Tongjian Niu, Haijiang Fang
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Publication number: 20210164296Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.Type: ApplicationFiled: February 8, 2021Publication date: June 3, 2021Inventors: Dongpeng ZHAO, Weifeng DU, Tongjian NIU, Tengfei WEN, Chunlin ZHANG, Haijiang FANG
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Publication number: 20210009426Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: ApplicationFiled: July 19, 2019Publication date: January 14, 2021Applicant: SF Diamond Co., Ltd.Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Publication number: 20190368277Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a central part and a peripheral part surrounding the central part. The central part includes a protruding surface relative to the peripheral part. The protruding surface is spherical or planar. The peripheral part includes a plurality of radially-disposed ridges.Type: ApplicationFiled: August 18, 2019Publication date: December 5, 2019Inventors: Dongpeng ZHAO, Weifeng DU, Shanshan MA, Tongjian NIU, Haijiang FANG
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Publication number: 20190368276Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer disposed on the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a first curved surface, a second curved surface, and a side surface directly connected to the cemented carbide substrate. The first curved surface is connected to the second curved surface. The joint of the first curved surface and the second curved surface protrudes to form a first cutting edge. The joints of the first curved surface and the second curved surface and the side surface protrudes to form a plurality of second cutting edges.Type: ApplicationFiled: August 14, 2019Publication date: December 5, 2019Inventors: Dongpeng ZHAO, Weifeng DU, Shanshan MA, Tongjian NIU, Haijiang FANG
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Publication number: 20190203539Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.Type: ApplicationFiled: March 11, 2019Publication date: July 4, 2019Inventors: Dongpeng ZHAO, Weifeng DU, Tongjian NIU, Tengfei WEN, Chunlin ZHANG, Haijiang FANG
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Patent number: D982046Type: GrantFiled: June 15, 2021Date of Patent: March 28, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Yongfeng Wang, Weifeng Du
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Patent number: D982631Type: GrantFiled: June 15, 2021Date of Patent: April 4, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Yongfeng Wang, Weifeng Du
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Patent number: D982632Type: GrantFiled: June 16, 2021Date of Patent: April 4, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Yongfeng Wang, Weifeng Du
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Patent number: D989826Type: GrantFiled: June 15, 2021Date of Patent: June 20, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Yongfeng Wang, Weifeng Du
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Patent number: D989827Type: GrantFiled: June 16, 2021Date of Patent: June 20, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Yongfeng Wang, Weifeng Du
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Patent number: D996482Type: GrantFiled: October 14, 2021Date of Patent: August 22, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Weifeng Du, Yongfeng Wang, Jian Yang
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Patent number: D996483Type: GrantFiled: October 14, 2021Date of Patent: August 22, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Weifeng Du, Yongfeng Wang, Jian Yang
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Patent number: D997219Type: GrantFiled: October 14, 2021Date of Patent: August 29, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Weifeng Du, Yongfeng Wang, Jian Yang
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Patent number: D1006073Type: GrantFiled: October 14, 2021Date of Patent: November 28, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Weifeng Du, Yongfeng Wang, Jian Yang
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Patent number: D1006074Type: GrantFiled: October 14, 2021Date of Patent: November 28, 2023Assignee: SF DIAMOND CO., LTD.Inventors: Haijiang Fang, Weifeng Du, Yongfeng Wang, Jian Yang