Patents by Inventor Seiji Tamaki
Seiji Tamaki 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: 20240140642Abstract: A packing member, a toner container, and a packing method. The packing member contains the toner container, and the packing member includes a box containing the toner container with a gap between one side of the box and a container body and between the one side of the box and a large-dimension portion of the toner container, a first pressing portion that presses the container body, and a second pressing portion that presses the large-dimension portion. In the packing member, the large-dimension portion of the toner container is disposed at one end of the container body, and the large-dimension portion has a wider dimension than the container body in a direction orthogonal to a longitudinal direction of the toner container. In the packing member, the container body contacts, with first contact force, a first bearer inside the box to maintain the gap.Type: ApplicationFiled: October 26, 2023Publication date: May 2, 2024Inventors: Shuntaroh TAMAKI, Seiji TERAZAWA, Yosio SANO, Teruo SHIBATA, Tatsuya KUBO
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Publication number: 20230193847Abstract: Provided is a cylinder liner which can reduce the friction of the sliding surface from conventional levels and improve fuel efficiency without increasing oil consumption from conventional levels. When the inner circumferential surface of a cylinder liner or cylinder bore used in an internal combustion engine has a first sliding region, a second sliding region, and a third sliding region, and when respective surface roughness Rvk is from 0.05 ?m to 0.3 ?m, from 0.4 ?m to 1.5 ?m, and from 0.15 ?m to 0.7 ?m, a friction can be reduced while maintaining oil consumption.Type: ApplicationFiled: June 11, 2020Publication date: June 22, 2023Inventors: Seiji Tamaki, Takashi Oizumi
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Patent number: 11680537Abstract: The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 ?m than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.Type: GrantFiled: November 6, 2019Date of Patent: June 20, 2023Assignees: TPR Co., Ltd., IPR Industry Co., Ltd.Inventors: Masayuki Ohira, Naoki Umeda, Seiji Tamaki, Takashi Sato, Takashi Oizumi
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Publication number: 20220372929Abstract: The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 ?m than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.Type: ApplicationFiled: November 6, 2019Publication date: November 24, 2022Inventors: Masayuki Ohira, Naoki Umeda, Seiji Tamaki, Takashi Sato, Takashi Oizumi
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Patent number: 10890255Abstract: Under a state in which the combination oil ring is mounted in an oil ring groove before inserted into a cylinder bore, when an inclined surface of an upper ear portion of an expander spacer is held in contact with an inner peripheral surface of an upper segment and an inclined surface of a lower ear portion of the expander spacer is held in contact with an inner peripheral surface of a lower segment, an upper protrusion amount (P1) from an outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the upper segment is larger than a lower protrusion amount (P2) from the outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the lower segment. When the combination oil ring is inserted into the cylinder bore, the sealing performance can be improved to reduce the oil consumption.Type: GrantFiled: July 30, 2018Date of Patent: January 12, 2021Assignee: TPR CO., LTD.Inventors: Seeroku Hoshino, Hirofumi Osada, Seiji Tamaki
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Publication number: 20200256277Abstract: To reduce a friction, and to provide an excellent seizing resistance. Provided is a cast iron cylinder liner including an inner peripheral sliding surface made of cast iron, and an internal combustion engine including a cylinder bore including an inner peripheral sliding surface made of cast iron, wherein the inner peripheral sliding surface includes a region satisfying Expression (1) to Expression (3), Rvk/Rk?1.0 ??Expression (1) 0.08 ?m?Rk?0.3 ?m Expression (2) Rk?Rpk>0 Expression (3) [Rk is the core roughness depth based on JIS B0671-2:2002, Rpk is the reduced peak height based on JIS B0671-2:2002, and Rvk is the reduced valley depth based on JIS B0671-2:2002 in Expression (1) to Expression (3)].Type: ApplicationFiled: July 5, 2019Publication date: August 13, 2020Applicants: TPR CO., LTD., TPR INDUSTRY CO., LTD.Inventors: Kiyoyuki KAWAI, Shinji AMAIKE, Tetsuya NANGO, Seiji TAMAKI, Seeroku HOSHINO, Wataru SUZUKI, Takashi OIZUMI, Hiroshi YAGUCHI, Takashi SUZUKI
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Publication number: 20200166135Abstract: Under a state in which the combination oil ring is mounted in an oil ring groove before inserted into a cylinder bore, when an inclined surface of an upper ear portion of an expander spacer is held in contact with an inner peripheral surface of an upper segment and an inclined surface of a lower ear portion of the expander spacer is held in contact with an inner peripheral surface of a lower segment, an upper protrusion amount (P1) from an outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the upper segment is larger than a lower protrusion amount (P2) from the outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the lower segment. When the combination oil ring is inserted into the cylinder bore, the sealing performance can be improved to reduce the oil consumption.Type: ApplicationFiled: July 30, 2018Publication date: May 28, 2020Applicant: TPR CO., LTD.Inventors: Seeroku HOSHINO, Hirofumi OSADA, Seiji TAMAKI
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Patent number: 10571024Abstract: Provided is an oil ring. A shape of an outer peripheral surface of an upper segment arranged on an engine combustion chamber side has a symmetrical curved shape. A shape of an outer peripheral surface of a lower segment arranged on a side away from the engine combustion chamber is a symmetrical curved shape.Type: GrantFiled: July 24, 2017Date of Patent: February 25, 2020Assignee: TPR CO., LTD.Inventors: Kentaro Kawano, Seiji Tamaki
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Publication number: 20190360585Abstract: Provided is an oil ring. A shape of an outer peripheral surface of an upper segment arranged on an engine combustion chamber side has a symmetrical curved shape. A shape of an outer peripheral surface of a lower segment arranged on a side away from the engine combustion chamber is a symmetrical curved shape.Type: ApplicationFiled: July 24, 2017Publication date: November 28, 2019Inventors: Kentaro KAWANO, Seiji TAMAKI
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Patent number: 7077402Abstract: A combined oil ring 4 is comprised of an oil ring 5 having upper and lower rails 7 and 8, and an expander 6 for applying contact pressure radially outwards on the oil ring 5. The outer circumferential surface 11 of the upper rail 7 of the oil ring 5 is comprised of a flat surface 11a with an axial width of 0.05 to 0.3 millimeters, a curved surface 11b joining to the upper end of the flat surface 11a and to the upper surface 12 of the upper rail 7, and a curved surface 11c joining to the lower end of the flat surface 11a and to the lower surface 13 of the upper rail 7. The lower rail 8 is formed in the same way.Type: GrantFiled: December 5, 2003Date of Patent: July 18, 2006Assignee: Teikoku Piston Ring Co., Ltd.Inventors: Masakazu Katumaru, Seiji Tamaki, Masami Kawasaki
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Publication number: 20040119242Abstract: A combined oil ring 4 is comprised of an oil ring 5 having upper and lower rails 7 and 8, and an expander 6 for applying contact pressure radially outwards on the oil ring 5. The outer circumferential surface 11 of the upper rail 7 of the oil ring 5 is comprised of a flat surface 11a with an axial width of 0.05 to 0.3 millimeters, a curved surface 11b joining to the upper end of the flat surface 11a and to the upper surface 12 of the upper rail 7, and a curved surface 11c joining to the lower end of the flat surface 11a and to the lower surface 13 of the upper rail 7. The lower rail 8 is formed in the same way.Type: ApplicationFiled: December 5, 2003Publication date: June 24, 2004Applicant: TEIKOKU PISTON RING CO., LTD.Inventors: Masakazu Katumaru, Seiji Tamaki, Masami Kawasaki