Patents by Inventor Yoshiki Sakamoto
Yoshiki Sakamoto 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: 11944999Abstract: A vibration device includes a bimorph type piezoelectric element having a first main surface and a second main surface facing each other and a vibration member bonded to the second main surface of the piezoelectric element. The piezoelectric element has a first active region disposed closer to the first main surface between the first and second main surfaces and a second active region disposed closer to the second main surface than the first active region between the first and second main surfaces. When a force generated in the first active region is F1, a force generated in the second active region is F2, and a force by which the vibration member restrains the second active region is Fr, F2?F1?Fr is satisfied.Type: GrantFiled: February 21, 2019Date of Patent: April 2, 2024Assignee: TDK CORPORATIONInventors: Yoshiki Ohta, Hideya Sakamoto, Kazushi Tachimoto, Yoshikazu Shimura, Tetsuyuki Taniguchi, Akihiro Takeda
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Publication number: 20240083518Abstract: A floor mat arranged in a working machine includes a floor portion, a wall portion arranged on a circumferential portion of the floor portion, and an opening portion arranged on a part of a connecting portion of the wall portion, the connecting portion connecting to the floor portion. The floor mat includes a mat main body arranged on the floor portion, a covering portion configured to cover the opening portion, and an connecting portion configured to connect the covering portion flexibly to a circumferential portion of the mat main body.Type: ApplicationFiled: November 22, 2023Publication date: March 14, 2024Applicant: KUBOTA CORPORATIONInventors: Masahiro AIHARA, Shota SAKAMOTO, Akihiro ICHIHARA, Kazuya OI, Yoshiki TAKIZAWA, Kenichi SAIKI
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Patent number: 11930713Abstract: A piezoelectric element includes a piezoelectric body, an electrode layer, and a reinforcing layer. The piezoelectric body has a first main surface, a second main surface, and a side surface. The first main surface and the second main surface oppose each other. The side surface extends in an opposing direction in which the first main surface and the second main surface oppose each other in such a way as to connect the first main surface and the second main surface. The electrode layer is provided in the piezoelectric body. The reinforcing layer is provided on the first main surface. The electrode layer is provided opposing the first main surface and apart from the side surface. When viewed from the opposing direction, the electrode layer has a corner. When viewed from the opposing direction, the reinforcing layer overlaps the corner.Type: GrantFiled: April 3, 2019Date of Patent: March 12, 2024Assignee: TDK CORPORATIONInventors: Yoshiki Ohta, Hideya Sakamoto, Kazushi Tachimoto, Yoshikazu Shimura, Tetsuyuki Taniguchi, Akihiro Takeda
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Patent number: 11525363Abstract: A turbine wheel that retains a fixation wire to inhibit the movement of turbine rotor blades along mating grooves includes: multiple tab sections that form housing sections that house part of the fixation wire; and a wire retention pin to retain the fixation wire in the housing sections. The tab section has a pin slot extending from the radially inner end toward the radially outward side. The wire retention pin has a first pin section having a width smaller than the pin slot and a second pin section having a width larger than the pin slot. The first pin section has multiple divided pieces. The wire retention pin is arranged such that the first pin section is positioned in the pin slot and the second pin section is positioned in the housing section, and is fixed to the tab section with the divided pieces bent outward.Type: GrantFiled: January 28, 2021Date of Patent: December 13, 2022Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yoshiki Sakamoto, Yasuyuki Watanabe, Yoshitaka Sato
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Patent number: 11458545Abstract: A cutting insert may include a base member including a plurality of tungsten carbide particles. In cases where a particle diameter distribution of the tungsten carbide particles is measured at intervals of 0.025 ?m, the particle diameter distribution may include, as a maximum peak and a second peak, a first peak value that appears in a particle diameter range of 0.5-0.9 ?m, and a second peak value that appears in a particle diameter range of 1.1-1.5 ?m. A value of a particle diameter distribution frequency is larger than zero at a valley part where a value of the particle diameter distribution frequency reaches a minimum between the first peak value and the second peak value.Type: GrantFiled: March 22, 2018Date of Patent: October 4, 2022Assignee: KYOCERA CorporationInventors: Tsuyoshi Yamasaki, Yoshiki Sakamoto
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Patent number: 11384645Abstract: A turbine wheel is provided with a groove having a bottom surface and a pair of side wall surfaces. The turbine wheel includes: a balance weight that is arranged in the groove, is insertable from any circumferential position of the opening of the groove, and has a through-hole opened toward one of the pair of side wall surfaces; and a retaining member that contacts the one of the pair of side wall surfaces in a state of being inserted in the through-hole of the balance weight, to thereby cause the balance weight to abut against the other one of the pair of side wall surfaces and be retained in the groove. The groove has engagement recesses provided at intervals in a circumferential direction at the bottom surface or an engagement protrusion fitted to one of fitting recesses provided at intervals in the circumferential direction at the bottom surface and protruding from the bottom surface.Type: GrantFiled: January 27, 2021Date of Patent: July 12, 2022Assignee: Mitsubishi Power, Ltd.Inventors: Shosaku Hiwatashi, Yasuyuki Watanabe, Tadashi Murakata, Yoshiki Sakamoto
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Patent number: 11377968Abstract: Each wheel-side tab section of a turbine wheel is formed such that a bottom surface of a second groove are continuous with bottom surfaces of first grooves that are adjacent thereto. The outline shape of each wheel-side tab section when seen in an axial direction is a shape in which a portion of a particular shape is replaced with straight portions along predetermined straight lines. The particular shape includes a predetermined range of an outline shape of an attachment section as seen in the axial direction. The portion is at least on the radially inward side of the bottom surface of the second groove and is on an outer side, in the circumferential direction, of the predetermined straight lines. The predetermined straight lines pass through a central axis and points within a range along the particular shape from intersections with the bottom surface of the second groove to peaks of wheel-side hook portions adjacent, on the radially inward side, to the bottom surface of the second groove.Type: GrantFiled: January 28, 2021Date of Patent: July 5, 2022Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shota Igarashi, Yasuyuki Watanabe, Tadashi Murakata, Yoshiki Sakamoto
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Publication number: 20210310364Abstract: A turbine wheel that retains a fixation wire to inhibit the movement of turbine rotor blades along mating grooves includes: multiple tab sections that form housing sections that house part of the fixation wire; and a wire retention pin to retain the fixation wire in the housing sections. The tab section has a pin slot extending from the radially inner end toward the radially outward side. The wire retention pin has a first pin section having a width smaller than the pin slot and a second pin section having a width larger than the pin slot. The first pin section has multiple divided pieces. The wire retention pin is arranged such that the first pin section is positioned in the pin slot and the second pin section is positioned in the housing section, and is fixed to the tab section with the divided pieces bent outward.Type: ApplicationFiled: January 28, 2021Publication date: October 7, 2021Inventors: Yoshiki SAKAMOTO, Yasuyuki WATANABE, Yoshitaka SATO
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Publication number: 20210246799Abstract: A turbine wheel is provided with a groove having a bottom surface and a pair of side wall surfaces. The turbine wheel includes: a balance weight that is arranged in the groove, is insertable from any circumferential position of the opening of the groove, and has a through-hole opened toward one of the pair of side wall surfaces; and a retaining member that contacts the one of the pair of side wall surfaces in a state of being inserted in the through-hole of the balance weight, to thereby cause the balance weight to abut against the other one of the pair of side wall surfaces and be retained in the groove. The groove has engagement recesses provided at intervals in a circumferential direction at the bottom surface or an engagement protrusion fitted to one of fitting recesses provided at intervals in the circumferential direction at the bottom surface and protruding from the bottom surface.Type: ApplicationFiled: January 27, 2021Publication date: August 12, 2021Inventors: Shosaku HIWATASHI, Yasuyuki WATANABE, Tadashi MURAKATA, Yoshiki SAKAMOTO
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Publication number: 20210246801Abstract: Each wheel-side tab section of a turbine wheel is formed such that a bottom surface of a second groove are continuous with bottom surfaces of first grooves that are adjacent thereto. The outline shape of each wheel-side tab section when seen in an axial direction is a shape in which a portion of a particular shape is replaced with straight portions along predetermined straight lines. The particular shape includes a predetermined range of an outline shape of an attachment section as seen in the axial direction. The portion is at least on the radially inward side of the bottom surface of the second groove and is on an outer side, in the circumferential direction, of the predetermined straight lines. The predetermined straight lines pass through a central axis and points within a range along the particular shape from intersections with the bottom surface of the second groove to peaks of wheel-side hook portions adjacent, on the radially inward side, to the bottom surface of the second groove.Type: ApplicationFiled: January 28, 2021Publication date: August 12, 2021Inventors: Shota IGARASHI, Yasuyuki WATANABE, Tadashi MURAKATA, Yoshiki SAKAMOTO
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Publication number: 20200047257Abstract: A cutting insert may include a base member including a plurality of tungsten carbide particles. In cases where a particle diameter distribution of the tungsten carbide particles is measured at intervals of 0.025 ?m, the particle diameter distribution may include, as a maximum peak and a second peak, a first peak value that appears in a particle diameter range of 0.5-0.9 ?m, and a second peak value that appears in a particle diameter range of 1.1-1.5 ?m. A value of a particle diameter distribution frequency is larger than zero at a valley part where a value of the particle diameter distribution frequency reaches a minimum between the first peak value and the second peak value.Type: ApplicationFiled: March 22, 2018Publication date: February 13, 2020Inventors: Tsuyoshi YAMASAKI, Yoshiki SAKAMOTO
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Patent number: 10288547Abstract: A facility state analysis device of an embodiment is provided. The device includes an inputter which accepts input of information specifying a state and location of a facility installed outdoors, a calculator which calculates, by performing statistical processing based at least in part on the information specifying the state and location input to the inputter and information on a predetermined section on a map, an average failure year of the facilities in the section, and a display controller which displays, on a display, the average failure year calculated by the calculator superimposed on the map.Type: GrantFiled: March 16, 2017Date of Patent: May 14, 2019Assignee: Tokyo Electric Power Company Holdings, IncorporatedInventors: Mikiyuki Ichiba, Tamotsu Uduki, Hideo Mizuochi, Yuya Niidome, Masaomi Takaoka, Shinsuke Nasukawa, Yuuji Tagawa, Hideaki Sato, Yoshiki Sakamoto, Akihiko Kataoka
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Publication number: 20170184488Abstract: A facility state analysis device of an embodiment is provided. The device includes an inputter which accepts input of information specifying a state and location of a facility installed outdoors, a calculator which calculates, by performing statistical processing based at least in part on the information specifying the state and location input to the inputter and information on a predetermined section on a map, an average failure year of the facilities in the section, and a display controller which displays, on a display, the average failure year calculated by the calculator superimposed on the map.Type: ApplicationFiled: March 16, 2017Publication date: June 29, 2017Applicant: Tokyo Electric Power Company Holdings, IncorporatedInventors: Mikiyuki ICHIBA, Tamotsu UDUKI, Hideo MIZUOCHI, Yuya NIIDOME, Masaomi TAKAOKA, Shinsuke NASUKAWA, Yuuji TAGAWA, Hideaki SATO, Yoshiki SAKAMOTO, Akihiko KATAOKA
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Patent number: 9643257Abstract: [Object] To provide a cutting tool having good chipping resistance and good wear resistance. [Solution] Provided is a cutting tool 1 including a base body 2 whose surface is coated with a coating layer 6 made of CraM1-a (C1-xNx) (here, M is at least one element selected from Ti, Al, Si, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01?a?0.4, and 0?x ?1), a cutting edge 5 is formed on an intersection ridgeline between a rake face 3 and a flank face 4, and the coating layer 6 for the cutting edge 5 has a Cr content ratio greater than a Cr content ratio of the coating layer 6 for the flank face 4.Type: GrantFiled: June 27, 2013Date of Patent: May 9, 2017Assignee: KYOCERA CORPORATIONInventor: Yoshiki Sakamoto
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Patent number: 9579728Abstract: To provide a cutting tool that includes a coating layer capable of exhibiting optimum cutting performance in each of a cutting edge, rake face, and flank face. A cutting tool (1) includes a substrate (2) that is coated with a coating layer (6) composed of SiaM1-a(C1-xNx), where M represents at least one element selected from Ti, Al, Cr, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01?a?0.4, and 0?x?1, and that has a cutting edge (5) at an intersecting ridge line of a rake face (3) and a flank face (4). The Si content ratio in the coating layer (6) on the rake face (3) is higher than that on the cutting edge (5).Type: GrantFiled: December 25, 2013Date of Patent: February 28, 2017Assignee: Kyocera CorporationInventor: Yoshiki Sakamoto
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Publication number: 20150343535Abstract: PROBLEM: To provide a cutting tool that includes a coating layer capable of exhibiting optimum cutting performance in each of a cutting edge, rake face, and flank face. RESOLUTION MEANS: A cutting tool (1) includes a substrate (2) that is coated with a coating layer (6) composed of SiaM1-a(C1-xNx), where M represents at least one element selected from Ti, Al, Cr, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01?a?0.4, and 0?x?1, and that has a cutting edge (5) at an intersecting ridge line of a rake face (3) and a flank face (4). The Si content ratio in the coating layer (6) on the rake face (3) is higher than that on the cutting edge (5).Type: ApplicationFiled: December 25, 2013Publication date: December 3, 2015Inventor: Yoshiki SAKAMOTO
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Publication number: 20150328690Abstract: [Object] To provide a cutting tool having good chipping resistance and good wear resistance. [Solution] Provided is a cutting tool 1 including a base body 2 whose surface is coated with a coating layer 6 made of CraM1-a (C1-xNx) (here, M is at least one element selected from Ti, Al, Si, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01?a?0.4, and 0?x ?1), a cutting edge 5 is formed on an intersection ridgeline between a rake face 3 and a flank face 4, and the coating layer 6 for the cutting edge 5 has a Cr content ratio greater than a Cr content ratio of the coating layer 6 for the flank face 4.Type: ApplicationFiled: June 27, 2013Publication date: November 19, 2015Inventor: Yoshiki Sakamoto
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Patent number: 9085032Abstract: A cutting tool including a base member and a coating layer. The base member includes a rake face and a flank face. The coating layer has a composition represented by a first chemical formula of CraM1-a(C1-xNx), wherein M represents at least one selected from Ti, Al, Si, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01?a?0.5, and 0?x?1. The coating layer is disposed on the base member and includes a cutting edge at an intersecting ridge line between the rake face and the flank face. The coating layer further comprises droplets thereon. An average composition of the droplets disposed on the rake face has a Cr content higher than the Cr content of the average composition of the droplets disposed on the flank face.Type: GrantFiled: July 25, 2012Date of Patent: July 21, 2015Assignee: KYOCERA CORPORATIONInventors: Yoshiki Sakamoto, Masahiro Waki, Yaocan Zhu
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Patent number: 9013179Abstract: A VR resolver 120 and an MR sensor 114 are mounted to a shaft 103. The VR resolver 120 and the MR sensor 114 are formed so as to have a shaft angle multiplier of not less than 2. The difference of the shaft angle multiplier between the VR resolver 120 and the MR sensor 114 is made to be 1. An absolute angle of the shaft 103 is calculated based on a difference between an angle calculated from an output of the VR resolver 120 and an angle calculated from an output of the MR sensor 114. Since the VR resolver 120 and the MR sensor 114 have a different failure mode, redundancy against failure is reliably obtained.Type: GrantFiled: February 15, 2012Date of Patent: April 21, 2015Assignee: Minebea Co., Ltd.Inventors: Yoshiki Sakamoto, Wataru Nogamida
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Publication number: 20140271000Abstract: A cutting tool including a base member and a coating layer. The base member includes a rake face and a flank face. The coating layer has a composition represented by a first chemical formula of CraM1-a(C1-xNx), wherein M represents at least one selected from Ti, Al, Si, W, Mo, Ta, Hf, Nb, Zr, and Y, 0.01?a?0.5, and 0?x?1. The coating layer is disposed on the base member and includes a cutting edge at an intersecting ridge line between the rake face and the flank face. The coating layer further comprises droplets thereon. An average composition of the droplets disposed on the rake face has a Cr content higher than the Cr content of the average composition of the droplets disposed on the flank face.Type: ApplicationFiled: July 25, 2012Publication date: September 18, 2014Applicant: Kyocera CorporationInventors: Yoshiki Sakamoto, Masahiro Waki, Yaocan Zhu