Patents by Inventor Masayuki Niwa
Masayuki Niwa 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: 11835020Abstract: A nozzle body has an injection hole configured to inject fuel and a fuel passage connecting to the injection hole. A needle is configured to open and close the fuel passage to switch between fuel injection from the injection hole and stop of the fuel injection. An injection hole axis is an imaginary line extending along a center of the injection hole. An injection hole perpendicular cross section is a cross section of the injection hole perpendicular to the injection hole axis. The injection hole perpendicular cross section has a flat shape. The injection hole perpendicular cross section has an area that gradually expands from an inlet of the injection hole to an outlet of the injection hole while maintaining a similar shape.Type: GrantFiled: January 6, 2021Date of Patent: December 5, 2023Assignee: DENSO CORPORATIONInventors: Masayuki Niwa, Yosuke Nakagawa, Masahiro Okuma, Noritsugu Kato, Hiroki Kaneta
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Publication number: 20230191964Abstract: A seat back frame is provided with a plurality of upright members, and at least one cross member interconnecting the plurality of upright members. At least one of the plurality of upright members has a weakened region to control deformation of the seat back frame in an impact condition.Type: ApplicationFiled: December 20, 2021Publication date: June 22, 2023Inventor: Masayuki NIWA
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Publication number: 20220106935Abstract: At least one of nozzle holes is provided as a non-circular nozzle hole where the ratio of the longest diameter to the shortest diameter of an outlet opening portion is greater than 1. A virtual non-circular cone and a virtual circular cone are defined for each of the non-circular nozzle hole and a circular nozzle hole where the ratio of the longest diameter to the shortest diameter of the outlet opening portion is 1. At least two adjacent nozzle holes are formed such that the virtual non-circular cone does not interfere with the virtual circular cone or the virtual non-circular cone.Type: ApplicationFiled: December 17, 2021Publication date: April 7, 2022Inventors: Hiroki KANETA, Hajime KATAOKA, Masayuki NIWA, Noritsugu KATOU, Yousuke NAKAGAWA, Masahiro OOKUMA, Sao YOSHIDOME, Gen TAKAI
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Patent number: 11149598Abstract: A fuel injection control device includes an additional energization unit. Concerning an undershoot state caused by a first energization for fuel injection, a return period is an estimated period required for a movable core to return to an initial position from a first energization. An injection interval ranges from the first energization to a second energization that is for a next fuel injection. An allowable period is obtained by subtracting a rise period estimated for the second energization from the return period. The additional energization unit adds an additional energization between the first energization and the second energization when the injection interval is longer than or equal to the allowable period and is shorter than or equal to the return period.Type: GrantFiled: January 24, 2020Date of Patent: October 19, 2021Assignee: DENSO CORPORATIONInventors: Masayuki Niwa, Makoto Saizen, Makoto Tanaka
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Publication number: 20210123403Abstract: A nozzle body has an injection hole configured to inject fuel and a fuel passage connecting to the injection hole. A needle is configured to open and close the fuel passage to switch between fuel injection from the injection hole and stop of the fuel injection. An injection hole axis is an imaginary line extending along a center of the injection hole. An injection hole perpendicular cross section is a cross section of the injection hole perpendicular to the injection hole axis. The injection hole perpendicular cross section has a flat shape. The injection hole perpendicular cross section has an area that gradually expands from an inlet of the injection hole to an outlet of the injection hole while maintaining a similar shape.Type: ApplicationFiled: January 6, 2021Publication date: April 29, 2021Inventors: Masayuki NIWA, Yosuke NAKAGAWA, Masahiro OKUMA, Noritsugu KATO, Hiroki KANETA
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Patent number: 10865753Abstract: An injection hole has an injection hole passage communicating an inner opening with an outer opening. The inner opening is smaller than the outer opening in cross-sectional area. The needle moves in a valve closing direction to abut against a valve seat to restrict a flow of fuel through the injection hole. A first inner wall of the injection hole is located on a valve closing direction side relative to an injection hole axis. A second inner wall of the injection hole is located on an opposite side of the injection hole axis from the valve closing direction side. The injection hole passage is defined by the first inner wall and the second inner wall.Type: GrantFiled: January 13, 2017Date of Patent: December 15, 2020Assignee: DENSO CORPORATIONInventors: Masayuki Niwa, Noritsugu Kato
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Publication number: 20200157980Abstract: A fuel injection control device includes an additional energization unit. Concerning an undershoot state caused by a first energization for fuel injection, a return period is an estimated period required for a movable core to return to an initial position from a first energization. An injection interval ranges from the first energization to a second energization that is for a next fuel injection. An allowable period is obtained by subtracting a rise period estimated for the second energization from the return period. The additional energization unit adds an additional energization between the first energization and the second energization when the injection interval is longer than or equal to the allowable period and is shorter than or equal to the return period.Type: ApplicationFiled: January 24, 2020Publication date: May 21, 2020Inventors: Masayuki NIWA, Makoto SAIZEN, Makoto TANAKA
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Patent number: 10471855Abstract: A cushion frame for a conveyance seat is provided. The cushion frame comprises a first and a second side frame; a connecting member that couples the first side frame to the second side frame; a fixing bracket that comprises a first and a second fixing part; and a belt anchor that is disposed in the fixing bracket and is coupled to a seat belt. The first fixing part comprises a first plate-surface that is substantially parallel to a seat-width axis. The second fixing part comprises a second plate-surface that is substantially perpendicular to the first plate-surface and is situated in the opposite side of the second side frame across the first side frame. The belt anchor is fixed to the second fixing part.Type: GrantFiled: February 20, 2018Date of Patent: November 12, 2019Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Masayuki Niwa
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Publication number: 20190093617Abstract: An injection hole has an injection hole passage communicating an inner opening with an outer opening. The inner opening is smaller than the outer opening in cross-sectional area. The needle moves in a valve closing direction to abut against a valve seat to restrict a flow of fuel through the injection hole. A first inner wall of the injection hole is located on a valve closing direction side relative to an injection hole axis. A second inner wall of the injection hole is located on an opposite side of the injection hole axis from the valve closing direction side. The injection hole passage is defined by the first inner wall and the second inner wall.Type: ApplicationFiled: January 13, 2017Publication date: March 28, 2019Inventors: Masayuki NIWA, Noritsugu KATO
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Patent number: 10093212Abstract: A vehicle seat includes a seat frame; a seat pad; a seat cover; and a support member. An end of the support member is hooked over a receiving portion provided within the seat frame with the support member being disposed within the seat frame. A first portion supported by the support member and a second portion that is not supported by the support member are formed in the seat pad on the seat frame, and a reverse side of the vehicle seat at the second portion is covered with the seat cover extending from a seating side of the seat pad around to the reverse side of the seat pad. A distal portion of the seat cover is retained by a retaining portion provided on a second portion-side end of the support member, the distal portion covering the reverse side of the vehicle seat at the second portion.Type: GrantFiled: September 1, 2016Date of Patent: October 9, 2018Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Masayuki Niwa
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Patent number: 10087875Abstract: A fuel injection valve control device controlling a fuel injection valve that injects a fuel into a combustion chamber includes an operation-condition calculation portion that calculates a fuel injection condition of the fuel injection valve based on a crank angle detected by a crank angle sensor that detects the crank angle of an engine, a current-waveform setting portion that sets a current waveform of a current supplied to the fuel injection valve on the basis of the fuel injection condition calculated by the operation-condition calculation portion, and so on. The current-waveform setting portion sets the current waveform so as to set a temporal change of a pickup current of a needle provided in the fuel injection valve to be equal to or less than a predetermined reference value when a fuel injection start timing is equal to or more than 180 degrees BTDC.Type: GrantFiled: December 22, 2015Date of Patent: October 2, 2018Assignee: DENSO CORPORATIONInventors: Masayuki Niwa, Noritsugu Kato, Makoto Tanaka
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Patent number: 10071660Abstract: A vehicle seat includes: a seat cushion including another member disposed on a back side of a seat pad, and a catching portion provided in the another member; a seatback; a strip attached to the seatback; and a band member provided in the strip. The band member is hooked on the catching portion on a back side of the seat cushion. The catching portion includes a holding part and a guide part. The holding part has an opening that is opened toward a side facing the seat pad. The guide part is a flat part inclined from the opening. The band member is inserted into the opening and placed inside the holding part.Type: GrantFiled: July 28, 2016Date of Patent: September 11, 2018Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Masayuki Niwa
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Publication number: 20180236902Abstract: A cushion frame for a conveyance seat is provided. The cushion frame comprises a first and a second side frame; a connecting member that couples the first side frame to the second side frame; a fixing bracket that comprises a first and a second fixing part; and a belt anchor that is disposed in the fixing bracket and is coupled to a seat belt. The first fixing part comprises a first plate-surface that is substantially parallel to a seat-width axis. The second fixing part comprises a second plate-surface that is substantially perpendicular to the first plate-surface and is situated in the opposite side of the second side frame across the first side frame. The belt anchor is fixed to the second fixing part.Type: ApplicationFiled: February 20, 2018Publication date: August 23, 2018Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Masayuki NIWA
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Publication number: 20180010546Abstract: A fuel injection valve control device controlling a fuel injection valve that injects a fuel into a combustion chamber includes an operation-condition calculation portion that calculates a fuel injection condition of the fuel injection valve based on a crank angle detected by a crank angle sensor that detects the crank angle of an engine, a current-waveform setting portion that sets a current waveform of a current supplied to the fuel injection valve on the basis of the fuel injection condition calculated by the operation-condition calculation portion, and so on. The current-waveform setting portion sets the current waveform so as to set a temporal change of a pickup current of a needle provided in the fuel injection valve to be equal to or less than a predetermined reference value when a fuel injection start timing is equal to or more than 180 degrees BTDC.Type: ApplicationFiled: December 22, 2015Publication date: January 11, 2018Inventors: Masayuki NIWA, Noritsugu KATO, Makoto TANAKA
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Publication number: 20170066356Abstract: A vehicle seat includes a seat frame; a seat pad; a seat cover; and a support member. An end of the support member is hooked over a receiving portion provided within the seat frame with the support member being disposed within the seat frame. A first portion supported by the support member and a second portion that is not supported by the support member are formed in the seat pad on the seat frame, and a reverse side of the vehicle seat at the second portion is covered with the seat cover extending from a seating side of the seat pad around to the reverse side of the seat pad. A distal portion of the seat cover is retained by a retaining portion provided on a second portion-side end of the support member, the distal portion covering the reverse side of the vehicle seat at the second portion.Type: ApplicationFiled: September 1, 2016Publication date: March 9, 2017Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Masayuki NIWA
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Publication number: 20170028894Abstract: A vehicle seat includes: a seat cushion including another member disposed on a back side of a seat pad, and a catching portion provided in the another member; a seatback; a strip attached to the seatback; and a band member provided in the strip. The band member is hooked on the catching portion on a back side of the seat cushion. The catching portion includes a holding part and a guide part. The holding part has an opening that is opened toward a side facing the seat pad. The guide part is a flat part inclined from the opening. The band member is inserted into the opening and placed inside the holding part.Type: ApplicationFiled: July 28, 2016Publication date: February 2, 2017Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Masayuki NIWA
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Patent number: 9084711Abstract: A human healing ability enhancing apparatus includes an airtight part that is capable of being airtight; a decompression pump that decompresses air pressure in the airtight part and communicates with an exhaust port of the airtight part; and an over-decompression prevention device for preventing over-decompression in which the air pressure in the airtight part is lower than a predetermined threshold air pressure.Type: GrantFiled: November 22, 2010Date of Patent: July 21, 2015Inventors: Yukichika Kawakami, Masayuki Niwa
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Publication number: 20120266874Abstract: A human healing ability enhancing apparatus includes an airtight part that is capable of being airtight; a decompression pump that decompresses air pressure in the airtight part and communicates with an exhaust port of the airtight part; and an over-decompression prevention device for preventing over-decompression in which the air pressure in the airtight part is lower than a predetermined threshold air pressure.Type: ApplicationFiled: November 22, 2010Publication date: October 25, 2012Inventors: Yukichika Kawakami, Masayuki Niwa
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Publication number: 20090080821Abstract: A plain bearing capable of suppressing occurrence of bearing damage in a primary load portion is provided. The primary load portion in the center of at least one of the plain bearings that mainly receives load during rotation of a shaft is subjected to inner surface working by broaching so that roughness is 1 ?m Rz or less, while a light load portion at 10° to 60° from a bearing mating surface of the plain bearing that receives load smaller than that received by the primary load portion is subjected to inner surface working of a circumferential fine groove by boring so that the depth is 1 ?m to 15 ?m.Type: ApplicationFiled: September 25, 2008Publication date: March 26, 2009Applicant: DAIDO METAL COMPANY LTD 13F, NAGOYA HIROKOJI BLDGInventors: Takashi ANDOU, Atsushi Okado, Masayuki Niwa
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Patent number: RE39613Abstract: A half bearing constituting a cylindrical plain bearing for supporting a shaft for rotation when two of the half bearings are combined together. The half bearing has two circumferential ends each of which has a plurality of circumferential grooves without formation of any crush relief surface. The grooves extend substantially over an overall circumferential dimension of the half bearing and include portions located at both circumferential ends of the half bearing respectively. Each portion has a larger axially sectional area than the grooves formed in a portion of the half bearing mainly subjected to load during rotation of the shaft.Type: GrantFiled: December 16, 2005Date of Patent: May 8, 2007Assignee: Daido Metal Co., Ltd.Inventors: Masayuki Niwa, Yoshitaka Ito, Mitsuru Sugita, Akira Ono, Susumu Mamiya, Masaaki Sakamoto