Patents by Inventor Hiroki Kawai
Hiroki Kawai 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: 12222665Abstract: A fixing device includes a fixing belt configured to heat a recording material, a pressure member configured to press the fixing belt, and a sliding member configured to be in sliding contact with an inner peripheral surface of the fixing belt and being opposed to the pressure member. The pressure member and the fixing belt form a fixing nip portion, and heat and pressure are applied to the recording material at the fixing nip portion to fix a toner image onto the recording material. The sliding member includes a plurality of protrusions on a surface of the sliding member that is in sliding contact with the inner peripheral surface of the fixing belt. The following expressions are satisfied: The fixing belt satisfies the prescribed formula.Type: GrantFiled: February 13, 2023Date of Patent: February 11, 2025Assignee: Canon Kabushiki KaishaInventors: Yasuharu Toratani, Akiyoshi Shinagawa, Hiroshi Miyamoto, Daigo Matsuura, Hiroki Kawai, Ayano Ogata, Asuna Fukamachi, Masanobu Tanaka, Misa Kawashima
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Patent number: 12220954Abstract: To provide a pneumatic tire excellent in steering stability and fuel efficiency at high-speed driving, it is provided a pneumatic tire having a tread portion with a circumferential groove and a belt layer, wherein a monofilament cord is used as a reinforcing cord for the belt layer; the number of arrangements e (lines/5 cm) of the monofilament cords arranged per 5 cm in the tire width direction in the tire radial cross section of the belt layer is 50/5 cm or more; and the distance G (mm) from the surface of the land portion closest to the equatorial plane among land portions separated by the circumferential groove to the monofilament cord, and the loss tangent (30° C. tan ?) when the rubber composition constituting the surface of the tread portion is measured under conditions of temperature: 30° C., initial strain: 5%, dynamic strain: ±1%, frequency: 10 Hz, and deformation mode: tensile, satisfy 30° C. tan ?×G<1.5.Type: GrantFiled: December 28, 2021Date of Patent: February 11, 2025Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Momoka Misaki, Dong Miao, Hiroki Kawai
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Patent number: 12213301Abstract: A semiconductor device includes a first conductive layer extending along a first direction, a semiconductor layer extending along a second direction crossing the first direction, penetrating the first conductive layer, and including an oxide semiconductor, a first insulating layer between the first conductive layer and the semiconductor layer, a second conductive layer provided on one side of the semiconductor layer in the second direction and electrically connected thereto, a third conductive layer provided on the other side of the semiconductor layer in the second direction and electrically connected thereto, an electric conductor extending from the third conductive layer toward the second conductive layer along the semiconductor layer, and a charge storage film between the semiconductor layer and the electric conductor.Type: GrantFiled: February 28, 2022Date of Patent: January 28, 2025Assignee: Kioxia CorporationInventors: Takao Kosaka, Hideto Horii, Hiroki Tokuhira, Kazuya Matsuzawa, Hiroki Kawai
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Publication number: 20250022952Abstract: The trench structure part includes a field plate electrode, a first insulating film, a second insulating film, the second insulating film extending to be more proximate to the first surface than the first insulating film, a gate electrode including a first portion located on the second insulating film, and a second portion located on the first insulating film, the second portion being thicker than the first portion, and a third insulating film. The gate contact part extends from the gate wiring layer toward the second portion and contacts the second portion. The gate contact part is not positioned between the first portion and the gate wiring layer. The first portion is positioned adjacent, in a second direction orthogonal to the first direction, to a lower end portion of the gate contact part contacting the second portion.Type: ApplicationFiled: April 4, 2024Publication date: January 16, 2025Inventors: Hyuga SAITO, Hirofumi KAWAI, Saya SHIMOMURA, Hiroyuki KISHIMOTO, Takuya YASUTAKE, Hiroaki KATOU, Katsura MIYASHITA, Hiroki NEMOTO
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Patent number: 12168371Abstract: To provide pneumatic tires with excellent ride quality during high-speed driving, a pneumatic tire having a tread portion with a circumferential groove and a belt layer, wherein a monofilament cord is used as a reinforcing cord for the belt layer; and the number of arrangements e (lines/5 cm) of the monofilament cords per 5 cm in the tire width direction in the tire radial cross section of the belt layer, the distance G (mm) from the surface of the land portion closest to the equatorial plane among land portions separated by the circumferential groove to the monofilament cord, and the loss tangent (30° C. tan ?) when the rubber composition constituting the surface of the tread portion is measured satisfy (30° C. tan ?×G)/e>0.015 is provided.Type: GrantFiled: December 28, 2021Date of Patent: December 17, 2024Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Momoka Misaki, Dong Miao, Hiroki Kawai
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Patent number: 12147179Abstract: A fixing device includes an endless belt, a rotatable pressing member contacting an outer circumferential surface of the belt, and a sliding member inside of the belt. The sliding member forms a nip portion by nipping and feeding the belt between itself and the rotatable pressing member and slides on an inner circumferential surface of the belt. The rotatable pressing member nips and feeds the recording material in the nip portion in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure. The sliding member includes a substrate extending in a widthwise direction of the belt, and the substrate is made of metal and includes a plurality of projections projecting toward the rotatable pressing member.Type: GrantFiled: January 30, 2023Date of Patent: November 19, 2024Assignee: Canon Kabushiki KaishaInventors: Daigo Matsuura, Yasuharu Toratani, Akiyoshi Shinagawa, Hiroshi Miyamoto, Ayano Ogata, Hiroki Kawai, Masanobu Tanaka, Asuna Fukamachi, Misa Kawashima
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Publication number: 20240375443Abstract: Provided is a pneumatic tire that has substantially improved crack resistance performance and durability performance; and the pneumatic tire has a tread portion with grooves formed on the surface, the tread portion is formed of a first rubber composition constituting a groove bottom portion, and a second rubber composition adjacent to the first rubber composition on the inner side of the groove bottom portion in the tire radial direction; and the acetone extractable content of the first rubber composition: E1 (% by mass) and the acetone extractable content of the second rubber composition: E2 (% by mass) satisfy (E1?E2)<20, and, when the tire is assembled to a standardized rim and the internal pressure is 250 kPa, the cross-sectional width of the tire Wt (mm), the outer diameter Dt (mm), and the volume of the space occupied by the tire: virtual volume V (mm3) satisfy following (formula 1) and (formula 2). 1700 ? ( Dt 2 × ? / 4 ) / W ? t ? 2827.Type: ApplicationFiled: September 1, 2021Publication date: November 14, 2024Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kenji HAMAMURA, Hiroki KAWAI, Subaru TOYA
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Patent number: 12075629Abstract: According to one embodiment, a magnetic memory device including a stacked structure including a first magnetic layer having a variable magnetization direction, a second magnetic layer having a fixed magnetization direction, and a nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, and containing magnesium (Mg) and oxygen (O). The nonmagnetic layer further contains a first additive element and a second additive element, the first additive element is at least one element selected from sulfur (S), gallium (Ga), aluminum (Al), titanium (Ti), vanadium (V), hydrogen (H), fluorine (F), manganese (Mn), lithium (Li), nitrogen (N) and magnesium (Mg), and the second additive element is lithium (Li).Type: GrantFiled: September 23, 2021Date of Patent: August 27, 2024Assignee: Kioxia CorporationInventors: Tadaomi Daibou, Yasushi Nakasaki, Tadashi Kai, Hiroki Kawai, Takamitsu Ishihara, Junichi Ito
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Patent number: 12055877Abstract: A fixing apparatus includes a heating rotary member and a pressing rotary member, which form a nip portion, at which a toner image is fixed to a recording material, a mixture job is a job with a mixture of recording materials including a recording material with a first grammage and a recording material with a second grammage greater than the first grammage, one of a plurality of modes is performable in the mixture job, in which a maximum value of an amount of toner on the recording material with the first grammage is greater than a maximum value of the amount of toner on the recording material with the second grammage in the first mode whereas the maximum value on the recording material with the first grammage is equal to the maximum value on the recording material with the second grammage in the second mode.Type: GrantFiled: March 15, 2023Date of Patent: August 6, 2024Assignee: Canon Kabushiki KaishaInventors: Daigo Matsuura, Hiroki Kawai, Ayano Ogata, Yasuharu Toratani, Misa Kawashima
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Publication number: 20240241468Abstract: An image forming apparatus includes an image forming unit, a heating rotary member, and a pressure rotary member that forms a nip portion with the heating rotary member to perform printing on a first recording material with a first width, a second recording material with a second width and has no image to be formed thereon, and a third recording material with the second width and has an image to be formed thereon. A time period from when the first recording material reaches the nip portion to when the second recording material that has no image to be formed thereon and follows the first recording material reaches the nip portion is shorter than a time period from when the first recording material reaches the nip portion to when the third recording material having an image to be formed thereon that follows the first recording material reaches the nip portion.Type: ApplicationFiled: January 12, 2024Publication date: July 18, 2024Inventor: HIROKI KAWAI
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Publication number: 20240215459Abstract: A memory device of embodiments includes a memory cell including: a first conductive layer; a second conductive layer; a third conductive layer provided between the first conductive layer and the second conductive layer; a variable resistance layer provided between the first conductive layer and the third conductive layer; and a switching layer provided between the third conductive layer and the second conductive layer. The switching layer contains an oxide of a first element, which is at least one element selected from a group consisting of zirconium, yttrium, tantalum, lanthanum, cerium, titanium, hafnium, and magnesium, and a compound of a second element that is at least one element selected from a group consisting of zinc, tin, gallium, indium, and bismuth and a third element that is at least one element selected from a group consisting of tellurium, sulfur, and selenium.Type: ApplicationFiled: September 28, 2023Publication date: June 27, 2024Applicant: Kioxia CorporationInventors: Takeshi IWASAKI, Yosuke MATSUSHIMA, Makoto ONIZAKI, Katsuyoshi KOMATSU, Masakazu GOTO, Hiroki KAWAI, Rina NOMOTO, Kenta CHOKAWA, Zhu QI, Tadaomi DAIBOU
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Publication number: 20240215259Abstract: A memory device of embodiments includes a memory cell including: a first conductive layer; a second conductive layer; a third conductive layer provided between the first conductive layer and the second conductive layer; a switching layer provided between the first conductive layer and the third conductive layer; and a variable resistance layer provided between the third conductive layer and the second conductive layer. The switching layer contains antimony (Sb), a second element, and an oxide of a first element. The first element is at least one element selected from a group consisting of zirconium (Zr), hafnium (Hf), yttrium (Y), tantalum (Ta), lanthanum (La), cerium (Ce), magnesium (Mg), and titanium (Ti). The second element is at least one element selected from a group consisting of carbon (C), boron (B), nitrogen (N), silicon (Si), and tin (Sn).Type: ApplicationFiled: September 29, 2023Publication date: June 27, 2024Applicant: Kioxia CorporationInventors: Yuya SATO, Masakazu GOTO, Hiroki KAWAI, Takeshi IWASAKI, Katsuyoshi KOMATSU
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Publication number: 20240210864Abstract: A fixing device includes an endless belt, a rotatable pressing member, a pad member inside of the belt, and a sliding member held by the pad member and sliding on an inner circumferential surface of the belt in a nip. The rotatable pressing member nips and feeds a recording material in the nip in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure. The sliding member includes a base material layer on which a plurality of projections projecting toward the rotatable pressing member are formed on a side sliding with the belt and a sliding layer provided on an outer surface of the plurality of projections. A shape of a surface of the sliding layer is a curved surface and a radius of curvature R of the curved surface satisfies 300 ?m?R?850 ?m.Type: ApplicationFiled: March 8, 2024Publication date: June 27, 2024Inventors: HIROKI KAWAI, YASUHARU TORATANI, HIROSHI MIYAMOTO, AKIYOSHI SHINAGAWA, AYANO OGATA, DAIGO MATSUURA, MISA KAWASHIMA, MASANOBU TANAKA, ASUNA FUKAMACHI
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Publication number: 20240215467Abstract: A memory device of embodiments includes a memory cell including: a first conductive layer; a second conductive layer; a third conductive layer provided between the first conductive layer and the second conductive layer; a variable resistance layer provided between the first conductive layer and the third conductive layer; and a switching layer provided between the third conductive layer and the second conductive layer. The switching layer contains antimony (Sb), a second element, adn an oxide of a first element. The first element is at least one element selected from a group consisting of zirconium (Zr), hafnium (Hf), yttrium (Y), tantalum (Ta), lanthanum (La), cerium (Ce), magnesium (Mg), and titanium (Ti). The second element is at least one element selected from a group consisting of aluminum (Al), zinc (Zn), and gallium (Ga).Type: ApplicationFiled: September 28, 2023Publication date: June 27, 2024Applicant: Kioxia CorporationInventors: Hiroki KAWAI, Takeshi IWASAKI, Katsuyoshi KOMATSU, Rina NOMOTO, Zhu QI, Takayuki SASAKI
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Patent number: 11982961Abstract: A fixing device includes an endless belt, a rotatable pressing member, a pad member inside of the belt, and a sliding member held by the pad member and sliding on an inner circumferential surface of the belt in a nip. The rotatable pressing member nips and feeds a recording material in the nip in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure. The sliding member includes a base material layer on which a plurality of projections projecting toward the rotatable pressing member are formed on a side sliding with the belt and a sliding layer provided on an outer surface of the plurality of projections. A shape of a surface of the sliding layer is a curved surface and a radius of curvature R of the curved surface satisfies 300 ?m?R?850 ?m.Type: GrantFiled: February 9, 2023Date of Patent: May 14, 2024Assignee: Canon Kabushiki KaishaInventors: Hiroki Kawai, Yasuharu Toratani, Hiroshi Miyamoto, Akiyoshi Shinagawa, Ayano Ogata, Daigo Matsuura, Misa Kawashima, Masanobu Tanaka, Asuna Fukamachi
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Patent number: 11960224Abstract: A fixing device includes an endless belt, a rotatable pressing member, a pad member inside of the belt, and a sliding member held by the pad member and sliding on an inner circumferential surface of the belt in a nip. The rotatable pressing member nips and feeds a recording material in the nip in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure. The sliding member includes a base material layer on which a plurality of projections projecting toward the rotatable pressing member are formed on a side sliding with the belt and a sliding layer provided on an outer surface of the plurality of projections. A leading end of the plurality of projections is a plane and an average roughness (Ra) of the plane satisfies 0.13 ?m?Ra?1.67 ?m.Type: GrantFiled: February 16, 2023Date of Patent: April 16, 2024Assignee: CANON KABUSHIKI KAISHAInventors: Akiyoshi Shinagawa, Yasuharu Toratani, Hiroshi Miyamoto, Daigo Matsuura, Hiroki Kawai, Ayano Ogata, Masanobu Tanaka, Asuna Fukamachi, Misa Kawashima
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Patent number: 11963459Abstract: A switching device according to an embodiment includes a switching layer disposed between a first electrode and a second electrode. The switching layer contains a material containing a first cation element Z, Te, and N. This material contains at least 5 atomic % or more of each of Z, Te, and N, and when an atomic ratio of Te is X, an atomic ratio of N is Y, an atomic ratio of Z is W, a ratio of Z2Te3 to ZN on a straight line connecting a compound of the first cation element Z with tellurium and nitride of the first cation element Z in a ternary phase diagram of Z, Te, and N is A, and a change in an N content from the Z2Te3—ZN line is B, the material has a composition satisfying X=1.2 (1?A) (0.5+B), Y=A (0.5+B), and W=1?X?Y, where ?0.06?B?0.06 is satisfied when ?>A and ¾<A, and ?0.06?B and Y?0.45 are satisfied when ??A?¾.Type: GrantFiled: September 8, 2021Date of Patent: April 16, 2024Assignee: Kioxia CorporationInventors: Hiroshi Takehira, Katsuyoshi Komatsu, Tadaomi Daibou, Hiroki Kawai, Yuichi Ito
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Publication number: 20240066926Abstract: A pneumatic tire having a side portion and a belt layer, monofilament cords are used as reinforcing cords in the belt layer, and in a tire-radial-direction cross-section of the belt layer, an arrangement number e of monofilament cords per 5 cm in a tire width direction (cords/5 cm) and a tire cross-sectional width Wt (mm) when the tire is installed to a standardized rim and an inner pressure is set to 250 kPa satisfies the following (formula 1) and (formula 2): e/(139.5?0.3Wt)>1 ??(formula 1) e/(191.5?0.Type: ApplicationFiled: October 19, 2021Publication date: February 29, 2024Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Momoka MISAKI, Miao DONG, Hiroki KAWAI
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Publication number: 20240051339Abstract: A pneumatic tire having a tread portion and a belt layer, wherein the reinforcing cords in the belt layer are composed of monofilament cords arranged in the tire width direction at least 50 cords/5 cm in the cross section of the belt layer in the tire radial direction. A pneumatic tire that is installed on a standardized rim and satisfies the following (formula 1), where Wt (mm) is the cross-sectional width of the tire and Dt (mm) is the outer diameter of the tire when the internal pressure is 250 kPa: 1500?(Dt2×?/4)/Wt??(formula 1).Type: ApplicationFiled: October 26, 2021Publication date: February 15, 2024Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Momoka MISAKI, Miao DONG, Hiroki KAWAI
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Patent number: D1060422Type: GrantFiled: June 9, 2023Date of Patent: February 4, 2025Assignee: Lenovo (Singapore) Pte. Ltd.Inventors: Hibiki Ikegami, Koji Kawai, Hiroki Kondo