Patents by Inventor Yasushi Nakahara
Yasushi Nakahara 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: 20110315098Abstract: An intake-side space around intake ports and an exhaust-side lower space around exhaust ports are provided in a main cooling jacket portion. These spaces are connected to each other. In a sub cooling jacket portion, an exhaust-side upper space is provided at a level above the exhaust-side lower space. The main cooling jacket portion and the sub cooling jacket portion are connected to each other via a cylindrical-hole connecting passage extending vertically and separate from each other vertically via a wall portion in another area than the connecting passage. Accordingly, a cooling device of an engine which can restrain the exhaust gas from being cooled too much improperly is provided.Type: ApplicationFiled: June 22, 2011Publication date: December 29, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Kazuhiro KOSUGI, Yasushi NAKAHARA, Daijirou ISHIMOTO, Minori FUJINO, Kazuhiro OKINO
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Publication number: 20110296684Abstract: This disclosure provides a method of adjusting capacities of combustion chambers of a multi-cylinder engine having a cylinder head with recessed parts that partially form the combustion chambers and a mating surface for mating with a cylinder block, which includes casting a cylinder head material having flat reference surfaces on top of the recessed parts of the cylinder head, machining the cylinder head material to form the mating surface, measuring distances in a height direction from the mating surface to the reference surfaces, respectively, and adjusting machining margins of machining portions of the reference surfaces of the recessed parts based on the measured height direction distances.Type: ApplicationFiled: May 3, 2011Publication date: December 8, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Tsuyoshi Yamamoto, Yasushi Nakahara, Takayuki Yamada, Kazuya Hayashi, Yuichiro Ikeda
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Patent number: 7997250Abstract: Disclosed is an upper structure of an engine having three or more cylinders arranged in a row. A first one of a pair of adjacent cylinders among at least three of the cylinders serially arranged in a cylinder row direction is provided with a second spark plug at a position on an opposite side of a second one of the pair of adjacent cylinders, and the second one of the pair of adjacent cylinders is provided with a second spark plug at a position on an opposite side of the first one of the pair of adjacent cylinders. The present invention can provide enhanced flexibility in design of a head cover of the engine.Type: GrantFiled: November 6, 2008Date of Patent: August 16, 2011Assignee: Mazda Motor CorporationInventors: Yasushi Nakahara, Hidesaku Ebesu, Tsuyoshi Yamamoto, Keiichi Tateishi
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Publication number: 20110114056Abstract: There is provided, in one aspect of the present description, an engine. In one example, the engine comprises a cylinder block, a cylinder head, a sheet metal gasket interposed between the block and the head, a first projection projecting outwardly and laterally from a side portion of the block, and a second projection projecting outwardly and laterally from a side portion of the head, the first projection and the second projection facing each other along a coupling surface between the block and the head. The engine further comprises an extension extending from a main body of the sheet metal gasket and located between the first projection and the second projection, and a resilient portion which is provided in the extension, formed resiliently in a direction perpendicular to the coupling surface, and compressed between the first projection and the second projection when the head is fastened on the block.Type: ApplicationFiled: November 1, 2010Publication date: May 19, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Naoyuki Abe, Kazuhiro Tomizawa, Yasushi Nakahara, Kiyonori Nagato, Yasuhiro Sudou, Hiroshi Hosokawa, Yuma Miyauchi, Jun Nishikawa, Osamu Torobu, Hiroyuki Abe, Kazuhiro Matsuoka
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Publication number: 20110094473Abstract: Provided is a spark-ignition internal combustion engine capable of ensuring engine output power while setting a geometric compression ratio of an engine body to a high value. In the spark-ignition internal combustion engine, each of a clearance between a top surface (3a) of a piston (3) located at a top dead center position and a lower surface (8a) of each of two intake valves (8) in a full-closed state, and a clearance between the top surface (3a) of the piston (3) located at the top dead center position and a lower surface (9a) of each of two exhaust valves (9) in a full-closed state, is set to 5 mm or more, and a stroke length S of the piston (3) is set to satisfy the following relation: S?0.977×B+18.2, where B is a bore diameter of a cylinder.Type: ApplicationFiled: October 19, 2010Publication date: April 28, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Tsuyoshi GOTO, Hidetoshi KUDOU, Yasushi NAKAHARA, Masami NISHIDA
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Patent number: 7570103Abstract: In a semiconductor circuit device including a first terminal adapted to receive a first voltage and a second terminal adapted to receive a second voltage lower than the first voltage, a capacitive circuit and a short-circuit preventing circuit are provided in series between the first and second terminals. In this case, when the capacitive element is in an insulating (non-conductive) state, the short-circuit preventing circuit is in a conductive state, while, when the capacitive circuit is in a conductive state, the short-circuit preventing circuit is in an insulating state.Type: GrantFiled: December 19, 2006Date of Patent: August 4, 2009Assignee: NEC Electronics CorporationInventors: Eiichirou Watanabe, Yasushi Nakahara
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Publication number: 20090130358Abstract: The present invention provides a water hose which includes an inner layer and an outer layer that are concentric and tube-shaped, and a reinforcement fiber layer that is formed by interweaving reinforcement fibers between the inner layer and the outer layer. The inner layer and the outer layer are formed by vulcanizing a composition for a hose that includes an ethylene-propylene-nonconjugated diene copolymer and an ethylene-butene-nonconjugated diene copolymer such that a mass ratio (ethylene-propylene-nonconjugated diene copolymer/ethylene-butene-nonconjugated diene copolymer) is 80/20 to 30/70. A Mooney viscosity (ML (1+4) 100° C.) of the ethylene-butene-nonconjugated diene copolymer is lower than a Mooney viscosity (ML (1+4) 100° C.) of the ethylene-propylene-nonconjugated diene copolymer.Type: ApplicationFiled: October 23, 2008Publication date: May 21, 2009Applicant: TOYODA GOSEI CO., LTD.Inventors: Mitsugu Ono, Takao Fuma, Yasushi Nakahara, Hidekazu Kurimoto
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Publication number: 20090114174Abstract: Disclosed is an upper structure of an engine having three or more cylinders arranged in a row. A first one of a pair of adjacent cylinders among at least three of the cylinders serially arranged in a cylinder row direction is provided with a second spark plug at a position on an opposite side of a second one of the pair of adjacent cylinders, and the second one of the pair of adjacent cylinders is provided with a second spark plug at a position on an opposite side of the first one of the pair of adjacent cylinders. The present invention can provide enhanced flexibility in design of a head cover of the engine.Type: ApplicationFiled: November 6, 2008Publication date: May 7, 2009Applicant: MAZDA MOTOR CORPORATIONInventors: Yasushi NAKAHARA, Hidesaku EBESU, Tsuyoshi YAMAMOTO, Keiichi TATEISHI
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Publication number: 20080093699Abstract: The semiconductor device includes a plurality of transistors at least having different channel widths from each other. Threshold voltages of those transistors are set to be substantially equal to each other, by using both of substantially the same channel dose for each of those transistors, and work function control using a predetermined metal to be deposited on a gate insulating of those transistors and/or a gate electrode material of each of those transistors (that is, work function control based on a gate structure (gate insulating film and/or gate electrode) with respect to a channel region of each of those transistors).Type: ApplicationFiled: October 18, 2007Publication date: April 24, 2008Applicant: NEC ELECTRONICS CORPORATIONInventors: Tomohisa ABE, Gen Tsutsui, Tadashi Fukase, Yasushi Nakahara, Kiyotaka Imai
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Publication number: 20070284675Abstract: The semiconductor device includes a silicon substrate, an SiO2 film provided so as to be in contact with the upper portion of the silicon substrate, and a p-type MOSFET including a polycrystalline silicon film, which is provided so as to be in contact with the upper portion of the SiO2 film. Further, an interior of the SiO2 film or an interface of the SiO2 film with the polycrystalline silicon film is provided with a region containing at least one metallic element of Hf and Zr at an area density of not higher than 1.3×1014 atoms/cm2.Type: ApplicationFiled: May 11, 2007Publication date: December 13, 2007Applicant: NEC ELECTRONICS CORPORATIONInventors: Naohiko Kimizuka, Yasushi Nakahara
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Publication number: 20070164363Abstract: In a semiconductor circuit device including a first terminal adapted to receive a first voltage and a second terminal adapted to receive a second voltage lower than the first voltage, a capacitive circuit and a short-circuit preventing circuit are provided in series between the first and second terminals. In this case, when the capacitive element is in an insulating (non-conductive) state, the short-circuit preventing circuit is in a conductive state, while, when the capacitive circuit is in a conductive state, the short-circuit preventing circuit is in an insulating state.Type: ApplicationFiled: December 19, 2006Publication date: July 19, 2007Inventors: Eiichirou Watanabe, Yasushi Nakahara
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Patent number: 7202307Abstract: A sulfur curing system EPDM composition in which one or more types of vulcanization accelerators selected from thiazole type and sulfenamide type accelerators and one or more types of vulcanization accelerators selected from dithiocarbamate type and thiuram type accelerators are combined together so as to be compounded into the EPDM composition as a vulcanization accelerator, and an automotive brake system rubber component made of the EPDM composition.Type: GrantFiled: February 21, 2006Date of Patent: April 10, 2007Assignee: Toyoda Gosei Co., Ltd.Inventors: Hidekazu Kurimoto, Kiyomitsu Terashima, Hidenori Hayashi, Yasushi Nakahara
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Publication number: 20060189741Abstract: A sulfur curing system EPDM composition in which one or more types of vulcanization accelerators selected from thiazole type and sulfenamide type accelerators and one or more types of vulcanization accelerators selected from dithiocarbamate type and thiuram type accelerators are combined together so as to be compounded into the EPDM composition as a vulcanization accelerator, and an automotive brake system rubber component made of the EPDM composition.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Applicant: TOYODA GOSEI Co., Ltd.Inventors: Hidekazu Kurimoto, Kiyomitsu Terashima, Hidenori Hayashi, Yasushi Nakahara
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Publication number: 20060049430Abstract: An objective of this invention is to improve an ON-state current of a field-effect transistor. For this purpose, on a single-crystal silicon substrate 101 having a {100} plane as a principal surface are formed a gate electrode 107 extending substantially in a <010> crystal axis direction of the single-crystal silicon or an axis direction equivalent to the <010> crystal axis direction, and in both sides of the gate electrode 107, source/drain regions 129 on the surface of the single-crystal silicon substrate 101. On the surface of the single-crystal silicon substrate 101 in a region directly below the gate electrode 107 are formed a principal surface and an inclined surface 133 oblique to the principal surface along the extension direction of the gate electrode 107.Type: ApplicationFiled: August 22, 2005Publication date: March 9, 2006Applicants: NEC ELECTRONICS CORPORATION, NEC CORPORATIONInventors: Naoki Kasai, Yasushi Nakahara, Hiroshi Kimura, Toshinori Fukai
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Patent number: 4332516Abstract: The disclosed method and apparatus for the downward transfer of concrete eliminate separation of concrete ingredients and drop impact of concrete during concrete placing across a high head, by intermittently feeding concrete to an air-tight chute from the top end thereof while normally keeping the chute top end closed airtightly, the chute having at least one flexible portion adapted to be collapsible upon removal of concrete thereform.Type: GrantFiled: April 23, 1980Date of Patent: June 1, 1982Assignee: Kajima CorporationInventors: Yasushi Nakahara, Tadasuke Ohtomo, Masahiro Yurugi, Takumi Naitoh, Kenichi Kaiho
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Patent number: 4321223Abstract: A process for placing concrete in very deep vertical shafts or the like, by evacuating a substantially vertically disposed flexible hose and then intermittently feeding concrete material through the hose while keeping the hose airtight from the top thereof, so as to avoid separation of concrete ingredients during travelling through a high head.Type: GrantFiled: October 31, 1979Date of Patent: March 23, 1982Inventor: Yasushi Nakahara
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Patent number: 4129008Abstract: A concrete feeding tube, hereinafter referred to as a "tremie tube", is used to feed concrete grout or the like underwater. This tremie tube consists of an outer tube having desired rigidity and a number of through-holes, and an inner tube having desired pliability, the lower end of the inner tube being adapted to be closed with a closure means. The tremie tube is so designed as to be lowered vertically into a body of water with the lower end of the inner tube being closed with the closure means. So lowered, water is introduced through the aforesaid through-holes inwardly of the wall of the outer tube so as to collapse the inner tube with a resulting decrease in buoyancy of the tremie tube. When the lowered end of the outer tube reaches the water bed then fresh hardening-material, such as concrete grout, is fed into the inner tube under pressure so as to inflate the inner tube.Type: GrantFiled: May 25, 1976Date of Patent: December 12, 1978Assignee: Kajima Kensetsu Kabushiki KaishaInventors: Yasushi Nakahara, Tadasuke Ohtomo, Shinichi Yokota, Kazuo Usui