Patents by Inventor Keiichi Yoshii

Keiichi Yoshii 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).

  • Patent number: 10585345
    Abstract: A photomask blank (1) having: a transparent substrate (10); a first film (11) etched by chlorine/oxygen-based dry etching and made of a material having resistance against fluorine-based dry etching; and a second film (12) formed adjacent to the first film and made of a material which comprises silicon and oxygen or silicon, oxygen, and nitrogen and has an Si—Si bond and which is substantially not etched by chlorine/oxygen-based dry etching, wherein: the photoresist adhesive performance is improved; the resist pattern is stably maintained without degrading, collapsing, or peeling even when a fine resist pattern is formed from a photoresist film; and an excellent shape and dimensional accuracy is obtained in regard to etching of a lower layer film in which the resist pattern is used.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: March 10, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Shigeo Irie, Takashi Yoshii, Keiichi Masunaga, Yukio Inazuki, Hideo Kaneko, Toyohisa Sakurada
  • Patent number: 9683761
    Abstract: In an integration valve, a body, in which a vapor-liquid separating space is provided, includes a fixed throttle decompressing liquid-phase refrigerant, a liquid-phase refrigerant side valve body member opening or closing a liquid-phase refrigerant passage, and a vapor-phase refrigerant side valve body member opening or closing a vapor-phase refrigerant passage. Further, the vapor-phase refrigerant side valve body member is configured by a differential pressure regulating valve operated based on a pressure difference between a refrigerant pressure at a side of the vapor-phase refrigerant passage and a refrigerant pressure at a side of the liquid-phase refrigerant passage. The vapor-phase refrigerant side valve body member is movable when the liquid-phase refrigerant side valve body member is moved by a solenoid. Therefore, a cycle configuration of a heat pump cycle configuring a gas injection cycle can be simplified.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: June 20, 2017
    Assignee: DENSO CORPORATION
    Inventors: Tetsuya Itou, Teruyuki Hotta, Atsushi Inaba, Yukihiko Takeda, Shigeji Ohishi, Keiichi Yoshii
  • Patent number: 9109823
    Abstract: A vapor-liquid separating space is provided in a body. The body houses a fixed throttle-decompressing liquid-phase refrigerant, and an integration valve member selectively opening or closing a liquid-phase refrigerant passage and a vapor-phase refrigerant passage. The integration valve member is moved by a stepping motor connected to the integration valve member via a shaft. Accordingly, a cycle configuration of a heat pump cycle working as a gas injection cycle can be simplified.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: August 18, 2015
    Assignee: DENSO CORPORATION
    Inventors: Tetsuya Itou, Yukihiko Takeda, Teruyuki Hotta, Atsushi Inaba, Keiichi Yoshii, Shigeji Ohishi
  • Publication number: 20140290772
    Abstract: A vapor-liquid separating space is provided in a body. The body houses a fixed throttle-decompressing liquid-phase refrigerant, and an integration valve member selectively opening or closing a liquid-phase refrigerant passage and a vapor-phase refrigerant passage. The integration valve member is moved by a stepping motor connected to the integration valve member via a shaft. Accordingly, a cycle configuration of a heat pump cycle working as a gas injection cycle can be simplified.
    Type: Application
    Filed: October 2, 2012
    Publication date: October 2, 2014
    Applicant: DENSO CORPORATION
    Inventors: Tetsuya Itou, Yukihiko Takeda, Teruyuki Hotta, Atsushi Inaba, Keiichi Yoshii, Shigeji Ohishi
  • Publication number: 20140238067
    Abstract: In an integration valve, a body, in which a vapor-liquid separating space is provided, includes a fixed throttle decompressing liquid-phase refrigerant, a liquid-phase refrigerant side valve body member opening or closing a liquid-phase refrigerant passage, and a vapor-phase refrigerant side valve body member opening or closing a vapor-phase refrigerant passage. Further, the vapor-phase refrigerant side valve body member is configured by a differential pressure regulating valve operated based on a pressure difference between a refrigerant pressure at a side of the vapor-phase refrigerant passage and a refrigerant pressure at a side of the liquid-phase refrigerant passage. The vapor-phase refrigerant side valve body member is movable when the liquid-phase refrigerant side valve body member is moved by a solenoid. Therefore, a cycle configuration of a heat pump cycle configuring a gas injection cycle can be simplified.
    Type: Application
    Filed: October 2, 2012
    Publication date: August 28, 2014
    Applicant: DENSO CORPORATION
    Inventors: Tetsuya Itou, Teruyuki Hotta, Atsushi Inaba, Yukihiko Takeda, Shigeji Ohishi, Keiichi Yoshii
  • Patent number: 8201415
    Abstract: In an integrated unit including an evaporator and an ejector located inside a tank of the evaporator, a first vibration-isolating seal member and a second vibration-isolating seal member are disposed in a gap between an outer surface of the ejector and an inner surface of the tank. The first vibration-isolating seal member is located between a refrigerant discharge port and a refrigerant suction port of the ejector in a longitudinal direction, and the second vibration-isolating seal member is located between a refrigerant flow inlet of the ejector and the refrigerant suction port in the longitudinal direction. Furthermore, the first vibration-isolating seal member has a seal capability lower than that of the second vibration-isolating seal member, and a vibration isolation capability higher than that of the second vibration-isolating seal member.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: June 19, 2012
    Assignee: Denso Corporation
    Inventors: Masaya Nakamura, Thuya Aung, Tomoya Ishii, Keiichi Yoshii
  • Publication number: 20090311111
    Abstract: An ejector includes a nozzle, a body portion and a pressurizing portion. The body portion has a fluid suction port from which a fluid is drawn by a jet flow of a fluid jetted from the nozzle, and a fluid suction passage through which the fluid drawn from the fluid suction port flows while a flow direction of the drawn fluid is changed. The fluid suction passage has a suction inlet part, a suction space part, and a suction outlet part from which the fluid from the suction space part flows out in a jet direction of the jet fluid. A fluid passage area of the suction inlet part is smaller than an open area of the fluid suction port and a fluid passage area of the suction space part, and the fluid passage area of the suction outlet part is smaller than that of the suction space part.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 17, 2009
    Applicant: DENSO CORPORATION
    Inventor: Keiichi Yoshii
  • Publication number: 20080314074
    Abstract: In an integrated unit including an evaporator and an ejector located inside a tank of the evaporator, a first vibration-isolating seal member and a second vibration-isolating seal member are disposed in a gap between an outer surface of the ejector and an inner surface of the tank. The first vibration-isolating seal member is located between a refrigerant discharge port and a refrigerant suction port of the ejector in a longitudinal direction, and the second vibration-isolating seal member is located between a refrigerant flow inlet of the ejector and the refrigerant suction port in the longitudinal direction. Furthermore, the first vibration-isolating seal member has a seal capability lower than that of the second vibration-isolating seal member, and a vibration isolation capability higher than that of the second vibration-isolating seal member.
    Type: Application
    Filed: June 11, 2008
    Publication date: December 25, 2008
    Applicant: DENSO CORPORATION
    Inventors: Masaya Nakamura, Thuya Aung, Tomoya Ishii, Keiichi Yoshii
  • Patent number: 7310961
    Abstract: A heat exchange portion is configured by arranging a condenser for air conditioning, an EV radiator, and a FC radiator in one plane substantially perpendicular to a direction in which a fuel cell vehicle moves, at a front portion of the fuel cell vehicle, in order of an operating temperature, from an upper position to a lower position. A fan is provided behind the heat exchange portion such that a center thereof is closer to the condenser than to the FC radiator. In addition, a fan shroud is provided, in which plural ram pressure holes are formed in a portion which covers the FC radiator.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: December 25, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Jun Hoshi, Minobu Mizuno, Mitsuru Kimata, Susumu Ichikawa, Keiichi Yoshii, Akira Yamanaka, Yoshihiko Sonoda, Hiroshi Nonoyama
  • Patent number: 7086246
    Abstract: A cooling circuit of a cooling apparatus for a fuel cell comprises a compressor for compressing a gaseous refrigerant, an external heat exchanger arranged on the downstream side of the compressor and for liquefying the compressed refrigerant, a pressure-reducing means arranged on the downstream side of the external heat exchanger, and an accumulator for storing the refrigerant which cools a fuel cell stack main body. The stack main body is connected to the cooling circuit between the pressure-reducing means and the accumulator and a four-way valve is arranged between the compressor and the external heat exchanger, and between the stack main body and the accumulator in the cooling circuit, and the four-way valve introduces the refrigerant from the compressor to the external heat exchanger during the cooling operation, and introduces it to the stack main body during the warming-up operation.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: August 8, 2006
    Assignee: DENSO Corporation
    Inventors: Keiichi Yoshii, Yukihiko Takeda
  • Publication number: 20050279113
    Abstract: A heat exchange portion is configured by arranging a condenser for air conditioning, an EV radiator, and a FC radiator in one plane substantially perpendicular to a direction in which a fuel cell vehicle moves, at a front portion of the fuel cell vehicle, in order of an operating temperature, from an upper position to a lower position. A fan is provided behind the heat exchange portion such that a center thereof is closer to the condenser than to the FC radiator. In addition, a fan shroud is provided, in which plural ram pressure holes are formed in a portion which covers the FC radiator.
    Type: Application
    Filed: June 13, 2005
    Publication date: December 22, 2005
    Inventors: Jun Hoshi, Minobu Mizuno, Mitsuru Kimata, Susumu Ichikawa, Keiichi Yoshii, Akira Yamanaka, Yoshihiko Sonoda, Hiroshi Nonoyama
  • Publication number: 20050022550
    Abstract: A cooling circuit of a cooling apparatus for a fuel cell comprises a compressor for compressing a gaseous refrigerant, an external heat exchanger arranged on the downstream side of the compressor and for liquefying the compressed refrigerant, a pressure-reducing means arranged on the downstream side of the external heat exchanger, and an accumulator for storing the refrigerant which cools a fuel cell stack main body. The stack main body is connected to the cooling circuit between the pressure-reducing means and the accumulator and a four-way valve is arranged between the compressor and the external heat exchanger, and between the stack main body and the accumulator in the cooling circuit, and the four-way valve introduces the refrigerant from the compressor to the external heat exchanger during the cooling operation, and introduces it to the stack main body during the warming-up operation.
    Type: Application
    Filed: February 24, 2004
    Publication date: February 3, 2005
    Inventors: Keiichi Yoshii, Yukihiko Takeda
  • Patent number: 6594896
    Abstract: Residual stress generated in strip metal W is removed by annealing the strip metal W which has gone through a pressing process, and a compressing process is implemented thereafter whereby, as portions hardened due to work-hardening (in particular, folded portions 121) can be softened, the strip metal W which has gone through the pressing process can be easily compressed so that the radius of curvature of the folded portions 121 is reduced to a predetermined dimension, thereby making it possible to improve the dimensional accuracy of the finished fin 120 even if the fin 120 is made of a metal having a relatively high hardness (stainless steel).
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: July 22, 2003
    Assignee: Denso Corporation
    Inventors: Shinichi Morihira, Kiyokazu Futami, Yuuji Sako, Keiichi Yoshii
  • Publication number: 20020124404
    Abstract: Residual stress generated in strip metal W is removed by annealing the strip metal W which has gone through a pressing process, and a compressing process is implemented thereafter whereby, as portions hardened due to work-hardening (in particular, folded portions 121) can be softened, the strip metal W which has gone through the pressing process can be easily compressed so that the radius of curvature of the folded portions 121 is reduced to a predetermined dimension, thereby making it possible to improve the dimensional accuracy of the finished fin 120 even if the fin 120 is made of a metal having a relatively high hardness (stainless steel).
    Type: Application
    Filed: March 11, 2002
    Publication date: September 12, 2002
    Inventors: Shinichi Morihira, Kiyokazu Futami, Yuuji Sako, Keiichi Yoshii
  • Patent number: 6182741
    Abstract: An air conditioner includes a case accommodating an evaporator having a core portion and a lower tan disposed at a bottom of the core portion. The case has a recess portion disposed at an upstream air side of the evaporator, and a covering wall is formed to extend upwardly from the bottom of the recess portion to cover only the lower tank at an immediately upstream air side. When air passes through the evaporator, alien substances contained in air collide with the evaporator and fall to be deposited in the recess portion. Therefore, the deposition of the alien substances do not directly adhere to the lower tank of the evaporator to prevent the evaporator from being corroded.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: February 6, 2001
    Assignee: Denso Corporation
    Inventors: Keiichi Yoshii, Sadayuki Kamiya
  • Patent number: 6098703
    Abstract: A refrigerant passage formed by a pair of metallic thin plates therebetween is divided into many subpassages by a corrugated inner fin. The subpassages are independent from one another and are elongated in the longitudinal direction of the thin plates. An inlet tank portion is provided at an end of the refrigerant passage, and communicating portions are provided between the inlet tank portion and the subpassages. One of the communicating portions provided at an air upstream side in an air flow direction has a flow resistance of refrigerant smaller than that of the other communicating portion provided on an air downstream side. Accordingly, an amount of the refrigerant flowing in the subpassages on the air downstream side is controlled to be smaller than that on the air upstream side.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: August 8, 2000
    Assignee: DENSO Corporation
    Inventor: Keiichi Yoshii
  • Patent number: 5678422
    Abstract: A refrigerant evaporator 5 constructed by a refrigerant-refrigerant heat exchanger section 32 having an inflow passageway 38 and an outflow passageway 39, and a refrigerant-air heat exchanger section 34 having a bottom tank 48, a top tank 49 and evaporating passageways 100 connecting the tanks 48 and 49 with each other. An orifice 33 is arranged between the inflow passageway 38 of the refrigerant-air heat exchanger section 34 and the inlet tank 48 of the refrigerant-air heat exchanger section 34. The refrigerant in the bottom tank 48 is introduced into all of the evaporating passageways 100, so as to obtain a single, upward direction of flow of the refrigerant in the evaporating passageways 100.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: October 21, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Keiichi Yoshii, Masahiro Shimoya
  • Patent number: 5669439
    Abstract: According to the present invention, an outlet tank and an inlet tank are formed in one end side of a plurality of connecting bodies and the bent portions are formed in other end side of the connecting bodies. The plurality of the connecting bodies is formed by a pair of pressed plates and is laminated to form a predetermined space in which the fin is installed, thus creating a laminated type heat exchanger. The bent portions are formed in a bottom end portion of the connecting body, and in the remaining bottom end portion of the surface, there is formed an extending portion which extends to a side lower than the bottom end portion of the fin. Therefore, even when the condensed water becomes a water drop between the surface of the connecting body and the surface of the fin, the drop does not stay for a long time and is efficiently drained by the extending portion downwardly.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: September 23, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Etsuo Hasegawa, Masatoshi Sudo, Toshiya Nagasawa, Keiichi Yoshii
  • Patent number: 5653283
    Abstract: According to the present invention, the tube element includes a connecting portion for connecting the pair of core plates at an upstream air side, an extending portion extending from each of the connecting portions of the core plate at the upstream air side and having a fin connecting portion connected to the corrugated fin, and a further upstream end portion of the extending portion located at an upstream side of the fin connecting portion which is located away from the corrugated fin to form a predetermined gap with the corrugated fin so as to communicate with the air passage. The extending portion including the fin connecting portion closes the whole space between the tube elements and the adjacent corrugated fins at the more upstream air side of the refrigerant passage, so that the air entering between the tube elements and the adjacent corrugated fins can be substantially shut off.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: August 5, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Keiichi Yoshii, Etsuo Hasegawa, Toshiya Nagasawa, Masatoshi Sudo
  • Patent number: 5632161
    Abstract: A laminate-type evaporator is disclosed which is formed of a main heat exchanger, an auxiliary heat exchanger, and a connecting member integrally brazed, such that brazing performance between the auxiliary heat exchanger and the connecting member is enhanced and moisture does not remain between the auxiliary heat exchanger and the connecting member, while setting brazing temperature to a temperature which does not melt the main heat exchanger and also while shortening brazing time. Convexities are formed on a block joint, and a width of a brazed portion connecting these convexities and an end plate is made to be 5 mm or less. Additionally, a dimension of a clearance between the end plate and block joint is made to be 0.5 mm or more.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: May 27, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Masahiro Shimoya, Toshiya Nagasawa, Keiichi Yoshii, Ryouichi Sanada