Patents by Inventor Yasunori Takei

Yasunori Takei 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).

  • Publication number: 20070153036
    Abstract: A recording head circuit is configured to drive a plurality of recording elements by dividing the plurality of recording elements into a plurality of blocks. The circuit delays not only heat signals, which are used to drive the recording elements in each of the blocks, but also block signals. Consequently, noises are prevented from appearing due to overlapping of signals.
    Type: Application
    Filed: December 11, 2006
    Publication date: July 5, 2007
    Applicant: Canon Kabushiki Kaisha
    Inventors: Yuichiro Akama, Kimiyuki Hayasaki, Masahiko Ogawa, Yasunori Takei
  • Publication number: 20070146437
    Abstract: A liquid discharge head is arranged in a manner that in the cross section of a discharge port in a liquid discharge direction, the discharge port includes: at least one projection that is convex inside the discharge port; a first area, for holding a liquid surface connecting a pillar-shaped liquid that is elongated outside the discharge port; and second areas where a fluid resistance is lower than that in the first area so as to pull the liquid in the discharge port in a direction opposite to the liquid discharge direction; and the first area is formed in the direction in which the projection is convex, and the second areas are formed on both sides of the projection.
    Type: Application
    Filed: March 7, 2007
    Publication date: June 28, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shuichi MURAKAMI, Yasunori Takei
  • Patent number: 7178381
    Abstract: The invention provides a portable gas detector which is equipped with filters for removal of interfering gases, high in convenience for use, easy to exchange the filters, and easy to confirm the time the filters are exchanged. The portable gas detector has a housing in the form of a slim and flat box holdable by grasping with a hand, and a foreside half portion in the interior of the housing is provided as functional part region, in which a plurality of gas sensors are arranged in a state fixed by a holder and a cap, in the interior of which a gas flowing path has been formed. At a position corresponding to at least one gas sensor in the sensor cap exposed to the back surface of the housing, a filter assembly for removal of an interfering gas component related to the gas sensor is detachably provided.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: February 20, 2007
    Assignee: Riken Keiki Co., Ltd.
    Inventors: Shuji Tajima, Yasunori Takei
  • Patent number: 7089779
    Abstract: The invention provides a portable gas detector of a novel structure that is easy to be fabricated as a small-sized one handy to carry and high in convenience for use. The portable gas detector has a housing in the form of a slim and flat box holdable by grasping with a hand, and a foreside half portion in the interior of he housing is provided as a functional part region, and a rear half portion in the interior of the housing is provided as a battery part region. In the functional part region, one of 5 gas sensors is arranged at a curved portion in a gas sensor-arranging region of an L shape as a whole, and 2 gas sensors are arranged in a row in both lateral and vertical directions of the above gas sensor, respectively. A gas sucking means is arranged in a region, the 2 directions of which is sectioned by the gas sensor-arranging region.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: August 15, 2006
    Assignee: Riken Keiki Co., Ltd.
    Inventors: Shuji Tajima, Yasunori Takei
  • Publication number: 20050092064
    Abstract: The invention provides a portable gas detector which is equipped with filters for removal of interfering gases, high in convenience for use, easy to exchange the filters, and easy to confirm the time the filters are exchanged. The portable gas detector has a housing in the form of a slim and flat box holdable by grasping with a hand, and a foreside half portion in the interior of the housing is provided as functional part region, in which a plurality of gas sensors are arranged in a state fixed by a holder and a cap, in the interior of which a gas flowing path has been formed. At a position corresponding to at least one gas sensor in the sensor cap exposed to the back surface of the housing, a filter assembly for removal of an interfering gas component related to the gas sensor is detachably provided.
    Type: Application
    Filed: August 9, 2004
    Publication date: May 5, 2005
    Applicant: Riken Keiki Co., Ltd.
    Inventors: Shuji Tajima, Yasunori Takei
  • Publication number: 20050092065
    Abstract: The invention provides a portable gas detector of a novel structure that is easy to be fabricated as a small-sized one handy to carry and high in convenience for use. The portable gas detector has a housing in the form of a slim and flat box holdable by grasping with a hand, and on the front side in the interior of the housing a circuit board for control is arranged so as to extend along a flat plane direction of the housing. A foreside half portion in the interior of the housing is provided as a functional part region, in which functional members related to a gas detecting operation are arranged, and a rear half portion is provided as a battery part region, in which either one of 3 rod-like dry cells or a chargeable battery pack formed by holding 3 chargeable batteries having the same external shape as the dry cell by a holding frame member in a state arranged in parallel is installed exchangeably with the other.
    Type: Application
    Filed: August 9, 2004
    Publication date: May 5, 2005
    Applicant: Riken Keiki Co., Ltd.
    Inventors: Shuji Tajima, Yasunori Takei
  • Publication number: 20050092063
    Abstract: The invention provides a portable gas detector of a novel structure that is easy to be fabricated as a small-sized one handy to carry and high in convenience for use. The portable gas detector has a housing in the form of a slim and flat box holdable by grasping with a hand, and a foreside half portion in the interior of he housing is provided as a functional part region, and a rear half portion in the interior of the housing is provided as a battery part region. In the functional part region, one of 5 gas sensors is arranged at a curved portion in a gas sensor-arranging region of an L shape as a whole, and 2 gas sensors are arranged in a row in both lateral and vertical directions of the above gas sensor, respectively. A gas sucking means is arranged in a region, the 2 directions of which is sectioned by the gas sensor-arranging region.
    Type: Application
    Filed: August 9, 2004
    Publication date: May 5, 2005
    Applicant: Riken Keiki Co., Ltd.
    Inventors: Shuji Tajima, Yasunori Takei
  • Patent number: 6861929
    Abstract: A plurality of cylindrical inner conductor portions having different diameters are connected with each other to form an inner conductor. The inner conductor portions include high-impedance portions and low-impedance portions. The inner conductor is formed within an outer conductor with a nonuniform inner diameter. The inner conductor is formed so that the axial length of some of the inner conductor portions forming the high-impedance portions is smaller than the axial length of the other inner conductor portions forming the high-impedance portions, and the diameter of the inner conductor portions forming the high-impedance portions is greater than a predetermined minimum diameter.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: March 1, 2005
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kikuo Tsunoda, Masamichi Ando, Yasunori Takei
  • Patent number: 6781476
    Abstract: An inner conductor comprising high impedance portions and low impedance portions alternately connected to each other is disposed in the center of an outer conductor having a substantially square cross-section. Two holes are formed in one side of the outer conductor so as to extend through the wall of the outer conductor. A substantially &pgr;-shaped coupling line comprising a main line portion and probe-connecting portions is formed on the surface of a dielectric substrate. Probes made of conductor rods are connected at the ends, respectively. A resistor is provided at one end of the main line of the coupling line. The other end of the main line functions as an output terminal, and can be connected to an external circuit. The probes are inserted through the holes. The dielectric substrate is disposed inside of the outer conductor at predetermined positions.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: August 24, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kikuo Tsunoda, Yasunori Takei, Hiromitsu Ito
  • Patent number: 6712586
    Abstract: The invention provides a gas suction pump device equipped with a casing having a substantially rectangular frame-like sectional shape and formed slenderly in a gas flowing direction and into a size holdable by grasping with a hand, a control circuit board provided in the casing so as to extend in a longitudinal direction along the upper wall of the casing, a pump unit arranged in a region on the side of one side wall on the lower side of the control circuit board in a state that one end and the other end of a gas flow path defined by the pump unit have been connected to a gas inlet port and a gas outlet port, respectively, and a battery fitting chamber provided in a region on the side of the other side wall. The invention also provides a gas alarm unit constructed by connecting the above pump device to a portable gas alarm device provided with a specific gas feed adapter through a connecting tube.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: March 30, 2004
    Assignee: Riken Keiki Co., Ltd.
    Inventors: Junichi Koyano, Shuji Tajima, Yasunori Takei, Takuo Aida
  • Publication number: 20030184407
    Abstract: An inner conductor comprising high impedance portions and low impedance portions alternately connected to each other is disposed in the center of an outer conductor having a substantially square cross-section. Two holes are formed in one side of the outer conductor so as to extend through the wall of the outer conductor. A substantially &pgr;-shaped coupling line comprising a main line portion and probe-connecting portions is formed on the surface of a dielectric substrate. Probes made of conductor rods are connected at the ends, respectively. A resistor is provided at one end of the main line of the coupling line. The other end of the main line functions as an output terminal, and can be connected to an external circuit. The probes are inserted through the holes. The dielectric substrate is disposed inside of the outer conductor at predetermined positions.
    Type: Application
    Filed: January 8, 2003
    Publication date: October 2, 2003
    Inventors: Kikuo Tsunoda, Yasunori Takei, Hiromitsu Ito
  • Publication number: 20030138329
    Abstract: The invention provides a gas suction pump device equipped with a casing having a substantially rectangular frame-like sectional shape and formed slenderly in a gas flowing direction and into a size holdable by grasping with a hand, a control circuit board provided in the casing so as to extend in a longitudinal direction along the upper wall of the casing, a pump unit arranged in a region on the side of one side wall on the lower side of the control circuit board in a state that one end and the other end of a gas flow path defined by the pump unit have been connected to a gas inlet port and a gas outlet port, respectively, and a battery fitting chamber provided in a region on the side of the other side wall. The invention also provides a gas alarm unit constructed by connecting the above pump device to a portable gas alarm device provided with a specific gas feed adapter through a connecting tube.
    Type: Application
    Filed: July 22, 2002
    Publication date: July 24, 2003
    Applicant: Riken Keiki Co., Ltd.
    Inventors: Junichi Koyano, Shuji Tajima, Yasunori Takei, Takuo Aida
  • Publication number: 20030112101
    Abstract: A plurality of cylindrical inner conductor portions having different diameters are connected with each other to form an inner conductor. The inner conductor portions include high-impedance portions and low-impedance portions. The inner conductor is formed within an outer conductor with a nonuniform inner diameter.
    Type: Application
    Filed: December 17, 2002
    Publication date: June 19, 2003
    Inventors: Kikuo Tsunoda, Masamichi Ando, Yasunori Takei