Patents by Inventor Hiroyuki Aizawa

Hiroyuki Aizawa 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: 20070120449
    Abstract: Provided is an angular velocity sensor which is thin, requires no individual adjustment and can control the generation of signals that are unnecessary to the angular velocity sensor and are generated on the sensing electrodes when the tuning fork is made to vibrate in the X-axis direction, and a method for manufacturing the angular velocity sensor. Centers (8d) and (9d) of top electrodes (8c) and (9c) as components of detection units are shifted by ?W from centers (10) and (11) of main surfaces (3a) and (3b) of arms (1a) and (1b) of the tuning fork vibrator towards side surfaces (3c) and (3e) adjacent to main surfaces (3a) and (3b), respectively.
    Type: Application
    Filed: June 30, 2005
    Publication date: May 31, 2007
    Inventors: Hiroyuki Aizawa, Satoshi Ohuchi, Takeshi Yamamoto
  • Patent number: 7184293
    Abstract: A crosspoint-type ferroelectric memory is provided. In the crosspoint-type ferroelectric memory, a first memory cell array and a second memory cell array are stacked with a first interlayer insulating layer and a second interlayer insulating layer therebetween. The first memory cell array includes lower electrodes formed in stripes, upper electrodes formed in stripes in a direction that crosses the lower electrodes, ferroelectric capacitors that are disposed at least at intersecting parts of the lower electrodes and the upper electrodes, and an embedded insulating layer formed between the ferroelectric capacitors. The interlayer insulating layer includes a conductive layer between a first insulating layer and a second insulating layer.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: February 27, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Kazumasa Hasegawa, Hiroyuki Aizawa
  • Publication number: 20060272412
    Abstract: Provided are an angular velocity sensor with improved reliability by preventing an electric short circuit resulting from etching debris left on the bottom electrode after the etching of the conductive layers, and a method for manufacturing the angular velocity sensor. The drive electrode unit, the monitor electrode unit and the sensing electrode unit are each provided with bottom electrode (29) formed on substrate (33) having the shape of a tuning fork, piezoelectric film (30) made of piezoelectric material and formed on bottom electrode (29), and top electrode (31) formed on piezoelectric film (30). Ends (31T) of top electrode (31) are located inside ends (30T) of piezoelectric film (30) so as to expose ends (30T) of piezoelectric film (30) beyond top electrode (31), thereby forming exposed parts (32). When exposed parts (32) have a thickness of “t”, piezoelectric film (30) is made to have an exposed width (L) of not less than 0.3 t.
    Type: Application
    Filed: June 23, 2005
    Publication date: December 7, 2006
    Applicant: ATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Satoshi Ohuchi, Hiroyuki Aizawa, Toshiyuki Nozoe
  • Publication number: 20060150733
    Abstract: An angular velocity sensor includes a tuning fork vibrator, a drive unit provided on the tuning folk vibrator, and a detection unit for detecting an amount of deflection of the tuning folk vibrator. The tuning fork vibrator includes a first vibrating arm having a first end and a second end and having a fundamental vibration frequency, a second vibrating arm having a first end and a second end and having the fundamental vibration frequency, and a coupling portion for coupling the first end of the first vibrating arm to the first end of the second vibrating arm. The drive unit is provided on the first vibrating arm and causes the first vibrating arm to vibrate. The drive unit has a driving resistance. The detection unit is provided on one of the first vibrating arm and the second vibrating arm, and detects an amount of deflection of the one of the first vibrating arm and the second vibrating arm when deflecting due to an angular velocity applied to the tuning fork vibrator.
    Type: Application
    Filed: February 1, 2005
    Publication date: July 13, 2006
    Inventors: Satoshi Ohuchi, Hiroyuki Aizawa
  • Publication number: 20060090565
    Abstract: An angular velocity sensor is provided with an oscillator including a pair of drive arms, a base portion coupled to one end of each drive arm, and a flexible arm extending from the base portion in a direction opposite from the drive arms. This angular velocity sensor is also provided with driving member which oscillates the pair of drive arms in approaching or separating direction, and distortion detecting member which detects a distortion of the flexible arm in the oscillating direction of the drive arms.
    Type: Application
    Filed: November 1, 2005
    Publication date: May 4, 2006
    Inventors: Satoshi Ohuchi, Toshiyuki Nozoe, Hiroyuki Aizawa
  • Publication number: 20050117431
    Abstract: A crosspoint-type ferroelectric memory is provided. In the crosspoint-type ferroelectric memory, a first memory cell array and a second memory cell array are stacked with a first interlayer insulating layer and a second interlayer insulating layer therebetween. The first memory cell array includes lower electrodes formed in stripes, upper electrodes formed in stripes in a direction that crosses the lower electrodes, ferroelectric capacitors that are disposed at least at intersecting parts of the lower electrodes and the upper electrodes, and an embedded insulating layer formed between the ferroelectric capacitors. The interlayer insulating layer includes a conductive layer between a first insulating layer and a second insulating layer.
    Type: Application
    Filed: October 27, 2004
    Publication date: June 2, 2005
    Inventors: Kazumasa Hasegawa, Hiroyuki Aizawa
  • Patent number: 6816771
    Abstract: An intake air control system for an internal combustion engine is provided which comprises an intake throttle valve that controls an intake air quantity of air flowing into the engine, an EGR valve that controls a quantity of exhaust gas recirculated back to a portion of an intake system of the engine downstream of the intake throttle valve, and a control unit that controls the intake throttle valve and the EGR valve in accordance with an operating condition of the engine. The control unit includes a target opening area calculating section that calculates a target opening area of the intake throttle valve based on a target EGR ratio corresponding to the operating condition of the engine, and a control section that controls an opening degree of the intake throttle valve based on the target opening area. An intake air control method is also provided.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: November 9, 2004
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Manabu Miura, Hiroyuki Aizawa, Takashi Shirakawa
  • Publication number: 20040043187
    Abstract: The laminated structure comprises a lightweight and shape-retaining foamed resin base member, an outer circumference frame integrally laminated on the reverse side of the formed resin base member along the outer circumference of an article, and bridging ribs connecting between respective points on the outer circumference frame. Accordingly, the present invention provides a lightweight laminated structure with low cost by reducing the amount of the resin used, since the molded synthetic resin comprising the outer circumference frame and bridging ribs has a small projection area.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 4, 2004
    Inventors: Tetsuyuki Ota, Masahiko Hara, Tatsushi Ohno, Hiroyuki Aizawa, Kiyohiko Obara
  • Publication number: 20030188712
    Abstract: An intake air control system for an internal combustion engine is provided which comprises an intake throttle valve that controls an intake air quantity of air flowing into the engine, an EGR valve that controls a quantity of exhaust gas recirculated back to a portion of an intake system of the engine downstream of the intake throttle valve, and a control unit that controls the intake throttle valve and the EGR valve in accordance with an operating condition of the engine. The control unit includes a target opening area calculating section that calculates a target opening area of the intake throttle valve based on a target EGR ratio corresponding to the operating condition of the engine, and a control section that controls an opening degree of the intake throttle valve based on the target opening area. An intake air control method is also provided.
    Type: Application
    Filed: March 21, 2003
    Publication date: October 9, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Manabu Miura, Hiroyuki Aizawa, Takashi Shirakawa
  • Patent number: 6380302
    Abstract: The present invention provides a surfactant composition for emulsion polymerization. The surfactant composition for emulsion polymerization comprises a compound (a) represented by the formula (I) and having a critical micelle concentration (CMC) in the range of from not less than 0.007 mol L−1 to not more than 0.1 mol L−1 and a compound (b) represented by the formula (II) and having a CMC in the range of from not less than 1×10−5 mol L−1 to less than 0.007 mol L−1, as essential components, and the molar ratio of the components (a) to (b) in terms of (a)/(b) is from 5/95 to 75/25: R1O—(A1O)m—SO3M1  (I) R2O—(A2O)n—SO3M2  (II) (in the formulae, R1 and R2 are monovalent aliphatic hydrocarbon groups; A1 and A2 are alkylene groups having 2 to 4 carbons; m and n are numbers from 1 to 50; and M1 and M2 are monovalent cations).
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: April 30, 2002
    Assignee: Kao Corporation
    Inventors: Takayuki Ikenaga, Atsuhito Mori, Hiroyuki Aizawa, Hiroki Sawada, Yasuo Ishii, Yoshinori Mitsuda
  • Patent number: 6298299
    Abstract: At least an engine speed, an opening of an accelerator and an amount of an intake air are detected as an engine operating condition. A standard volume for injecting fuel oil is calculated on the basis of at least the engine speed and the opening of the accelerator. A target injection timing of fuel is set on the basis of the engine speed and the standard volume for injecting fuel oil. An actual fuel injection timing is detected. A standard target EGR rate is calculated on the basis of the engine speed, the amount of the intake air and the standard volume for injecting fuel oil. An amount of adjustment of a target EGR rate is calculated on the basis of the standard volume for injecting fuel oil, the target fuel injection timing and the actual fuel injection timing. A final target EGR rate is set on the basis of the standard target EGR rate and the amount of adjustment. An EGR is controlled on the basis of the final target EGR rate.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: October 2, 2001
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroyuki Itoyama, Hiroyuki Aizawa
  • Patent number: 6214114
    Abstract: A coating apparatus includes: a conveyor for conveying an object to be coated; and a coater for coating a coating liquid by jetting the coating liquid from a slit in a film shape and by causing the coating liquid to collide with the object to be coated. The coater is not in contact with the object to be coated, and a clearance of a slit exit d (m) of the coater satisfies a relation of 0<d≦5×10−5 (m). The clearance of the slit exit of the coater is smaller than a clearance of a slit inlet through which the coating liquid is injected, the slit has, on a side of the slit exit, slit side surfaces which face each other to be in parallel.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: April 10, 2001
    Assignee: Konica Corporation
    Inventors: Shigetoshi Kawabe, Hiroyuki Aizawa, Seiichi Tobisawa
  • Patent number: 6167342
    Abstract: At least an engine speed, an opening of an accelerator and an amount of an intake air are detected as an engine operating condition. A standard volume for injecting fuel oil is calculated on the basis of at least the engine speed and the opening of the accelerator. A target injection timing of fuel is set on the basis of the engine speed and the standard volume for injecting fuel oil. An actual fuel injection timing is detected. A standard target EGR rate is calculated on the basis of the engine speed, the amount of the intake air and the standard volume for injecting fuel oil. An amount of adjustment of a target EGR rate is calculated on the basis of the standard volume for injecting fuel oil, the target fuel injection timing and the actual fuel injection timing. A final target EGR rate is set on the basis of the standard target EGR rate and the amount of adjustment. An EGR is controlled on the basis of the final target EGR rate.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: December 26, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroyuki Itoyama, Hiroyuki Aizawa
  • Patent number: 6012431
    Abstract: At least an engine speed, an opening of an accelerator and an amount of an intake air are detected as an engine operating condition. A standard volume for injecting fuel oil is calculated on the basis of at least the engine speed and the opening of the accelerator. A target injection timing of fuel is set on the basis of the engine speed and the standard volume for injecting fuel oil. An actual fuel injection timing is detected. A standard target EGR rate is calculated on the basis of the engine speed, the amount of the intake air and the standard volume for injecting fuel oil. An amount of adjustment of a target EGR rate is calculated on the basis of the standard volume for injecting fuel oil, the target fuel injection timing and the actual fuel injection timing. A final target EGR rate is set on the basis of the standard target EGR rate and the amount of adjustment. An EGR is controlled on the basis of the final target EGR rate.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: January 11, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroyuki Itoyama, Hiroyuki Aizawa
  • Patent number: 5547510
    Abstract: An coating apparatus comprises at least two coating bars along which a support member is conveyed in a running direction, wherein a center line mean roughness (Ra) on the edge at the downstream side of the downstream bar is not larger than 0.5 .mu.m and the maximum height (Rmax) on the edge is not larger than 6.0 .mu.m.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: August 20, 1996
    Assignee: Konica Corporation
    Inventors: Hiroyuki Aizawa, Seiichi Tobisawa
  • Patent number: 4754293
    Abstract: An image forming apparatus employing a face-down delivery system in which the plane of the recording medium at any position relative to any other position assumed by the recording medium beginning with a stacking tray and ending with a delivery tray does not exceed 90.degree.. The apparatus includes a detachable cartridge which includes a photosensitive member, a charging device and a cleaning device. In one preferred embodiment, register rollers and fixing rollers are positioned relative to each other such that a substantially zero angular deviation exists in the path traveled by the recording medium between these two pairs of rollers.
    Type: Grant
    Filed: April 2, 1987
    Date of Patent: June 28, 1988
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Aizawa, Mitsuaki Maruyama, Shigeru Sawada, Yasuhiro Gyoutoku, Hiroshi Niki, Kouichi Higashimura, Kenji Aoki
  • Patent number: RE34948
    Abstract: An image forming apparatus employing a face-down delivery system in which the plane of the recording medium at any position relative to any other position assumed by the recording medium beginning with a stacking tray and ending with a delivery tray does not exceed 90.degree.. The apparatus includes a detachable cartridge which includes a photosensitive member, a charging device and a cleaning device. In one preferred embodiment, register rollers and fixing rollers are positioned relative to each other such that a substantially zero angular deviation exists in the path traveled by the recording medium between these two pairs of rollers.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: May 23, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Aizawa, Mitsuaki Maruyama, Shigeru Sawada, Yasuhiro Gyoutoku, Hiroshi Niki, Kouichi Higashimura, Kenji Aoki