Patents by Inventor Takahiro Oikawa

Takahiro Oikawa 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: 7230830
    Abstract: In a state wherein front ends of latch members 18A and 18B are apart from each other so that the upper surface of an alignment plate/positioning member 24 is outside, a pressing section 12PU of a heat sink member 12 is brought into contact with the periphery of a semiconductor device 22.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: June 12, 2007
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventors: Ryo Ujike, Takahiro Oikawa, Katsumi Suzuki, Eiji Kobori, Eisaku Tsubota
  • Patent number: 6982410
    Abstract: A photoelectric sensor includes: a light projecting section projecting detection medium light to a detection object region; and a light receiving section receiving reflecting light or transmitted light from the detection object region, the sections being in a single piece or in separate pieces. The light projecting section includes: a light source generating the detection medium light; and a light projecting lens for collimating or collecting the detection medium light from the light source to form a beam spot or a light collecting point in the detection object region. The light projecting section further includes: a deflection angle adjusting unit capable of finely adjusting an optical axis deflection angle of the detection medium light projected to the detection object region from the light projecting section.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: January 3, 2006
    Assignee: Omron Corporation
    Inventors: Takahiro Oikawa, Tadashi Senga
  • Publication number: 20050231919
    Abstract: In a state wherein front ends of latch members 18A and 18B are apart from each other so that the upper surface of an alignment plate/positioning member 24 is outside, a pressing section 12PU of a heat sink member 12 is brought into contact with the periphery of a semiconductor device 22.
    Type: Application
    Filed: April 15, 2005
    Publication date: October 20, 2005
    Inventors: Ryo Ujike, Takahiro Oikawa, Katsumi Suzuki, Eiji Kobori, Eisaku Tsubota
  • Patent number: 6855896
    Abstract: In a vehicular lever switch having a resistor at a fixed contact plate to be combined with a pivoting knob, when a passenger charged with static electricity touches the lever, the resistor is to be prevented from being damaged. A fixed contact plate is arranged with a resistor and conductors and extended from both ends thereof in a ring-like shape to constitute a fixed contact. Further, an extended portion extended in a circular arc shape is formed on an outer side of the resistor with a gap from the conductor. Even when the hand of a passenger charged with static electricity touches a vicinity of a pivoting knob and the static electricity is applied to the fixed contact plate, the static electricity flows to the extended portion and is discharged via the conductor and a terminal. Thereby, the resistor is not damaged by static electricity.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: February 15, 2005
    Assignee: Niles Parts Co., Ltd.
    Inventor: Takahiro Oikawa
  • Patent number: 6758684
    Abstract: In an IC socket of an open top type having a plurality of pin type contacts for electrical connection with an IC package inserted thereinto, the IC socket includes a socket body having a base plate, a vertically movable cover, a platform attached to the base plate and having an IC package mounting portion, and edge moving mechanisms each having a latch lever for holding the IC package placed on the platform and adapted to move the IC package from one side to the opposite side for adjusting and correcting the position of the IC package.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: July 6, 2004
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventors: Takahiro Oikawa, Masahiro Kawano
  • Publication number: 20040079871
    Abstract: A photoelectric sensor includes: a light projecting section projecting detection medium light to a detection object region; and a light receiving section receiving reflecting light or transmitted light from the detection object region, the sections being in a single piece or in separate pieces. The light projecting section includes: a light source generating the detection medium light; and a light projecting lens for collimating or collecting the detection medium light from the light source to form a beam spot or a light collecting point in the detection object region. The light projecting section further includes: a deflection angle adjusting unit capable of finely adjusting an optical axis deflection angle of the detection medium light projected to the detection object region from the light projecting section.
    Type: Application
    Filed: August 5, 2003
    Publication date: April 29, 2004
    Applicant: OMRON CORPORATION
    Inventors: Takahiro Oikawa, Tadashi Senga
  • Publication number: 20030234164
    Abstract: In a vehicular lever switch having a resistor at a fixed contact plate to be combined with a pivoting knob, when a passenger charged with static electricity touches the lever, the resistor is to be prevented from being damaged. A fixed contact plate is arranged with a resistor and conductors and extended from both ends thereof in a ring-like shape to constitute a fixed contact. Further, an extended portion extended in a circular arc shape is formed on an outer side of the resistor with a gap from the conductor. Even when the hand of a passenger charged with static electricity touches a vicinity of a pivoting knob and the static electricity is applied to the fixed contact plate, the static electricity flows to the extended portion and discharged via the conductor and a terminal. Thereby, the resistor is not damaged by static electricity.
    Type: Application
    Filed: June 19, 2003
    Publication date: December 25, 2003
    Inventor: Takahiro Oikawa
  • Publication number: 20020187665
    Abstract: In an IC socket of an open top type having a plurality of pin type contacts for electrical connection with an IC package inserted thereinto, the IC socket includes a socket body having a base plate, a vertically movable cover, a platform attached to the base plate and having an IC package mounting portion, and edge moving mechanisms each having a latch lever for holding the IC package placed on the platform and adapted to move the IC package from one side to the opposite side for adjusting and correcting the position of the IC package.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 12, 2002
    Applicant: YAMAICHI ELECTRONICS CO., LTD.
    Inventors: Takahiro Oikawa, Masahiro Kawano
  • Patent number: 5665948
    Abstract: An automobile knob switch assembly comprising an operating lever 1 that has a shaft rod 1a. A terminal plate 2 is inserted into an opening part if of the operating lever 1. A movable plate 3 has a movable contact plate 13 that contacts the stationary contact plates 8 placed in the terminal plate 2, a through hole 3a through which a cylinder part 4a of a moderator 4 is inserted, and latching pieces 3b that are latched onto the moderator 4. The moderator 4 has an elastic claw 4c that is latched onto the shaft rod 1a. A knob 5 has a latching part 5b that is engaged to a latching piece 3e formed in the periphery of the movable plate 3. A second embodiment is disclosed that has two knobs for the rotary switch installed at the tip of the operating lever 15. The construction of the knob switch assembly permits the parts of the switch assembly to be automatically assembled with machines for mass production and reduced costs.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: September 9, 1997
    Assignee: Niles Parts Co., Ltd.
    Inventor: Takahiro Oikawa
  • Patent number: 5521633
    Abstract: A monitoring method for moving vehicles allows the presence of danger to be determined from the magnitude of an optical flow vector. The optical flow vector is detected as a movement of a single point on an object taken over two images, with one image taken at a preceding time and the other image taken at succeeding time in a series of images. A long and narrow window set in a radial direction from a focus of expansion (FOE) of the earlier image is moved in the same direction on the latter image. An optical flow vector of a target point is defined by a vector connecting the midpoint of a location of a subsequent window and the midpoint of a location at which the long and narrow window is set in the earlier image. The location of the subsequent window is determined by minimizing the sum of absolute values of differences in luminance between the long and narrow window and an area of the latter image overlapping such long and narrow window.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: May 28, 1996
    Assignee: Yazaki Corporation
    Inventors: Masato Nakajima, Takahiro Fujishiro, Norio Kitamura, Kazuyuki Sasaki, Takahiro Oikawa, Kouji Ishii
  • Patent number: 5320063
    Abstract: Disclosure is a luminous pointer made of a light emission element of the inorganic substance dispersion type, high in accuracy of reading, and low in cost. The light emission element of the inorganic substance dispersion type is shaped as a rod, and includes a linear metal core, an electrically-insulating reflective layer made of an enamel and disposed on the core, a fluorescent light emission layer which is made of an enamel and a fluorescent substance dispersed therein and is disposed on the reflective layer, an electroconductive film disposed on the light emission layer and capable of being electrically connected to the core, and an outer electrically-insulating layer disposed on the film. The film has at least one slit which has a width smaller than the diameter of the luminous pointer and extends as a luminously visible portion in the longitudinal direction of the film. An intermediate electrically-insulating layer made of an enamel may be provided between the light emission layer and the film.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: June 14, 1994
    Assignee: Yazaki Corporation
    Inventors: Hiroyuki Ogura, Masaya Sugita, Takahiro Oikawa
  • Patent number: 5226324
    Abstract: An angular velocity sensor for detecting angular velocity by converting deflection caused by the coriolis force into an electrical signal. The sensor includes a vibratory member having at least three main surfaces including a first main surface having a driving transducer provided thereon, and second and third surfaces substantially perpendicular to the first main surface respectively, and being parallel to each other, the second and third main surfaces having detecting piezoelectric transducers, respectively. Additionally, support members are connected to the second and third main surfaces to respectively support vibration-steady points of the vibratory member. At least one longitudinal end portion of the vibratory member has a cross-section in such a manner that a length between the second and third main surfaces is shorter than a length of the first main surface. In this manner, the sensitivity of the angular velocity sensor is improved.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: July 13, 1993
    Assignee: Yazaki Corporation
    Inventors: Takahiro Oikawa, Yoshihito Aoki, Naoto Ishikawa
  • Patent number: 5197331
    Abstract: An oscillatory angular speed detecting apparatus is disclosed which includes a pillar-shaped oscillator body and drive and readout piezoelectric transducers attached to first, second, and third surfaces of the oscillator body, the first side surface being perpendicular to the second side surface and the third side surface being parallel to the first side surface, in which vibration of the oscillator body is transduced into a readout signal by the readout transducer. A phase detecting device detects variations of phases of the readout signals, and an amplitude detecting device detects variations of amplitudes of the readout signals, and the angular speed is detected from the phases detected by the phase detecting device and/or the amplitude detected by the amplitude detecting device.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: March 30, 1993
    Assignee: Yazaki Corporation
    Inventor: Takahiro Oikawa
  • Patent number: 4916650
    Abstract: To eliminate the harmful influence of drift when integrating a sensor signal, the sensor signal is integrated from a time point a first predetermined time period before the sensor signal level becomes higher than the perdetermined signal level to a time point a second predetermined time period after the sensor signal level becomes lower than the predetermined signal level.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: April 10, 1990
    Assignee: Yazaki Corporation
    Inventor: Takahiro Oikawa
  • Patent number: 4898031
    Abstract: To increase the stability and sensitivity of a vibrational angular velocity sensor, the vibrator is airtightly housed within a glass vacuum casing whose inside surface is coated with a metallic film. Further, conductive lead pins electrically connected between vibrator signal terminals and a printed circuit board for a signal processing circuit and fixing pins mechanically fixed to the printed circuit board are arranged with a constant length outside the casing in parallel to each other. Further, two vibrator support pins are fixed to the glass casing by glass material. To obtain a high vacuum within the glass casing, a subcasing including a getter is connected to the casing through a connecting tube cut off or sealed after evacuation.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: February 6, 1990
    Assignee: Yazaki Corporation
    Inventors: Takahiro Oikawa, Yoshiyuki Suzuki, Tatsumi Ohtsuka
  • Patent number: 4879658
    Abstract: In a navigation system by which vehicle travel locations are detected by an angular rate sensor and a distance sensor and the detected vehicle travel locations are corrected so as to be displayed along a map road, the display errors are improved by matching a vehicle turn point behind a route judge area to a map branch point; a route judge area is adjusted according to route conditions to an adjacent branch point or detected travel angles or a distance between two adjacent branch points. Further, non-corrected vehicle location data are displayed only within the route judge area to remove unnatural vehicle location display.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: November 7, 1989
    Assignee: Yazaki Corporation
    Inventors: Makoto Takashima, Yoshihito Aoki, Takahiro Oikawa
  • Patent number: 4858080
    Abstract: The headlight moving apparatus comprises a yaw rate sensor, a headlight position sensor, a vehicle speed sensor, a CPU, and a headlight actuator. The CPU calculates an appropriate headlight turning position on the basis of these three sensor signals. Since the yaw rate sensor can directly detect the vehicle turning motion and direction, it is possible to move the headlights right and left more reliably. Therefore, the adjusted headlights can brighten remote forward road surface when the vehicle runs along a curved road.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: August 15, 1989
    Assignee: Yazaki Corporation
    Inventor: Takahiro Oikawa
  • Patent number: 4836023
    Abstract: To increase the quality factor Q of the vibrational angular rate sensor and therefore the sensitivity of the sensor, stabilize the sensor performance, facilitate wiring work, and minimize the sensor, a square pillar shaped vibrator, four vibrator node support pins and an external vibrator support base are all formed integral with each other from a single constant elasticity material block. Further, at least three and preferably four piezoelectric elements are connected to an external circuit via at least three and preferably four separate thin film conductive layers each extending from each piezoelectric element, on and along each vibrator node support pin, to an external vibrator support base.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: June 6, 1989
    Assignee: Yazaki Corporation
    Inventor: Takahiro Oikawa
  • Patent number: D532420
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: November 21, 2006
    Assignee: Omron Corporation
    Inventor: Takahiro Oikawa