Patents by Inventor Hiroyuki Ikeda

Hiroyuki Ikeda 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: 20040157378
    Abstract: Wirings connected to a gate electrode of a slave switch circuit cell for substrate bias circuits are respectively electrically connected to a wiring for a power supply potential and a wiring for a reference potential. Thus, the switch operation of the slave switch circuit cell is made invalid. Wirings connected to n wells of respective circuit cells are electrically connected to a wiring for the power supply potential, and wirings connected to p wells of the respective circuit cells are electrically connected to the wiring. Thus, the n wells are fixed to the power supply potential, and the p wells are fixed to the reference potential.
    Type: Application
    Filed: October 29, 2003
    Publication date: August 12, 2004
    Inventors: Hiroyuki Ikeda, Toshio Sasaki, Akinobu Watanabe, Toshio Yamada, Akihisa Uchida
  • Patent number: 6744583
    Abstract: A method for forming a magnetic pattern by applying a first external magnetic field to a magnetic recording medium having a magnetic layer to magnetize uniformly the magnetic layer in a predetermined direction and heating locally the magnetic layer while a second external magnetic field is applied thereto, whereby the heated portion is magnetized in the direction opposite to the predetermined direction, wherein the second external magnetic field has a pulse-like magnetic field component. The method can form a fine magnetic pattern efficiently in a medium for high density recording, and a magnetic recording medium and a magnetic recording device capable of recording with high density can be provided economically in a short time.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: June 1, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Ikeda, Yuzo Seo, Youji Arita
  • Patent number: 6731490
    Abstract: The invention relates to a surge absorber provided with; a surge absorber element composed of a columnar non-conductive member and a conductive film formed dividedly via a discharge gap on a peripheral surface of the non-conductive member, a pair of sealing electrodes disposed at opposite ends of the surge absorber element and touching the conductive film, and a glass tube with opposite ends closed by the sealing electrodes, and the surge absorber element and an inert gas encapsulated thereinside. In the surge absorber of the invention, a face of each sealing electrode which contacts with the surge absorber element is formed in a concave shape symmetrical with a central axis of the glass tube. As a result the surge absorber element can be positioned in the center of the glass tube with high accuracy, the life span and the surge current capacity of the surge absorber can be improved, and low cost and small size becomes possible.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: May 4, 2004
    Assignee: Mitsubishi Materials Corporation
    Inventors: Hiroyuki Ikeda, Takahiro Nakamoto, Masanobu Asami
  • Patent number: 6731446
    Abstract: A method and device for forming a magnetic pattern in a magnetic recording medium, a magnetic recording medium formed thereby and a magnetic recording device that includes a magnetic recording medium formed by this method and/or device. The magnetic recording medium has a magnetic layer, a protective layer, and a lubricant layer formed on a substrate in this order, and the magnetic pattern is formed by locally heating the magnetic layer and applying an external magnetic field to the magnetic layer.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: May 4, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Ikeda, Youji Arita, Masahiro Kawashima, Takeshi Kuriwada, Yuzo Seo
  • Patent number: 6727624
    Abstract: An embedded permanent magnet type induction motor has a rotor that is a lamination of a plurality of rotor core plates (10). The rotor core plate is provided with a plurality of rotor slots (12) each inclined by an angle &agr; with respect to a radial direction of the rotor core plate. The rotor has the axial length L being made of laminations divided into at least two equal portions with respect to its central axis. The divided laminations are combined with one another so that one of the divided laminations is opposed to another in inclination of the angle &agr; and the plurality of rotor slots of one of the divided laminations are respectively superposed on the rotor slots of another at at least their ends closer to the central axis of the rotor to form a skew angle &bgr;.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: April 27, 2004
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Ikuro Morita, Hiroyuki Ikeda, Hidetoshi Hayashi
  • Patent number: 6714131
    Abstract: To provide an anti-thief security sensor assembly wherein an optical axis adjustment of a beam projector can be accurately achieved merely by physically opening a cover of a beam projecting unit while a cover of a beam receiving unit is not opened physically, the anti-thief security sensor assembly includes a beam projecting unit (1) for emitting an infrared beam IR and having a projector cover (21A) mounted on a projector base (20A) so as to cover and protect a sensor circuit. This beam projecting unit (1) includes an opening detecting switch (7) for detecting the physical opening of the projector cover (21A) and a transmission request generating circuit (8) operable in response to the detection by the opening detecting switch (7) to output a received beam level transmission request signal B to the beam receiving unit (2).
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: March 30, 2004
    Assignee: Optex Co., Ltd.
    Inventors: Masashi Iwasawa, Hiroyuki Ikeda, Tsuyoshi Hatano, Fumikatsu Sone
  • Publication number: 20040048556
    Abstract: A half toroidal CVT disk having an inner surface portion, an outer surface portion and a toroidal surface having a given machining allowance is centered with said inner surface portion worked prior to the heat treatment of said half toroidal CVT disk as the standard thereof, and then is chucked by a chuck mechanism. The toroidal surface of the chucked half toroidal CVT disk is ground by a grinding mechanism with the grinding wheel for grinding the half toroidal CVT disk in a state that one of said half toroidal CVT disk and said tool is inclined at a given angle with respect to the other.
    Type: Application
    Filed: August 12, 2003
    Publication date: March 11, 2004
    Applicant: NSK LTD.
    Inventors: Yuko Kamamura, Hiroyuki Ikeda, Hisashi Machida, Hiroshi Terakubo
  • Patent number: 6696946
    Abstract: An anti-thief security sensor assembly wherein the alignment of the respective optical axes of the beam projecting unit and receiving unit with each other can be performed continuously over a required length of time is provided which includes a beam projecting unit (1) for emitting an infrared beam (IR), and a beam receiving unit (2) for receiving the infrared beam (IR) emitted from the beam projecting unit (1). The beam projecting unit (1) includes a first switch (16) adapted to be activated when a cover (10) protecting the beam projecting unit (1) is removed and for outputting a discriminative signal (B) descriptive of removal of such cover, and a transmitting circuit (17) for transmitting the discriminative signal (B) from the beam projecting unit (1) to the beam receiving unit (2), and a recognizing circuit (28) for receiving the discriminative signal (B) and outputting a notifying signal necessary to generate an alarm indicative of the removal of the cover (10).
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: February 24, 2004
    Assignee: Optex Co., Inc.
    Inventors: Masashi Iwasawa, Hiroyuki Ikeda
  • Patent number: 6683595
    Abstract: An object of the invention is to improve moving-picture quality of an active matrix type liquid crystal display apparatus. The apparatus comprises liquid crystal pixels disposed in matrix configuration, a line drive circuit sequentially scanning each line of the pixels at every frame repeating with a predetermined frequency, and a column drive circuit writing image signal into the pixels in sync with the sequential scanning. The frame is divided into a preceding and following sub-frame. The line drive circuit scans sequentially for the preceding and following sub-frame. The column drive circuit writes image signal originally assigned to a frame into the pixels for the preceding sub-frame, and then writes an image signal for adjusting image quality into the pixels for the following sub-frame. The image signal for adjusting image quality is obtained by operating the image signal assigned to the frame and an image signal assigned to the next frame.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: January 27, 2004
    Assignee: Sony Corporation
    Inventor: Hiroyuki Ikeda
  • Patent number: 6663471
    Abstract: A half toroidal CVT disk having an inner surface portion, an outer surface portion and a toroidal surface having a given machining allowance is centered with said inner surface portion worked prior to the heat treatment of said half toroidal CVT disk as the standard thereof, and then is chucked by a chuck mechanism. The toroidal surface of the chucked half toroidal CVT disk is ground by a grinding mechanism with the grinding wheel for grinding the half toroidal CVT disk in a state that one of said half toroidal CVT disk and said tool is inclined at a given angle with respect to the other.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: December 16, 2003
    Assignee: NSK Ltd.
    Inventors: Yuko Kamamura, Hiroyuki Ikeda, Hisashi Machida, Hiroshi Terakubo
  • Publication number: 20030218587
    Abstract: An object of the invention is to improve moving-picture quality of an active matrix type liquid crystal display apparatus. The apparatus comprises liquid crystal pixels disposed in matrix configuration, a line drive circuit sequentially scanning each line of the pixels at every frame repeating with a predetermined frequency, and a column drive circuit writing image signal into the pixels in sync with the sequential scanning. The frame is divided into a preceding and following sub-frame. The line drive circuit scans sequentially for the preceding and following sub-frame. The column drive circuit writes image signal originally assigned to a frame into the pixels for the preceding sub-frame, and then writes an image signal for adjusting image quality into the pixels for the following sub-frame. The image signal for adjusting image quality is obtained by operating the image signal assigned to the frame and an image signal assigned to the next frame.
    Type: Application
    Filed: April 2, 2003
    Publication date: November 27, 2003
    Inventor: Hiroyuki Ikeda
  • Publication number: 20030193397
    Abstract: To provide an anti-thief security sensor assembly in which the angle of an optical unit can be adjusted over a wide range without increasing the size thereof and in which an optical axis can easily be adjusted, the security sensor assembly includes an optical unit (14) mounted at its lateral sides on a support member (9) of a device body (4) for rotation about a horizontal pivot axis (24) for projecting or receiving a detecting wave. A drive gear (29) is rotatably mounted on the support member (9) and positioned laterally of the optical unit (14) and adapted to be manually turned. A driven gear (39) is mounted on a lateral side of the optical unit (14) and is drivingly meshed with the drive gear (29). The driven gear (39) is rotatable together with the optical unit (14) about a horizontal pivot axis (11).
    Type: Application
    Filed: April 8, 2003
    Publication date: October 16, 2003
    Inventor: Hiroyuki Ikeda
  • Patent number: 6632034
    Abstract: A printing machine for booklet-like medium (2) is disclosed as having a booklet resting surface (4) to which a sheet insertion passage (5) is opened, a booklet pressing unit (10) which presses booklet-like medium, which is centrally unfolded on the booklet resting surface at a bound portion (2b) and whose sheet (2a1) of a page to be printed and inserted through the sheet insertion passage, against the booklet resting surface, a print page positioning unit (40) composed of a pair of sheet hazing rollers (42a, 42b) for positioning the sheet (2a1), of the page to be printed, at a given print position, and a print head section (18) having a pair of right and left print heads (19a, 19b) mounted at both sides of the sheet (2a1) of the page to be printed, respectively.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: October 14, 2003
    Assignee: Riso Kagaku Corporation
    Inventors: Hiroyuki Ikeda, Susumu Oshio, Hiroyuki Sunagawa, Hideo Watanabe, Hiroshi Hanzawa
  • Publication number: 20030110004
    Abstract: An intersection between a first circular arc traced around a given measuring point on a toroidal surface on one side by the extreme end of a segment with a length equal to the curvature radius of traction surfaces of discs and a second circular arc traced around a given measuring point on a toroidal surface on the other side by the extreme end of the segment is obtained in a cross section along the central axis of the power roller. A plurality of intersections are obtained by repeating the process for obtaining the intersection for each of different measuring points on the toroidal surfaces. That specific one of the intersections which is situated nearest to the reference surface of the power roller is selected and it is concluded that the selected intersection is the tilting center of the discs.
    Type: Application
    Filed: January 17, 2003
    Publication date: June 12, 2003
    Applicant: NSK LTD.
    Inventors: Hiroyuki Ikeda, Yuko Kamamura
  • Patent number: 6572442
    Abstract: A grinding apparatus for grinding a spline ball groove on a workpiece comprises a rod-shaped grindstone, having a distal end portion with a curved surface corresponding to the groove to be ground, and a spindle mechanism for rotating the grindstone. The spindle mechanism and the grindstone are supported by means of a supporter in a manner such that they are inclined at a given angle to an axis of the workpiece. A rotary dresser, which has a dress groove corresponding to the curved surface of the distal end portion of the grindstone, is disposed near the grinding apparatus. The grindstone can be reciprocated along the axis of the workpiece by a drive mechanism between the workpiece and the dresser without changing its angle of inclination.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: June 3, 2003
    Assignee: NSK Ltd.
    Inventors: Akio Sakai, Takaji Iwasawa, Katsuyuki Yamamoto, Hiroyuki Ikeda, Masami Tanaka
  • Patent number: 6553330
    Abstract: An intersection between a first circular arc traced around a given measuring point on a toroidal surface on one side by the extreme end of a segment with a length equal to the curvature radius of traction surfaces of discs and a second circular arc traced around a given measuring point on a toroidal surface on the other side by the extreme end of the segment is obtained in a cross section along the central axis of the power roller. A plurality of intersections are obtained by repeating the process for obtaining the intersection for each of different measuring points on the toroidal surfaces. That specific one of the intersections which is situated nearest to the reference surface of the power roller is selected and it is concluded that the selected intersection is the tilting center of the discs.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: April 22, 2003
    Assignee: NSK Ltd.
    Inventors: Hiroyuki Ikeda, Yuko Kamamura
  • Publication number: 20030058104
    Abstract: To provide an anti-thief security sensor assembly wherein an optical axis of a beam projecting unit can be accurately aligned with that of a beam receiving unit, the anti-thief security sensor assembly includes a beam projecting unit 1 for projecting an infrared beam IR and a beam receiving unit 8 for receiving the infrared beam IR. The beam projecting unit 1 includes a projector cover 21A detachably mounted on a mounting base 20A for enclosing and protecting a sensor circuit on the mounting base 20A, an opening detecting switch 7 for detecting a physical opening of the projector cover 21A, and a projected beam suppressing circuit 4 operable in response to detection by the opening detecting switch 7 to reduce a quantity of the infrared beam emitted from the beam projecting unit 1 to thereby reproduce the infrared beam of a quantity substantially equal to that having passed through the projector cover 21A.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 27, 2003
    Inventors: Masashi Iwasawa, Tsuyoshi Hatano, Hiroyuki Ikeda
  • Publication number: 20030058094
    Abstract: To provide an anti-thief security sensor assembly wherein an optical axis adjustment of a beam projector can be accurately achieved merely by physically opening a cover of a beam projecting unit while a cover of a beam receiving unit is not opened physically, the anti-thief security sensor assembly includes a beam projecting unit (1) for emitting an infrared beam IR and having a projector cover (21A ) mounted on a projector base (20A) so as to cover and protect a sensor circuit. This beam projecting unit (1) includes an opening detecting switch (7) for detecting the physical opening of the projector cover (21A) and a transmission request generating circuit (8) operable in response to the detection by the opening detecting switch (7) to output a received beam level transmission request signal B to the beam receiving unit (2).
    Type: Application
    Filed: September 20, 2002
    Publication date: March 27, 2003
    Inventors: Masashi Iwasawa, Hiroyuki Ikeda, Tsuyoshi Hatano, Fumikatsu Sone
  • Publication number: 20030052781
    Abstract: An anti-thief security sensor assembly wherein the alignment of the respective optical axes of the beam projecting unit and receiving unit with each other can be performed continuously over a required length of time is provided which includes a beam projecting unit (1) for emitting an infrared beam (IR), and a beam receiving unit (2) for receiving the infrared beam (IR) emitted from the beam projecting unit (1). The beam projecting unit (1) includes a first switch (16) adapted to be activated when a cover (10) protecting the beam projecting unit (1) is removed and for outputting a discriminative signal (B) descriptive of removal of such cover, and a transmitting circuit (17) for transmitting the discriminative signal (B) from the beam projecting unit (1) to the beam receiving unit (2), and a recognizing circuit (28) for receiving the discriminative signal (B) and outputting a notifying signal necessary to generate an alarm indicative of the removal of the cover (10).
    Type: Application
    Filed: September 17, 2002
    Publication date: March 20, 2003
    Inventors: Masashi Iwasawa, Hiroyuki Ikeda
  • Publication number: 20030035235
    Abstract: A method for forming a magnetic pattern by applying a first external magnetic field to a magnetic recording medium having a magnetic layer to magnetize uniformly the magnetic layer in a predetermined direction and heating locally the magnetic layer while a second external magnetic field is applied thereto, whereby the heated portion is magnetized in the direction opposite to the predetermined direction, wherein the second external magnetic field has a pulse-like magnetic field component.
    Type: Application
    Filed: August 7, 2002
    Publication date: February 20, 2003
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hiroyuki Ikeda, Yuzo Seo, Youji Arita