Patents by Inventor Takashi Murai

Takashi Murai 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: 6384522
    Abstract: A main body 34 of a shadow mask is opposed to a phosphor screen and is formed in a substantially rectangular shape. The main body 34 has a main surface portion 31 where a number of electron beam apertures are formed, and a skirt portion 33 provided around the main surface portion with a non-aperture portion 32 interposed between the skirt portion and the main surface portion. A plurality of rectangular openings 38a extending in the long axis direction (or X-direction) of the mask body are formed at the skirt portion. Concave portions 47 extending in the long axis direction (X-direction) of the mask body are formed at the non-aperture portion. The openings and concave portions are provided within a range of about ¼ of the length W of the mask body in the long axis direction, with respect to a center of the range defined at a position distant from the short axis Y by about ⅓ of the length W of the long axis direction of the mask body.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: May 7, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Munechika Tani, Takashi Murai, Ichiro Saotome, Masatsugu Inoue
  • Publication number: 20020011772
    Abstract: A skirt portion of a mask body includes cut portions. The width of the cut portions along the minor or major axis ranges from 0.10×L to 0.45×L, where L is the distance from an end of the minor or major axis to a diagonal end, and the height of the cut portions along the tube axis is equal to 5% to 40% of the height of the skirt portion along the tube axis in a region near the minor or major axis.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 31, 2002
    Inventors: Yoshiaki Ito, Shinichiro Nakagawa, Takashi Murai, Masatsugu Inoue
  • Publication number: 20020008458
    Abstract: A deflection yoke of a cathode ray tube apparatus comprises a pair of saddle-type horizontal deflection coils located symmetrically with respect to a central axis and substantially in the shape of a truncated pyramid. A magnetic core substantially in the shape of a truncated cone is located coaxially around the horizontal deflection coils, and a pair of vertical deflection coils are wound on the magnetic core. A relation between a space vf between a large-diameter end portion of the magnetic core and each of the horizontal deflection coils and a space vr between a small-diameter end portion of the magnetic core and each of the horizontal deflection coils, with respect to the direction of a vertical axis perpendicular to the central axis, is given by vf≧vr.
    Type: Application
    Filed: July 20, 2001
    Publication date: January 24, 2002
    Inventors: Nobuhiko Akoh, Tohru Takahashi, Masatsugu Inoue, Takashi Murai, Tadahiro Kojima, Yoshiaki Ito
  • Publication number: 20010052745
    Abstract: A shadow mask includes a mask body having a principal mask surface with electron beam passage apertures, a skirt portion, and long and short axes, and a mask frame attached to outside the skirt portion. The mask frame has a coefficient of thermal expansion higher than that of the mask body. The skirt portion includes first and second tongue portions situated on the short and long axes, respectively. Each of the first and second tongue portions is fixed to the mask frame.
    Type: Application
    Filed: May 24, 2001
    Publication date: December 20, 2001
    Inventors: Takashi Murai, Shinichiro Nakagawa, Yoshiaki Ito
  • Patent number: 6268688
    Abstract: A substantially rectangular shadow mask is arranged opposite to a phosphor screen formed on an inner surface of a panel. The shadow mask has a mask body and a mask frame to which a peripheral portion of the mask body is attached. The shadow mask has a rectangular form having a center through which a tube axis passes, and a long axis and a short axis passing through the center and perpendicular to each other. The mask frame has a pair of long side walls extending parallel to the long axis and a pair of short side walls extending parallel to the short axis. The height of each long side wall at a central portion along the tube axis is lower than the height of each short side wall at a central portion along the tube axis.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: July 31, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Munechika Tani, Takashi Murai, Masatsugu Inoue
  • Patent number: 6215237
    Abstract: A shadow mask is provided in an envelope of a color cathode ray tube. The shadow mask includes a mask body having a number of electron beam apertures, and a mask frame having side walls equipped on the peripheral portion of the mask body. The side walls of the mask frame includes a pair of long side walls extending in parallel with the long axis X and a pair of short side walls extending in parallel with the short axis Y. Beads and are respectively formed on the long side walls and the short side walls. The length of each bead of the long side wall along the long axis is set in a range of 55% to 80% of the length of the long side walls along the long axis, and a width of the bead in the tube axis direction is set in a rage of 40% to 75% of the maximum width of the long side walls in the tube axis direction.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: April 10, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigeru Tsuchida, Takashi Murai
  • Patent number: 6203205
    Abstract: A cylindrical roller bearing comprises an inner race, an outer race, a plurality of cylindrical rollers disposed between the inner race and the outer race, and a cage disposed between the inner race and the outer race and provided with pocket portions in which the plurality of cylindrical rollers are respectively accommodated. The cylindrical roller bearing satisfies a following relations 1.5×10−3D≦H≦9.0×10−3D and A/B=0.6˜1.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: March 20, 2001
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Takashi Yamamoto, Shinichi Tsunashima
  • Patent number: 6196724
    Abstract: At least the center portion of the contour of a rolling surface of each roller along the direction of an axis is linearly shaped in parallel with the axis, and each of the inclinations of the surface on a pillar side of a pocket of a cage for receiving rollers with respect to the circumferential and radial directions is set to be equal to or less than {fraction (1.5/1000)} as large as the length of the roller.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: March 6, 2001
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Morio Sorimachi, Yoshio Shoda, Takashi Yamamoto
  • Patent number: 6133682
    Abstract: A shadow mask opposed to a phosphor screen has a substantially rectangular effective surface (30) where slit-like apertures are formed. The apertures are disposed so as to constitute a plurality of aperture rows which extend in parallel with the short axis of the effective surface and are disposed in the long axis of the effective surface. Each of the aperture rows includes a plurality of aperture, and bridges (38) positioned between any adjacent pair of the apertures. The width B of the bridges in the lengthwise direction of the aperture rows, positioned an intermediate between the short axis of the effective surface and a short side edge thereof is greater than that of the bridges positioned at a peripheral portion of the effective surface.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: October 17, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Murai, Ichiro Saotome, Munechika Tani
  • Patent number: 6112321
    Abstract: A nonvolatile semiconductor storage device includes a repair request global flag for storing information indicating whether any faulty memory cell has been detected in the repair judgment test; and two tag memories, one for storing information indicating the word line associated with a faulty memory cell detected in the repair judgment test, the other tag memory storing bit line information associated with the detected faulty memory cell. A write state machine controls the data written to the repair request global flag and tag memories, and a write state machine algorithm storage section stores algorithms for which the write state machine executes a writing operation to the repair request global flag and tag memories.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: August 29, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuyuki Shimada, Takashi Murai
  • Patent number: 6068408
    Abstract: In a rolling bearing including an inner race; an outer race; a plurality of rolling elements rollingly arranged between the inner race and the outer race; and a cage holding the rolling elements, the cage has an annular shape and a plurality of pockets which are formed at plural positions in a circumferential direction of the cage, in which each of the pockets has an opening peripheral portion which is curved to a direction of increasing a distance from a center of the rolling elements. The opening peripheral portion forms a chamfered face or a convex face. The rolling bearing can sufficiently ensure the lubrication of sliding contact portions between the cage and rolling elements so that vibrations and noises of the rolling bearing are lowered.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: May 30, 2000
    Assignee: NSK Ltd.
    Inventors: Yasushi Mutoh, Setsu Kawaguchi, Eiichi Takahashi, Kenji Okuma, Magozou Hamamoto, Hideki Koizumi, Tatsunobu Momono, Toshihisa Ohata, Takashi Murai, Banda Noda
  • Patent number: 6022147
    Abstract: A roller bearing with a cage comprises an inner race and an outer race concentric with each other, a plurality of rollers interposed between the inner race and the outer race, and a cage for retaining these rollers. The cage comprises a pair of annular side plates disposed at the both ends of each of the rollers for supporting the rollers to be rotatable, and a plurality of pins each having its both ends respectively connected to connection portions of the pair of annular side plates. The parallel screw portions are respectively formed at the both ends of each of the pins and large-diameter portions each having a larger diameter than the parallel screw portions are respectively formed on the inner sides of the parallel screw portions on the both sides thereof. The circular recesses in which the large-diameter portions are respectively fitted are respectively formed on the inner sides of the pin connection portions of the pair of annular side plates.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: February 8, 2000
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Osamu Fujii, Michitsugu Mori
  • Patent number: 5821684
    Abstract: A color cathode ray tube has a substantially rectangular shadow mask in which a plurality of slit type aperture arrays are aligned in the direction of the major axis of an effective region defined by a curved surface opposing a phosphor screen formed on the inner surface, defined by a concave curved surface, of the effective region of a panel. Each slit type aperture array is obtained by arranging a plurality of slit type apertures in an array in the direction of the minor axis of the effective region of the shadow mask. In this color cathode ray tube, the difference between the array interval of the slit type aperture arrays at a peripheral portion on the long side of the shadow mask and the array interval of the slit type aperture arrays on the major axis is a maximum value within a distance range of 0.4 h to 0.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: October 13, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Murai, Masatsugu Inoue, Nobuhiko Akoh, Kumio Fukuda
  • Patent number: 5716146
    Abstract: In order to reduce the sound pressure levels of abnormal sound called "squeal" and the sound of the cage that are produced during the operation of radial rolling bearings, the radial rolling bearing according to the present invention satisfies the following relations: 1.5.times.10.sup.-3 D.ltoreq.H.ltoreq.9.0.times.10.sup.-3 D and A/B=0.6-1.0, where D=diameter of the outer peripheral surface of cage 5a; H=thickness of annular gap 9 between the inner peripheral surface of flange 10 formed at an end portion of outer race 2a and the mating outer peripheral surface of the cage 5a; A=axial length of the outer peripheral surface of an end portion of the cage 5a; B=axial length of the mating inner peripheral surface of the flange 10.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: February 10, 1998
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Tatsunobu Momono
  • Patent number: 5672934
    Abstract: A color-cathode ray tube having a shadow mask with improved aperture arrays. The aperture arrays are spaced at appropriate intervals and are curved to suppress local doming of the effective part of the shadow mask and to prevent electron-beam mislanding from occurring on a phosphor screen. The distance between any two adjacent apertures is expressed as: PH(N)=A+BN.sup.2 +CN.sup.4, where PH(N) is the distance between the (N-1)th and Nth arrays and A, B, and C are fourth-degree functions of a Y-coordinate. The apertures along a long side of the effective part of the shadow mask in a section extending for one-fourth of a width of the effective part of the shadow mask from a short side of the effective part of the shadow mask are inclined in an opposite direction to the apertures within the section and located one-third of a height of the effective part of the shadow mask from the long side.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: September 30, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinji Ohama, Norio Shimizu, Takashi Murai, Ichiro Saotome, Masatsugu Inoue, Kumio Fukuda
  • Patent number: 5663610
    Abstract: When an outer surface of an effective portion 20 of a panel 20 is substantially spherical, a diagonal axis of the effective portion, a long axial effective diameter, land a short axial effective diameter are Sd, Sh, and Sv, the panel is shaped to satisfy the relationship, Dp/Sd<0.05, V<H<D, 2V<Dp<2H where Dp an amount of drop at an end of the effective diameter of the diagonal axis, H an amount of drop at the end of the effective diameter of the long axis, V an amount of drop at the end of the effective diameter of the short axis, the relationship, Ah/Sh<A/Sv where Ah a distance in the long axial direction of a thicker region on the long axis and Av a distance in the short axial direction of the thicker region on the short axis, wherein, in the thicker region, the panel has a thickness larger than the average thickness Ta of the effective portion, and the relationship between a maximum thickness T max and a minimum T min, (Tmax-Ta)>(Ta-Tmin) or .vertline.T max-Ta.vertline.>.vertline.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 2, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masatsugu Inoue, Satoshi Tsunokawa, Takashi Murai, Norio Shimizu
  • Patent number: 5631520
    Abstract: A shadow mask of a color cathode-ray tube includes a mask body in the form of a substantially rectangular curved surface. The mask body has a center, horizontal and vertical axes perpendicularly crossing each other at the center, long sides extending in parallel to the horizontal axis, and short sides extending in parallel to the vertical axis. In a region of the mask body which is adjacent to the vertical axis, the radius of curvature in the vertical direction is smaller at portions of the mask body which are near the long sides than at the central portion of the mask body. In a intermediate region of the mask body between the vertical axis and each short side, the radius of curvature in the vertical direction is larger at the portions of the mask body which are near the long sides than at a portion adjacent to the horizontal axis.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: May 20, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masatsugu Inoue, Takashi Murai
  • Patent number: 5408123
    Abstract: A functional chip and a stack structure of such functional chips that enables high mounting density to be readily achieved. The functional chip has a functional element, such as a semiconductor element including an integrated circuit on a substrate, first and second insulating films respectively on first and second opposed surfaces of the functional element, and first and second magnetic films respectively on the first and second insulating films. The first and second magnetic films are divided into regions and magnetized such as to have magnetic poles arranged in a prescribed pattern. A plurality of such functional chips are stacked on each other to form the stack structure. Among the functional chips in the stack structure, adjacent functional chips are stacked on each other in such a manner that the first magnetic film of one of the pair of functional chips is held to the second magnetic film of the other functional chip by magnetic force.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: April 18, 1995
    Inventor: Takashi Murai
  • Patent number: 5397184
    Abstract: A hydrostatic gas bearing comprises a pair of bearing structural members 4 which make up an inner ring 3 and each have a frusto-conical engaging face 5 formed on the radially outer peripheral surface thereof, a pair of bearing members 2 which are fixed to the respective bearing structural members 4, and each formed with a radially inner engaging face 6 for engagement with the taper of the engaging face 5, and an outer bearing surface 10 which is aligned parallel to the inner engaging face 6, wherein since each bearing member 2 is pressed in an axial direction by an attachment member 7 and thereby fastened with a uniform pressing force to the bearing structural member 4, positional displacement of the bearing member 2 relative to the bearing structural member 4 and uneven deformation of the bearing member 2 can be suppressed so that bearing characteristics can be maintained in a simple structure.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: March 14, 1995
    Assignee: NSK, Ltd.
    Inventor: Takashi Murai
  • Patent number: 4990537
    Abstract: An antiviral agent which comprises a p-guanidinobenzoic acid derivative of the formula: ##STR1## wherein R is ##STR2## or its non-toxic salt as an active ingredient.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: February 5, 1991
    Assignee: Banyu Pharmaceutical Co., Ltd.
    Inventors: Akira Okuyama, Akira Someya, Takashi Murai, Nobuo Tanaka