Patents by Inventor Kenji Endo
Kenji Endo 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).
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Publication number: 20120258558Abstract: Provided is a semiconductor laser, wherein (?a??w) >15 (nm) and Lt<25 (?m), where ?w is the wavelength of light corresponding to the band gap of the active layer disposed at a position within a distance of 2 ?m from one end surface in a resonator direction, ?a is the wavelength of light corresponding to the band gap of the active layer disposed at a position that is spaced a distance of equal to or more than ( 3/10)L and ?( 7/10)L from the one end surface in a resonator direction, “L” is the resonator length, and “Lt” is the length of a transition region provided between the position of the active layer with a band gap corresponding to a light wavelength of ?w+2 (nm) and the position of the active layer with a band gap corresponding to a light wavelength of ?a?2 (nm) in the resonator direction.Type: ApplicationFiled: June 19, 2012Publication date: October 11, 2012Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Kentaro TADA, Kenji ENDO, Kazuo FUKAGAI, Tetsuro OKUDA, Masahide KOBAYASHI
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Patent number: 8228966Abstract: Provided is a semiconductor laser, wherein (?a??w)>15 (nm) and Lt<25 (?m), where ?w is the wavelength of light corresponding to the band gap of the active layer disposed at a position within a distance of 2 ?m from one end surface in a resonator direction, ?a is the wavelength of light corresponding to the band gap of the active layer disposed at a position that is spaced a distance of equal to or more than ( 3/10)L and <( 7/10)L from the one end surface in a resonator direction, “L” is the resonator length, and “Lt” is the length of a transition region provided between the position of the active layer with a band gap corresponding to a light wavelength of ?w+2 (nm) and the position of the active layer with a band gap corresponding to a light wavelength of ?a?2 (nm) in the resonator direction.Type: GrantFiled: February 23, 2010Date of Patent: July 24, 2012Assignee: Renesas Electronics CorporationInventors: Kentaro Tada, Kenji Endo, Kazuo Fukagai, Tetsuro Okuda, Masahide Kobayashi
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Patent number: 8013794Abstract: A surface mount antenna with small size and broadband is provided. The surface mount antenna includes: a substrate including a dielectric material or a magnetic material as a main material; a feed radiation conductor formed on the substrate, one end of the feed radiation conductor being a first feed end to be supplied with power, and the other end being a first open end; and a parasitic radiation conductor formed on the substrate at a distance from the feed radiation conductor, one end of the parasitic radiation conductor being a second feed end to be supplied with power from the feed radiation conductor through electromagnetic coupling, and the other end being a second open end. A region having a dielectric constant or a magnetic permeability lower than that of the main material of the substrate is provided between the feed radiation conductor and the parasitic radiation conductor.Type: GrantFiled: December 29, 2008Date of Patent: September 6, 2011Assignee: TDK CorporationInventors: Naoki Sotoma, Yasumasa Harihara, Kenji Endo, Takeshi Oohashi
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Patent number: 7923883Abstract: The present invention provides a stator coiled in a spiral, capable of mechanically inserting a wound coil in the slot of a stator core. In a stator in which coils are overlapped in a spiral when viewed from the end surface of the stator core after each of one sides of a plurality of coils wound in advance is inserted in the slot of the stator core and each of the other sides of the plurality of coils is inserted in a different slot, by repeating the inserting operation twice or more, the loop of the coils overlapped in a spiral are piled in two layers or more in the radius direction of the stator core and the total coil sectional area inserted in the slots of the stator core is larger than a prescribed value based on the inside radius of the stator core.Type: GrantFiled: April 23, 2008Date of Patent: April 12, 2011Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Kazuyuki Yamaguchi, Kenji Endo, Yoshio Kato
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Publication number: 20110025158Abstract: In a rotating electrical machine, when a stator winding is wound in concentrated winding, an improvement in performance is achieved by reducing a magnetomotive force harmonic without reducing a fundamental wave magnetic flux generated by a stator. A rotating electrical machine (10) includes a rotor (18), and two stators (14, 16) opposed with the rotor (18) being interposed therebetween either on both sides of the rotor (18) in the axial direction or on both sides of the rotor (18) in the radial direction. Stator windings (22) provided in a plurality of portions in the circumferential direction of each stator (14, 16) are wound in concentrated winding. The directions of magnetic fluxes generated by stator windings (22) having the same phase in the stators (14, 16) are in mutually opposite directions with respect to either the axial direction or the radial direction.Type: ApplicationFiled: March 12, 2009Publication date: February 3, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kosuke Aiki, Hideo Nakai, Takaji Umeno, Eiji Yamada, Kazutaka Tatematsu, Norimoto Minoshima, Toshihiko Yoshida, Tatsuya Uematsu, Kenji Endo
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Publication number: 20100220759Abstract: Provided is a semiconductor laser, wherein (?a??w)>15 (nm) and Lt<25 (?m), where ?w is the wavelength of light corresponding to the band gap of the active layer disposed at a position within a distance of 2 ?m from one end surface in a resonator direction, ?a is the wavelength of light corresponding to the band gap of the active layer disposed at a position that is spaced a distance of equal to or more than ( 3/10)L and <( 7/10)L from the one end surface in a resonator direction, “L” is the resonator length, and “Lt” is the length of a transition region provided between the position of the active layer with a band gap corresponding to a light wavelength of ?w+2 (nm) and the position of the active layer with a band gap corresponding to a light wavelength of ?a?2 (nm) in the resonator direction.Type: ApplicationFiled: February 23, 2010Publication date: September 2, 2010Applicant: NEC ELECTRONICS CORPORATIONInventors: Kentaro TADA, Kenji ENDO, Kazuo FUKAGAI, Tetsuro OKUDA, Masahide KOBAYASHI
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Publication number: 20090179815Abstract: A surface mount antenna with small size and broadband is provided. The surface mount antenna includes: a substrate including a dielectric material or a magnetic material as a main material; a feed radiation conductor formed on the substrate, one end of the feed radiation conductor being a first feed end to be supplied with power, and the other end being a first open end; and a parasitic radiation conductor formed on the substrate at a distance from the feed radiation conductor, one end of the parasitic radiation conductor being a second feed end to be supplied with power from the feed radiation conductor through electromagnetic coupling, and the other end being a second open end. A region having a dielectric constant or a magnetic permeability lower than that of the main material of the substrate is provided between the feed radiation conductor and the parasitic radiation conductor.Type: ApplicationFiled: December 29, 2008Publication date: July 16, 2009Applicant: TDK CORPORATIONInventors: Naoki Sotoma, Yasumasa Harihara, Kenji Endo, Takeshi Oohashi
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Publication number: 20080258570Abstract: The present invention provides a stator coiled in a spiral, capable of mechanically inserting a wound coil in the slot of a stator core. In a stator in which coils are overlapped in a spiral when viewed from the end surface of the stator core after each of one sides of a plurality of coils wound in advance is inserted in the slot of the stator core and each of the other sides of the plurality of coils is inserted in a different slot, by repeating the inserting operation twice or more, the loop of the coils overlapped in a spiral are piled in two layers or more in the radius direction of the stator core and the total coil sectional area inserted in the slots of the stator core is larger than a prescribed value based on the inside radius of the stator core.Type: ApplicationFiled: April 23, 2008Publication date: October 23, 2008Applicants: KABUSHIKI KAISHA TOYOTA CORPORATION, SANKO KIKI CO., LTD.Inventors: Kazuyuki Yamaguchi, Kenji Endo, Yoshio Kato
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Patent number: 7255572Abstract: A connector is adapted to be mounted on a board member. An insulative holder is formed with a through hole connecting a first side face and a second side face which is adapted to be opposed to the board member. The insulative holder accommodates a coiled spring in the through hole such that a first portion of the coiled spring is retractably projected from the first side face. A conductive plate member is attached to the holder. A first part of the plate member is disposed on the second side face of the holder such that a second portion of the coiled spring which is disposed within the through hole is brought into contact therewith. A second part of the plate member is disposed on the second side face separately from the first part, and adapted to receive solder for electrically connecting the coiled spring to a connection electrode provided on the board member.Type: GrantFiled: August 31, 2005Date of Patent: August 14, 2007Assignee: Yokowo Co., Ltd.Inventor: Kenji Endo
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Publication number: 20070049063Abstract: A connector is adapted to be mounted on a board member. An insulative holder is formed with a through hole connecting a first side face and a second side face which is adapted to be opposed to the board member. The insulative holder accommodates a coiled spring in the through hole such that a first portion of the coiled spring is retractably projected from the first side face. A conductive plate member is attached to the holder. A first part of the plate member is disposed on the second side face of the holder such that a second portion of the coiled spring which is disposed within the through hole is brought into contact therewith. A second part of the plate member is disposed on the second side face separately from the first part, and adapted to receive solder for electrically connecting the coiled spring to a connection electrode provided on the board member.Type: ApplicationFiled: August 31, 2005Publication date: March 1, 2007Inventor: Kenji Endo
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Publication number: 20050231926Abstract: A wiring board includes an insulating inorganic base, a conductor pattern provided on the base and including silver, a nickel oxide layer provided on the conductor pattern and covering the conductor pattern, and an insulating layer provided on the nickel oxide layer. The conductor pattern includes 5 wt % to 12 wt % of phosphorus. This wiring board is prevented from having migration at the conductor pattern, thus being prevented insulation failure at the conductor pattern.Type: ApplicationFiled: April 12, 2005Publication date: October 20, 2005Inventors: Hideyuki Ito, Kenji Endo
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Publication number: 20050156474Abstract: A rotating machine is comprised of a rotor having permanent magnets and a stator disposed around the rotor. At least a surface of the permanent magnet, which faces the stator, is covered with a magnetic material whose thickness is determined on the basis of an electrical conductivity of the magnetic material, a magnetic permeability of the magnetic material and a frequency of a high-frequency magnetic flux act from the stator on the rotor.Type: ApplicationFiled: January 10, 2005Publication date: July 21, 2005Inventor: Kenji Endo
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Patent number: 6847666Abstract: A self-sustained pulsating laser diode in which a region in an active layer functions as a saturable absorber has at least five and no more than ten quantum wells, p-type cladding layer flat part with a layer thickness of at least 300 nm and no greater than 500 nm, and a p-type cladding layer flat part with a carrier density of at least 1×1017 cm?3 and no greater than 5×1017 cm?3. This laser diode achieves a sufficiently small current distribution compared with the light distribution in the lateral direction, thereby enabling stable self-sustained pulsating operation up to a high temperature, which was difficult to achieve in the past.Type: GrantFiled: March 28, 2001Date of Patent: January 25, 2005Assignee: NEC CorporationInventors: Masaki Ohya, Hiroaki Fujii, Kenji Endo
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Patent number: 6666690Abstract: A coil spring contact connector (C) includes a plurality of coil spring contacts (1) and an insulating holder (2) holding the coil spring contacts arranged at intervals. Each coil spring contact has a pair of end contact coils (10) to be brought into contact with a terminal electrode (6c), and middle contact coils (12) radially offset relative to the end contact coils (10) so as to be brought into contact with another terminal electrode (5c). The holder is provided with openings through which contact parts of the end and the middle contact coils project outside, respectively, restrains each coil spring contact (1) from axial deformation and axial movement, and allows each coil spring contact (1) to be deformed in an offset direction thereof.Type: GrantFiled: September 23, 2002Date of Patent: December 23, 2003Assignee: Yokowo Co., Ltd.Inventors: Shinichi Ishizuka, Kenji Endo
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Patent number: 6570473Abstract: A band pass filter is constituted of a dielectric block 2 having through holes 5 formed from one surface to the opposite surface and a single layered dielectric plate 3 joined to the dielectric block 2 such that the back surface thereof faces the one surface of the dielectric block 2.Type: GrantFiled: August 27, 2001Date of Patent: May 27, 2003Assignee: TKD CorporationInventors: Kenji Endo, Osamu Takubo
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Patent number: 6556386Abstract: An actuator assembly including a head actuator, a read/write FPC band, and a relay FPC. The head actuator includes an actuator arm with both a recessed step and a non-recessed surface on a mounting side thereof. The read/write FPC band has an end portion thereof disposed within the recessed step, such that the outer surface of the end portion of the read/write FPC band is aligned with the non-recessed surface. The relay FPC is attached to the non-recessed surface of the actuator arm, such that a connection area of the relay FPC is superposed upon a connection area of the read/write FPC band. Preferably, the connection area of the relay FPC and an area of said relay FPC attached to the non-recessed surface lie along a single plane. Such an arrangement eliminates a step or bend near the connection area of the relay FPC, allowing for simplified positioning of the relay FPC, as well as improved positioning accuracy.Type: GrantFiled: August 18, 2000Date of Patent: April 29, 2003Assignee: Fujitsu LimitedInventor: Kenji Endo
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Patent number: 6543761Abstract: A sheet feeding device for an image forming apparatus includes a plurality of separator pads each having a particular coefficient of friction with respect to sheets for separating the sheets one by one. An automatic switching mechanism automatically replaces the separator pads. The automatic switching mechanism includes a pad pressure switching section, a pad angle switching section, a ball screw with a worm wheel mounted thereon, a ball nut meshing with the ball screw, a worm meshing with the worm wheel for moving a movable member in the widthwise direction of the sheets via the ball screw, a pad motor for causing the worm to rotate, and a sensor responsive to the position of the movable member. The device automatically selects one of the separator pads and an angle thereof in order to set up optimal sheet feed conditions matching with environmental conditions including temperature and humidity.Type: GrantFiled: November 19, 2001Date of Patent: April 8, 2003Assignee: Tohoku Ricoh Co., Ltd.Inventor: Kenji Endo
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Publication number: 20030040201Abstract: A coil spring contact connector (C) includes a plurality of coil spring contacts (1) and an insulating holder (2) holding the coil spring contacts arranged at intervals. Each coil spring contact has a pair of end contact coils (10) to be brought into contact with a terminal electrode (6c), and middle contact coils (12) radially offset relative to the end contact coils (10) so as to be brought into contact with another terminal electrode (5c). The holder is provided with openings through which contact parts of the end and the middle contact coils project outside, respectively, restrains each coil spring contact (1) from axial deformation and axial movement, and allows each coil spring contact (1) to be deformed in an offset direction thereof.Type: ApplicationFiled: September 23, 2002Publication date: February 27, 2003Inventors: Shinichi Ishizuka, Kenji Endo
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Patent number: 6508465Abstract: A sheet feeding apparatus for image processing systems such as a stencil duplicating machine or a copying machine comprises a sheet feeding time sensor, and a control unit. The control unit compares a sheet feeding time detected by the sheet feeding time sensor with a predetermined reference sheet feeding time, and controls a revolution speed of a sheet feeding roller during or after a sheet feeding operation.Type: GrantFiled: September 9, 1997Date of Patent: January 21, 2003Assignee: Tohoku Ricoh Co., Ltd.Inventor: Kenji Endo
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Publication number: 20020060397Abstract: A sheet feeding device for an image forming apparatus includes a plurality of separator pads each having a particular coefficient of friction with respect to sheets for separating the sheets one by one. An automatic switching mechanism automatically replaces the separator pads. The automatic switching mechanism includes a pad pressure switching section, a pad angle switching section, a ball screw with a worm wheel mounted thereon, a ball nut meshing with the ball screw, a worm meshing with the worm wheel for moving a movable member in the widthwise direction of the sheets via the ball screw, a pad motor for causing the worm to rotate, and a sensor responsive to the position of the movable member. The device automatically selects one of the separator pads and an angle thereof in order to set up optimal sheet feed conditions matching with environmental conditions including temperature and humidity.Type: ApplicationFiled: November 19, 2001Publication date: May 23, 2002Inventor: Kenji Endo