Patents by Inventor Eiichi Sakai

Eiichi Sakai 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: 8554423
    Abstract: An automatic transmission device for a wheel loader includes: a shift mechanism; a work detection device that detects that the wheel loader is performing an excavation work; and a shift control device that executes control so as to downshift a speed stage at the shift mechanism if the work detection device detects that the wheel loader is performing the excavation work.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: October 8, 2013
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tetsuji Tanaka, Masami Higaki, Hirofumi Ouchi, Eiichi Sakai
  • Patent number: 8423247
    Abstract: A speed change control system for industrial vehicle, includes: a speed ratio detecting unit that detects a speed ratio of speeds of an input shaft and of an output shaft of a torque converter; speed changer for operating based on the torque converter speed ratio that shifts up or down a speed stage of a transmission in response to the detected speed ratio; a braking detection unit that detects an operation of a braking device for traveling; and a downshift limit unit that permits a downshift to a 1st speed by the speed changer when a non-operation of the braking device is detected by the braking detection unit and limits a lowest speed stage upon downshift by the speed changer to a 2nd speed when an operation of the braking device is detected.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: April 16, 2013
    Assignee: Hitachi Construction Machinery, Co., Ltd.
    Inventors: Koji Hyodo, Tetsuji Tanaka, Eiichi Sakai
  • Patent number: 8380408
    Abstract: A speed change control system for an industrial vehicle includes: a speed ratio detecting unit that detects a speed ratio of speeds of an input shaft and of an output shaft of a torque converter; a torque converter speed ratio-based speed changer that shifts up or shifts down a speed stage of a transmission 3 in response to the detected speed ratio; a vehicle speed detection unit that detects a speed of the vehicle; a mode selection unit that selects any one of an L-mode and an H-mode; and a speed change control unit that permits an upshift provided that the vehicle speed is equal to or higher than a first predetermined value when the L-mode is selected whereas permits the upshift provided that the vehicle speed is higher than another predetermined value which is larger that the predetermined value when the H-mode is selected.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: February 19, 2013
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji Hyodo, Tetsuji Tanaka, Eiichi Sakai, Nobuhiro Suzuki, Koji Takano
  • Patent number: 8290670
    Abstract: A clutch control device includes: a plurality of hydraulic clutches built into a transmission; a clutch switching pattern storage device in which a plurality of clutch switching patterns, each defining engage/release changeover timing with which the plurality of hydraulic clutches are engaged/released are stored in correspondence to individual speed change patterns adopted by the transmission; a clutch switching pattern selection device that selects a clutch switching pattern stored in the clutch switching pattern storage device in correspondence to a speed change pattern for the transmission at a time of speed change; and a hydraulic control device that executes hydraulic control for the plurality of hydraulic clutches in correspondence to the clutch switching pattern selected by the clutch switching pattern selection device.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: October 16, 2012
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tetsuji Tanaka, Masami Higaki, Hideo Nakayama, Eiichi Sakai, Hidenobu Tsukada
  • Patent number: 8262540
    Abstract: A shift control device for a work vehicle that has a stepped automatic transmission includes: a control device that controls an engine rotation rate at the work vehicle and the stepped automatic transmission; a forward/reverse switchover member that outputs a forward/reverse switchover command for the work vehicle; and an operation quantity detection device that detects an accelerator pedal operation quantity in the work vehicle is operated. As the forward/reverse switchover command is output via the forward/reverse switchover member, the control device executes forward/reverse switchover control for the stepped automatic transmission and also controls the engine rotation rate so as to decrease the engine rotation rate gradually to a target lower limit value selected to ensure that a reverse rotation of a turbine runner at a torque converter in the work vehicle does not occur.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: September 11, 2012
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Masami Higaki, Tetsuji Tanaka, Hideo Nakayama, Eiichi Sakai, Hidenobu Tsukada
  • Patent number: 8236468
    Abstract: In the present invention, an objective is to provide an organic photoreceptor exhibiting extremely high moire resistance, but also to provide an organic photoreceptor capable of acquiring a high quality image to realize no generation of image defects such as black spots or the like. Also disclosed is an organic photoreceptor possessing a conductive support and layered thereon, an intermediate layer, a charge generation layer and a charge transport layer in this order, wherein the intermediate layer possesses porous silica in which metal oxide is encapsulated.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: August 7, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Eiichi Sakai
  • Patent number: 8194032
    Abstract: An image display medium is disclosed, which medium includes a pair of substrates each having an electrode and colored particles between the pair of substrates, and the colored particles have an absolute electric charge of 0.5 to 4.0 ?C/g.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: June 5, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Shigeki Takenouchi, Eiichi Sakai, Tatsuya Nagase, Okushi Okuyama, Yukio Hosoya
  • Patent number: 8137238
    Abstract: A gearshift controller for an industrial vehicle, includes: a speed ratio detection unit that detects a speed ratio of speeds of an input axis and of an output axis of a torque converter; a gearshift control unit that shifts up a speed stage when the detected speed ratio is equal to or more than a first predetermined value and shifts down the speed stage when the detected speed ratio is equal to or less than a second predetermined value, which is smaller than the first predetermined value; and an operation member with which a downshift to the first speed is instructed by operation thereof by an operator. When the downshift is instructed by the operation member, the gearshift control unit controls the speed stage to be kept at the first speed for a predetermined time period regardless of the speed ratio detected by the speed ratio detection unit.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: March 20, 2012
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji Hyodo, Tetsuji Tanaka, Eiichi Sakai, Genichiro Ishimaru, Tomoo Takahashi, Yasuo Yamazaki
  • Patent number: 8029955
    Abstract: Provide is an electrophotographic photoreceptor exhibiting excellent evenness of halftone images together with fine line reproduction, and an image forming method thereof, as to a photoreceptor in which an oxytitanium phthalocyanine pigment having a maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction. Also disclosed is an electrophotographic photoreceptor possessing a body having cylindrical conductive support provided thereon photosensitive layer containing oxytitanium phthalocyanine pigment having maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction, and flanges jointed at both ends of the body, wherein at least one of flanges is fitted with driving shaft having drive hole having at least 3 sides, and a ratio B/A of cross-sectional area B of engaging part of rotation shaft to rotate the electrophotographic photoreceptor with respect to cross-sectional area A of the drive hole is 0.890-0.998.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: October 4, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Eiichi Sakai, Yoshihiko Eto, Kimiyuki Itou, Akihiko Itami, Takeo Oshiba
  • Patent number: 7839562
    Abstract: Disclosed are white particles for an image display device which includes: (i) a pair of substrates facing each other, provided that at least one of the substrates is transparent; and (ii) the white particles enclosed in a gap between the substrates, with which an image is displayed through migration of the white particles by generating an electric field between the substrates, wherein each of the white particles contains: (a) a core particles containing an inorganic oxide having a refractive index of 2.0 or more in an amount of 80 to 99 weight % based on the total weight of the core particle; and (b) a resin layer having a thickness of 10 to 1000 nm on a surface of the core particle.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: November 23, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yukio Hosoya, Eiichi Sakai, Shigeki Takenouchi, Tatsuya Nagase, Okushi Okuyama
  • Patent number: 7813031
    Abstract: An image display device comprising: (i) a pair of substrates facing each other; and (ii) particles placed in a gap between the substrates, wherein at least one of the substrates is a resin substrate which is transparent and exhibits a light transmittance of 50% or more at a wavelength of 300 nm.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: October 12, 2010
    Assignee: Konica Minolta Business Echnologies, Inc.
    Inventors: Tatsuya Nagase, Eiichi Sakai, Shigeki Takenouchi, Okushi Okuyama, Yukio Hosoya
  • Publication number: 20100098458
    Abstract: In the present invention, an objective is to provide an organic photoreceptor exhibiting extremely high moire resistance, but also to provide an organic photoreceptor capable of acquiring a high quality image to realize no generation of image defects such as black spots or the like. Also disclosed is an organic photoreceptor possessing a conductive support and layered thereon, an intermediate layer, a charge generation layer and a charge transport layer in this order, wherein the intermediate layer possesses porous silica in which metal oxide is encapsulated.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 22, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventor: Eiichi SAKAI
  • Patent number: 7692846
    Abstract: Disclosed is an image display device comprising: (i) a pair of substrates facing each other, provided that one of the substrates is transparent; and (ii) charged particles placed in a gap between the substrates, wherein each of the substrates has a layer containing a compound having a silicone structure in the molecule on a surface of the substrates faced with another electrode.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: April 6, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Okushi Okuyama, Eiichi Sakai, Shigeki Takenouchi, Tatsuya Nagase, Yukio Hosoya
  • Publication number: 20100071987
    Abstract: A speed change control system for an industrial vehicle includes: a speed ratio detecting unit that detects a speed ratio of speeds of an input shaft and of an output shaft of a torque converter; a torque converter speed ratio-based speed changer that shifts up or shifts down a speed stage of a transmission 3 in response to the detected speed ratio; a vehicle speed detection unit that detects a speed of the vehicle; a mode selection unit that selects any one of an L-mode and an H-mode; and a speed change control unit that permits an upshift provided that the vehicle speed is equal to or higher than a first predetermined value when the L-mode is selected whereas permits the upshift provided that the vehicle speed is higher than another predetermined value which is larger that the predetermined value when the H-mode is selected.
    Type: Application
    Filed: November 30, 2007
    Publication date: March 25, 2010
    Applicants: Hitachi Construction Machinery Co., Ltd., TCM Corporation
    Inventors: Koji Hyodo, Tetsuji Tanaka, Eiichi Sakai, Nobuhiro Suzuki, Koji Takano
  • Publication number: 20100076652
    Abstract: A speed change control system for industrial vehicle, includes: a speed ratio detecting unit that detects a speed ratio of speeds of an input shaft and of an output shaft of a torque converter; speed changer for operating based on the torque converter speed ratio that shifts up or down a speed stage of a transmission in response to the detected speed ratio; a braking detection unit that detects an operation of a braking device for traveling; and a downshift limit unit that permits a downshift to a 1st speed by the speed changer when a non-operation of the braking device is detected by the braking detection unit and limits a lowest speed stage upon downshift by the speed changer to a 2nd speed when an operation of the braking device is detected.
    Type: Application
    Filed: November 30, 2007
    Publication date: March 25, 2010
    Applicants: Hitachi Construction Machinery Co., Ltd, TCM Corporation
    Inventors: Koji Hyodo, Tetsuji Tanaka, Eiichi Sakai
  • Publication number: 20100069199
    Abstract: A gearshift controller for an industrial vehicle, includes: a speed ratio detection unit that detects a speed ratio of speeds of an input axis and of an output axis of a torque converter; a gearshift control unit that shifts up a speed stage when the detected speed ratio is equal to or more than a first predetermined value and shifts down the speed stage when the detected speed ratio is equal to or less than a second predetermined value, which is smaller than the first predetermined value; and an operation member with which a downshift to the first speed is instructed by operation thereof by an operator. When the downshift is instructed by the operation member, the gearshift control unit controls the speed stage to be kept at the first speed for a predetermined time period regardless of the speed ratio detected by the speed ratio detection unit.
    Type: Application
    Filed: November 30, 2007
    Publication date: March 18, 2010
    Applicants: TCM Corporation, Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji Hyodo, Tetsuji Tanaka, Eiichi Sakai, Genichiro Ishimaru, Tomoo Takahashi, Yasuo Yamazaki
  • Publication number: 20100017076
    Abstract: An automatic transmission device for a wheel loader includes: a shift mechanism; a work detection device that detects that the wheel loader is performing an excavation work; and a shift control device that executes control so as to downshift a speed stage at the shift mechanism if the work detection device detects that the wheel loader is performing the excavation work.
    Type: Application
    Filed: June 1, 2006
    Publication date: January 21, 2010
    Applicants: TCM Corporation, Hitachi Construction Machinery Co., Ltd
    Inventors: Tetsuji Tanaka, Masami Higaki, Hirofumi Ouchi, Eiichi Sakai
  • Publication number: 20090312922
    Abstract: A clutch control device includes: a plurality of hydraulic clutches built into a transmission; a clutch switching pattern storage device in which a plurality of clutch switching patterns, each defining engage/release changeover timing with which the plurality of hydraulic clutches are engaged/released are stored in correspondence to individual speed change patterns adopted by the transmission; a clutch switching pattern selection device that selects a clutch switching pattern stored in the clutch switching pattern storage device in correspondence to a speed change pattern for the transmission at a time of speed change; and a hydraulic control device that executes hydraulic control for the plurality of hydraulic clutches in correspondence to the clutch switching pattern selected by the clutch switching pattern selection device.
    Type: Application
    Filed: April 26, 2006
    Publication date: December 17, 2009
    Applicants: TCM Corporation, Hitachi Construction Machinery Co., Ltd
    Inventors: Tetsuji Tanaka, Masami Higaki, Hideo Nakayama, Eiichi Sakai, Hidenobu Tsukada
  • Publication number: 20090197195
    Abstract: Provide is an electrophotographic photoreceptor exhibiting excellent evenness of halftone images together with fine line reproduction, and an image forming method thereof, as to a photoreceptor in which an oxytitanium phthalocyanine pigment having a maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction. Also disclosed is an electrophotographic photoreceptor possessing a body having cylindrical conductive support provided thereon photosensitive layer containing oxytitanium phthalocyanine pigment having maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction, and flanges jointed at both ends of the body, wherein at least one of flanges is fitted with driving shaft having drive hole having at least 3 sides, and a ratio B/A of cross-sectional area B of engaging part of rotation shaft to rotate the electrophotographic photoreceptor with respect to cross-sectional area A of the drive hole is 0.890-0.998.
    Type: Application
    Filed: January 29, 2009
    Publication date: August 6, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Eiichi SAKAI, Yoshihiko Eto, Kimiyuki Itou, Akihiko Itami, Takeo Oshiba
  • Publication number: 20090189851
    Abstract: An image display medium is disclosed, which medium includes a pair of substrates each having an electrode and colored particles between the pair of substrates, and the colored particles have an absolute electric charge of 0.5 to 4.0 ?C/g.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 30, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shigeki Takenouchi, Eiichi Sakai, Tatsuya Nagase, Okushi Okuyama, Yukio Hosoya