Patents by Inventor Akio Matsui

Akio Matsui 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: 8191808
    Abstract: A fluid spray nozzle for spraying fluid, satisfying a formula (r?r0)?L tan 35°, wherein r0 is a radius of a section having a minimum area of the nozzle when cut perpendicular to a spray direction of the fluid; and r is a radius of cross-sections of an upstream side and a downstream side of the spray direction from the section having a minimum area with a distance of L.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: June 5, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuya Tanaka, Masahiro Kawamoto, Akio Matsui, Hiroki Morioka, Kaoru Aoki
  • Publication number: 20110229814
    Abstract: A toner containing a mother toner particle containing a binder resin, a releasing agent, and a coloring agent and an external additive comprising an inorganic particulate, which is mixed with the mother toner particle in a mixing process by a mixer, wherein the external additive is isolated from the mother toner particle by ultrasonic vibration and collected, in an aqueous solution comprising a polyoxyethylene lauryl ether compound serving as a surface active agent, in an amount of from 0.1 ppm to 10 ppm/(toner 4 g/100 ml) as measured by atomic absorption spectrometry.
    Type: Application
    Filed: March 11, 2011
    Publication date: September 22, 2011
    Inventors: Masayuki KAKIMOTO, Akio MATSUI, Yoshikatsu MATSUDA, Masanori RIMOTO
  • Publication number: 20100072311
    Abstract: A fluid spray nozzle for spraying fluid, satisfying a formula (r?r0)?L tan 35°, wherein r0 is a radius of a section having a minimum area of the nozzle when cut perpendicular to a spray direction of the fluid; and r is a radius of cross-sections of an upstream side and a downstream side of the spray direction from the section having a minimum area with a distance of L.
    Type: Application
    Filed: September 25, 2009
    Publication date: March 25, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tetsuya TANAKA, Masahiro KAWAMOTO, Akio MATSUI, Hiroki MORIOKA, Kaoru AOKI
  • Patent number: 7185418
    Abstract: The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the stator and the rotary motor because the stacked stator core includes a plurality of stator cores 300, each of which is made up of a prescribed number of stacked sheet magnetic materials, a plurality of yoke members 301 forming each stator core, a bendable bent portion 304 provided between the yoke members, and an interconnecting portion 401 for connecting the plurality of stator cores 300 one another while providing a difference in level, by connecting the top end of one stator core with the bottom end of the other stator core.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: March 6, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuaki Miyake, Akio Matsui, Yuji Nakahara, Yasuyuki Nakanishi, Akira Hashimoto, Masaya Motohashi
  • Patent number: 6784587
    Abstract: The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the stator and the rotary motor because the stacked stator core includes a plurality of stator cores 300, each of which is made up of a prescribed number of stacked sheet magnetic materials, a plurality of yoke members 301 forming each stator core, a bendable bent portion 304 provided between the yoke members, and an interconnecting portion 401 for connecting the plurality of stator cores 300 one another while providing a difference in level, by connecting the top end of one stator core with the bottom end of the other stator core.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: August 31, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuaki Miyake, Akio Matsui, Yuji Nakahara, Yasuyuki Nakanishi, Akira Hashimoto, Masaya Motohashi
  • Patent number: 6759785
    Abstract: The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the stator and the rotary motor because the stacked stator core includes a plurality of stator cores 300, each of which is made up of a prescribed number of stacked sheet magnetic materials, a plurality of yoke members 301 forming each stator core, a bendable bent portion 304 provided between the yoke members, and an interconnecting portion 401 for connecting the plurality of stator cores 300 one another while providing a difference in level, by connecting the top end of one stator core with the bottom end of the other stator core.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: July 6, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuaki Miyake, Akio Matsui, Yuji Nakahara, Yasuyuki Nakanishi, Akira Hashimoto, Masaya Motohashi
  • Publication number: 20040061407
    Abstract: The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the stator and the rotary motor because the stacked stator core includes a plurality of stator cores 300, each of which is made up of a prescribed number of stacked sheet magnetic materials, a plurality of yoke members 301 forming each stator core, a bendable bent portion 304 provided between the yoke members, and an interconnecting portion 401 for connecting the plurality of stator cores 300 one another while providing a difference in level, by connecting the top end of one stator core with the bottom end of the other stator core.
    Type: Application
    Filed: September 30, 2003
    Publication date: April 1, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Nobuaki Miyake, Akio Matsui, Yuji Nakahara, Yasuyuki Nakanishi, Akira Hashimoto, Masaya Motohashi
  • Publication number: 20040061413
    Abstract: The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the stator and the rotary motor because the stacked stator core includes a plurality of stator cores 300, each of which is made up of a prescribed number of stacked sheet magnetic materials, a plurality of yoke members 301 forming each stator core, a bendable bent portion 304 provided between the yoke members, and an interconnecting portion 401 for connecting the plurality of stator cores 300 one another while providing a difference in level, by connecting the top end of one stator core with the bottom end of the other stator core.
    Type: Application
    Filed: September 30, 2003
    Publication date: April 1, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Nobuaki Miyake, Akio Matsui, Yuji Nakahara, Yasuyuki Nakanishi, Akira Hashimoto, Masaya Motohashi
  • Publication number: 20020163277
    Abstract: The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the stator and the rotary motor because the stacked stator core includes a plurality of stator cores 300, each of which is made up of a prescribed number of stacked sheet magnetic materials, a plurality of yoke members 301 forming each stator core, a bendable bent portion 304 provided between the yoke members, and an interconnecting portion 401 for connecting the plurality of stator cores 300 one another while providing a difference in level, by connecting the top end of one stator core with the bottom end of the other stator core.
    Type: Application
    Filed: April 29, 2002
    Publication date: November 7, 2002
    Inventors: Nobuaki Miyake, Akio Matsui, Yuji Nakahara, Yasuki Nakanishi, Akira Hashimoto, Masaya Motohashi
  • Patent number: 5870889
    Abstract: A mower unit includes a blade housing, and a guide plate for dividing a grass clipping flow space formed in the blade housing, along a flowing direction into a first flow space and a second flow space communicating with each other in a downstream position with respect to the flowing direction. The blade housing has a discharge section for discharging grass clippings cut by cutting blades, in a predetermined direction along with air flows. The discharge section has an intake opening for drawing ambient air into the second flow space. The guide plate may be displaceable relative to the blade housing to vary a sectional passage area of the first flow space.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: February 16, 1999
    Assignee: Kubota Corporation
    Inventors: Yoshikazu Togoshi, Osami Fujiwara, Hideya Umemoto, Hironori Tsuchihashi, Yoshiyuki Esaki, Akio Matsui
  • Patent number: 5823285
    Abstract: A four wheel drive working vehicle having a hydraulic block for covering one side of a propelling transmission case, an engine, and an HST attached to a side of the hydraulic block remote from the transmission case. The HST includes an input shaft for transmitting drive from the engine, and an output shaft extending through the hydraulic block for transmitting the drive to a transmission line in the transmission case. The vehicle further includes a drive transmission mechanism for selectively transmitting the drive from the transmission line to rear wheels, and a transmission shaft for transmitting the drive between the drive transmission mechanism and the transmission line in the transmission case. The drive transmission mechanism is attached to the side of the hydraulic block where the HST is attached. The transmission shaft extends through the hydraulic block.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: October 20, 1998
    Assignee: Kubota Corporation
    Inventors: Hironori Tsuchihashi, Yoshikazu Togoshi, Osami Fujiwara, Teruo Shimamura, Akio Matsui, Hideya Umemoto, Kenichi Chujo, Niro Bando
  • Patent number: 5738179
    Abstract: A work vehicle has an engine hood which may be opened and closed. The vehicle includes a connecting mechanism for allowing the hood to be pivoted upwards after displacement of the hood in the forward or rearward direction relative to the vehicle body, and includes also a movement restricting mechanism for checking sideways and upward movements of the engine hood after the hood is closed. The connecting mechanism includes a first bracket pivotally attached to a vehicle chassis, a second bracket provided to the engine hood, and a connecting member for pivotally interconnecting the first bracket and the second bracket. The movement restricting mechanism includes an engaging portion fixedly provided to the engine hood and an engaged portion provided to the vehicle body for engaging the engaging portion.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: April 14, 1998
    Assignee: Kubota Corporation
    Inventor: Akio Matsui
  • Patent number: 5721083
    Abstract: A color toner that is able of forming a projected image having excellent color reproducibility when a toner image is produced on an optically transparent film by electrophotography, and a color toner that is excellent in chargeability and contaminates the developing roller to a minimum extent is provided. A process for producing the toner is also provided, wherein a color toner containing at least a binder resin, a pigment and a charge controller is produced in a first step of preliminarily kneading a blend of the color toner having a haze degree of 1 through 10% and the pigment with an organic solvent at a temperature lower than the melting temperature of the binder resin followed by a second step of thermal melting and kneading with addition of the binder resin and charge controller.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: February 24, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Minoru Masuda, Akio Matsui, Masami Tomita
  • Patent number: 5542243
    Abstract: A lawn tractor has an engine, front wheels and rear wheels, a body frame extending longitudinally of the tractor, a mower unit supported by the body frame, a grass catcher supported by the body frame, a blower unit supported by the body frame, and a duct for transporting grass clippings cut by the mower unit into the grass catcher. The duct includes a first duct portion extending between the mower unit and the blower unit, and a second duct portion extending between the blower unit and the grass catcher. An output shaft of the engine, an input shaft of the mower unit and an input shaft of the blower unit all extend vertically. The engine output shaft, mower input shaft and blower input shaft are arranged inwardly of the rear wheels in the transverse direction of the body frame and substantially linearly in the longitudinal direction thereof.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: August 6, 1996
    Assignee: Kubota Corporation
    Inventors: Mikio Yuki, Kazuaki Kurohara, Akio Matsui, Katsuhiko Uemura
  • Patent number: 5531151
    Abstract: A rodless cylinder which is capable of minimizing the leak of pressure fluid from a cylinder tube. A slit of an almost trapezoidal section is formed in the cylinder tube in a longitudinal direction thereof, a trapezoidal belt which is fixed to the ends of the cylinder tube at the both ends thereof is fitted into the slit, the trapezoidal belt slidably passes through a piston which is fitted into the cylinder tube, and a piston cup is fitted on the outer periphery of the piston. In addition, ribs are provided between an outer lip of the piston cup which is in abutment against the vicinity of the both sides of the bottom of the trapezoidal belt and an inner lip of the piston cup, and the both side walls of tile slit of the almost trapezoidal section are formed into convexly curved configurations in such a manner that the both side walls of the slit can be connected to the inner peripheral surface of the cylinder tube forming a smooth curve.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: July 2, 1996
    Assignee: Festo KG
    Inventor: Akio Matsui
  • Patent number: 5432620
    Abstract: A mixed mode communication method and apparatus for transmitting mixed mode document data wherein the mixed mode document data is converted into character data only in response to an instruction, and the character data only is transmitted and/or printed out, whereby the transmission time and the print out time can be shortened.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: July 11, 1995
    Assignee: Fujitsu Limited
    Inventors: Chieko Watanabe, Akio Matsui
  • Patent number: 5361680
    Abstract: In a pressure-intensifying type fluid pressure cylinder, an auxiliary cylinder chamber is provided outside a rod cover, a pressure intensifying piston is axially and slidably disposed on the outer peripheral portion of a piston rod in the auxiliary cylinder chamber, and steel balls are disposed around the piston rod in space having a tapered surface in the pressure intensifying piston. Or, a lock concave portion is formed on the outer peripheral portion of the piston rod and a lock member is provided in the pressure intensifying piston which lock member makes the pressure intensifying piston and the piston rod one body by being fixed in the lock concave portion. When the piston rod reaches a little before the end of extrusion, fluid pressure comes through a way in the auxiliary cylinder chamber between the pressure intensifying piston and the rod cover.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: November 8, 1994
    Inventor: Akio Matsui
  • Patent number: 5352385
    Abstract: Described in a joining agent for joining electrically ceramic bodies by heating the joining agent inserted at the parts to be jointed between the ceramic bodies with an electric current flowing predominantly through the joining agent at high temperature. The joining agent is superior in the wetability and reactivity with the ceramics to ensure the joint part strength. The joining agent includes, as an electric conductor, an electric conductive component made of an ion conductor consisting of fluoride, chloride, and/or oxide, which forms carrier ions by the pre-heating and has an electric conductivity higher than that of the ceramic body at the electric current supplying time. During the supplying electric current to time, the joining agent has the electric resistance increased gradually at the molten state of the joining agent by decreasing the density or the mobility of the carrier ions.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: October 4, 1994
    Assignee: Daihen Corporation
    Inventors: Hiroaki Yanagida, Akio Matsui, Tokumitsu Nishi, Kouji Okuda, Hiroshi Takai, Hisakiyo Hoshino, Masahi Numano, Natsumi Miyake
  • Patent number: 5255752
    Abstract: A frame structure for a working vehicle having crawler running devices includes main frames extending longitudinally along right and left sides of a vehicle body. The crawler running devices have track frames extending below and along the main frames, respectively. An oil tank is disposed between the main frames for rigidly interconnecting forward positions of the main frames and rigidly interconnecting the track frames. The frame structure includes an engine supporting frame for supporting an engine rearwardly of the oil tank. The engine supporting frame is connected to the oil tank through a reinforcing beam, and is curved downwardly with an intermediate portion thereof lying substantially level with the bottom of the oil tank.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: October 26, 1993
    Assignee: Kubota Corporation
    Inventors: Norimi Nakamura, Mitsugu Kobayashi, Akio Matsui, Tetsuo Yamaguchi
  • Patent number: D389490
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: January 20, 1998
    Assignee: Kubota Corporation
    Inventors: Teruo Shimamura, Akio Matsui, Yoshihiro Kawahara, Osami Fujiwara, Yoshikazu Togoshi, Hironori Tsuchihashi, Kenichi Chujo, Hideya Umemoto, Niro Bando