Patents by Inventor Masahiro Kawamoto

Masahiro Kawamoto 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: 11149757
    Abstract: Provided is a hydraulic drive apparatus of a work machine capable of reducing a surge pressure. The hydraulic drive apparatus includes a control valve interposed between the hydraulic pump and a hydraulic actuator, an operation device moving the control valve in response to an actuator operation, an unload valve, an unload operation valve changing a pilot pressure of the unload valve in response to an input of an unload operation command, a target pressure calculation part, and an unload operation command part. The target pressure calculation part calculates a target pressure that increases with an increase in the holding pressure of the hydraulic actuator. The unload operation command part inputs an unload operation command to the unload operation valve to make the pump pressure of the hydraulic pump follow the target pressure.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: October 19, 2021
    Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Natsuki Yumoto, Masahiro Kawamoto
  • Patent number: 11148881
    Abstract: Each of a plurality of automated storages includes: storage shelves with multiple levels; a plurality of transport carriages; a plurality of relay portions; and a lift base capable of being raised and lowered. A transport device includes a plurality of transport conveyors. Each of the plurality of transport conveyors includes: a plurality of receiving portions configured to receive articles; a loading portion configured to deliver articles transported by the transport conveyor and to load the articles to the automated storages; and a transport portion configured to transport articles received at the receiving portions to the plurality of loading portions. The transport portion included in each of the plurality of transport conveyors is installed such that a movement trajectory of articles transported by the transport portion does not overlap a movement trajectory of articles transported by another transport portion.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: October 19, 2021
    Assignee: Daifuku Co., Ltd.
    Inventors: Tooru Siraisi, Norihiro Okatsu, Masahiro Sato, Masaru Yagi, Makoto Kawamoto
  • Patent number: 11143118
    Abstract: To provide a control device for a vehicle capable of controlling the torque of a drive source so as to appropriately balance the suppression of body vibrations and the securing of a transient response during acceleration or deceleration. This control device for a vehicle includes an accelerator position sensor that detects the accelerator opening, a torque adjustment mechanism such as a throttle valve that adjusts the torque of an engine as the drive source of the vehicle, and a powertrain control module (PCM) that controls the torque adjustment mechanism based on the accelerator opening. The PCM sets the target acceleration of the vehicle based on the accelerator opening, sets the target torsion angle of the drive shaft based on the target acceleration, sets the target torque of the engine based on the target torsion, and controls the torque adjustment mechanism based on the target torque.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: October 12, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Yuichiro Yamane, Akira Tsuda, Yuki Ishiyama, Takefumi Takada, Yuto Sakasegawa, Kazuki Kawamoto, Jumpei Takeda, Hiroyuki Morioka, Shin Kato, Masahiro Nagoshi, Atsushi Yamasaki
  • Publication number: 20210313354
    Abstract: A display substrate of the present invention has a thermal shrinkage value of 10 ppm or less when the display substrate is increased in temperature from normal temperature to 500° C. at a temperature increase rate of 5° C./min, held at 500° C. for 1 hour, and then cooled to normal temperature at a temperature decrease rate of 5° C./min.
    Type: Application
    Filed: July 30, 2019
    Publication date: October 7, 2021
    Inventors: Atsushi MUSHIAKE, Takashi MURATA, Tetsuya MURATA, Hiroki KATAYAMA, Kosuke KAWAMOTO, Masahiro HAYASHI
  • Publication number: 20210277630
    Abstract: Provided is a hydraulic drive apparatus of a work machine capable of reducing a surge pressure. The hydraulic drive apparatus includes a control valve interposed between the hydraulic pump and a hydraulic actuator, an operation device moving the control valve in response to an actuator operation, an unload valve, an unload operation valve changing a pilot pressure of the unload valve in response to an input of an unload operation command, a target pressure calculation part, and an unload operation command part. The target pressure calculation part calculates a target pressure that increases with an increase in the holding pressure of the hydraulic actuator. The unload operation command part inputs an unload operation command to the unload operation valve to make the pump pressure of the hydraulic pump follow the target pressure.
    Type: Application
    Filed: February 17, 2021
    Publication date: September 9, 2021
    Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Natsuki YUMOTO, Masahiro KAWAMOTO
  • Patent number: 10288313
    Abstract: A gas supply manifold has a nozzle forming member having a plurality of gas injection nozzles, a cover member configured to be overlapped on the nozzle forming member, and a caulking-fastening portion configured to fasten the nozzle forming member and the cover member. The caulking-fastening portion is configured such that a convex portion provided for one of the nozzle forming member and the cover member penetrates a hole provided for the other member, and a tip end portion of the convex portion has an engagement portion, the engagement portion having a larger diameter or a larger width than the hole and being engaged with a peripheral edge portion of the hole. A tip end face of the convex portion has a dent portion formed by pressing the tip end face into a base portion side of the convex portion and an area around the dent portion constitutes the engagement portion. Thus, the nozzle forming member and the cover member are appropriately caulked and fastened.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 14, 2019
    Assignee: NORITZ CORPORATION
    Inventors: Naoki Se, Michihisa Nakahara, Hideyuki Fujisawa, Kenichi Sakurai, Yuta Tsuji, Keizo Kawano, Taihei Terasawa, Masahiro Kawamoto, Masaharu Imaizumi
  • Publication number: 20170184324
    Abstract: A gas supply manifold has a nozzle forming member having a plurality of gas injection nozzles, a cover member configured to be overlapped on the nozzle forming member, and a caulking-fastening portion configured to fasten the nozzle forming member and the cover member. The caulking-fastening portion is configured such that a convex portion provided for one of the nozzle forming member and the cover member penetrates a hole provided for the other member, and a tip end portion of the convex portion has an engagement portion, the engagement portion having a larger diameter or a larger width than the hole and being engaged with a peripheral edge portion of the hole. A tip end face of the convex portion has a dent portion formed by pressing the tip end face into a base portion side of the convex portion and an area around the dent portion constitutes the engagement portion. Thus, the nozzle forming member and the cover member are appropriately caulked and fastened.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 29, 2017
    Applicant: NORITZ CORPORATION
    Inventors: Naoki SE, Michihisa NAKAHARA, Hideyuki FUJISAWA, Kenichi SAKURAI, Yuta TSUJI, Keizo KAWANO, Taihei TERASAWA, Masahiro KAWAMOTO, Masaharu IMAIZUMI
  • Patent number: 8703378
    Abstract: A method of manufacturing toner including mixing mother toner particles containing a binder resin and a coloring agent and first particles having an average primary particle diameter of from 100 nm to 1 ?m to using a mixer including a rotary shaft member, multiple stirring members provided to the surface of the shaft member, and a casing to cover the multiple stirring members, wherein the cross section of the inner periphery of the casing relative to a direction perpendicular to the rotation axis of the shaft member is circular around the rotation axis with a substantially constant distance between the inner periphery and the rotation axis. The casing covers the multiple stirring members and a cooling jacket is provided to at least part of the outer periphery of the casing. The weight ratio of the particles to the mother toner particles is from 1.5% to 10%.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: April 22, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohsuke Satoh, Tetsuya Tanaka, Masahiro Kawamoto, Natsuko Matsushita
  • Patent number: 8580476
    Abstract: A toner for developing an electrostatic image is provided. The toner includes at least a binder resin; a colorant; and a particulate release agent. The particulate release agent is prepared by heating the release agent to a temperature not lower than a melting point of the release agent to melt the release agent, dissolving the melted release agent in a supercritical fluid or a sub-critical fluid, and feeding the solution into a liquid so that the solution is depressurized and the particulate release agent is formed in the liquid.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: November 12, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahide Yamada, Chiaki Tanaka, Masahiro Kawamoto, Tatsunori Kamiyama, Satoshi Izumi
  • Publication number: 20130264406
    Abstract: A media stirrer mill, including a dispersion container; a stirring member rotatable in the dispersion container; and a dispersion chamber formed in a gap between the stirring member and the dispersion container, including a dispersion media configured to disperse a material, wherein the dispersion container includes concavities having arc-like bottoms and convexities on its inner wall surface.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 10, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroki Morioka, Shigeo Hatada, Masahiro Kawamoto
  • Patent number: 8444073
    Abstract: A continuous kneading apparatus including: a stationary portion having an internal space where matter is conveyed; a rotary disc member and a screw member which are configured to convey the matter in the internal space; a drive shaft member to which the rotary disc member and the screw member are fixed; and a cooling medium passage through which a cooling medium passes, wherein the cooling medium passage is provided for the screw member which is placed upstream of the rotary disc member with respect to the conveyance direction of the matter, wherein the cooling medium passing in the cooling medium passage is lower in temperature than the matter passing in the internal space, and wherein the matter passes in the internal space while provided with shear force by rotation of the drive shaft member and thus continuously kneaded, and while cooled by the cooling medium.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: May 21, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kawamoto, Tetsuya Tanaka, Kenta Kenjoh, Satoshi Izumi, Ippei Muneoka
  • Patent number: 8216760
    Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: July 10, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
  • 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: 20120070774
    Abstract: A method of manufacturing toner including mixing mother toner particles containing a binder resin and a coloring agent and first particles having an average primary particle diameter of from 100 nm to 1 ?m to using a mixer including a rotary shaft member, multiple stirring members provided to the surface of the shaft member, and a casing to cover the multiple stirring members, wherein the cross section of the inner periphery of the casing relative to a direction perpendicular to the rotation axis of the shaft member is circular around the rotation axis with a substantially constant distance between the inner periphery and the rotation axis. The casing covers the multiple stirring members and a cooling jacket is provided to at least part of the outer periphery of the casing. The weight ratio of the particles to the mother toner particles is from 1.5% to 10%.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 22, 2012
    Inventors: Kohsuke SATOH, Tetsuya Tanaka, Masahiro Kawamoto, Natsuko Matsushita
  • Publication number: 20110236818
    Abstract: A toner for developing an electrostatic image is provided. The toner includes at least a binder resin; a colorant; and a particulate release agent. The particulate release agent is prepared by heating the release agent to a temperature not lower than a melting point of the release agent to melt the release agent, dissolving the melted release agent in a supercritical fluid or a sub-critical fluid, and feeding the solution into a liquid so that the solution is depressurized and the particulate release agent is formed in the liquid.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 29, 2011
    Inventors: Masahide YAMADA, Chiaki TANAKA, Masahiro KAWAMOTO, Tatsunori KAMIYAMA, Satoshi IZUMI
  • Publication number: 20110159423
    Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.
    Type: Application
    Filed: March 7, 2011
    Publication date: June 30, 2011
    Inventors: Naotoshi KINOSHITA, Tetsuya Tanaka, Masahiro Kawamoto
  • Publication number: 20110139909
    Abstract: A continuous kneading apparatus including: a stationary portion having an internal space where matter is conveyed; a rotary disc member and a screw member which are configured to convey the matter in the internal space; a drive shaft member to which the rotary disc member and the screw member are fixed; and a cooling medium passage through which a cooling medium passes, wherein the cooling medium passage is provided for the screw member which is placed upstream of the rotary disc member with respect to the conveyance direction of the matter, wherein the cooling medium passing in the cooling medium passage is lower in temperature than the matter passing in the internal space, and wherein the matter passes in the internal space while provided with shear force by rotation of the drive shaft member and thus continuously kneaded, and while cooled by the cooling medium.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 16, 2011
    Inventors: Masahiro Kawamoto, Tetsuya Tanaka, Kenta Kenjoh, Satoshi Izumi, Ippei Muneoka
  • Patent number: 7927777
    Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: April 19, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
  • Patent number: 7879268
    Abstract: An apparatus for manufacturing a particulate resin, including: a fine nozzle opening configured to extrude a melted resin mixture including a resin; an extrusion output control mechanism for controlling an extrusion output of the melted resin mixture; a collision mechanism configured to collide the melted resin mixture extruded from the fine nozzle opening with a high-temperature gas stream having a temperature of not less than a T1/2 temperature of the resin, so that the melted resin mixture is granulated to provide a particulate resin; a heat retention mechanism configured to retain the particulate resin in an atmosphere having a temperature of not less than a Tg of the resin for 0.01 to 10 seconds; and a cooling mechanism configured to cool the particulate resin; and a method for manufacturing a particulate resin using the apparatus.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: February 1, 2011
    Assignee: Ricoh Company Limited
    Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
  • Patent number: 7790344
    Abstract: A method of preparing a powder, including bombarding a spray gas to a liquid material through a spray nozzle to form an atomized liquid material; and solidifying the atomized liquid material, wherein 5 to 40% by weight of the spray gas are previously mixed with the liquid material to form a two-phase flow in a flow path of the spray nozzle, and 60 to 95% by weight of the spray gas is further discharged from a circumference of the flow path discharging the two-phase flow and bombarded thereto to uniformly atomize the liquid material.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: September 7, 2010
    Assignee: Ricoh Company Limited
    Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto