Patents by Inventor Megumu Tsuruta

Megumu Tsuruta 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).

  • Publication number: 20220281729
    Abstract: A coupling portion that is coupled to a mast that supports a fork and has a mechanism that moves the fork in a vertical direction, the coupling portion disposed on each of both ends in a width direction of the mast, a rail that is disposed on a straddle leg disposed on an outside in the width direction of the mast and extending in a direction where the fork extends, the rail moving the coupling portion in the direction where the fork extends, and a drive unit that is disposed on the straddle leg and moves the mast along the straddle leg are included.
    Type: Application
    Filed: January 27, 2022
    Publication date: September 8, 2022
    Inventors: Megumu TSURUTA, Keitaro KAMATA, Tetsuhei KOBAYASHI, Kensuke FUTAHASHI, Tatsuya SATO, Naoto KAWAUCHI
  • Patent number: 11427449
    Abstract: A forklift apparatus includes: an error prediction unit configured to predict a first positional error which is a positional error after picking-up between a standard position of a fork and a central position of a pallet on the fork after the pallet is picked up and a first angle error which is an angle error after picking-up with respect to the fork in the pallet; a travel route correction unit configured to correct a travel route from a picking-up position of the pallet to a stacking position of the pallet to offset the first positional error and the first angle error when the pallet is stacked; and a conveyance travel control unit configured to perform travel control such that the pallet is conveyed along the corrected travel route.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: August 30, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Noriyuki Hasegawa, Kensuke Futahashi, Naoto Kawauchi, Megumu Tsuruta, Yusuke Kinouchi, Yasuo Fujishima
  • Patent number: 11384863
    Abstract: A steam valve has a tubular stop valve configured to move toward an upper end side and a lower end side along an axial direction when the stop valve is opened and closed respectively; and a valve main body configured to accommodate the stop valve. The stop valve has a ring-shaped protrusion portion protruded outwardly in a radial direction. The valve main body has an accommodation space for accommodating the protrusion portion which is divided by the protrusion portion into a first pressure space and a second pressure space. First and second feed/discharge portions configured for adjusting a pressure in the first pressure space and the second pressure space respectively are further provided. The protrusion portion is moved upwardly and downwardly by adjusting the pressure in the first pressure space and the second pressure space.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: July 12, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Noriyuki Hasegawa, Kensuke Futahashi, Megumu Tsuruta
  • Patent number: 11306607
    Abstract: A steam valve has a tubular stop valve configured to move toward an upper/lower end side along a direction of an axis when the stop valve is opened/closed; and a valve main body accommodating the stop valve, wherein a base end portion including an end portion of the stop valve at the upper end side is accommodated in a first accommodation space formed in the valve main body, the base end portion has a plurality of inclination surfaces formed on an outer circumference of the base end portion which are inclined such that a distance from the axis to each of the plurality of inclination surfaces decreases toward the upper end side, and a plurality of contact surfaces are formed in the first accommodation space to come in contact with the plurality of inclination surfaces respectively when the stop valve moves toward the upper end side.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: April 19, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Noriyuki Hasegawa, Kensuke Futahashi, Megumu Tsuruta
  • Publication number: 20220082169
    Abstract: A steam valve having a first inclined surface, which is formed at the distal end portion of a valve rod and in which the outer diameter of the valve rod increases from the distal end toward the base end of the valve rod, and a second inclined surface, which is formed on the inside of a portion of a main valve that is positioned on the base-end side of the valve rod and which inclines with the same inclination angle as the first inclined surface. In a state in which a slave valve and the main valve are closed the first inclined surface and the second inclined surface are separated from each other, and when the slave valve and the main valve are in a fully open state the first inclined surface and the second inclined surface abut each other.
    Type: Application
    Filed: December 26, 2019
    Publication date: March 17, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Shingo Nishida, Megumu Tsuruta, Fumiyuki Suzuki, Masaki Hata
  • Patent number: 11007614
    Abstract: Provided is a workpiece retention device that retains a frame which includes a workpiece main body and a lip flange and a base flange that are provided to the workpiece main body, wherein: the workpiece retention device comprises a plurality of grippers that are aligned in the lengthwise direction of the frame, and a horizontal movement mechanism and a vertical movement mechanism that move the plurality of grippers; the gripper each include: a lower block, a workpiece support pin that is provided to the lower block and that supports the frame, an upper block that can move toward the base flange of the supported frame, a block movement mechanism that moves the upper block; and a suction mechanism that is provided to the upper block and that suctions the workpiece main body on the base flange side.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: May 18, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Atsushi Sugai, Shota Hosoi, Takashi Shibutani, Kengo Imaoka, Megumu Tsuruta
  • Publication number: 20200208534
    Abstract: A steam valve has a tubular stop valve configured to move toward an upper/lower end side along a direction of an axis when the stop valve is opened/closed; and a valve main body accommodating the stop valve, wherein a base end portion including an end portion of the stop valve at the upper end side is accommodated in a first accommodation space formed in the valve main body, the base end portion has a plurality of inclination surfaces formed on an outer circumference of the base end portion which are inclined such that a distance from the axis to each of the plurality of inclination surfaces decreases toward the upper end side, and a plurality of contact surfaces are formed in the first accommodation space to come in contact with the plurality of inclination surfaces respectively when the stop valve moves toward the upper end side.
    Type: Application
    Filed: November 27, 2019
    Publication date: July 2, 2020
    Inventors: Noriyuki HASEGAWA, Kensuke FUTAHASHI, Megumu TSURUTA
  • Publication number: 20200208541
    Abstract: A steam valve has a tubular stop valve configured to move toward an upper end side and a lower end side along an axial direction when the stop valve is opened and closed respectively; and a valve main body configured to accommodate the stop valve. The stop valve has a ring-shaped protrusion portion protruded outwardly in a radial direction. The valve main body has an accommodation space for accommodating the protrusion portion which is divided by the protrusion portion into a first pressure space and a second pressure space. First and second feed/discharge portions configured for adjusting a pressure in the first pressure space and the second pressure space respectively are further provided. The protrusion portion is moved upwardly and downwardly by adjusting the pressure in the first pressure space and the second pressure space.
    Type: Application
    Filed: November 27, 2019
    Publication date: July 2, 2020
    Inventors: Noriyuki HASEGAWA, Kensuke FUTAHASHI, Megumu TSURUTA
  • Publication number: 20200009697
    Abstract: Provided is a workpiece retention device that retains a frame which includes a workpiece main body and a lip flange and a base flange that are provided to the workpiece main body, wherein: the workpiece retention device comprises a plurality of grippers that are aligned in the lengthwise direction of the frame, and a horizontal movement mechanism and a vertical movement mechanism that move the plurality of grippers; the gripper each include: a lower block, a workpiece support pin that is provided to the lower block and that supports the frame, an upper block that can move toward the base flange of the supported frame, a block movement mechanism that moves the upper block; and a suction mechanism that is provided to the upper block and that suctions the workpiece main body on the base flange side.
    Type: Application
    Filed: June 7, 2017
    Publication date: January 9, 2020
    Inventors: Atsushi SUGAI, Shota HOSOI, Takashi SHIBUTANI, Kengo IMAOKA, Megumu TSURUTA
  • Publication number: 20200002143
    Abstract: A forklift apparatus includes: an error prediction unit configured to predict a first positional error which is a positional error after picking-up between a standard position of a fork and a central position of a pallet on the fork after the pallet is picked up and a first angle error which is an angle error after picking-up with respect to the fork in the pallet; a travel route correction unit configured to correct a travel route from a picking-up position of the pallet to a stacking position of the pallet to offset the first positional error and the first angle error when the pallet is stacked; and a conveyance travel control unit configured to perform travel control such that the pallet is conveyed along the corrected travel route.
    Type: Application
    Filed: June 26, 2019
    Publication date: January 2, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Noriyuki HASEGAWA, Kensuke FUTAHASHI, Naoto KAWAUCHI, Megumu TSURUTA, Yusuke KINOUCHI, Yasuo FUJISHIMA
  • Patent number: 10023451
    Abstract: A forklift includes a forklift body having a front wheel and a rear wheel, a fork supported to the front of the forklift body so as to be capable of moving vertically via a mast, a lift cylinder capable of moving the fork up and down, a hydraulic pressure supply line capable of supplying hydraulic pressure to a head-side chamber in the lift cylinder, a hydraulic pressure exhaust line capable of exhausting hydraulic pressure from a rod-side chamber in the lift cylinder, and a changeover valve provided on the hydraulic pressure exhaust line, wherein a control device changes a pressure balance between hydraulic pressure on the head-side chamber and hydraulic pressure on the rod-side chamber in the lift cylinder by the changeover valve to restrict the operation of the lift cylinder, when a weight of a load on the fork exceeds a limit load weight.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: July 17, 2018
    Assignee: MITSUBISHI NICHIYU FORKLIFT CO., LTD.
    Inventors: Megumu Tsuruta, Masataka Kawaguchi, Kensuke Futahashi, Naohito Hashimoto
  • Patent number: 9993979
    Abstract: The present invention has a cooling unit (29) as a temperature gradient formation unit for forming a temperature gradient in which the temperature is lowered in the direction from one surface (18a) of a semi-cured prepreg sheet (18) layered on a top surface (12a) of a layered body (12) toward the other surface (17b) of a release sheet (17), in a first region (C1) of a layered sheet (16) located upstream from a first roller (52).
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: June 12, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Shibutani, Megumu Tsuruta, Kosuke Owatari, Toshikazu Ueda, Yukiharu Yamasaki
  • Patent number: 9956705
    Abstract: This compactor includes first rollers having first roller surfaces that press a laminated sheet from the second surface side of a release sheet, the first rollers being disposed separated from each other; and a second roller having a second roller surface that presses the laminated sheet from the second surface side of the release sheet, the second roller being disposed such that the second roller surface faces a gap provided between the first rollers.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: May 1, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Megumu Tsuruta, Takashi Shibutani, Kentarou Saeki, Yoshitomo Noda, Kosuke Owatari
  • Publication number: 20170001343
    Abstract: This compactor includes first rollers having first roller surfaces that press a laminated sheet from the second surface side of a release sheet, the first rollers being disposed separated from each other; and a second roller having a second roller surface that presses the laminated sheet from the second surface side of the release sheet, the second roller being disposed such that the second roller surface faces a gap provided between the first rollers.
    Type: Application
    Filed: January 9, 2015
    Publication date: January 5, 2017
    Inventors: Megumu TSURUTA, Takashi SHIBUTANI, Kentarou SAEKI, Yoshitomo NODA, Kosuke OWATARI
  • Patent number: 9441500
    Abstract: A steam turbine casing position adjusting apparatus capable of employing a compact low-resolution actuator is provided. A steam turbine casing position adjusting apparatus 40 includes turbine casings 21 and 37, a rotor 23, and actuators 14 and 15 that move the turbine casings 21 and 37 in the axial direction. The actuators 14 and 15 are disposed radially outside outer peripheries forming the turbine casings 21 and 37 .
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: September 13, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takumi Hori, Megumu Tsuruta, Shin Asano, Tamiaki Nakazawa, Ryokichi Hombo
  • Publication number: 20160243769
    Abstract: The present invention has a cooling unit (29) as a temperature gradient formation unit for forming a temperature gradient in which the temperature is lowered in the direction from one surface (18a) of a semi-cured prepreg sheet (18) layered on a top surface (12a) of a layered body (12) toward the other surface (17b) of a release sheet (17), in a first region (C1) of a layered sheet (16) located upstream from a first roller (52).
    Type: Application
    Filed: November 5, 2014
    Publication date: August 25, 2016
    Inventors: Takashi SHIBUTANI, Megumu TSURUTA, Kosuke OWATARI, Toshikazu UEDA, Yukiharu YAMASAKI
  • Patent number: 9334881
    Abstract: A forklift (1) according to the present invention includes: an engine (7); a hydraulically-operated device for cargo handling (2); a pump for cargo handling (5) that is driven by the engine (7); hydraulic piping for cargo handling (8) that connects the pump for cargo handling (5) and the hydraulically-operated device for cargo handling (2); discharge piping (110) that branches from the hydraulic piping for cargo handling (8) and is connected to a tank (4); a switching valve (111) capable of switching the opening and closing of the discharge piping (110); a control device (13) that closes the discharge piping (110) when the rotation speed of the engine (7) is larger than a predetermined value, and opens the discharge piping (110) when the rotation speed of the engine (7) is less than or equal to a predetermined value; and a sub-relief valve (112) that adjusts the flow rate of hydraulic oil that is discharged from the discharge piping (110) to the tank (4), on the bases of the pressure or the flow rate of the h
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: May 10, 2016
    Assignee: MITSUBISHI NICHIYU FORKLIFT CO., LTD.
    Inventors: Megumu Tsuruta, Keiji Ito, Takuya Nakada
  • Patent number: 9096212
    Abstract: In a vehicle and a method of controlling the same, a controller determines whether an idle-stop condition is satisfied or not when an engine is driven, and stops idling of the engine when it is determined that the idle-stop condition is satisfied. In addition, while the idling of the engine is stopped, when an operation order given to a fork driving cylinder by manipulation of a cargo handling lever is received, the controller starts the engine, and switches an oil pump for cargo handling of the fork driving cylinder to an on-load state before an engine revolution number reaches an idling revolution number region.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: August 4, 2015
    Assignee: MITSUBISHI NICHIYU FORKLIFT CO., LTD.
    Inventors: Kensuke Futahashi, Kiyomitsu Ogawa, Megumu Tsuruta
  • Publication number: 20150030405
    Abstract: A machine tool includes a machine tool main body, a ram which is supported with respect to the machine tool main body in a movable manner, a main shaft which is supported by the ram in a drivable and rotatable manner, an attachment which can be attached to and detached from a tip end portion of the ram and includes a driving shaft rotated according to rotation of the main shaft and a tool provided on the driving shaft, and a NC device which performs a numerical control based on machining data, and performs machining of a processing target. The control method of a machine tool includes a step of decreasing at least one of a ram overhang amount or a feeding amount when stress applied to the attachment is larger than allowable stress of the attachment based on a machining condition including a diameter, a depth of cut, and a feeding amount of the tool, and information including the ram overhang amount, a shape of the attachment, and a material of the processing target.
    Type: Application
    Filed: March 21, 2013
    Publication date: January 29, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Megumu Tsuruta, Naotaka Komatsu, Katsuyoshi Takeuchi, Takashi Shibutani, Satoshi Furutate
  • Publication number: 20140241840
    Abstract: A forklift includes a forklift body having a front wheel and a rear wheel, a fork supported to the front of the forklift body so as to be capable of moving vertically via a mast, a lift cylinder capable of moving the fork up and down, a hydraulic pressure supply line capable of supplying hydraulic pressure to a head-side chamber in the lift cylinder, a hydraulic pressure exhaust line capable of exhausting hydraulic pressure from a rod-side chamber in the lift cylinder, and a changeover valve provided on the hydraulic pressure exhaust line, wherein a control device changes a pressure balance between hydraulic pressure on the head-side chamber and hydraulic pressure on the rod-side chamber in the lift cylinder by the changeover valve to restrict the operation of the lift cylinder, when a weight of a load on the fork exceeds a limit load weight.
    Type: Application
    Filed: February 7, 2012
    Publication date: August 28, 2014
    Applicant: MITSUBISHI NICHIYU FORKLIFT CO., LTD.
    Inventors: Megumu Tsuruta, Masataka Kawaguchi, Kensuke Futahashi, Naohito Hashimoto