Patents by Inventor Ryuji SHIRATANI

Ryuji SHIRATANI 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: 12173479
    Abstract: A shovel includes a lower travel body, an upper swivel body that is swingably installed on the lower travel body, an attachment that is installed on the upper swivel body, and a posture detecting device that detects a posture of the attachment, wherein a virtual plane is generated by utilizing information about a position of a predetermined portion of the attachment obtained from an output of the posture detecting device.
    Type: Grant
    Filed: March 18, 2022
    Date of Patent: December 24, 2024
    Assignee: SUMITOMO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Ryuji Shiratani, Hajime Aragaki, Tomoki Kurokawa
  • Patent number: 12116751
    Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an attachment attached to the upper turning body, an attachment actuator configured to move the attachment, and processing circuitry configured to assist an operator so that a level difference between two adjacent finished surfaces becomes equal to or less than a predetermined value.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: October 15, 2024
    Assignee: SUMITOMO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Ryuji Shiratani, Tomoki Kurokawa
  • Publication number: 20240271392
    Abstract: An excavator includes: a traveling lower body including left and right crawlers; a revolving upper body on the traveling lower body, to be capable of revolving; hydraulic motors to drive the crawlers; left and right traveling operation device to drive the hydraulic motors; a hydraulic pump to supply hydraulic oil to the hydraulic motors; and a detector to detect states of the traveling operation devices. The excavator causes the detector to detect whether there is a predetermined difference between amounts of operations of the left and right traveling operation devices, and upon detecting the predetermined difference between the amounts of operations of the left and right traveling operation devices, suppresses an amount of change in a command value related to a flow rate of the hydraulic oil discharged by the hydraulic pump.
    Type: Application
    Filed: September 28, 2023
    Publication date: August 15, 2024
    Inventors: Riichi NISHIKAWARA, Ryuji SHIRATANI, Kiminori SANO, Tomoki KUROKAWA, Hajime ARAGAKI
  • Patent number: 12018460
    Abstract: An excavator may include a lower traveling body; an upper turning body pivotally installed to the lower traveling body; an engine installed in the upper turning body; a main pump driven by the engine; and a processor and a memory that stores program instructions causing the processor to control a flow rate of hydraulic oil discharged by the main pump. The program instructions can cause the processor to, when a load of the engine increases, delay a response of the main pump 14 until an actual torque of the engine rises up to a level corresponding to the load of the engine.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: June 25, 2024
    Assignee: SUMITOMO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Kiminori Sano, Ryuji Shiratani
  • Patent number: 11879589
    Abstract: A shovel includes a lower traveling body, an upper turning body turnably attached to the lower traveling body, an automatic greasing device mounted on the upper turning body, and a control device configured to control the automatic greasing device. The control device is configured to control timing to start greasing by the automatic greasing device based on the past operating condition of the shovel.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: January 23, 2024
    Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Ryuji Shiratani, Hiroyuki Kurokawa, Hajime Aragaki
  • Patent number: 11761168
    Abstract: A shovel includes an upper swing structure, a cab mounted on the upper swing structure, and an operating lever provided in the cab. The operating lever includes a lever part to which a grip part is fixed, a holder part to which the lever part is connected, and a joint part connecting the lever part and the holder part. The lever part is configured to be attachable to and detachable from the holder part in a tool-free manner with a predetermined manual operation on the joint part.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: September 19, 2023
    Assignee: SUMITOMO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Ryuji Shiratani, Hiroyuki Kurokawa, Hajime Aragaki
  • Patent number: 11746497
    Abstract: A shovel includes a traveling body, a turning body turnably mounted on the traveling body, an attachment attached to the turning body and including a boom, an arm, and a bucket, and a processor, wherein the processor is configured to relatively slow down an operation of the attachment in such a direction as to terminate a state in which the traveling body is lifted, after the shovel enters the state in which the traveling body is lifted.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: September 5, 2023
    Assignee: SUMITOMO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Ryuji Shiratani, Hajime Aragaki, Masaaki Yamamoto
  • Publication number: 20220205225
    Abstract: A shovel includes a lower travel body, an upper swivel body that is swingably installed on the lower travel body, an attachment that is installed on the upper swivel body, and a posture detecting device that detects a posture of the attachment, wherein a virtual plane is generated by utilizing information about a position of a predetermined portion of the attachment obtained from an output of the posture detecting device.
    Type: Application
    Filed: March 18, 2022
    Publication date: June 30, 2022
    Inventors: Ryuji SHIRATANI, Hajime ARAGAKI, Tomoki KUROKAWA
  • Publication number: 20220136215
    Abstract: A work machine includes a lower traveling structure, an upper swing structure swingably mounted on the lower traveling structure, an attachment attached to the upper swing structure, a surrounding area monitor, and a display. The display is configured to display guidance with respect to an object detected by the surrounding area monitor.
    Type: Application
    Filed: January 13, 2022
    Publication date: May 5, 2022
    Inventors: Ryuji SHIRATANI, Daisuke KITAJIMA, Hajime ARAGAKI
  • Publication number: 20220010522
    Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an attachment attached to the upper turning body, an attachment actuator configured to move the attachment, and processing circuitry configured to assist an operator so that a level difference between two adjacent finished surfaces becomes equal to or less than a predetermined value.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Inventors: Ryuji SHIRATANI, Tomoki KUROKAWA
  • Publication number: 20220010529
    Abstract: A shovel includes a lower traveling structure, an upper swing structure swingably mounted on the lower traveling structure, an engine mounted on the upper swing structure, a first hydraulic pump and a second hydraulic pump each configured to be driven by the engine, a first regulator configured to control the first geometric displacement of the first hydraulic pump, a second regulator configured to control the second geometric displacement of the second hydraulic pump, and processing circuitry configured to electrically control the first and second regulators. Each of the first and second hydraulic pumps is an electrically controlled variable displacement hydraulic pump. The processing circuitry is configured to calculate the limit value of the first and second geometric displacements based on the respective discharge pressures of the first and second hydraulic pumps, and to control each of the first and second geometric displacements based on the calculated limit value.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Inventors: Kiminori SANO, Ryuji SHIRATANI
  • Publication number: 20220002965
    Abstract: A shovel includes a lower traveling structure, an upper swing structure swingably mounted on the lower traveling structure, a first hydraulic pump provided on the upper swing structure, an attachment attached to the upper swing structure, a first actuator, a second actuator, a first directional control valve corresponding to the first actuator, a second directional control valve corresponding to the second actuator, a first conduit connecting the first hydraulic pump and the first directional control valve, a second conduit connecting the first conduit and the second directional control valve, a control valve installed in the second conduit, and processing circuitry configured to control the opening area of the control valve according to information on work details.
    Type: Application
    Filed: September 16, 2021
    Publication date: January 6, 2022
    Inventors: Youji MISAKI, Ryuji SHIRATANI
  • Publication number: 20220002975
    Abstract: An excavator may include a lower traveling body; an upper turning body pivotally installed to the lower traveling body; an engine installed in the upper turning body; a main pump driven by the engine; and a processor and a memory that stores program instructions causing the processor to control a flow rate of hydraulic oil discharged by the main pump. The program instructions can cause the processor to, when a load of the engine increases, delay a response of the main pump 14 until an actual torque of the engine rises up to a level corresponding to the load of the engine.
    Type: Application
    Filed: September 22, 2021
    Publication date: January 6, 2022
    Inventors: Kiminori SANO, Ryuji SHIRATANI
  • Publication number: 20210404141
    Abstract: A shovel includes a lower traveling structure, an upper swing structure swingably mounted on the lower traveling structure, an engine mounted on the upper swing structure, a hydraulic pump configured to be driven by the engine, and processing circuitry configured to determine a command value by energy saving control and to control a flow rate of hydraulic oil discharged by the hydraulic pump according to the command value. The processing circuitry is configured to control the command value.
    Type: Application
    Filed: September 10, 2021
    Publication date: December 30, 2021
    Inventors: Kiminori SANO, Ryuji SHIRATANI
  • Patent number: 11186964
    Abstract: A shovel includes a lower traveling body, an upper rotating body rotatably mounted on the lower traveling body, a cab mounted on the upper rotating body, a left monitor mounted on a left pillar inside the cab, a right monitor mounted on a right pillar inside the cab, a left camera configured to capture an image of an area on a left side of the upper rotating body, a right camera configured to capture an image of an area on a right side of the upper rotating body, and a controller configured to control both the left monitor and the right monitor. The controller is configured to cause the left monitor to continuously display a mirror image generated from the image captured by the left camera, and to cause the right monitor to continuously display a mirror image generated from the image captured by the right camera.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: November 30, 2021
    Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Kouichiro Tomita, Hajime Aragaki, Ryuji Shiratani
  • Publication number: 20210189689
    Abstract: A shovel includes an upper swing structure, a cab mounted on the upper swing structure, and an operating lever provided in the cab. The operating lever includes a lever part to which a grip part is fixed, a holder part to which the lever part is connected, and a joint part connecting the lever part and the holder part. The lever part is configured to be attachable to and detachable from the holder part in a tool-free manner with a predetermined manual operation on the joint part.
    Type: Application
    Filed: January 28, 2021
    Publication date: June 24, 2021
    Inventors: Ryuji SHIRATANI, Hiroyuki KUROKAWA, Hajime ARAGAKI
  • Publication number: 20210025134
    Abstract: A shovel includes an undercarriage, an upper swing structure swingably attached to the undercarriage, and an automatic greaser mounted on the upper swing structure. The automatic greaser is configured to individually change the amount of grease fed to a first greasing point among multiple greasing points and the amount of grease fed to a second greasing point among the multiple greasing points based on information on the multiple greasing points.
    Type: Application
    Filed: September 28, 2020
    Publication date: January 28, 2021
    Inventors: Ryuji SHIRATANI, Hiroyuki KUROKAWA, Hajime ARAGAKI
  • Publication number: 20200362532
    Abstract: A shovel includes a traveling body, a turning body turnably mounted on the traveling body, an attachment attached to the turning body and including a boom, an arm, and a bucket, and a processor, wherein the processor is configured to relatively slow down an operation of the attachment in such a direction as to terminate a state in which the traveling body is lifted, after the shovel enters the state in which the traveling body is lifted.
    Type: Application
    Filed: August 6, 2020
    Publication date: November 19, 2020
    Inventors: Ryuji SHIRATANI, Hajime ARAGAKI, Masaaki YAMAMOTO
  • Publication number: 20200018440
    Abstract: A shovel includes a lower traveling body, an upper turning body turnably attached to the lower traveling body, an automatic greasing device mounted on the upper turning body, and a control device configured to control the automatic greasing device. The control device is configured to control timing to start greasing by the automatic greasing device based on the past operating condition of the shovel.
    Type: Application
    Filed: September 25, 2019
    Publication date: January 16, 2020
    Inventors: Ryuji SHIRATANI, Hiroyuki KUROKAWA, Hajime ARAGAKI
  • Publication number: 20180305893
    Abstract: A shovel includes a lower traveling body, an upper rotating body rotatably mounted on the lower traveling body, a cab mounted on the upper rotating body, a left monitor mounted on a left pillar inside the cab, a right monitor mounted on a right pillar inside the cab, a left camera configured to capture an image of an area on a left side of the upper rotating body, a right camera configured to capture an image of an area on a right side of the upper rotating body, and a controller configured to control both the left monitor and the right monitor. The controller is configured to cause the left monitor to continuously display a mirror image generated from the image captured by the left camera, and to cause the right monitor to continuously display a mirror image generated from the image captured by the right camera.
    Type: Application
    Filed: June 28, 2018
    Publication date: October 25, 2018
    Inventors: Kouichiro TOMITA, Hajime ARAGAKI, Ryuji SHIRATANI