Patents by Inventor Tetsuo Yamaguchi
Tetsuo Yamaguchi 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: 20250003485Abstract: A control system to control an operation of a power transmission of a work vehicle includes a storage to store data indicating a relationship between a ratio between a rotational speed of a predetermined component on a power transmission path to transmit the rotation of the planetary transmission to wheels and a rotational speed of the internal combustion engine, and switching points at which the transmission gear of the planetary transmission is switched, and a controller to control the hydraulic clutch mechanism to perform switching of the transmission gear. Where the transmission gear is switched when the ratio changes to reach a first value corresponding to a first switching point or after the ratio reaches the first value, the controller controls the hydraulic clutch mechanism so as to start hydraulic fluid charging to perform switching of the transmission gear before the ratio reaches the first value.Type: ApplicationFiled: June 25, 2024Publication date: January 2, 2025Inventors: Tetsuo YAMAGUCHI, Komei YAMAWAKI, Mizuki UENO
-
Patent number: 12055212Abstract: An electromagnetic valve control device includes a current gear ratio obtainer to obtain a current gear ratio as a ratio of an output revolutions number of a driver and an output revolutions number of a transmission, a current electric current value obtainer to obtain a current electric current value as a value of an electric current to be inputted to a first electromagnetic valve or a second electromagnetic valve, and a switching controller to, based on the current electric current value and a gear ratio difference as a difference between a target gear ratio and the current gear ratio, perform electromagnetic valve switching control to switch between use of the first electromagnetic valve to control a pump swash plate and use of the second electromagnetic valve to control the pump swash plate.Type: GrantFiled: October 12, 2023Date of Patent: August 6, 2024Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Ryoma Iwase
-
Patent number: 12025210Abstract: A continuously variable powertrain device for a work vehicle includes a hydraulic static transmission to output a continuously shifted motive power while continuously varying a velocity of a motive power received from an engine, a planetary transmission to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power, a pressure detector to detect a hydraulic pressure in a closed circuit of the hydraulic static transmission, a planetary clutch mechanism to switch a shift level of the planetary transmission, and a powertrain controller to control actuation of the hydraulic static transmission and the planetary transmission based on a shift command.Type: GrantFiled: November 7, 2023Date of Patent: July 2, 2024Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Ryoma Iwase
-
Patent number: 12018750Abstract: A work vehicle includes a restrainer vehicle speed setter to set a restrainer vehicle speed, and a switch restrainer to permit switching of the forward/backward travel switching device while a detected vehicle speed is lower than the restrainer vehicle speed and prevent switching of the forward/backward travel switching device while the detected vehicle speed is a high speed not lower than the restrainer vehicle speed.Type: GrantFiled: November 16, 2023Date of Patent: June 25, 2024Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Ryoma Iwase
-
Patent number: 12018737Abstract: A continuously variable powertrain device for a work vehicle includes a continuously variable transmission to output a continuously shifted motive power while continuously varying a speed of a motive power received from an engine, a planetary transmission to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power, a planetary clutch to switch a shift level of the planetary transmission a forward-reverse direction switch to receive the compound motive power and to output either a forward motive power or a reverse motive power, rotation detectors, and a powertrain controller.Type: GrantFiled: November 7, 2023Date of Patent: June 25, 2024Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Ryoma Iwase, Tomonari Tsuchida
-
Patent number: 12013032Abstract: An electromagnetic valve control device includes a control signal generator to, through feedback control involving an environmental coefficient, generate a control signal intended for at least one electromagnetic valve and corresponding to a target electric current value, a coefficient determiner to determine an environmental coefficient during a learning period from a start of a driver operation to an end of a predetermined time, and an operation limiter to limit respective operations of the at least one electromagnetic valve and a gear transmission during the learning period.Type: GrantFiled: October 16, 2023Date of Patent: June 18, 2024Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Ryoma Iwase
-
Publication number: 20240167549Abstract: A continuously variable powertrain device for a work vehicle includes a continuously variable transmission to output a continuously shifted motive power while continuously varying a speed of a motive power received from an engine, a planetary transmission to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power, a planetary clutch to switch a shift level of the planetary transmission a forward-reverse direction switch to receive the compound motive power and to output either a forward motive power or a reverse motive power, rotation detectors, and a powertrain controller.Type: ApplicationFiled: November 7, 2023Publication date: May 23, 2024Inventors: Tetsuo YAMAGUCHI, Ryoma IWASE, Tomonari TSUCHIDA
-
Publication number: 20240167566Abstract: A work vehicle includes a restrainer vehicle speed setter to set a restrainer vehicle speed, and a switch restrainer to permit switching of the forward/backward travel switching device while a detected vehicle speed is lower than the restrainer vehicle speed and prevent switching of the forward/backward travel switching device while the detected vehicle speed is a high speed not lower than the restrainer vehicle speed.Type: ApplicationFiled: November 16, 2023Publication date: May 23, 2024Inventors: Tetsuo YAMAGUCHI, Ryoma IWASE
-
Publication number: 20240166211Abstract: A work vehicle includes a controller configured or programmed to include an input revolutions number calculator to calculate an input revolutions number, and a vehicle speed controller switchable between a first vehicle-speed control mode and a second vehicle-speed control mode. In the first vehicle-speed control mode, the vehicle speed controller is configured or programmed to control a vehicle speed of the work vehicle based on a value detected by an input rotation sensor. In the second vehicle-speed control mode, the vehicle speed controller is configured or programmed to control the vehicle speed based on a value calculated by the input revolutions number calculator.Type: ApplicationFiled: November 16, 2023Publication date: May 23, 2024Inventors: Tetsuo YAMAGUCHI, Ryoma IWASE, Tomonari TSUCHIDA
-
Publication number: 20240167562Abstract: An electromagnetic valve control device includes a current gear ratio obtainer to obtain a current gear ratio as a ratio of an output revolutions number of a driver and an output revolutions number of a transmission, a current electric current value obtainer to obtain a current electric current value as a value of an electric current to be inputted to a first electromagnetic valve or a second electromagnetic valve, and a switching controller to, based on the current electric current value and a gear ratio difference as a difference between a target gear ratio and the current gear ratio, perform electromagnetic valve switching control to switch between use of the first electromagnetic valve to control a pump swash plate and use of the second electromagnetic valve to control the pump swash plate.Type: ApplicationFiled: October 12, 2023Publication date: May 23, 2024Inventors: Tetsuo YAMAGUCHI, Ryoma IWASE
-
Publication number: 20240167565Abstract: An electromagnetic valve control device includes a control signal generator to, through feedback control involving an environmental coefficient, generate a control signal intended for at least one electromagnetic valve and corresponding to a target electric current value, a coefficient determiner to determine an environmental coefficient during a learning period from a start of a driver operation to an end of a predetermined time, and an operation limiter to limit respective operations of the at least one electromagnetic valve and a gear transmission during the learning period.Type: ApplicationFiled: October 16, 2023Publication date: May 23, 2024Inventors: Tetsuo YAMAGUCHI, Ryoma IWASE
-
Publication number: 20240167550Abstract: A continuously variable powertrain device for a work vehicle includes a hydraulic static transmission to output a continuously shifted motive power while continuously varying a velocity of a motive power received from an engine, a planetary transmission to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power, a pressure detector to detect a hydraulic pressure in a closed circuit of the hydraulic static transmission, a planetary clutch mechanism to switch a shift level of the planetary transmission, and a powertrain controller to control actuation of the hydraulic static transmission and the planetary transmission based on a shift command.Type: ApplicationFiled: November 7, 2023Publication date: May 23, 2024Inventors: Tetsuo YAMAGUCHI, Ryoma IWASE
-
Publication number: 20230398107Abstract: The present invention provides a pharmaceutical composition for treating or preventing a disease caused in the vagina or perivaginal area by a pathogenic virus. The composition contains, as an active ingredient, a compound of an aniline derivative represented by the following formula (I): where W represents S or O, a pharmaceutically acceptable salt thereof, and a hydrate thereof. The pharmaceutical composition is in the form of a vaginal insert (e.g., a vaginal tablet, a vaginal capsule, or a vaginal suppository) containing a granular preparation, which includes core particles and a coating layer covering the core particles. The core particles contain the compound, needle-like and/or approximately column-like-shaped crystalline cellulose, a pharmaceutically acceptable approximately spherical shaped additive, and a nonionic surfactant. The granular preparation is characterized in that, in the core particles, voids are present between the crystalline cellulose and the additive.Type: ApplicationFiled: February 19, 2021Publication date: December 14, 2023Applicant: KINOPHARMA, INC.Inventors: Hiroshi ONOGI, Tetsuo YAMAGUCHI, Katsuhiko SATO
-
Patent number: 11746099Abstract: The present invention provides a process for preparing a compound represented by formula (VII), which comprises reacting a compound represented by formula (VI) with a malonic acid derivative in the presence of a base and an asymmetric catalyst in a two layer solvent system of hydrophobic solvent and water, (wherein R2 and R3 each independently represents a protecting group for carboxyl group).Type: GrantFiled: June 10, 2021Date of Patent: September 5, 2023Assignee: MITSUBISHI TANABE PHARMA CORPORATIONInventors: Takao Teshima, Takafumi Yamagami, Tetsuo Yamaguchi, Junki Ando
-
Patent number: 11730074Abstract: A work vehicle includes a lifting mechanism to control at least one of a height and a posture of a work machine connected to the work vehicle. The lifting mechanism is able to control at least one of the height and the posture by using a hydraulic drive. The work vehicle includes an oil-temperature acquirer to acquire an oil temperature to be used for the hydraulic drive, a maximum oil amount setter to set a maximum oil amount according to the oil temperature acquired by the oil-temperature acquirer, the maximum oil amount being a maximum value of a supply amount of oil used to drive the hydraulic drive, and a hydraulic drive controller to control the hydraulic drive below the maximum oil amount set by the maximum oil amount setter.Type: GrantFiled: February 11, 2021Date of Patent: August 22, 2023Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Takudai Matsuda
-
Patent number: 11536356Abstract: A work vehicle includes an engine, a speed changing apparatus that includes a hydrostatic stepless speed changing mechanism and is configured to subject motive power transmitted from the engine to speed changing and output the motive power, a travelling apparatus configured to travel on the motive power received from the speed changing apparatus, a speed detector configured to detect a speed of the travelling apparatus, a pressure detector configured to detect a hydraulic pressure in a closed circuit of the hydrostatic stepless speed changing mechanism, and a controller.Type: GrantFiled: October 29, 2021Date of Patent: December 27, 2022Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Ryoma Iwase, Komei Yamawaki
-
Patent number: 11388853Abstract: A vehicle includes; a vehicle body on which the motor is mounted; an apparatus provided to the traveling vehicle body and also driven by drive power from the motor; an apparatus that performs work on a field; an apparatus that changes the speed of drive power input from the motor and transmits the drive power; a tool that includes speed change stages and is also capable of speed change operation of the speed change apparatus by human operation; a controller that, when the number of speed change stages is changed based on human operation of the speed change operation tool, outputs to the speed change apparatus a speed change command for each predefined number of stages and is also capable of outputting the speed change command for each defined speed change interval; and an operation mechanism that enables adjustment of the speed change interval.Type: GrantFiled: May 17, 2019Date of Patent: July 19, 2022Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Yoshihiko Kuroshita, Hitoshi Azuma, Michita Kono, Shinji Ohara
-
Publication number: 20220211688Abstract: Disclosed is a pharmaceutical preparation in the form of granules having nuclear particles and a coating layer coating the nuclear particles, wherein the nuclear particles are composed of a drug, a first nuclear-particle component, a second nuclear-particle component and a surfactant; the drug is an aniline derivative represented by the following general formula (I): wherein W represents S or O, or a pharmaceutically acceptable salt thereof, or a hydrate thereof; the first nuclear-particle component is at least one crystalline cellulose having a shape selected from a needle-shape and a substantially columnar shape; and the second nuclear-particle component is at least one pharmaceutically acceptable additive having a substantially spherical shape. The pharmaceutical preparation can contain a therapeutically effective amount of a poorly water-soluble drug (CDK9 inhibitor) and has excellent flowability sufficient for practical production.Type: ApplicationFiled: April 24, 2020Publication date: July 7, 2022Applicants: Fuji Pharma Co., Ltd., KinoPharma, Inc.Inventors: Toshiyuki INADA, Takaki SHIMODAIRA, Ryosei KANAYAMA, Hiroshi ONOGI, Tetsuo YAMAGUCHI
-
Publication number: 20220196128Abstract: A work vehicle includes an engine, a speed changing apparatus that includes a hydrostatic stepless speed changing mechanism and is configured to subject motive power transmitted from the engine to speed changing and output the motive power, a travelling apparatus configured to travel on the motive power received from the speed changing apparatus, a speed detector configured to detect a speed of the travelling apparatus, a pressure detector configured to detect a hydraulic pressure in a closed circuit of the hydrostatic stepless speed changing mechanism, and a controller.Type: ApplicationFiled: October 29, 2021Publication date: June 23, 2022Applicant: KUBOTA CORPORATIONInventors: Tetsuo YAMAGUCHI, Ryoma IWASE, Komei YAMAWAKI
-
Publication number: 20220119364Abstract: The present invention provides a process for preparing a compound represented by formula (VII), which comprises reacting a compound represented by formula (VI) with a malonic acid derivative in the presence of a base and an asymmetric catalyst in a two layer solvent system of hydrophobic solvent and water.Type: ApplicationFiled: June 10, 2021Publication date: April 21, 2022Applicant: MITSUBISHI TANABE PHARMA CORPORATIONInventors: Takao TESHIMA, Takafumi YAMAGAMI, Tetsuo YAMAGUCHI, Junki ANDO