Patents by Inventor Kenji Sawa

Kenji Sawa 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: 11441680
    Abstract: A control device for an automatic transmission includes a parking lock mechanism configured to lock/unlock rotation of a power transmission shaft by setting a parking rod at locked/unlocked position when the automatic transmission is in a parking range or in other ranges, a parking drive mechanism configured to set the parking rod at the unlocked position by supplying hydraulic pressure, a hydraulic pressure control valve configured to intercept the hydraulic pressure supply to the parking drive mechanism when power is supplied thereto, and supply the pressure when power is not supplied thereto, a regulating mechanism configured to regulate the movement of the parking rod at the locked position, and a controller configured to, when the parking rod is at the locked position, maintain supply of power to the valve, while an engine speed is higher than a given value, after power of a vehicle is turned OFF.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: September 13, 2022
    Assignee: Mazda Motor Corporation
    Inventors: Takahiro Kimura, Kenji Sawa, Yasuo Shigenaka
  • Publication number: 20210148464
    Abstract: A control device for an automatic transmission includes a parking lock mechanism configured to lock/unlock rotation of a power transmission shaft by setting a parking rod at locked/unlocked position when the automatic transmission is in a parking range or in other ranges, a parking drive mechanism configured to set the parking rod at the unlocked position by supplying hydraulic pressure, a hydraulic pressure control valve configured to intercept the hydraulic pressure supply to the parking drive mechanism when power is supplied thereto, and supply the pressure when power is not supplied thereto, a regulating mechanism configured to regulate the movement of the parking rod at the locked position, and a controller configured to, when the parking rod is at the locked position, maintain supply of power to the valve, while an engine speed is higher than a given value, after power of a vehicle is turned OFF.
    Type: Application
    Filed: October 16, 2020
    Publication date: May 20, 2021
    Inventors: Takahiro Kimura, Kenji Sawa, Yasuo Shigenaka
  • Patent number: 10415695
    Abstract: A range determination device is applied to an automatic transmission provided with an input portion, an output portion, and a range switching mechanism which transmits rotation of the input portion to the output portion, and which is operative to switch the range of the automatic transmission between a forward range and a reverse range, in which directions of transmitting rotation from the input portion to the output portion are different from each other. The range determination device includes a rotational state detection unit which detects a rotational state of a predetermined rotary member included in the range switching mechanism, and a determination unit which determines that the forward range or the reverse range is attained on the basis of the rotational state of the rotary member detected by the rotational state detection unit.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 17, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kenji Sawa, Takahiro Kimura
  • Publication number: 20180066755
    Abstract: A shift position determination portion determines that operation of shifting a shift position from other range than a parking range to the parking range is conducted. A parking lock command portion causes a piston to maintain a state of being mechanically locked at a second position when the shift position is shifted to the parking range. An actuator drive command portion commands an actuator to drive the piston from the second position to a first position in a state where the position of the piston is mechanically locked at the second position. A parking lock failure determination portion determines that the locking mechanism portion is in a failure in an unlocked state when the position of the piston goes out of the second position within a predetermined time after a command is issued.
    Type: Application
    Filed: August 15, 2017
    Publication date: March 8, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Takahiro KIMURA, Yasuo SHIGENAKA, Kenji SAWA, Keitaro KAGEYAMA, Takashi ISHIYAMA, Masamichi FUJIKAWA
  • Publication number: 20170198807
    Abstract: A range determination device is applied to an automatic transmission provided with an input portion, an output portion, and a range switching mechanism which transmits rotation of the input portion to the output portion, and which is operative to switch the range of the automatic transmission between a forward range and a reverse range, in which directions of transmitting rotation from the input portion to the output portion are different from each other. The range determination device includes a rotational state detection unit which detects a rotational state of a predetermined rotary member included in the range switching mechanism, and a determination unit which determines that the forward range or the reverse range is attained on the basis of the rotational state of the rotary member detected by the rotational state detection unit.
    Type: Application
    Filed: December 21, 2016
    Publication date: July 13, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kenji SAWA, Takahiro KIMURA
  • Patent number: 9227012
    Abstract: The medical needle device includes: a shield 4 including a substantially cylindrical portion 4a; a tube 13; a first hub 2 that is inserted into an inner bore of the shield movably in an axial direction. The rear end of the first hub 2 is connected with the tube 3. A rigid needle 1 is fixed to a front end portion of the first hub; and a hub movement controlling member 14 that is attached to the shield detachably. The hub movement controlling member 14 includes: a stopper portion 14a that can be inserted from the rear end side of the shield into an inner bore of the shield exsertably.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: January 5, 2016
    Assignee: JMS Co., Ltd.
    Inventors: Ryoji Fujii, Kenji Sawa, Raita Uematsu
  • Patent number: 9046172
    Abstract: The present invention provides an automatic transmission control apparatus which comprises a first temperature detection device for detecting a temperature of hydraulic oil stored in an automatic transmission; an automatic transmission control device installed in a same casing as that in which the hydraulic oil is stored; a second temperature detection device for detecting a temperature of the automatic transmission control device; and a malfunction determination section for comparing the temperature of the automatic transmission control device detected by the second temperature detection device with the temperature of the hydraulic oil detected by the first temperature detection device to determine whether or not a malfunction occurs in the first temperature detection device.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: June 2, 2015
    Assignee: Mazda Motor Corporation
    Inventors: Akihiro Mitani, Keiichiro Sueshige, Yasuo Shigenaka, Daisuke Shishido, Yusuke Moriyama, Kenji Sawa
  • Publication number: 20130275016
    Abstract: The present invention provides an automatic transmission control apparatus which comprises a first temperature detection device for detecting a temperature of hydraulic oil stored in an automatic transmission; an automatic transmission control device installed in a same casing as that in which the hydraulic oil is stored; a second temperature detection device for detecting a temperature of the automatic transmission control device; and a malfunction determination section for comparing the temperature of the automatic transmission control device detected by the second temperature detection device with the temperature of the hydraulic oil detected by the first temperature detection device to determine whether or not a malfunction occurs in the first temperature detection device.
    Type: Application
    Filed: December 19, 2011
    Publication date: October 17, 2013
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Akihiro Mitani, Keiichiro Sueshige, Yasuo Shigenaka, Daisuke Shishido, Yusuke Moriyama, Kenji Sawa
  • Patent number: 7875009
    Abstract: A fluid control device is characterized in that the device is structured of a hollow first fluid path (21) and second fluid path (22), a housing portion (1) formed between the first fluid path and the second fluid path and having a hollow portion with a cross-sectional area larger than cross-sectional areas of both fluid paths, and a valve member (3) that has a main body (31) and a projection portion (32) that are installed in an opening portion where the first fluid path is connected to the hollow portion and that is formed of an elastic material. The fluid control device enables the circulation of liquid when the pressure of liquid flowing from the first fluid path toward the second fluid path is more than a predetermined level. The fluid control device enables accurate and safe measurement of pressure including blood pressure, and, when flushing operation of an infusion circuit etc.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: January 25, 2011
    Assignee: JMS Co., Ltd
    Inventors: Satoru Hashimoto, Ryoji Fujii, Kenji Sawa
  • Publication number: 20090018511
    Abstract: The medical needle device of the present invention includes: a shield 4 including a substantially cylindrical portion 4a; a tube 13; a first hub 2 that is inserted into an inner bore of the shield movably in an axial direction, whose rear end is connected with the tube 3; a rigid needle 1 that is fixed to a front end portion of the first hub; and a hub movement controlling member 14 that is attached to the shield detachably, wherein the hub movement controlling member 14 includes: a stopper portion 14a that can be inserted from the rear end side of the shield into an inner bore of the shield exsertably, and has a front end that can be in contact with the first hub in a state of reaching a movement end on the front end side of the inner bore of the shield; and a holding portion that can maintain a state where a front end of the stopper portion 14a is in contact with the first hub 2 reaching the movement end on the front end side.
    Type: Application
    Filed: January 19, 2007
    Publication date: January 15, 2009
    Applicant: JMS CO., LTD.
    Inventors: Ryoji Fujii, Kenji Sawa, Raita Uematsu
  • Publication number: 20080103436
    Abstract: A fluid control device is characterized in that the device is structured of a hollow first fluid path (21) and second fluid path (22), a housing portion (1) formed between the first fluid path and the second fluid path and having a hollow portion with a cross-sectional area larger than cross-sectional areas of both fluid paths, and a valve member (3) that has a main body (31) and a projection portion (32) that are installed in an opening portion where the first fluid path is connected to the hollow portion and that is formed of an elastic material. The fluid control device enables the circulation of liquid when the pressure of liquid flowing from the first fluid path toward the second fluid path is more than a predetermined level. The fluid control device enables accurate and safe measurement of pressure including blood pressure, and, when flushing operation of an infusion circuit etc.
    Type: Application
    Filed: December 18, 2007
    Publication date: May 1, 2008
    Applicant: JMS CO., LTD
    Inventors: Satoru Hashimoto, Ryoji Fujii, Kenji Sawa
  • Patent number: 7326187
    Abstract: A fluid control device is characterized in that the device is structured of a hollow first fluid path (21) and second fluid path (22), a housing portion (1) formed between the first fluid path and the second fluid path and having a hollow portion with a cross-sectional area larger than cross-sectional areas of both fluid paths, and a valve member (3) that has a main body (31) and a projection portion (32) that are installed in an opening portion where the first fluid path is connected to the hollow portion and that is formed of an elastic material. The fluid control device enables the circulation of liquid when the pressure of liquid flowing from the first fluid path toward the second fluid path is more than a predetermined level. The fluid control device enables accurate and safe measurement of pressure including blood pressure, and, when flushing operation of an infusion circuit etc.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: February 5, 2008
    Assignees: JMS Co., Ltd., Satoru Hashimoto
    Inventors: Satoru Hashimoto, Ryoji Fujii, Kenji Sawa
  • Publication number: 20060155248
    Abstract: A fluid control device is characterized in that the device is structured of a hollow first fluid path (21) and second fluid path (22), a housing portion (1) formed between the first fluid path and the second fluid path and having a hollow portion with a cross-sectional area larger than cross-sectional areas of both fluid paths, and a valve member (3) that has a main body (31) and a projection portion (32) that are installed in an opening portion where the first fluid path is connected to the hollow portion and that is formed of an elastic material. The fluid control device enables the circulation of liquid when the pressure of liquid flowing from the first fluid path toward the second fluid path is more than a predetermined level. The fluid control device enables accurate and safe measurement of pressure including blood pressure, and, when flushing operation of an infusion circuit etc.
    Type: Application
    Filed: August 5, 2003
    Publication date: July 13, 2006
    Applicants: JMS Co., Ltd.
    Inventors: Satoru Hashimoto, Ryoji Fujii, Kenji Sawa
  • Publication number: 20020079258
    Abstract: Components for composing an infusion line are classified into unit groups including a spike unit, a main tube unit, an injection device unit, an infusion filter unit, and a one-way valve unit. Plural kinds of units are provided for each unit group, each unit being formed of one or more components. A combination of the unit groups is determined by allowing the spike unit and the main tube unit to be indispensable and selecting at least one of the unit groups from the remaining unit groups. An arrangement of the selected unit groups is determined, with the spike unit being positioned at one end. At least one kind of the units is selected from each of the unit group based on the combination. The selected units are combined, with the end on the distal side relative to the spike unit being composed of a connector used for a connection to a member for access to a patient.
    Type: Application
    Filed: December 24, 2001
    Publication date: June 27, 2002
    Applicant: JMS Co., Ltd.
    Inventor: Kenji Sawa
  • Patent number: 6371886
    Abstract: There is provided temporary high-speed gear setting means which causes an automatic transmission to accomplish first-speed gear after it has once been set to second speed gear, for instance, which is selected as a specific high-speed gear upon switching from a non-drive range to the drive range. While it is made possible to manually switch between gear-shifting control operation in automatic mode performed according to preset shifting characteristics and manual mode in which gear-shifting operation is manually performed by a driver, priority is given to accomplishment of the first-speed gear the temporary high-speed gear setting means when the automatic transmission is switched to the manual mode while it is set to the aforementioned specific high-speed gear by the aforementioned temporary high-speed gear setting means.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: April 16, 2002
    Assignee: Mazda Motor Corporation
    Inventors: Kenji Sawa, Mitsutoshi Abe, Yoshinori Fukumoto
  • Patent number: 6309324
    Abstract: An automatic transmission control system provided with a speed sensor for monitoring an input speed to the automatic transmission, on one hand, prohibits gear shifts only to gears which are provided by alternately locking and unlocking two friction coupling elements at a timing determined essentially based on an input speed when an failure of the speed sensor occurs and, on the other hand, permits gear shifts to gears which are provided in participation of the one-way clutch by alternately locking and unlocking the two friction coupling elements, a timely alternate lock and unlock operation of the two friction coupling elements being spontaneously caused by the unlock operation of one of the two friction coupling elements and gear shifts to gears which are provided by locking one of the two friction coupling elements and unlocking the other with common pressure or unlocking one of the two friction coupling elements and locking the other with common pressure.
    Type: Grant
    Filed: November 26, 1999
    Date of Patent: October 30, 2001
    Assignee: Mazda Motor Corporation
    Inventors: Kenji Sawa, Shinya Kamada
  • Patent number: 6125316
    Abstract: A gear shift failure of an automatic transmission to a wrong gear other than an indented gear is made by estimating slippage theoretically caused in a torque converter on the basis of an engine speed and a turbine speed theoretically determined for an intended gear according to the vehicle speed and comparing the estimating slippage with predetermined reference slippage. When the estimated slippage exceeds the predetermined threshold slippage, it is decided that there has occurred a wrong shift to a gear other than the intended gear.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: September 26, 2000
    Assignee: Mazda Motor Corporation
    Inventors: Kazuo Sasaki, Kenji Sawa
  • Patent number: 6024671
    Abstract: An apparatus for controlling an automatic transmission is disclosed. A 2nd speed is established in which hydraulic pressure is supplied only into an engaging chamber of a 2-4 brake by a first duty solenoid valve so that the brake is applied. A 3rd speed is established in which the hydraulic pressure is supplied into a releasing chamber of the brake and a hydraulic chamber of a 3-4 clutch by a second duty solenoid valve under the condition of the hydraulic pressure being supplied into the engaging chamber of the brake so that the brake is released and the 3-4 clutch is engaged. When the 2nd speed is changed to the 3rd speed, a controller increases the hydraulic pressure supplied into the releasing chamber of the brake and the hydraulic chamber of the 3-4 clutch in a case where a failure, in which the first solenoid valve is fixed under a condition that the first solenoid valve supplies the hydraulic pressure into the engaging chamber, is detected.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: February 15, 2000
    Assignee: Mazda Motor Corporation
    Inventors: Kenji Sawa, Shinya Kamada
  • Patent number: 5980426
    Abstract: An automatic transmission control system for an automotive automatic transmission including a speed sensor for detecting a vehicle speed of the vehicle, a load sensor for detecting a load acting on the driving torque generator, a torque sensor for detecting input torque transmitted to the automatic transmission from the driving torque generator, first working fluid pressure control communicating both a first friction coupling element's unlocking pressure chamber and a second friction coupling element's pressure chamber with the working fluid source in the hydraulic pressure control system for controlling supply of working fluid pressure to and from both the unlocking pressure chambers and a second working fluid pressure control in the fluid path communicating both the first friction coupling element's locking pressure chamber with the working fluid source for controlling supply of working fluid pressure to and from the first friction coupling element's locking pressure chamber.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: November 9, 1999
    Assignee: Mazda Motor Corporation
    Inventors: Shinya Kamada, Shigeru Nagayama, Shin Nakano, Kenji Sawa
  • Patent number: 5919114
    Abstract: An automatic transmission control system for an automatic transmission including a hydraulic pressure control circuit which supplies locking and unlocking pressures selectively to a plurality of friction coupling elements to lock and unlock the selected friction coupling elements, changing a torque transmission path in a transmission gear mechanism to provide available gears, a specific one of which is achieved by locking and unlocking simultaneously specific friction coupling elements.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: July 6, 1999
    Assignee: Mazda Motor Corporation
    Inventors: Shinya Kamada, Shigeru Nagayama, Shin Nakano, Kenji Sawa