Patents by Inventor Yukihiko Yamada

Yukihiko Yamada 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: 11065025
    Abstract: A probe configured to be connected to a transducer unit configured to generate ultrasonic vibration, includes an elongated vibration transmission portion configured to transmit the ultrasonic vibration; and an engagement member provided on and/or near an outer circumference at a position which becomes a node of the ultrasonic vibration when the ultrasonic vibration is transmitted to the vibration transmission portion, the engagement member being formed by a material of an identical to or smaller damping rate than a damping rate of the ultrasonic vibration in the vibration transmission portion, and the engagement member being engaged with an exterior member disposed on an outer side of the vibration transmission portion.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: July 20, 2021
    Assignee: OLYMPUS CORPORATION
    Inventors: Yukihiko Shimamura, Masashi Yamada, Hideyuki Komamura, Tomokazu Shimizu
  • Patent number: 10384658
    Abstract: An estimated time-to-collision (TTC) calculation apparatus includes a distance acquisition unit, relative velocity acquisition unit, relative acceleration acquisition unit, and estimated TTC calculation unit. The distance acquisition unit acquires a distance X between the own vehicle and an object. The relative velocity acquisition unit acquires a relative velocity V of the object with respect to the own vehicle. The relative acceleration acquisition unit acquires a relative acceleration ? of the object with respect to the own vehicle. The estimated TTC calculation unit calculates an estimated TTC t until the own vehicle collides with the object. In this apparatus and method, the estimated TTC calculation unit calculates t, based on the distance X and the relative velocity V, when the own vehicle is accelerating, and when the own vehicle is decelerating, calculates t based on the distance X, the relative velocity V, and the relative acceleration ?.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: August 20, 2019
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yosuke Ito, Yukihiko Yamada, Akitoshi Minemura, Jun Tsuchida, Masayuki Shimizu
  • Patent number: 9789817
    Abstract: A warning control apparatus includes a learning section that learns a collision avoidance timing at which a driver of an own vehicle starts to perform an operation for avoiding collision with a front object based on a distance to this object and a speed of the own vehicle, a threshold setting section that determines whether the driver tends to start a collision avoidance operation early or late based on the learned collision avoidance timing, sets an avoidance warning threshold larger than a basic threshold upon determining that the vehicle driver tends to start the collision avoidance operation early, and sets the avoidance warning threshold smaller than the basic threshold in the contrary case, and a warning control section that causes a warning device to issue a warning at a warning timing set so as to become early as the avoidance warning threshold set by the threshold setting section becomes large.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: October 17, 2017
    Assignee: DENSO CORPORATION
    Inventor: Yukihiko Yamada
  • Publication number: 20170210360
    Abstract: An estimated time-to-collision (TTC) calculation apparatus includes a distance acquisition unit, relative velocity acquisition unit, relative acceleration acquisition unit, and estimated TTC calculation unit. The distance acquisition unit acquires a distance X between the own vehicle and an object. The relative velocity acquisition unit acquires a relative velocity V of the object with respect to the own vehicle. The relative acceleration acquisition unit acquires a relative acceleration ? of the object with respect to the own vehicle. The estimated TTC calculation unit calculates an estimated TTC t until the own vehicle collides with the object. In this apparatus and method, the estimated TTC calculation unit calculates t, based on the distance X and the relative velocity V, when the own vehicle is accelerating, and when the own vehicle is decelerating, calculates t based on the distance X, the relative velocity V, and the relative acceleration ?.
    Type: Application
    Filed: August 3, 2015
    Publication date: July 27, 2017
    Inventors: Yosuke Ito, Yukihiko Yamada, Akitoshi Minemura, Jun Tsuchida, Masayuki Shimizu
  • Publication number: 20170181494
    Abstract: [Problem] To provide a sports inner boot that ensures removal from a sports outer boot to allow an inside to be easily washed and where a drying time be a comparatively short time. [Solution] A sports inner boot made of a thermoplastic plastic includes a bottom plate 10 disposed in the sports outer boot and a foot wrap portion 20 formed at the bottom plate 10. The bottom plate 10 and the foot wrap portion 20 are integrally formed. The bottom plate 10 and the foot wrap portion 20 contain an ethylene vinyl acetate copolymer material (EVA).
    Type: Application
    Filed: August 24, 2015
    Publication date: June 29, 2017
    Applicant: HOOD INC.
    Inventor: Yukihiko YAMADA
  • Publication number: 20160347249
    Abstract: A warning control apparatus includes a learning section that learns a collision avoidance timing at which a driver of an own vehicle starts to perform an operation for avoiding collision with a front object based on a distance to this object and a speed of the own vehicle, a threshold setting section that determines whether the driver tends to start a collision avoidance operation early or late based on the learned collision avoidance timing, sets an avoidance warning threshold larger than a basic threshold upon determining that the vehicle driver tends to start the collision avoidance operation early, and sets the avoidance warning threshold smaller than the basic threshold in the contrary case, and a warning control section that causes a warning device to issue a warning at a warning timing set so as to become early as the avoidance warning threshold set by the threshold setting section becomes large.
    Type: Application
    Filed: May 24, 2016
    Publication date: December 1, 2016
    Inventor: Yukihiko Yamada
  • Patent number: 9333636
    Abstract: A work machine includes a main pole internally including a rotation shaft, a tool unit located at one end of the main pole, and a power unit located at another end of the main pole. The main pole includes a first partial pole, a second partial pole and a joint member that joints them to each other. The first partial pole includes a positioning member. The joint member includes a positioning hole configured to engage with the positioning member and a guide groove extending from the positioning hole. The guide groove is configured to guide the positioning member to the positioning hole and to allow the positioning member to escape in at least a section thereof.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: May 10, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Yukihiko Yamada, Shinya Kojima, Akihiro Nomura
  • Patent number: 9035596
    Abstract: A battery device that functions as a power source of a tool main body and is attachable to a body of a user may include a battery housing that is capable of removably receiving at least one rechargeable battery and capable of being electrically connected to the at least one battery, an adaptor that is capable of being electrically connected to the tool main body, and a cable electrically connecting the battery housing and the adaptor. The battery housing comprises a housing body that is constructed to be attached to the body of the user and is capable of receiving the at least one battery therein, and a cover member that is openably and closably attached to the housing body. The housing body and the at least one battery are connected to each other via a male-female engagement device. The male-female engagement device has an engagement release portion that is positioned so as to be exposed when the cover member is opened relative to the housing body.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: May 19, 2015
    Assignee: MAKITA CORPORATION
    Inventors: Yuichi Sugiura, Hideki Abe, Tomohiro Hachisuka, Yukihiko Yamada
  • Patent number: 9010107
    Abstract: An electric motor is controlled based on an operation of a brake pedal to move a primary piston forward through a ball screw mechanism, thereby generating a hydraulic pressure in a master cylinder. At this time, a reaction force from the hydraulic pressure in the master cylinder is fed back to the brake pedal through an input piston. Automatic brake control, which generates the hydraulic pressure by driving the electric motor regardless of whether there is the operation of the brake pedal, is carried out. During the automatic brake control, an actual relative position is compared with a determination threshold value set based on the relative position between the primary piston and the input piston which is generated by a movement of the primary piston, and it is determined that the brake pedal is operated in a case where the relative position is smaller than the determination threshold value.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: April 21, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yukihiko Yamada, Kentaro Ueno, Yusuke Nozawa, Daisuke Kojima, Tohma Yamaguchi
  • Patent number: 8632136
    Abstract: A brake control system displaces a primary piston by controlling an operation of the electric motor by a master pressure control unit according to the operation amount (Xop) of the brake pedal, thereby generating a hydraulic pressure in the master cylinder to supply it to wheel cylinders (Ba to Bd). The master pressure control unit sets a target relative displacement (?XT) between an input piston and the primary piston and a target hydraulic pressure (PT) in the master cylinder, and appropriately switch which is used to control a brake force. During regenerative cooperation, the master pressure control unit selects the control with use of the target hydraulic pressure, which enables easy execution of a hydraulic pressure control including a subtraction of the hydraulic pressure corresponding to a brake effect from the regenerative cooperation.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: January 21, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yusuke Nozawa, Tohma Yamaguchi, Kentaro Ueno, Yukihiko Yamada, Daisuke Kojima
  • Publication number: 20130075122
    Abstract: A work machine includes a main pole internally including a rotation shaft, a tool unit located at one end of the main pole, and a power unit located at another end of the main pole. The main pole includes a first partial pole, a second partial pole and a joint member that joints them to each other. The first partial pole includes a positioning member. The joint member includes a positioning hole configured to engage with the positioning member and a guide groove extending from the positioning hole. The guide groove is configured to guide the positioning member to the positioning hole and to allow the positioning member to escape in at least a section thereof.
    Type: Application
    Filed: May 26, 2011
    Publication date: March 28, 2013
    Applicant: MAKITA CORPORATION
    Inventors: Yukihiko Yamada, Shinya Kojima, Akihiro Nomura
  • Publication number: 20130025273
    Abstract: Provided is an electric booster, including: an input member moved forward and backward by an operation of a brake pedal; a boosting member provided so as to be movable relative to the input member; an electric actuator for driving the boosting member; and a controller for controlling actuation of the electric actuator based on the movement of the input member, in which the controller executes changing control for changing a ratio of a movement amount of the boosting member to a movement amount of the input member to a smaller ratio before an output of the electric actuator increases to come into a full-load state in which the output of the electric actuator becomes equal to a maximum output by the forward movement of the input member.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 31, 2013
    Inventors: Yusuke NOZAWA, Tohma Yamaguchi, Kentarou Ueno, Yukihiko Yamada, Daisuke Kojima
  • Publication number: 20120102941
    Abstract: An electric motor is controlled based on an operation of a brake pedal to move a primary piston forward through a ball screw mechanism, thereby generating a hydraulic pressure in a master cylinder. At this time, a reaction force from the hydraulic pressure in the master cylinder is fed back to the brake pedal through an input piston. Automatic brake control, which generates the hydraulic pressure by driving the electric motor regardless of whether there is the operation of the brake pedal, is carried out. During the automatic brake control, an actual relative position is compared with a determination threshold value set based on the relative position between the primary piston and the input piston which is generated by a movement of the primary piston, and it is determined that the brake pedal is operated in a case where the relative position is smaller than the determination threshold value.
    Type: Application
    Filed: September 22, 2011
    Publication date: May 3, 2012
    Inventors: Yukihiko YAMADA, Kentaro UENO, Yusuke NOZAWA, Daisuke KOJIMA, Tohma YAMAGUCHI
  • Publication number: 20120102940
    Abstract: A brake apparatus capable of preventing generation of an unintended brake force. The brake apparatus includes an input member configured to be moved forward and backward by an operation of a brake pedal, a stroke detector for detecting an operation stroke of the input member, and a controller for controlling an actuator based on a detection result of the stroke detector. When the controller is set into the controllable state, the controller sets a stored initial base position as a control base position of the stroke detector to control the actuator based on the detection value of the stroke detector, and each time the input member is moved backward beyond the control base position, the controller updates the control base position of the stroke detector to a position of the input member at that time.
    Type: Application
    Filed: September 21, 2011
    Publication date: May 3, 2012
    Inventors: Kentaro Ueno, Yusuke Nozawa, Yukihiko Yamada, Daisuke Kojima, Tohma Yamaguchi
  • Publication number: 20120052356
    Abstract: A battery device that functions as a power source of a tool main body and is attachable to a body of a user may include a battery housing that is capable of removably receiving at least one rechargeable battery and capable of being electrically connected to the at least one battery, an adaptor that is capable of being electrically connected to the tool main body, and a cable electrically connecting the battery housing and the adaptor. The battery housing comprises a housing body that is constructed to be attached to the body of the user and is capable of receiving the at least one battery therein, and a cover member that is openably and closably attached to the housing body. The housing body and the at least one battery are connected to each other via a male-female engagement device. The male-female engagement device has an engagement release portion that is positioned so as to be exposed when the cover member is opened relative to the housing body.
    Type: Application
    Filed: August 19, 2011
    Publication date: March 1, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Yuichi SUGIURA, Hideki ABE, Tomohiro HACHISUKA, Yukihiko YAMADA
  • Publication number: 20110241418
    Abstract: An object of the present invention is to simplify a control during regenerative cooperation in a brake control system generating a hydraulic pressure in a master cylinder by displacing a piston with use of an electric actuator according an operation amount of a brake pedal. The brake control system displaces the primary piston 8 by controlling an operation of the electric motor 22 by a master pressure control unit 4 according to the operation amount Xop of the brake pedal 19, thereby generating a hydraulic pressure in the master cylinder 2 to supply it to wheel cylinders Ba to Bd. The master pressure control unit 4 sets a target relative displacement ?XT between an input piston 17 and the primary piston 8 and a target hydraulic pressure PT in the master cylinder 2, and appropriately switch which is used to control a brake force.
    Type: Application
    Filed: March 21, 2011
    Publication date: October 6, 2011
    Inventors: Yusuke NOZAWA, Tohma Yamaguchi, Kentaro Ueno, Yukihiko Yamada, Daisuke Kojima
  • Publication number: 20100275593
    Abstract: There is provided a brake system that can generate a desired braking force in a nondefective system even if at least a secondary side system of a tandem master cylinder is defective. When the secondary side system is defective, a primary piston (assist member) is moved by a larger amount than an amount of movement of an input piston (input member). Pressure in the nondefective primary side system is increased, and this can compensate for a braking force for two wheels on the primary side, which may be reduced by the defect in the secondary side if no measure is taken, and allows a desired braking force to be generated. Further, the pressure in the primary side system is increased to apply hydraulic pressure reaction to the input piston and an input rod (input member), thereby achieving good pedal feeling.
    Type: Application
    Filed: March 24, 2010
    Publication date: November 4, 2010
    Inventors: Satoru Okada, Yukihiko Yamada
  • Patent number: 7823483
    Abstract: A working depth adjusting device includes an adjusting member, an intermediate member and an operation member. The adjusting member is supported on the front portion of the tool body and movable along the axis of the spindle, so that the position of the adjusting member can be adjusted relative to the tool bit with respect to a working depth direction. The intermediate member is rotatably supported on the adjusting member. The adjusting member moves in the working depth direction as the inmate member rotates. The operation member is operable to rotate relative to the intermediate member between a lock position and an unlock position. The intermediate member has a first engaging member. When the operation member is rotated to the lock position, the first engaging member engages the tool body, and the engagement of the first engaging member is maintained by the operation member, so that the working depth adjusting device can be prevented from being removed from the tool body.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: November 2, 2010
    Assignee: Makita Corporation
    Inventor: Yukihiko Yamada
  • Patent number: 7669507
    Abstract: It is an object of the present invention to provide a technique for appropriately providing not only for normal rotation but for reverse rotation in a tightening tool having a clutch. Representative tightening tool according to the invention comprises a body, a driving motor housed in the body, a driving-side clutch element, an auxiliary clutch element, a driven-side clutch element, a driven shaft and a tool bit. During normal rotation of the driving motor, the driven-side clutch element is caused to move in the axial direction by application of a pressing force of the user to the body to engage with the driving-side clutch element. During reverse rotation of the driving motor, the driving-side clutch element and the auxiliary clutch element are caused to move relatively with respect to each other in the axial direction by rotating torque of the driving-side clutch element and the driving-side clutch element or the auxiliary clutch element engages with the driven-side clutch element.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: March 2, 2010
    Assignee: Makita Corporation
    Inventors: Masanori Furusawa, Yoshinori Shibata, Yukihiko Yamada
  • Publication number: 20080231109
    Abstract: An object of the present invention is to provide a brake apparatus in which a hydraulic pressure in a master cylinder is prevented from being increasingly varied while an anti-lock brake system is in operation, and therefore a pedal feeling can be improved. The brake apparatus comprises an electric booster including an input member which moves forward or backward in response to an operation of a brake pedal, an assist member which moves forward or backward by being driven by an electric actuator using an electric motor as its driving source. The electric booster generates a boosted brake hydraulic pressure in the master cylinder under an input thrust provided to the input member through the brake pedal and an assist thrust provided to the assist member by the electric actuator.
    Type: Application
    Filed: February 21, 2008
    Publication date: September 25, 2008
    Inventors: Yukihiko Yamada, Tohma Yamaguchi, Takuya Obata, Hirotaka Oikawa