Patents Assigned to Showa Corporation
  • Publication number: 20200283111
    Abstract: A piston structure body includes: a piston that includes a through hole, an inner circumferential portion, and an outer circumferential portion, the through hole being a hole that is formed to penetrate the piston axially through a center of a first face that is an end face on one end side in an axial direction, the inner circumferential portion defining the through hole and connected to the first face, the outer circumferential portion disposed to surround the inner circumferential portion and connected to the first face; and a piston rod that is inserted through the through hole. A first end face that is an end face of the inner circumferential portion on a back face side of the first face is positioned more closely to the first face than a second end face that is an end face of the outer circumferential portion on the back face side.
    Type: Application
    Filed: September 13, 2019
    Publication date: September 10, 2020
    Applicant: Showa Corporation
    Inventors: Hayato TSUTSUI, Nobuaki TANAKA
  • Publication number: 20200248769
    Abstract: An outboard engine lifting/lowering device includes: a bracket which is to be rotatably provided to a hull and which is to be fixed to a propulsion device; and a rod unit which includes a tilt rod and a trim rod that are configured to rotate the propulsion device and the bracket. The bracket is provided with a receiving part configured to receive a tip end of the trim rod, and the receiving part includes: a buffer member made of a resin or rubber; and a contact member made of metal, which is provided on a surface of the buffer member at a side at which the trim rod is arranged, and which is in contact with the tip end of the trim rod.
    Type: Application
    Filed: May 23, 2019
    Publication date: August 6, 2020
    Applicant: Showa Corporation
    Inventor: Genki YANAGIDATE
  • Patent number: 10731646
    Abstract: An embodiment provides a vane pump device including a pump unit that includes a high pressure side discharge through-hole which discharges oil, and a low pressure side discharge through-hole which discharges oil; and a housing which accommodates the pump unit, and includes a high pressure side discharge passage that is formed between the high pressure side discharge through-hole and a high pressure side discharge outlet through which oil discharged from the high pressure side discharge through-hole of the pump unit is discharged to the outside, and a cover low pressure side discharge passage and a case low pressure side discharge passage that are formed between the low pressure side discharge through-hole and a low pressure side discharge outlet through which oil is discharged to the outside, and that are shorter than the high pressure side discharge passage.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 4, 2020
    Assignee: Showa Corporation
    Inventor: Toshio Nishikawa
  • Publication number: 20200231204
    Abstract: Assist torque or reaction force torque with little unnatural feeling to a driver is applied. An ECU includes: a control amount calculation section that calculates a control amount for controlling magnitude of the assist torque or the reaction force torque with reference to steering torque applied to a steering member; and a control amount correction section that corrects the control amount calculated by the control amount calculation section with reference to a lateral G of a vehicle body, a steering angle of the steering member, and a steering angle speed of the steering member.
    Type: Application
    Filed: April 9, 2020
    Publication date: July 23, 2020
    Applicant: Showa Corporation
    Inventors: Ken ISSHIKI, Eishi ISHIMARU, Kyouichi TAGAMI, Nobuyuki ENOMOTO
  • Patent number: 10711781
    Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction, and supplies oil to the columnar grooves. An outer-plate low pressure side through-hole and an outer-plate low pressure side recess portion are provided in an end surface of an outer plate along the rotation direction, and supply oil to the columnar grooves at a position facing the inner-plate low pressure side recess portion. An opening area of the inner-plate low pressure side recess portion is equal to a sum of opening areas of the outer-plate low pressure side through-hole and the outer-plate low pressure side recess portion.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: July 14, 2020
    Assignee: SHOWA CORPORATION
    Inventor: Toshio Nishikawa
  • Publication number: 20200216139
    Abstract: A vehicle height adjustment device includes a rear suspension, an electromagnetic valve control unit, and a weight estimation unit. The rear suspension includes a support member. The electromagnetic valve control unit determines a target movement based on an interrelation between the target movement and a weight applied to a vehicle, under which the target movement is set to an upper limit when the weight is larger than a predetermined weight, so that an actual movement of the support member reaches the target movement. The electromagnetic valve control unit determines the target movement based on a temporary weight. The weight estimation unit increases the temporary weight, even when the actual movement reached the target movement. The electromagnetic valve control unit decreases the target length, even when the temporary weight increased. The weight estimation unit estimates as the weight the temporary weight when the actual length has finally reached the target length.
    Type: Application
    Filed: March 7, 2017
    Publication date: July 9, 2020
    Applicant: Showa Corporation
    Inventors: Yosuke MURAKAMI, Hiroyuki MIYATA, Fumiaki ISHIKAWA
  • Publication number: 20200208707
    Abstract: The hydraulic shock absorber includes: a first cylinder containing fluid; a piston body including extension-side oil paths permitting flow of oil along with relative movement of the piston rod in the axial direction of the first cylinder; and an extension-side damping valve configured to open and close the extension-side oil paths of the piston body. The extension-side damping valve includes: a valve plate configured to close the extension-side oil paths by covering them and open them by deforming under pressure of oil; and a preload member configured to apply a preload to the valve plate. The preload member includes: a ring-shaped portion; and axis alignment portions configured to protrude from an outer periphery of the ring-shaped portion and contact the piston body to thereby perform axis alignment.
    Type: Application
    Filed: March 12, 2020
    Publication date: July 2, 2020
    Applicant: Showa Corporation
    Inventors: Gota NAKANO, Tomoaki SHINOZAKI
  • Publication number: 20200198690
    Abstract: The failure detection device includes: an output unit detecting failure of a torque detection device that detects torque applied to a pinion shaft with torque sensors, and a target current calculation unit controlling drive of the electric motor. In response to detection of failure of one of the torque sensors, the target current calculation unit causes the motor to output continuous torque continuously generating torque that is detectable by the other of the torque sensors and, in response to the motor outputting the continuous torque, the output unit diagnoses failure of the other of the torque sensors based on a pattern of vibrations detected by the other torque sensor due to the continuous torque and determines that the other torque sensor is having failure if amplitude of vibrations is less than a reference amplitude.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Applicant: Showa Corporation
    Inventor: Hiroaki KURIHARA
  • Publication number: 20200191228
    Abstract: A stroke sensor system includes a conductor, a coil which moves relative to the conductor and is fitted to one end side of the conductor; and a ferromagnetic body which is arranged on an end position side of the coil. A position of an end portion on one end side of the conductor in a state where a fitting ratio between the conductor and the coil is maximized is defined as the end position. The ferromagnetic body is located on an opposite side to the conductor with the coil interposed therebetween.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 18, 2020
    Applicant: Showa Corporation
    Inventors: Masato TOKUHARA, Kota SUZUKI, Yosuke FUJIKAWA, Naoya KUROIWA, Yosuke MURAKAMI
  • Publication number: 20200191233
    Abstract: A shock absorber includes a hollow rod, a suspension spring arranged outside the hollow rod, a spring receiver arranged to be displaceable with respect to the hollow rod and receiving a load of the suspension spring, an adjusting screw inserted into one end side of the hollow rod and configured to adjust a position of the suspension spring by restricting movement of the spring receiver to the one end side, and a shaft member which transmits a load received by the spring receiver to the adjusting screw inside the hollow rod. An insertion portion which extends in an axial direction of the hollow rod and into which the shaft member is inserted is provided on a side surface of the hollow rod.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 18, 2020
    Applicant: Showa Corporation
    Inventors: Naoya KUROIWA, Yosuke FUJIKAWA, Yosuke MURAKAMI
  • Publication number: 20200182325
    Abstract: A shock absorber includes a cylinder which is a conductor; a rod inserted into the cylinder from one end side of the cylinder, a suspension spring arranged outside the cylinder, a spring receiver which receives a load of the suspension spring on the one end side of the rod, and a protective member arranged on the one end side of the rod and configured to protect the rod. The protective member has a coil configured to detect a relative position between the cylinder and the protective member, and an end portion formed on the one end side of the protective member is arranged so as not to receive a load from the spring receiver.
    Type: Application
    Filed: February 14, 2020
    Publication date: June 11, 2020
    Applicant: Showa Corporation
    Inventors: Naoya KUROIWA, Yosuke FUJIKAWA, Yosuke MURAKAMI
  • Publication number: 20200171906
    Abstract: A suspension device includes: a damping device that damps a force generated between a vehicle body and a wheel of a vehicle; a determination unit that determines whether the vehicle is jumping, using an acceleration of the vehicle in a front-rear direction, an acceleration of the vehicle in a left-right direction, and an acceleration of the vehicle in a vertical direction; and a damping force control unit that increases a damping force of the damping device so as to be greater than the damping force generated when the determination unit does not determine that the vehicle is jumping, when the determination unit determines that the vehicle is jumping.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Applicant: SHOWA CORPORATION
    Inventor: Yosuke MURAKAMI
  • Publication number: 20200171909
    Abstract: A suspension device includes: a suspension including a damping device which damps a force generated between a vehicle body and a wheel; and a damping force control unit that increases a damping force of the damping device so as to be greater than the damping force generated when an acceleration of change in a stroke amount is less than a predetermined value determined in advance, when the acceleration of the change in the stroke amount is equal to or greater than the predetermined value, in which the stroke amount is an amount of displacement from a reference position of the wheel with respect to the vehicle body in an extension direction of the suspension.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Applicant: SHOWA CORPORATION
    Inventor: Yosuke MURAKAMI
  • Patent number: 10662944
    Abstract: An embodiment provides a vane pump device including a rotation shaft; and a pump unit that discharges oil at multiple discharge pressures, discharges oil to one side in an axial direction of the rotation shaft at a first discharge pressure of the multiple discharge pressures, and discharges oil to the other side in the axial direction at a second discharge pressure of the multiple discharge pressures.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: May 26, 2020
    Assignee: Showa Corporation
    Inventor: Toshio Nishikawa
  • Patent number: 10655624
    Abstract: In a vane pump device, an inner plate is provided with a low pressure side upstream recess portion; a low pressure side downstream recess portion that is positioned on the downstream side of the low pressure side upstream recess portion in a rotation direction of a rotor; and a low pressure side connection recess portion that connects to the low pressure side upstream recess portion and the low pressure side downstream recess portion. An outer plate includes an outer-plate low pressure side through-hole through which oil is supplied to the low pressure side upstream recess portion via columnar grooves of the rotor; an outer-plate low pressure side recess portion into which oil flows from the low pressure side downstream recess portion via the columnar grooves; and an outer-plate connection portion through which connects to the outer-plate low pressure side through-hole and the outer-plate low pressure side recess portion.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: May 19, 2020
    Assignee: SHOWA CORPORATION
    Inventor: Toshio Nishikawa
  • Patent number: 10654331
    Abstract: A vehicle height adjustment device includes front forks, a rear suspension, a weight estimation unit, and a front wheel-side target movement amount determination unit. The front fork includes a front wheel-side suspension spring and a front wheel-side support member, which supports one end of the front wheel-side suspension spring, and moves toward another end of the front wheel-side spring to change the front wheel-side suspension spring length. The rear suspension includes a rear wheel-side suspension spring and a rear wheel-side support member, which supports one end of the rear wheel-side suspension spring, and moves toward another one end of the rear wheel-side spring to change the rear wheel-side suspension spring length. The weight estimation unit estimates a weight applied to a vehicle. The front wheel-side target movement amount determination unit decreases, a movement amount of the front wheel-side support member as the estimated weight increases.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: May 19, 2020
    Assignee: Showa Corporation
    Inventors: Yosuke Murakami, Hiroyuki Miyata, Fumiaki Ishikawa
  • Publication number: 20200141466
    Abstract: A hydraulic shock absorber includes: a cylinder; a piston rod on which a first piston, a valve, and a second piston are disposed sequentially from one end side; and an oil lock portion that is disposed on the one end side inside the cylinder, and that forms a gap flow path between the oil lock portion and an outer circumferential surface of the first piston. The first piston has a piston internal flow path, and is displaceable in an axial direction of the piston rod. When the piston rod moves toward the one end side, the first piston relatively moves toward the other end side with respect to the piston rod and the other end side of the first piston abuts against the valve, so that due to a flow of working oil passing through the piston internal flow path, the valve bends to generate damping force.
    Type: Application
    Filed: December 20, 2019
    Publication date: May 7, 2020
    Applicant: Showa Corporation
    Inventors: Hiroyuki MIYATA, Yosuke MURAKAMI
  • Publication number: 20200114965
    Abstract: A steering control device includes: an electric motor configured to apply an assist force to steering of a steering wheel; a torque sensor configured to detect steering torque of the steering wheel; a base target current setting unit configured to set a base driving force of the electric motor on the basis of the steering torque detected by the torque sensor; and an addition determination unit configured to determine whether a driving force larger than the base driving force is to be set, on the basis of a rotation speed of the electric motor.
    Type: Application
    Filed: December 11, 2019
    Publication date: April 16, 2020
    Applicant: Showa Corporation
    Inventors: Kosuke SANO, Junya HIRATA
  • Patent number: 10612546
    Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction of the rotor, and supplies oil to the columnar grooves. It includes a low pressure side upstream recess portion, a low pressure side downstream recess portion, and a low pressure side connection recess portion that connects the low pressure side upstream recess portion and the low pressure side downstream recess portion. The width of the low pressure side downstream recess portion is narrower than that of the low pressure side upstream recess portion. The width of the low pressure side connection recess portion is equal to that of the low pressure side downstream recess portion.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: April 7, 2020
    Assignee: Showa Corporation
    Inventor: Toshio Nishikawa
  • Publication number: 20200094646
    Abstract: A vehicle height adjusting apparatus includes: a cylindrical body internally partitioned into a plurality of oil chambers by a partition wall provided along an axis, the oil chambers filled with oil, and respectively provided with cylindrical body oil holes to be connected to an outside; one operating portion rotatably provided on the cylindrical body, and rotated to be moved along the axis; pistons moved along the axis by the operating portion, and received in the oil chambers respectively; and a plurality of damper devices respectively provided with damper oil holes into which the oil flowing out of the cylindrical body oil holes when the pistons move flows, the damper devices that can adjust a vehicle height by amounts of the oil filled into the damper devices through the damper oil holes, and that can absorb impact energy inputted on a wheel.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: Showa Corporation
    Inventors: Yukihiro HOSHINO, Takafumi ITO, Hidenori SHIRABE, Toshitaka AOKI