Patents Assigned to Yamada Manufacturing Co., Ltd.
  • Patent number: 10895326
    Abstract: A control valve includes a valve housing, a joint member, a valve body, and a sealing tube member. A seal ring, which receives a liquid pressure inside the valve housing and comes into tight contact with the joint member and the sealing tube member, is provided between the joint member and the sealing tube member. The sealing tube member has a biasing pressure receiving surface receiving the liquid pressure inside the valve housing in a direction along a direction of the valve body. The seal ring is disposed at a position where the sealing tube member is not pressurized in the direction of the valve body. An area of a valve sliding contact surface is set to be larger than an area of the biasing pressure receiving surface.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: January 19, 2021
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Akifumi Ozeki
  • Patent number: 10875567
    Abstract: An inner shaft of a steering device and an outer shaft thereof are provided so as to be movable relative to each other via a movement mechanism along an axial line. The inner shaft includes a first abutting member and a second abutting member which are disposed along the axial line and which have different hardness. The outer shaft includes a torque transmitting portion which abuts either the first abutting member or the second abutting member only upon operation given to the movement mechanism, and which is capable of transmitting torque with either the one abutting member only. The movement mechanism includes a movement mechanism main body which is provided on the main pipe and which moves along the axial line.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: December 29, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Toru Sekiguchi
  • Publication number: 20200400062
    Abstract: A valve device includes: a casing having an outflow port in which a fluid outlet opening is formed; a joint joined to an opening end surface of the outlet opening; a valve accommodated in the casing so as to be rotatable or slidable and in which a communication port that can communicate with the outlet opening is formed; and a sliding ring with a sliding surface for sliding on an outer surface of the valve while being accommodated in the outflow port and communicates the outlet and the communication port based upon a position of the valve. At least the outer surface of the valve includes a first resin material that contains a first resin, at least the sliding surface of the sliding ring includes a second resin material that contains a second resin, and the first resin and the second resin are the same type of resin.
    Type: Application
    Filed: September 25, 2018
    Publication date: December 24, 2020
    Applicant: Yamada Manufacturing Co., Ltd.
    Inventors: Akifumi OZEKI, Toshihito NAGAI
  • Patent number: 10870443
    Abstract: A steering device, a hanger bracket having a first suspended plate-like portion and a second suspended plate-like portion and fixed firmly to a column pipe, an outer column having an enclosing main body portion enclosing the column pipe and a tightening portion, a fixed bracket supporting the outer column, and a tightening tool that tightens and loosens the outer column and the fixed bracket and has a bolt shaft. Long hole portions that extend in the axial direction and are each formed of a telescopic long hole and a shock absorbing long hole are formed in the first suspended plate-like portion and the second suspended plate-like portion respectively. A telescopic stopper is provided in at least either one of the long hole portions. An inclined region including a plurality of consecutive inclined sides and the vertical size of which gradually becomes narrow is provided in the other long hole portion.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: December 22, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Ryosuke Takahashi, Koji Hirooka
  • Patent number: 10865789
    Abstract: A scavenge pump includes: a pump housing including a housing body and a cover member, the housing body having a rotor chamber in which an inlet port, an outlet port, and a bearing hole formed by shaft holes with varying diameters with a stepped surface therebetween are provided; an outer rotor housed in the rotor chamber and having inner teeth; an inner rotor having outer teeth and a shaft support hole; and a drive shaft inserted or fixedly attached to the shaft support hole. The bearing hole includes a stepped inner circumferential part having a larger diameter than that of the drive shaft at an open peripheral edge on one side facing the rotor chamber, and a groove that extends through between a point close to a trailing end of the outlet port and the stepped inner circumferential part is formed.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: December 15, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Atsushi Kaneko, Kei Hosoya
  • Patent number: 10851687
    Abstract: A relieve valve device includes a housing including a valve chamber, an orifice, and a relief discharge port, a valve body that opens and closes the relief discharge port while moving inside the valve chamber of the housing, a relief valve including an elastic member that elastically biases the valve body in a direction in which the valve body closes the relief discharge port, and an oil control valve that controls a supply of oil into the valve chamber. An inlet port for the oil supplied from the oil control valve and the orifice are configured such that the oil can always circulate in the valve chamber. The valve chamber includes a first valve passage portion including the orifice, and a second valve passage portion. The valve body includes a first valve portion and a second valve portion arranged in an axial direction.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: December 1, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Takatoshi Watanabe, Junichi Miyajima, Atsushi Kaneko, Yuya Kato
  • Patent number: 10837560
    Abstract: A method of manufacturing a thermo valve includes an overlaying step of overlaying a valve body onto a thermo actuator so as to cover a groove portion; and a caulking step of caulking an installing portion of the valve body onto the thermo actuator. The caulking step is performed by pressing, by use of a jig, the valve body and the thermo actuator toward an axis center in a radial direction. A pressing face of the jig has a short side portion and a long side portion longer than the short side portion. Pressing is performed with the long side portion being substantially in parallel to the axis center of the thermo actuator and the short side portion being substantially in parallel to the groove portion.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: November 17, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Kazuo Shoji, Junichi Miyajima, Soichi Yoshino
  • Patent number: 10801494
    Abstract: A hydraulic control apparatus is provided including: an electromagnetic valve that has an input port communicating with a supply destination unit of oil and a control port that is switched between communication and disconnection by resultant force of a hydraulic pressure of the supply destination unit and electromagnetic force; a variable displacement pump which has a suction port communicating with a supply source of the oil, an ejection port communicating with the supply destination unit, and a control chamber communicating with the control port and rotates in accordance with drive of the supply destination unit, in which an amount of the oil ejected to the supply destination unit through the ejection port changes in accordance with a pressure in the control chamber; and a control unit that controls a value of a necessary current that is caused to flow through the electromagnetic valve.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: October 13, 2020
    Assignees: YAMADA MANUFACTURING CO., LTD., KEIHIN CORPORATION
    Inventors: Yuji Senbongi, Kenichi Fujiki, Toru Kobayashi, Ken Kaneko, Takahiro Satou, Haruyo Kobayashi, Yoshiharu Segawa, Naoki Oikawa, Syu Murayama, Kentaro Yamanaka, Yuhki Jyo
  • Patent number: 10759464
    Abstract: A steering device includes a main pipe, an inner shaft supported by the main pipe so as to be rotatable, and an outer shaft into which the inner shaft is fitted and which is rotatable together with the inner shaft. The outer shaft is provided so as to be relatively movable along an axial line via a movement mechanism. The inner shaft includes a first inner shaft and a second inner shaft. The first inner shaft includes a first abutting member and a second abutting member arranged side by side along the axial line and having different hardness. The outer shaft abuts either the first abutting member or the second abutting member only upon operation given to the movement mechanism.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: September 1, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Toru Sekiguchi
  • Patent number: 10753404
    Abstract: A steering device includes an inner shaft and an outer shaft. The inner shaft includes an axial member provided on an axial line, a first abutting member provided on an outer circumference of the axial member, and a second abutting member disposed adjacent to the first abutting member, and having a different hardness from that of the first abutting member. An abutting member support of the axial member where the first abutting member and the second abutting member are provided is formed in a shape other than a circular shape. The outer shaft includes a torque transmitting member which abuts only either the first abutting member or the second abutting member and which is capable of transmitting torque only with the abutting member that is abutting the torque transmitting member.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: August 25, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Toru Sekiguchi
  • Patent number: 10737714
    Abstract: A steering device is configured such that an EA stopper and a telescopic lock tooth are engaged with each other such that an inner column and a fixation member move forward with respect to a hanger bracket in a case where a load in a forward direction that acts on the inner column is equal to or greater than a predetermined value. Regarding a telescopic stopper, the fixation member comes into contact with the telescopic stopper in accordance with movement of the inner column and the fixation member with respect to the hanger bracket such that the telescopic stopper rotates in a withdrawal direction in which the telescopic stopper is withdrawn from the fixation member.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: August 11, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Yoshinori Shiroishi
  • Patent number: 10711844
    Abstract: A yoke has a yoke main body portion and a thin portion. The thin portion extends from the yoke main body portion toward the shaft, and is thinner than the yoke main body portion. The front end of the shaft is a large-diameter portion that has a larger diameter than an adjacent portion. The yoke main body portion has a yoke general-diameter portion and a step portion. The yoke general-diameter portion has an inner diameter that is substantially equal to an outer diameter of the large-diameter portion. The step portion extends from an end of the yoke general-diameter portion toward an axial line, and has an inner diameter smaller than the outer diameter of the large-diameter portion. The step portion abuts a front end of the large-diameter portion. The thin portion has reduced-radius portions that have smaller radii than the outer radius of the large-diameter portion.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: July 14, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Takuya Aiba, Toru Sekiguchi, Koji Hirooka
  • Patent number: 10700567
    Abstract: An insulator constituting a stator for a motor includes an extension portion that extends from a portion of a circumferential wall portion toward a plurality of terminals conforming to an axis line of the stator. A sealing member includes a cut-out hole in between an adjacent pair of the plurality of terminals, the cut-out hole being a through-hole extending conforming to the axis line. An end of the cut-out hole is blocked by an end surface of the extension portion.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: June 30, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Daisuke Kiryu, Satoshi Watanabe, Masahiko Hoshino
  • Patent number: 10696319
    Abstract: A steering device includes an outer column, an inner column, and a hanger bracket. The inner column is configured such that the inner column and a fixation member move forward with respect to the hanger bracket in a case where a load in a forward direction that acts on the inner column is equal to or greater than a predetermined value in the locked state. A sliding friction portion that slides on at least one of the inner column and the hanger bracket in accordance with movement of the inner column with respect to the hanger bracket is provided between the inner column and the hanger bracket.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: June 30, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Yoshinori Shiroishi
  • Patent number: 10677118
    Abstract: A thermo actuator includes an actuator body and a large-diameter portion (54) that projects from the actuator body outward in the radial direction. The outer diameter of a return spring is smaller than the inner diameter of a case. The outer diameter of the actuator body and the outer diameter of a valve body are smaller than the inner diameter of the return spring. The outer diameter of the large-diameter portion is smaller than the inner diameter of the case and is larger than the average diameter of the return spring. One end of the return spring is in contact with the large-diameter portion.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: June 9, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Junichi Miyajima, Kazuo Shoji, Soichi Yoshino
  • Patent number: 10654512
    Abstract: A steering device includes an inner column and an outer column which has a guide cylinder portion supporting the inner column to be movable in an axial direction and a holding cylinder portion located at a rear side in the axial direction in relation to the guide cylinder portion and having a slit extending in the axial direction. The guide cylinder portion has a support face which slidably supports an outer circumferential face of the inner column and a regulation face which is located at a front side in the axial direction in relation to the support face and regulates a movement of the inner column in a radial direction. The guide cylinder portion is formed so that a distance from an axis to the regulation face in the radial direction is longer than a distance from the axis to the support face.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: May 19, 2020
    Assignees: YAMADA MANUFACTURING CO., LTD., HONDA MOTOR CO., LTD.
    Inventors: Toshihito Osawa, Minoru Takakusaki, Eric M. Heitkamp, Robert A. Salemme, Cameron R. Titus, Joshua D. Pritchard, Toshihiro Nakamura
  • Patent number: 10654514
    Abstract: A steering device includes a plurality of telescopic lock teeth, a lock bolt, an EA stopper, and a first urging member. An outer circumferential surface of the lock bolt is formed with a bolt engagement portion. An inner circumferential surface of an EA insertion hole is formed with an EA protruding portion that is engaged with a bolt engagement portion in a direction in which the EA stopper is moved toward an abutting position in a bolt circumferential direction.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: May 19, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Yoshinori Shiroishi
  • Patent number: 10648577
    Abstract: A control valve includes a casing that has a port in which an outflow opening is formed, a joint that is joined to an opening end surface of an outflow opening in the port, a rotor that is rotatably accommodated inside the casing, a slide ring that has a slide surface for sliding on an outer circumferential surface of the rotor, a sealing ring that is interposed between an inner circumferential surface of the port and an outer circumferential surface of the slide ring, and a holder that is disposed between the inner circumferential surface of the port and the outer circumferential surface of the slide ring and holds the sealing ring from an outer side in a port axial direction with respect to the sealing ring. The holder is disposed to be separated from at least any of the joint and the port.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: May 12, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventor: Akifumi Ozeki
  • Patent number: 10641143
    Abstract: [Problem] To provide a relief device for an oil circuit of an engine provided with an oil pressure relief valve and a temperature-sensitive relief valve, with which it is possible for oil to be relieved (expelled) at the intended pressure regardless of the oil temperature, and with which it is possible to simplify the configuration. [Solution] The relief device comprises an oil pump (9), an upstream channel (61) provided from a discharge side of the oil pump (9) to an engine (E), an oil pressure relief valve (A) for relieving oil due to the valve body being moved by oil pressure, and a temperature-sensitive relief valve (B) for relieving oil by sensing the oil temperature and continuously opening and closing. The oil pressure relief valve (A) and the temperature-sensitive relief valve (B) are arranged in parallel in the upstream channel (61).
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: May 5, 2020
    Assignee: YAMADA MANUFACTURING CO., LTD.
    Inventors: Junichi Miyajima, Takatoshi Watanabe, Yuya Kato
  • Patent number: 10626999
    Abstract: A control valve having first, second, and third outlet ports, which pass through a casing in a radial direction and formed axially at intervals in the casing, first, second and third communication ports, which respectively communicate between the flow path and the first outlet port, between the flow path and the second outlet port and between the flow path and the third outlet port according to a rotational position of the valve, are formed at intervals in the axial direction in the valve. The second outlet port is located between the first and third outlet ports in the axial direction and also located at a different position from the first and third outlet ports in a circumferential direction. An opening width of the second communication port in the axial direction is narrower than an axial interval between the first and third outlet ports.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: April 21, 2020
    Assignee: Yamada Manufacturing Co., Ltd.
    Inventors: Akifumi Ozeki, Toshihito Nagai