Patents by Inventor Yasuji Taketsuna

Yasuji Taketsuna 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: 7125361
    Abstract: A toroydal type continuously variable transmission wherein a rollers is clamped in a rotatable condition by the input disc and the output disc arranged rotatably on the common axis line and opposed to each other; wherein an actuator for moving the roller backward and forward in the direction along a plane vertical to a center axis of rotation of those discs is provided; and wherein those discs, roller, and actuator are accommodated inside of the housing; and an installation portion protruding to the center portion of the housing is provided on inner face of the housing and the said actuators are fixed on the installation portion.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: October 24, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Patent number: 7094175
    Abstract: A lubrication device for a toroidal type continuously variable transmission, which can set the speed change ratio continuously by transmitting a torque inputted from a power source by rolling members contacting each other through an oil film, and by varying the position of the contact portion of those rolling members steplessly, characterized by comprising: an auxiliary hydraulic power unit for generating an oil pressure without relying on said power source, a preliminary operation detector for detecting whether or not the preliminary operation relative to the start up of said power source is executed, and a preliminary lubricating mechanism for feeding the lubricating oil to the contact portion between said rolling members by means of said auxiliary hydraulic power unit before starting up said power source, when the preliminary operation is detected.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: August 22, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Patent number: 7029418
    Abstract: A toroidai type continuously variable transmission wherein a rolling member is clamped between rotary members; and wherein a rolling face of rotary members being opposed to each other has a curved face, in which its sectional face along the plane including a center axis of rotation is shaped into an arc, in order to allow said rolling face of said rolling member inclining against the center axis of the rotation of said rotary member, characterized by: an oiling hole formed on the portion on the center side of the rotation in said rolling face of the rotary members being opposed to each other, or on the portion on the center side of the rotation leading to said rolling face; and the oil passage for feeding the lubricating oil to the oiling hole, formed on the center side of the rotation in said rotary member, with being communicated with the oiling hole.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: April 18, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Publication number: 20050151429
    Abstract: A motor having a rotation shaft extending in a horizontal direction and efficiently cooling stator portion includes a cooling oil inlet provided in a lower portion of the motor in order to introduce the cooling oil supplied from an oil pump through a supply pipe, a coil end cover for immersing a stator portion of the motor in order to discharge the cooling oil from the motor, and a discharge pipe connected to the cooling oil discharge outlet for discharging the cooling oil to an oil pan.
    Type: Application
    Filed: July 17, 2003
    Publication date: July 14, 2005
    Inventors: Yasuji Taketsuna, Toshiaki Katsu, Kenji Harada
  • Publication number: 20050045393
    Abstract: An in-wheel motor includes a motor, a shaft, an oil pump and oil paths. The oil pump is provided on one end of the shaft. The motor includes a stator core, stator coils and a rotor. The oil pump pumps up an oil from an oil reservoir via an oil path to supply the pumped-up oil to another oil path. The another oil path supplies the oil from the oil pump to the outer periphery of the stator core of the motor from an opening end.
    Type: Application
    Filed: August 19, 2004
    Publication date: March 3, 2005
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Ryoji Mizutani, Yasuji Taketsuna, Yuki Tojima, Atsushi Torii, Shigetaka Isogai
  • Patent number: 6764427
    Abstract: A toroidal type continuously variable transmission, in which there are provided a plurality of sets of speed change units each having rollers sandwiched between the opposed faces of input discs and output discs and in which the individual input discs are coupled to an input shaft whereas the individual output discs are coupled to an output shaft. The individual input discs or the individual output discs are held rotatably relative to each other, and the individual input discs are coupled in a torque transmitting manner to the input shaft through individual chains.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: July 20, 2004
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shigenori Tamaki, Yasuji Taketsuna
  • Publication number: 20040116240
    Abstract: A toroidal type continuously variable transmission, in which an input disc and an output disc are arranged on the common axis with being opposed to each other in the rotatable condition, and in which the rolling member is arranged between the input disc and the output disc, so as to transmit a torque between said input disc and said output disc through said rolling member, by applying the clamping force to said input disc and said output disc in said axial direction, characterized by comprising a clamping force controller for controlling the clamping force to be applied to said input disc and said output disc based on a physical quantity relevant to heat stress of said rolling member.
    Type: Application
    Filed: June 23, 2003
    Publication date: June 17, 2004
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Publication number: 20040067816
    Abstract: A toroidai type continuously variable transmission wherein a rolling member is clamped between rotary members; and wherein a rolling face of rotary members being opposed to each other has a curved face, in which its sectional face along the plane including a center axis of rotation is shaped into an arc, in order to allow said rolling face of said rolling member inclining against the center axis of the rotation of said rotary member, characterized by: an oiling hole formed on the portion on the center side of the rotation in said rolling face of the rotary members being opposed to each other, or on the portion on the center side of the rotation leading to said rolling face; and the oil passage for feeding the lubricating oil to the oiling hole, formed on the center side of the rotation in said rotary member, with being communicated with the oiling hole.
    Type: Application
    Filed: June 23, 2003
    Publication date: April 8, 2004
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Publication number: 20040043860
    Abstract: A toroidal type continuously variable transmission in which a rolling member is arranged between a pair of rotary members with contacting its outer circumferential face with a rolling face of those rotary members being opposed to each other through an oil film, and in which a holding member for holding the rolling member in a rotatable condition is provided therewith, comprises: a lubricating oil feeding hole for spraying lubricating oil to a plurality of portions at the center side of the rotation of at least one of the end faces of said rolling member in an axial direction, which is arranged on said holding member.
    Type: Application
    Filed: July 10, 2003
    Publication date: March 4, 2004
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Publication number: 20040033860
    Abstract: A toroydal type continuously variable transmission wherein a rollers is clamped in a rotatable condition by the input disc and the output disc arranged rotatably on the common axis line and opposed to each other; wherein an actuator for moving the roller backward and forward in the direction along a plane vertical to a center axis of rotation of those discs is provided; and wherein those discs, roller, and actuator are accommodated inside of the housing; and an installation portion protruding to the center portion of the housing is provided on inner face of the housing and the said actuators are fixed on the installation portion.
    Type: Application
    Filed: May 29, 2003
    Publication date: February 19, 2004
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Publication number: 20040029674
    Abstract: A lubrication device for a toroidal type continuously variable transmission, which can set the speed change ratio continuously by transmitting a torque inputted from a power source by rolling members contacting each other through an oil film, and by varying the position of the contact portion of those rolling members steplessly, characterized by comprising: an auxiliary hydraulic power unit for generating an oil pressure without relying on said power source, a preliminary operation detector for detecting whether or not the preliminary operation relative to the start up of said power source is executed, and a preliminary lubricating mechanism for feeding the lubricating oil to the contact portion between said rolling members by means of said auxiliary hydraulic power unit before starting up said power source, when the preliminary operation is detected.
    Type: Application
    Filed: June 12, 2003
    Publication date: February 12, 2004
    Inventors: Yasuji Taketsuna, Shinegori Tamaki
  • Publication number: 20040029676
    Abstract: A toroidal type continuously variable transmission; in which a rolling member for mediating the transmission of a torque is clamped between at least a pair of rotary members; and in which a clamping force for clamping the rolling member in the direction not to let the rolling member be released from between the rotary members is applied to the rolling member, comprises: a detector for detecting temperature rise of either, a temperature of a rolling face of the rotary members for clamping the rolling member, or a temperature of the rolling member; and a rolling member controller for reducing the clamping force in case a temperature rise is detected by said detector.
    Type: Application
    Filed: June 12, 2003
    Publication date: February 12, 2004
    Inventors: Yasuji Taketsuna, Shinegori Tamaki
  • Publication number: 20030114268
    Abstract: A toroidal type continuously variable transmission, in which there are provided a plurality of sets of speed change units each having rollers sandwiched between the opposed faces of input discs and output discs and in which the individual input discs are coupled to an input shaft whereas the individual output discs are coupled to an output shaft. The individual input discs or the individual output discs are held rotatably relative to each other, and the individual input discs are coupled in a torque transmitting manner to the input shaft through individual chains.
    Type: Application
    Filed: August 10, 2002
    Publication date: June 19, 2003
    Inventors: Shigenori Tamaki, Yasuji Taketsuna
  • Patent number: 5679099
    Abstract: An apparatus for controlling a clutch of a motor vehicle connected to an engine and having a driving and a driven rotating member. The apparatus is capable of controlling an amount of slip of the clutch during starting of the vehicle.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: October 21, 1997
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shogo Kato, Koichi Sugihara, Yasuji Taketsuna, Tomoyuki Maeda