Patents by Inventor Tomohiro Tasaka

Tomohiro Tasaka 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).

  • Publication number: 20110311367
    Abstract: It is an object of the present invention to inhibit generation of a vortex in the position where operating oil separates from a stator and to increase a capacity coefficient by allowing the operating oil to efficiently flow from a turbine to an impeller. A torque converter stator of the present invention is configured to regulate the flow of operating oil returning from a turbine to an impeller within a torque converter. The torque converter stator includes an annular stator shell, a plurality of stator blades and an annular stator core. The stator blades are radially extended from the stator shell. The stator blades respectively include a corrugated operating-oil outlet-side edge. The stator core is disposed on the outer peripheries of the stator blades.
    Type: Application
    Filed: February 4, 2010
    Publication date: December 22, 2011
    Applicant: EXEDY CORPORATION
    Inventors: Nobuyoshi Shiomura, Tomohiro Tasaka
  • Patent number: 7444807
    Abstract: A torque converter includes: a impeller having an outer shell, an inner core, and at least one pump blade provided between the outer shell and the inner core; a turbine having at least one turbine blade; and a stator capable of establishing a fluid circulation between the impeller and the turbine. An exit angle of the at least one pump blade is greater than ?90 degrees up to ?68 degrees at the most, beginning from a first point, at which the at least one pump blade is in contact with the outer shell, to a second point, at which the at least one pump blade is in contact with the inner core.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: November 4, 2008
    Assignees: Aisin Seiki Kabushiki Kaisha, EXEDY Corporation
    Inventors: Yukihisa Tsuzuki, Takao Fukunaga, Tomohiro Tasaka
  • Patent number: 7401688
    Abstract: A torque converter 1 with a lock-up device 4 is provided to improve damping performance while suppressing an increase in the axial dimension. A torus 3 of the torque converter 1 includes an impeller 10, a turbine 11 and stator 12. The torus 3 has a shape such that a radial direction dimension is longer than an axial dimension thereof, and a longitudinal axis t1 is inclined away from a straight line P perpendicular to a rotational axis such that a radially outer portion of the longitudinal axis t1 is closer toward the engine than a radially inner portion thereof. The torsion springs 52 are located adjacent on the front cover side of a radially inner portion of the torus 3.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: July 22, 2008
    Assignee: Exedy Corporation
    Inventors: Takao Fukunaga, Tomohiro Tasaka
  • Publication number: 20060185955
    Abstract: A torque converter 1 with a lock-up device 4 is provided to improve damping performance while suppressing an increase in the axial dimension. A torus 3 of the torque converter 1 includes an impeller 10, a turbine 11 and stator 12. The torus 3 has a shape such that a radial direction dimension is longer than an axial dimension thereof, and a longitudinal axis t1 is inclined away from a straight line P perpendicular to a rotational axis such that a radially outer portion of the longitudinal axis t1 is closer toward the engine than a radially inner portion thereof. The torsion springs 52 are located adjacent on the front cover side of a radially inner portion of the torus 3.
    Type: Application
    Filed: February 22, 2006
    Publication date: August 24, 2006
    Applicant: Exedy Corporation
    Inventors: Takao Fukunaga, Tomohiro Tasaka
  • Publication number: 20060064970
    Abstract: A torque converter includes: a impeller having an outer shell, an inner core, and at least one pump blade provided between the outer shell and the inner core; a turbine having at least one turbine blade; and a stator capable of establishing a fluid circulation between the impeller and the turbine. An exit angle of the at least one pump blade is greater than ?90 degrees up to ?68 degrees at the most, beginning from a first point, at which the at least one pump blade is in contact with the outer shell, to a second point, at which the at least one pump blade is in contact with the inner core.
    Type: Application
    Filed: September 27, 2005
    Publication date: March 30, 2006
    Applicants: Aisin Seiki Kabushiki Kaisha, EXEDY Corporation
    Inventors: Yukihisa Tsuzuki, Takao Fukunaga, Tomohiro Tasaka
  • Publication number: 20040118113
    Abstract: A torque converter having an improved capacity coefficient at high-speed ratios is provided. An impeller 11, a turbine 12, and a stator 13 constitute a torus. The torus rotates about a rotational axis O-O. The impeller 11, turbine 12, and stator 13 each have blades 22, 32, and 42. Furthermore, the radius R1 of the impeller inflow part 22a, i.e., the distance between the radially inside end part of the impeller blades 22 and the rotational axis, is smaller than the radius R2 of the stator inflow/outflow part 42a, i.e., the distance between the radially inside end parts of the stator blades 42 and the rotational axis.
    Type: Application
    Filed: December 10, 2003
    Publication date: June 24, 2004
    Inventors: Takao Fukunaga, Tomohiro Tasaka