Patents by Inventor Sachiyo Hasegawa

Sachiyo Hasegawa 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: 8075357
    Abstract: An oil supply device includes an axial oil passage and an intersecting oil passage provided in a propeller shaft, an axial oil passage and an intersecting oil passage provided in a drive shaft, and an oil guide passage. The intersecting oil passages allow oil inside the axial oil passages to be spouted radially of the shaft by centrifugal force generated as the shafts rotate. The oil is then supplied via the oil guide passage to an intermediate speed reduction device. As a result, it is possible to sufficiently lubricate an intermediate speed reduction device mounted on a drive shaft through a simple and compact arrangement.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: December 13, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yoshihito Fukuoka, Daisuke Nakamura, Hirotoshi Yamauchi, Sachiyo Hasegawa
  • Patent number: 7878290
    Abstract: A saddle riding type vehicle capable of making turns by leaning a vehicle body includes a pair of rear wheels provided at opposite sides of the vehicle body, a pair of support mechanisms arranged to support the pair of rear wheels to be movable, independently of each other, up and down about a pivot axis relative to the vehicle body, an engine disposed forward of the pivot axis to produce a drive force, a differential mechanism arranged to distribute the drive force of the engine to the pair of rear wheels and to absorb a rotating speed difference between the pair of rear wheels at a time of making a turn, the differential mechanism including drive shafts arranged between the engine and the pivot axis, a pair of shaft drive mechanisms provided for the pair of rear wheels, respectively, and arranged to transmit the drive force of the differential mechanism to the pair of rear wheels, and a pair of constant velocity universal joints provided for the pair of shaft drive mechanisms, respectively, each including a
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: February 1, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Masayuki Hirano, Takeshi Toyota, Sachiyo Hasegawa, Isao Fujii
  • Publication number: 20100147615
    Abstract: A saddle riding type vehicle capable of making turns by leaning a vehicle body includes a pair of rear wheels provided at opposite sides of the vehicle body, a pair of support mechanisms arranged to support the pair of rear wheels to be movable, independently of each other, up and down about a pivot axis relative to the vehicle body, an engine disposed forward of the pivot axis to produce a drive force, a differential mechanism arranged to distribute the drive force of the engine to the pair of rear wheels and to absorb a rotating speed difference between the pair of rear wheels at a time of making a turn, the differential mechanism including drive shafts arranged between the engine and the pivot axis, a pair of shaft drive mechanisms provided for the pair of rear wheels, respectively, and arranged to transmit the drive force of the differential mechanism to the pair of rear wheels, and a pair of constant velocity universal joints provided for the pair of shaft drive mechanisms, respectively, each including a
    Type: Application
    Filed: December 7, 2009
    Publication date: June 17, 2010
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Eiichirou TSUJII, Masayuki HIRANO, Takeshi TOYOTA, Sachiyo HASEGAWA, Isao FUJII
  • Publication number: 20090181585
    Abstract: An oil supply device includes an axial oil passage and an intersecting oil passage provided in a propeller shaft, an axial oil passage and an intersecting oil passage provided in a drive shaft, and an oil guide passage. The intersecting oil passages allow oil inside the axial oil passages to be spouted radially of the shaft by centrifugal force generated as the shafts rotate. The oil is then supplied via the oil guide passage to an intermediate speed reduction device. As a result, it is possible to sufficiently lubricate an intermediate speed reduction device mounted on a drive shaft through a simple and compact arrangement.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 16, 2009
    Applicant: YAMAHA MARINE KABUSHIKI KAISHA
    Inventors: Yoshihito FUKUOKA, Daisuke NAKAMURA, Hirotoshi YAMAUCHI, Sachiyo HASEGAWA
  • Patent number: 6513609
    Abstract: A unit housing of a transmission unit for a hybrid vehicle is constituted by a first housing (42), a second housing (42), and a third housing (49). The first housing is provided with a first partitioning wall (46) and a third partitioning wall (70). The second housing is provided with a second partitioning wall (45) and a fourth partitioning wall (71). A first seal flange surface (72) formed on an end surface of the third partitioning wall (70) is on the same plane as an end surface of the first housing. A second seal flange surface formed on the end surface of the fourth partitioning wall is on the same plane as an end surface of the second housing. The first housing (42) and the second housing (41) are joined together by the first and second seal flange surfaces. A seal characteristic of each dry chamber against wet chambers can be assured in the unit housing with a wide space assured.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: February 4, 2003
    Assignee: Jatco Transtechnology Ltd.
    Inventor: Sachiyo Hasegawa
  • Patent number: 6397968
    Abstract: A transmission unit for a hybrid vehicle includes a housing formed with a water jacket for cooling a stator of a motor. The water jacket includes a hollow annular passage having a water inlet and a water outlet. The water jacket has at least one uneven or depressed portion for avoiding an adjacent component. At the uneven portion, the cross sectional shape of the flow passage is varied gradually and smoothly so that the cross-sectional area of the flow passage remains constant. The water jacket further includes an inflow passage extending in a tangential direction to the water inlet, and an outflow passage extending in a radial direction from the water outlet.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: June 4, 2002
    Assignee: Jatco Transtechnology Ltd.
    Inventors: Taku Sugano, Sachiyo Hasegawa
  • Publication number: 20010024997
    Abstract: A transmission unit for a hybrid vehicle includes a housing formed with a water jacket for cooling a stator of a motor. The water jacket includes a hollow annular passage having a water inlet and a water outlet. The water jacket has at least one uneven or depressed portion for avoiding an adjacent component. At the uneven portion, the cross sectional shape of the flow passage is varied gradually and smoothly so that the cross-sectional area of the flow passage remains constant. The water jacket further includes an inflow passage extending in a tangential direction to the water inlet, and an outflow passage extending in a radial direction from the water outlet.
    Type: Application
    Filed: February 20, 2001
    Publication date: September 27, 2001
    Applicant: JATCO TRANSTECHNOLOGY LTD.
    Inventors: Taku Sugano, Sachiyo Hasegawa
  • Publication number: 20010023790
    Abstract: A unit housing of a transmission unit for a hybrid vehicle is constituted by a first housing (42), a second housing (42), and a third housing (49). The first housing is provided with a first partitioning wall (46) and a third partitioning wall (70). The second housing is provided with a second partitioning wall (45) and a fourth partitioning wall (71). A first seal flange surface (72) formed on an end surface of the third partitioning wall (70) is on the same plane as an end surface of the first housing. A second seal flange surface formed on the end surface of the fourth partitioning wall is on the same plane as an end surface of the second housing. The first housing (42) and the second housing (41) are joined together by the first and second seal flange surfaces. A seal characteristic of each dry chamber against wet chambers can be assured in the unit housing with a wide space assured.
    Type: Application
    Filed: February 20, 2001
    Publication date: September 27, 2001
    Applicant: JATCO TRANSTECHNOLOGY LTD.
    Inventor: Sachiyo Hasegawa