Patents by Inventor Masayuki Sayama

Masayuki Sayama 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: 8820504
    Abstract: A hydraulic system is preferably used in combination with a motor and a clutch of a hybrid vehicle. The hydraulic system is comprised of a pump coupled with the motor to pressurize fluid; a pressurized fluid path coupled with the pump to conduct the pressurized fluid; an operating fluid path connecting the pressurized fluid path with the clutch to actuate the clutch; a depressurized fluid path to conduct depressurized fluid; and an on-off valve operated in cooperation with the clutch to selectively permit fluid connection of the pressurized fluid path to the depressurized fluid path so as to relieve pressure in the pressurized fluid path.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: September 2, 2014
    Assignee: GKN Driveline Japan Ltd.
    Inventor: Masayuki Sayama
  • Patent number: 8667864
    Abstract: In order to avoid competition with other components for a space, to thereby improve the degree of designing freedom, the power transmission apparatus includes a transfer case housing and supporting a ring gear and a pinion gear that orthogonally mesh with each other and form an orthogonal gear set, the transfer case is divided into a first case part and a second case part along a division plane that extends along an axis of rotation of the ring gear, and the first and second case parts and are fixed together along the division plane with bolts.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: March 11, 2014
    Assignee: GKN Driveline Torque Technology KK
    Inventors: Kazuto Kenmotsu, Atsushi Oda, Masayuki Sayama, Yoshiyuki Nakabayashi
  • Patent number: 8616087
    Abstract: A power transmission device is comprised of a first shaft having a first gear and a second gear and capable of being drivingly coupled with the engine; a second shaft drivingly coupled with the electric motor and the first shaft; a third gear meshing with the first gear to form a first gearing having a first gear ratio; a fourth gear coaxial with the third gear, the fourth gear meshing with the second gear to form a second gearing having a second gear ratio; a third shaft coaxial with both the third gear and the fourth gear, the third shaft being drivingly coupled with the axles; a first clutch configured to selectively connect and disconnect the third gear with the third shaft; and a second clutch configured to selectively connect and disconnect the fourth gear with the third shaft.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 31, 2013
    Assignee: GKN Driveline Japan, Ltd.
    Inventor: Masayuki Sayama
  • Publication number: 20120266704
    Abstract: A power transmission device is comprised of a first shaft having a first gear and a second gear and capable of being drivingly coupled with the engine; a second shaft drivingly coupled with the electric motor and the first shaft; a third gear meshing with the first gear to form a first gearing having a first gear ratio; a fourth gear coaxial with the third gear, the fourth gear meshing with the second gear to form a second gearing having a second gear ratio; a third shaft coaxial with both the third gear and the fourth gear, the third shaft being drivingly coupled with the axles; a first clutch configured to selectively connect and disconnect the third gear with the third shaft; and a second clutch configured to selectively connect and disconnect the fourth gear with the third shaft.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 25, 2012
    Applicant: GKN Driveline Japan Ltd
    Inventor: Masayuki SAYAMA
  • Publication number: 20120055753
    Abstract: A hydraulic system is preferably used in combination with a motor and a clutch of a hybrid vehicle. The hydraulic system is comprised of a pump coupled with the motor to pressurize fluid; a pressurized fluid path coupled with the pump to conduct the pressurized fluid; an operating fluid path connecting the pressurized fluid path with the clutch to actuate the clutch; a depressurized fluid path to conduct depressurized fluid; and an on-off valve operated in cooperation with the clutch to selectively permit fluid connection of the pressurized fluid path to the depressurized fluid path so as to relieve pressure in the pressurized fluid path.
    Type: Application
    Filed: September 1, 2011
    Publication date: March 8, 2012
    Applicant: GKN Driveline Japan Ltd.
    Inventor: Masayuki SAYAMA
  • Patent number: 7990004
    Abstract: A reduction drive device is compact, hardly causes an electric motor thereof to vibrate, and has improved noise/vibration controllability. The reduction drive device includes the electric motor attached to a casing and capable of outputting torque, first and second reduction mechanisms supported by the casing, to reduce and transmit the rotational output of the electric motor, and a rear differential supported by the casing, to distribute the rotational output reduced by the first and second reduction mechanisms to a pair of axle shafts. Rotor, stator, and brush of the electric motor partly overlap the rear differential when seen in a rotation radius direction.
    Type: Grant
    Filed: September 16, 2006
    Date of Patent: August 2, 2011
    Assignee: GKN Driveline Torque Technology KK
    Inventors: Masashi Aikawa, Masayuki Sayama, Yoshiyuki Nakabayashi
  • Patent number: 7845479
    Abstract: An electromagnetic clutch is provided with: a clutch hub which is connected to a shaft member (one of a pair of rotation members); a clutch housing which is connected to a hollow shaft (the other of a pair of rotation members); a rotor which is connected to the clutch housing; a main clutch (clutch member) which is disposed between the clutch hub and the clutch housing; and an electromagnet which operates the main clutch. An end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction. The end of the rotor in a side of the clutch housing is formed with an extension portion which extends to the clutch housing in the axial direction. An outer periphery of the clutch housing is connected to the extension portion through a connection portion. The connection portion is disposed outside the main clutch in a radial direction.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: December 7, 2010
    Assignee: GKN Driveline Torque Technology KK
    Inventors: Tomiaki Ochiai, Koji Iizuka, Masayuki Sayama
  • Patent number: 7815029
    Abstract: In an electromagnetic clutch apparatus for forming a magnetic path in a circulating shape by an electromagnet at a pilot clutch alternately arranged with a main outer plate and a main inner plate and capable of controlling to transmit a torque between a clutch housing and a cam plate by being engaged in an axial direction and at a surrounding of a nonmagnetic portion continuously formed in the axial direction of a middle portion in a diameter direction of the pilot clutch to carry out an engaging, the nonmagnetic portion is formed by through holes in a circular arc shape having bridge portions for maintaining a shape in a diameter direction of the pilot clutch therebetween in a peripheral direction, and the bridge portion is divided in the diameter direction of the pilot clutch and a nonmagnetic member is interposed between divisions thereof.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: October 19, 2010
    Assignee: GKN Driveline Torque Technology KK
    Inventor: Masayuki Sayama
  • Patent number: 7592890
    Abstract: A magnetic-path member includes first and second magnetic portions positioned on inner and outer peripheral sides of the magnetic-path member respectively. The magnetic-path member includes a non-magnetic portion interposed between the first and second magnetic portions and coupling the first and second magnetic portions by heat sintering. Magnetic lines of force occurring from an electromagnet pass through the magnetic-path member.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: September 22, 2009
    Assignee: GKN Driveline Torque Technology KK
    Inventors: Masashi Aikawa, Koji Iizuka, Masayuki Sayama, Katsuyoshi Koike
  • Publication number: 20090160274
    Abstract: A reduction drive device is compact, hardly causes an electric motor thereof to vibrate, and has improved noise/vibration controllability. The reduction drive device includes the electric motor attached to a casing and capable of outputting torque, first and second reduction mechanisms supported by the casing, to reduce and transmit the rotational output of the electric motor, and a rear differential supported by the casing, to distribute the rotational output reduced by the first and second reduction mechanisms to a pair of axle shafts. Rotor, stator, and brush of the electric motor partly overlap the rear differential when seen in a rotation radius direction.
    Type: Application
    Filed: September 16, 2006
    Publication date: June 25, 2009
    Applicant: GKN Driveline Torque Technology KK
    Inventors: Masashi Aikawa, Masayuki Sayama, Yoshiyuki Nakabayashi
  • Publication number: 20080251344
    Abstract: An electromagnetic clutch is provided with: a clutch hub which is connected to a shaft member (one of a pair of rotation members); a clutch housing which is connected to a hollow shaft (the other of a pair of rotation members); a rotor which is connected to the clutch housing; a main clutch (clutch member) which is disposed between the clutch hub and the clutch housing; and an electromagnet which operates the main clutch. An end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction. The end of the rotor in a side of the clutch housing is formed with an extension portion which extends to the clutch housing in the axial direction. An outer periphery of the clutch housing is connected to the extension portion through a connection portion. The connection portion is disposed outside the main clutch in a radial direction.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 16, 2008
    Applicant: GKN DRIVELINE TORQUE TECHNOLOGY KK
    Inventors: Tomiaki Ochiai, Koji Iizuka, Masayuki Sayama
  • Publication number: 20080190726
    Abstract: In an electromagnetic clutch apparatus for forming a magnetic path in a circulating shape by an electromagnet at a pilot clutch alternately arranged with a main outer plate and a main inner plate and capable of controlling to transmit a torque between a clutch housing and a cam plate by being engaged in an axial direction and at a surrounding of a nonmagnetic portion continuously formed in the axial direction of a middle portion in a diameter direction of the pilot clutch to carry out an engaging, the nonmagnetic portion is formed by through holes in a circular arc shape having bridge portions for maintaining a shape in a diameter direction of the pilot clutch therebetween in a peripheral direction, and the bridge portion is divided in the diameter direction of the pilot clutch and a nonmagnetic member is interposed between divisions thereof.
    Type: Application
    Filed: August 30, 2007
    Publication date: August 14, 2008
    Applicant: GKN Driveline Torque Technology KK
    Inventor: Masayuki Sayama
  • Publication number: 20080113843
    Abstract: In order to avoid competition with other components for a space, to thereby improve the degree of designing freedom, the power transmission apparatus includes a transfer case housing and supporting a ring gear and a pinion gear that orthogonally mesh with each other and form an orthogonal gear set, the transfer case is divided into a first case part and a second case part along a division plane that extends along an axis of rotation of the ring gear, and the first and second case parts and are fixed together along the division plane with bolts.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 15, 2008
    Applicant: GKN Driveline Torque Technology KK
    Inventors: Kazuto Kenmotsu, Atsushi Oda, Masayuki Sayama, Yoshiyuki Nakabayashi
  • Publication number: 20060144666
    Abstract: A magnetic-path member includes first and second magnetic portions positioned on inner and outer peripheral sides of the magnetic-path member respectively. The magnetic-path member includes a non-magnetic portion interposed between the first and second magnetic portions and coupling the first and second magnetic portions by heat sintering. Magnetic lines of force occurring from an electromagnet pass through the magnetic-path member.
    Type: Application
    Filed: December 21, 2005
    Publication date: July 6, 2006
    Inventors: Masashi Aikawa, Koji Iizuka, Masayuki Sayama, Katsuyoshi Koike
  • Publication number: 20060014602
    Abstract: A motor power train which includes a reducer for amplifying motor drive torque, a differential device with a clutch mechanism and a differential gear unit to allocate the drive torque to wheels, and a casing for housing them. The reducer includes a first shaft as an input shaft; a second shaft to which the drive torque is transmitted form the first shaft; a first reduction gear set with a first gear on the first shaft and a second gear on the second shaft; and a second reduction gear set with a third gear on the second shaft and a fourth gear provided on the clutch mechanism of the differential device. The fourth gear and a large-diameter portion of the differential gear unit are offset in axial position without overlapping.
    Type: Application
    Filed: August 11, 2005
    Publication date: January 19, 2006
    Applicant: Tochigi Fuji Sangyo Kabushiki Kaisha
    Inventor: Masayuki Sayama
  • Patent number: 6969333
    Abstract: A motor power train which includes a reducer for amplifying motor drive torque, a differential device with a clutch mechanism and a differential gear unit to allocate the drive torque to wheels, and a casing for housing them. The reducer includes a first shaft as an input shaft; a second shaft to which the drive torque is transmitted form the first shaft; a first reduction gear set with a first gear on the first shaft and a second gear on the second shaft; and a second reduction gear set with a third gear on the second shaft and a fourth gear provided on the clutch mechanism of the differential device. The fourth gear and a large-diameter portion of the differential gear unit are offset in axial position without overlapping.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: November 29, 2005
    Assignee: Tochigi Fuji Sangyo Kabushiki Kaisha
    Inventor: Masayuki Sayama
  • Patent number: 6719110
    Abstract: A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow the pilot clutch 61 to be coupled. The pilot clutch 61 includes a plurality of clutch plates 87, 89 which are interleaved with respect to one another for sliding movements. Adjacent clutch plates 87, 87A, 87B, 89, 89A, 89B, 89C, 89D, 89E, 89F are formed with oil guide passageways 86, 96, 98, 106, 108, 110, 114 to create a hydrodynamic pressure effect to allow the clutch plates to be separated with a limited drag torque.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: April 13, 2004
    Assignee: Tochigi Fuji Sangyo Kabushiki Kaisha
    Inventors: Yasuhiko Ishikawa, Makoto Ishizuka, Yoshiyuki Nakabayashi, Kouji Iizuka, Yasushi Koshigaya, Yoshiaki Kitsunezuka, Kenji Karasawa, Masayuki Sayama
  • Publication number: 20030054913
    Abstract: A motor power train which includes a reducer for amplifying motor drive torque, a differential device with a clutch mechanism and a differential gear unit to allocate the drive torque to wheels, and a casing for housing them. The reducer includes a first shaft as an input shaft; a second shaft to which the drive torque is transmitted form the first shaft; a first reduction gear set with a first gear on the first shaft and a second gear on the second shaft; and a second reduction gear set with a third gear on the second shaft and a fourth gear provided on the clutch mechanism of the differential device. The fourth gear and a large-diameter portion of the differential gear unit are offset in axial position without overlapping.
    Type: Application
    Filed: September 11, 2002
    Publication date: March 20, 2003
    Applicant: TOCHIGI FUJI SANGYO KABUSHIKI KAISHA
    Inventor: Masayuki Sayama
  • Publication number: 20030015385
    Abstract: A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow the pilot clutch 61 to be coupled. The pilot clutch 61 includes a plurality of clutch plates 87, 89 which are interleaved with respect to one another for sliding movements. Adjacent clutch plates 87, 87A, 87B, 89, 89A, 89B, 89C, 89D, 89E, 89F are formed with oil guide passageways 86, 96, 98, 106, 108, 110, 114 to create a hydrodynamic pressure effect to allow the clutch plates to be separated with a limited drag torque.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 23, 2003
    Applicant: TOCHIGI FUJI SANGYO KABUSHIKI KAISHA
    Inventors: Yasuhiko Ishikawa, Makoto Ishizuka, Yoshiyuki Nakabayashi, Kouji Iizuka, Yasushi Koshigaya, Yoshiaki Kitsunezuka, Kenji Karasawa, Masayuki Sayama
  • Patent number: 6413183
    Abstract: An outer rotational member has an inner wall surface and an outer wall surface. An inner rotational member is arranged inside the outer rotational member. Friction-clutch means is provided between the inner rotational member and the outer rotational member and is fastened by a thrust force. An oil lubricates at least the friction-clutch means. An oil space intervenes between the inner rotational member and the outer rotational member. Seal means seals the oil in the oil space. A first oil reservoir is recessed on the inner wall surface of the outer rotational member toward a side of the outer wall surface side.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: July 2, 2002
    Assignee: Tochigi Fuji Sangyo Kabushiki Kaisha
    Inventors: Yasuhiko Ishikawa, Kazutaka Kawata, Hiroshi Nohara, Toshio Shiba, Naoshi Mogami, Katsumi Tanaka, Norihiko Tashiro, Naoyuki Shioda, Tadashi Oikawa, Akihiro Mashiyama, Osamu Ishikawa, Masayuki Sayama, Shigeyuki Shimada, Hideyuki Inose, Yoshiharu Shouda