Patents by Inventor Masakatsu Miura

Masakatsu Miura 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: 4763749
    Abstract: A four-wheel drive vehicle has an engine output shaft; a transmission having an input shaft connected to the output shaft and an output shaft connected through a transmission mechanism to the input shaft; a drive gear meshed with an output gear connected to the output shaft of the transmission; a front wheel side power transmitting mechanism; a rear wheel side power transmitting mechanism; a center differential mechanism coaxial with the drive gear and having an input member connected to the drive gear, a first output member connected to the front wheel side power transmitting mechanism, and a second output member connected to the rear wheel side power transmitting mechanism; a front differential gear coaxial with the center differential mechanism and connected to the first output member of the center differential mechanism; a power converting gear mechanism for converting a rotation about a first axis to a rotation about a second axis being perpendicular to the first axis to transmit power to the rear side p
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: August 16, 1988
    Assignees: Aisin-Warner Limited, Toyota Kidosha Kabushiki Kaisha
    Inventors: Masakatsu Miura, Tatsuya Iwatsuki, Seitoku Kubo
  • Patent number: 4763748
    Abstract: A four-wheel drive vehicle has a front wheel side having a front wheel set, a rear wheel side having a rear wheel set, an engine having an output shaft extending in a transverse direction of a vehicular body, a transmission having an input shaft connected to the output shaft of the engine and an output shaft connected through a transmission mechanism to the input shaft such as to extend in a transverse direction of the vehicular body, a rotating member connected to the output shaft of the transmission, a front differential gear, a first output member connected between the rotating member and one of the wheel sets for transmitting power to one of the wheel sets through the front differential gear, a second output member coaxial with the first output member, a rear wheel propeller mechanism between the second output member and the other wheel set, and operative to convert the rotation of the second output member into rotation about an axis perpendicular to the axis of rotation of the second output member for dr
    Type: Grant
    Filed: December 18, 1985
    Date of Patent: August 16, 1988
    Assignees: Aisin-Warner Limited, Toyota Jidosha Kabushiki Kaisha
    Inventors: Masakatsu Miura, Tatsuya Iwatsuki, Seitoku Kubo
  • Patent number: 4739678
    Abstract: A four wheel drive automatic transmission, comprising: a speed-changing transmission unit; a front wheel transmission mechanism driven by the transmission unit and having a large driving gear and bearings for the large driving gear; a center differential unit having an input member driven by the large driving gear and two output members for driving front wheels and for driving rear wheels, respectively; a transfer with a rear wheel driving transmission having a driving gear member disposed coaxially with the output member for rear wheel driving, a connecting member between the output member for rear wheel driving and the driving gear member and a transfer output gear member driven by the driving gear member; a case in which the front wheel transmission mechanism, the center differential unit and the transfer are disposed; and, an oil separating structure defining separately lubricatable cavities within the case, the structure comprising two seal members, disposed between the connecting member and the case at
    Type: Grant
    Filed: December 9, 1985
    Date of Patent: April 26, 1988
    Assignees: Aisin-Warner Limited, Toyota Jidosha Kabushiki Kaisha
    Inventors: Masakatsu Miura, Takeshi Inuzuka, Tatsuya Iwatsuki, Seitoku Kubo, Koujiro Kuramochi
  • Patent number: 4722242
    Abstract: A plurality of clutches are disposed at one place in the automatic transmission of the present invention to form a clutch portion, the clutch portion is disposed at a front end portion of the automatic transmission mechanism portion, an annexed transmission part is disposed at a position adjacent to the automatic transmission mechanism portion, and the annexed transmission part is provided with a counter gear which is actuated by an output member of the automatic transmission mechanism portion and is detachably attached with a sub-transmission unit. When the transmission is assembled, a multitransmission stage can be obtained by modifying the clutch portion, and attaching/detaching the sub-transmission unit.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: February 2, 1988
    Assignee: Aisin-Warner Kabushiki Kaisha
    Inventors: Masakatsu Miura, Hideyuki Aoki
  • Patent number: 4716787
    Abstract: Sun gears of a single planetary gear unit and a dual planetary gear unit are connected with respect to each other, carriers of the respective gear units in the connected state are connected to an output member, an input member is connected to a ring gear of the single planetary gear unit through a first clutch and also to a sun gear through a second clutch, and the sun gear and a ring gear of the dual planetary gear unit are stoppable by retaining means. When travelling forward, the ring gear of the single planetary gear unit is inputted with torque from the input member based on the state of connection of the first clutch.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: January 5, 1988
    Assignee: Aisin-Warner Kabushiki Kaisha
    Inventors: Masakatsu Miura, Hideyuki Aoki
  • Patent number: 4711138
    Abstract: Sun gears of a single planetary gear unit and a dual planetary gear unit are connected with respect to each other, carriers of the respective gear units in the connected state are connected to an output member, an input member is connected to a ring gear of the single planetary gear unit through a first clutch, to a sun gear through a second clutch and also to a ring gear of the dual planetary gear unit through a third clutch, and the sun gear and a ring gear of the dual planetary gear unit are stoppable by retaining means. When in forward travelling, the ring gear of the single or dual planetary gear unit is inputted with torque from the input member based on connection of the first and/or third clutch.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: December 8, 1987
    Assignee: Aisin-Warner Kabushiki Kaisha
    Inventors: Masakatsu Miura, Hideyuki Aoki
  • Patent number: 4614256
    Abstract: An automatic transmission locking mechanism for parking, including a cam rod provided in the front portion thereof with a cam of a predetermined shape and interlocked at the rear end thereof with a manual shift lever, a sleeve supporting and guiding the cam rod for smooth axial movement and a pawl provided with a detent which made to engage with the parking gear of an automatic transmission by the axial movement of the cam rod when the manual shift lever is shifted to place the automatic transmission in the parking range.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: September 30, 1986
    Assignees: Aisin-Warner, K.K., Toyota Jidosha K.K.
    Inventors: Yoshinari Kuwayama, Masakatsu Miura, Kunio Morisawa
  • Patent number: 4610337
    Abstract: An automatic transmission locking mechanism for parking, comprising a detent lever interlocked with and adapted to be turned by a manual shift lever, a rod adapted to be advanced or retracted by the detent lever, a cam slidably mounted on the rod and adapted to push a pawl having a detent to the operating position where the detent engages with a parking gear when the automatic transmission is placed in the parking range, a bracket on which the cam runs and a spring for disengaging the detent from the parking gear and for retaining the pawl at the released position. The spring is disposed in the vicinity of the free end of the pawl and within a plane in which the pole turns, with one end thereof engaged with the free end portion of the pawl and with the other end thereof fixed in a finished hole formed in a stationary part.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: September 9, 1986
    Assignees: Aisin-Warner K.K., Toyota Jidosha K.K.
    Inventors: Yoshinari Kuwayama, Masakatsu Miura, Kunio Morisawa
  • Patent number: 4610336
    Abstract: An automatic transmission locking mechanism including a lever rotatively interlocked with a manual shift lever, a rod adapted to be advanced or retracted by the lever, a parking gear, a pawl with a detent having a detent to be engaged with the parking gear, a cam mounted on the rod for pushing up the pawl in shifting the manual shift lever to the parking position, a bracket on which the cam runs and a spring for releasing the pawl from the parking gear and for retaining the pawl at the released position, wherein the pawl is rotatably supported on a shaft of a reduced length and the spring is disposed near the free end of the pawl within a plane in which the pawl is turned on the shaft and thereby the locking mechanism is formed in a compact construction and is suitably applicable to a front-engine front-drive vehicle.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: September 9, 1986
    Assignees: Aisin-Warner K.K., Toyota Jidosha K.K.
    Inventors: Yoshinari Kuwayama, Masakatsu Miura, Kunio Morisawa
  • Patent number: 4607541
    Abstract: An automatic transmission having: a torque converter; a first planetary gear set; a second planetary gear set, and friction elements operated by hydraulic servos.The first planetary gear set has a hydraulic servo drum D.sub.1 for a clutch C.sub.1 connected to an input shaft, a sun gear provided within drum D.sub.1 and connected to the input shaft by clutch C.sub.1, a carrier connected to an output shaft, a ring gear connected to the input shaft and an intermediate shaft, a clutch C.sub.2, provided in a hydraulic servo drum D.sub.2, pinions rotatably supported by the carrier, and the gear set is provided on the inner side of clutch C.sub.2.The second planetary gear set has a sun gear mounted on the intermediate shaft and connected to a common inner race of a one-way clutch F.sub.0, a one-way brake F.sub.1, a carrier connected to a ring gear, the ring gear is connected to the output shaft, the intermediate shaft and a brake B.sub.2, a one-way brake F.sub.2 in series with brake B.sub.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: August 26, 1986
    Assignee: Aisin-Warner Kabushiki Kaisha
    Inventors: Masakatsu Miura, Takeshi Inuzuka
  • Patent number: 4594914
    Abstract: An automatic transmission includes a fluid torque converter and a first and a second gear transmission mechanism, each of which has two coaxial drive members--a power input member and a power output member--and is selectable to any one of several speed ratios. Rotational power is output from the fluid torque converter to the first gear transmission mechanism. The torque converter, and the first gear transmission mechanism including the power input and power output members thereof, are all coaxial on a first axis. A through lay shaft extends along a second axis parallel to the first axis, passing through the second gear transmission mechanism so as to support it, and is rotationally coupled to the power input member of the second gear transmission mechanism.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: June 17, 1986
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin-Warner Limited
    Inventors: Seitoku Kubo, Kunio Morisawa, Masakatsu Miura
  • Patent number: 4585103
    Abstract: An automatic transmission locking mechanism including a detent lever rotatively interlocked with a manual shift lever and provided with notches corresponding to the shift positions, respectively, of the manual shift lever for receiving the detent of a detent spring, a rod adapted to be advanced or retracted by the detent lever, a parking gear fixed to the output shaft of the automatic transmission, a pawl having a detent to be engaged with the parking gear in locking the parking gear, a cam slidably mounted on the rod and adapted to push the pawl for turning when the rod is advanced in shifting the manual shift lever to the parking position, a bracket on which the cam runs upward and a spring for releasing the pawl from the parking gear and for retaining the pawl at the released position. A contact surface formed in the free end of the pawl for engagement with the cam is formed so as to reduce the detrimental slip between the cam and the contact surface to the least possible degree.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: April 29, 1986
    Assignees: Aisin-Warner K.K., Toyota Jidosha K.K.
    Inventors: Yoshinari Kuwayama, Masakatsu Miura, Kunio Morisawa
  • Patent number: 4304153
    Abstract: An automatic transmission which is provided which has a transfer device between the speed change gears and an overdrive, said transfer device having an output gear which engages an input gear of a differential gear coaxially connected to an output shaft of the speed change gears.
    Type: Grant
    Filed: May 1, 1979
    Date of Patent: December 8, 1981
    Assignee: Aisin-Warner Kabushiki Kaisha
    Inventors: Shuzo Moroto, Masakatsu Miura, Kouji Sumiya, Michiaki Hiki, Haruki Takemoto, Eiji Kato