Patents by Inventor Hideyasu Takefuta

Hideyasu Takefuta 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: 5295923
    Abstract: A parallel-axis gear differential includes pairs of element gears (34) mounted within pockets (36) formed in a differential housing (10). Each element gear includes a first gear section (38) for meshing with one of two side gears (30 or 32), a second gear section (40) for meshing with the first gear section of its mating element gear, and a stem section (42) for interconnecting the first two gear sections. Associated with each pair of pockets are two passageways (44, 46) for providing respective paths for the flow of lubrication fluid between the exterior of the housing and the respective meshing gear sections (38, 40) of each pair of element gears (34). Further, the shape of each pair of pockets (36) is modified between its apron portions (a) and its opening (b) to increase the space between the pocket and the mating surfaces of the element gears.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: March 22, 1994
    Assignee: Zexel-Gleason USA, Inc.
    Inventor: Hideyasu Takefuta
  • Patent number: 5195934
    Abstract: A differential device includes a pair of propeller shafts extending into a housing, a pair of side gears connected respectively to the propeller shafts, and at least one pair of element gears having screw gear portions meshing respectively with screw gear portions of the side gears. The element gears have respective coupling gear portions meshing with each other. In order to improve a drive torque distribution, either pitch diameters or helix angles of the screw gear portions of the two side gears are different from each other. In order to reduce the overall diameter of the differential device, a spline portion and the screw gear portion of at least one of the two side gears are spaced from each other along an axis of the side gear, the spline portion serving to connect the side gear to the mating propeller shaft.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: March 23, 1993
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Shiro Ichiki, Hideyasu Takefuta
  • Patent number: 5040418
    Abstract: An acceleration sensor includes a body supporting a casing within which a magnetic member is received. A plurality of magnets are mounted on the body and disposed around the casing. The magnetic forces of the magnets hold the magnetic member in a reference position within the casing. The magnetic member is displaceable from the reference position against the magnetic forces of the magnets when the acceleration sensor is subjected to acceleration. A detection device is mounted externally of the casing so as to detect displacement of the magnetic member from the reference position. The acceleration sensor further includes a position adjusting device for adjusting the position of at least one of the magnets relative to the casing so as to set the intensities of the magnetic fields of the magnets in predetermined relation within the casing.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: August 20, 1991
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Takeo Kushida, Hideyasu Takefuta, Hajime Muramatsu
  • Patent number: 5005412
    Abstract: An acceleration sensor includes a body supporting a casing within which a magnetic member is received. A plurality of magnets are mounted on the body and disposed around the casing. The magnetic forces of the magnets hold the magnetic member in a reference position within the casing. The magnetic member is displaceable from the reference position against the magnetic forces of the magnets when the acceleration sensor is subjected to acceleration. A detection device is mounted externally of the casing so as to detect displacement of the magnetic member from the reference position. The acceleration sensor further includes a position adjusting device for adjusting the position of at least one of the magnets relative to the casing so as to set the intensities of the magnetic fields of the magnets in predetermined relation within the casing.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: April 9, 1991
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Takeo Kushida, Hideyasu Takefuta, Hajime Muramatsu
  • Patent number: 4662491
    Abstract: In a vehicle clutch control apparatus having an actuator for operating a friction clutch and a controller for controlling the actuator, whereby a first data representing a semi-engaging zone is obtained by the controller just after the engine is started and the vehicle is driven to move, the apparatus has a data generator for producing a second data relating to the magnitude of the load of the vehicle and a unit for correcting the first data in accordance with the second data. As a result, data representing the actual semi-engaging zone of the clutch depending upon the load conditions of the vehicle at that time can be obtained, so that it becomes possible to realize an appropriate semi-engaging operation even when the load of the vehicle has changed.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: May 5, 1987
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Hideyasu Takefuta, Tatsuya Seshima
  • Patent number: 4662494
    Abstract: An automatic transmission system has a controllor for controlling the slip rate of a clutch in accordance with the amount of depression of an accelerator pedal instead of controlling the ON/OFF condition of the clutch by a control signal when it is discriminated that the gear change position of a transmission and the amount of depression of the accelerator pedal are in the predetermined states. In a predetermined condition, the slip rate of the clutch is adjusted in accordance with the amount of depression of the accelerator pedal so as to put the clutch in a semi-engaged condition, thereby enabling the speed of the vehicle to be controlled within a very low speed range simply by operation of the accelerator pedal.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: May 5, 1987
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Michio Wakiya, Hideyasu Takefuta, Hiromi Kono
  • Patent number: 4645045
    Abstract: A vehicle automatic transmission system including a speed-change-gear type transmission has a signal generator which has an selecting lever movable along a predetermined gear shift pattern used for manual operation and generates a command signal showing the position of the selecting lever on the gear shift pattern and a controller responsive to the command signal to automatically perform an automatic gear change operation of the speed-change-gear type transmission, whereby the driver can carry out the commanding operation for gear change with the same feeling as in manual operation of a conventional speed-change-gear box.
    Type: Grant
    Filed: February 20, 1985
    Date of Patent: February 24, 1987
    Assignee: Diesel Kiki Co., Ltd.
    Inventor: Hideyasu Takefuta
  • Patent number: 4546736
    Abstract: A fuel supply control system for an internal combustion engine has first and second step motor drivers for driving a step motor operatively coupled to a fuel supply control means such as a throttle valve. An initial step position setting memory stores an initial preset step position of the step motor, and a target step memory stores a target step position of the step motor dependent on an accelerator pedal position. A driver selector selects the first step motor driver for driving the step motor to the initial preset step position in response to a signal from a power-on detector, and selects the second step motor driver for driving the step motor to the target step position in response to a signal from an engine self-operation detector.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: October 15, 1985
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Kouichi Moriya, Kouki Iwata, Hideyasu Takefuta
  • Patent number: 4450942
    Abstract: A centrifugal clutch mechanism couples a first driven element to a drive element for rotary torque transmission at a first speed range from a rotary drive source to a load when the rotation of the drive source is lower than a predetermined reference speed. The centrifugal clutch mechanism includes a double-arm coupling lever pivoted to the drive element, a clutch pad or shoe pivoted to one end of the coupling lever and having a surface engagable with an inner surface of the first driven element, and a pair of centrifugal weights carried on the other end of the coupling lever. At least one flat spring is yieldably fastened to the weight or to a stop rigid on the drive element to be frictionally engaged by the stop or the weight, thereby resisting frictional oscillation of the clutch shoe on the coupling lever during a transition range between completely coupled and completely uncoupled mode of operation of the centrifugal clutch.
    Type: Grant
    Filed: July 15, 1981
    Date of Patent: May 29, 1984
    Assignee: Diesel Kiki Company, Ltd.
    Inventors: Hideyasu Takefuta, Akira Shinoda
  • Patent number: 4273226
    Abstract: Input and output member (21), (28) and a clutch disc (32) are coaxially rotatable relative to each other, the clutch disc (32) being frictionally engageable with the input member (21). A coil-wound spring (33) is wound around the input member (21) and connected at its ends to the clutch disc (32) and output member (28). An electromagnetic coil (26) may be energized to attract the clutch disc (32) into frictional engagement with the input member (21), causing the coil-wound spring (33) to tightly wind around the input member (21) and drivably connect the input member (21) to the output member (28). A generally tubular cover (34) surrounds the coil-wound spring (33), the spring means (40) moving the clutch disc (32) toward engagement with the cover (34) when the coil (26) is de-energized.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: June 16, 1981
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Hideyasu Takefuta, Akira Shinoda, Teruyoshi Shibauta
  • Patent number: 4262787
    Abstract: Input and output members (19), (28) and a clutch disc (32) are coaxially rotatable relative to each other, the clutch disc (32) being frictionally engageable with the input member (19). A coil-would spring (33) is wound around the input member (19) and connected at its ends to the clutch disc (32) and output member (28). An electromagnetic coil (26) may be energized to attract the clutch disc (32) into frictional engagement with the input member (19), causing the coil-wound spring (33) to tightly wind around the input member (19) and drivably connect the input member (19) to the output member (28). A spring (41) quickly and smoothly disengages the clutch disc (32) from the input member (19) when the coil (26) is de-energized. A plurality of pins (36) extending through the clutch disc (32) ensure parallel movement of the clutch disc (32) toward and away from the input member (19).
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: April 21, 1981
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Hideyasu Takefuta, Toshio Yamaguchi
  • Patent number: 4225027
    Abstract: Rotary input and output members (19), (28) are axially aligned with each other and a rotary clutch disc (32) is axially aligned with and frictionally engageable with the input member (19). A coil-wound spring (33) is wound around the input and output members (19), (28) and connected at its ends to the clutch disc (32) and output member (28) respectively. An electromagnetic coil (26), which energized, attracts the clutch disc (32) into frictional engagement with the input member (19) and causes the coil-wound spring (33) to tightly wind around and embrace the input and output members (19), (28), thereby drivingly connecting the same together.
    Type: Grant
    Filed: September 14, 1978
    Date of Patent: September 30, 1980
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Hideyasu Takefuta, Kohki Iwata, Toshio Yamaguchi