Patents by Inventor Yukihiro Fukuda

Yukihiro Fukuda 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: 7213160
    Abstract: When causing a power saving mode to return by inputting a return signal, power is supplied to a device to which suppliance of power has been cut off. In this case, a power-saving control CPLD is masked to cancel an uncertain signal generated in the device under an intermediate potential at which the voltage of a power-saving-time power cutoff device, which supplies power to the device, is gradually rising. Thus, an erroneous operation caused by the uncertain signal can be prevented. Further, when the voltage of the power-saving-time power cutoff device reaches an operation-guaranteeing voltage, the power-saving control CPLD reads the uncertain signal again. Thereby, intrinsic characteristics of the uncertain signal can be verified, and a secure return operation can be implemented.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: May 1, 2007
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takenori Obara, Megumi Fukui, Yukihiro Fukuda
  • Patent number: 7017724
    Abstract: A clutch assembly for starting a vehicle without using a torque converter has a simple structure yet providing high reliability. In the clutch assembly, a clutch and a damper device are housed in a housing connected to a crank shaft of an engine. A boss serving as an output member is connected to an input shaft of an automatic transmission. An output of the engine is connected/disconnected to/from the input shaft upon engagement/disengagement of the clutch. The clutch includes a friction member and a piston fit oil tightly with the housing so as to apply pressure to the friction member. One end of the damper device is connected to a clutch hub, and the other end is connected to the output member. The clutch and the damper device are aligned on the axis of the housing.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: March 28, 2006
    Assignees: Aisin AW Co., LTD, Aisin AW Industries Co., LTD
    Inventors: Masahiro Hayabuchi, Kouji Maeda, Tomohiro Yamashita, Masahiro Yamaguchi, Yoshito Takeshita, Katsunori Tanaka, Yukihiro Fukuda
  • Publication number: 20040050647
    Abstract: A clutch assembly for starting a vehicle without using a torque converter has a simple structure yet providing high reliability. In the clutch assembly (11, 12, 13), a clutch (10) and a damper device (121, 122) are housed in a housing (2) connected to a crank shaft of an engine. A boss (30) serving as an output member is connected to an input shaft (28) of an automatic transmission. An output of the engine is connected/disconnected to/from the input shaft (28) upon engagement/disengagement of the clutch (10). The clutch (10) includes a friction member (14) and a piston (20) fit oil tightly with the housing (2) so as to apply pressure to the friction member (14). One end of the damper device (121, 122) is connected to a clutch hub (16), and the other end is connected to the output member (30). The clutch (10) and the damper device (121, 122) are aligned on the axis of the housing (2).
    Type: Application
    Filed: September 10, 2003
    Publication date: March 18, 2004
    Inventors: Masahiro Hayabuchi, Kouji Maeda, Tomohiro Yamashita, Masahiro Yamaguchi, Yoshito Takeshita, Katsunori Tanaka, Yukihiro Fukuda
  • Publication number: 20040015733
    Abstract: When causing a power saving mode to return by inputting a return signal, power is supplied to a device to which suppliance of power has been cut off. In this case, a power-saving control CPLD is masked to cancel an uncertain signal generated in the device under an intermediate potential at which the voltage of a power-saving-time power cutoff device, which supplies power to the device, is gradually rising. Thus, an erroneous operation caused by the uncertain signal can be prevented. Further, when the voltage of the power-saving-time power cutoff device reaches an operation-guaranteeing voltage, the power-saving control CPLD reads the uncertain signal again. Thereby, intrinsic characteristics of the uncertain signal can be verified, and a secure return operation can be implemented.
    Type: Application
    Filed: March 13, 2003
    Publication date: January 22, 2004
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Takenori Obara, Megumi Fukui, Yukihiro Fukuda
  • Patent number: 5730149
    Abstract: A toilet bowl-mounted urinalysis unit (14) adapted to be readily mounted to a standard water closet bowl fixture (12) for sampling and analysis of urine at a toilet. The unit (14) includes a substantially self-contained housing (22) which is designed to be mounted on the upper surface of the standard bowl fixture (12) between the bowl (16) and the flushing water supply section (18). Hinged to the housing (22) is a toilet seat (24) to which is mounted a urine sampling device (26) designed such that urine excreted into the bowl (16) is sampled in mid-air within the inner space of the bowl. The housing (22) receives a urinalysis device (50) with a polarographic flow cell and a syringe pump (52) for transferring a urine sample to the flow cell together with a carrier liquid. The polarographic flow cell has a working electrode supporting an enzyme. In one embodiment, a reservoir for the carrier liquid is received within the housing (22).
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: March 24, 1998
    Assignee: Toto Ltd.
    Inventors: Chiaki Nakayama, Kuniaki Shinohara, Takanori Matsuno, Toshio Koguro, Hiroshi Tsuboi, Yukihiro Fukuda, Naoki Sato
  • Patent number: 4856382
    Abstract: An automatic shift transmission for vehicles of the type in which the shifting of speed is automatically effected with a changeover valve having an orifice installed upstream thereof and a pilot type solenoid valve installed downstream thereof.A pressure reducing valve is provided upstream of the orifice.The amount of hydraulic oil consumed through the solenoid valve is possibly reduced.
    Type: Grant
    Filed: September 18, 1985
    Date of Patent: August 15, 1989
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Nishikawa, Takashi Aoki, Yoichi Sato, Yukihiro Fukuda
  • Patent number: 4729461
    Abstract: A method of controlling a direct-coupling mechanism of hydraulic power transmission device of an automatic transmission for an automotive vehicle, wherein the transmission capacity of the direct-coupling mechanism is controlled such that the valve of a predetermined parameter indicative of an amount of relative slip between input and output members of the hydraulic power transmission device which are mechanically engaged with each other by the direct-coupling mechanism lies within a predetermined reference range. The predetermined parameter value is detected and the detected value is compared with the predetermined reference range. A desired value of the predetermined reference range and a predetermined period of time are determined on the basis of the comparison result. The transmission capacity is controlled to the determined desired value for the determined predetermined period of time.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: March 8, 1988
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Nishikawa, Junichi Miyake, Yoshimi Sakurai, Yukihiro Fukuda
  • Patent number: 4700819
    Abstract: A method of controlling a direct-coupling mechanism of a hydraulic torque converter of an automatic transmission for an automotive vehicle, wherein the transmission capacity of the direct-coupling mechanism is controlled such that the value of a first predetermined parameter indicative of an amount of relative slip between input and output members of the hydraulic torque converter which are mechanically engaged with each other by the direct-coupling mechanism lies within a predetermined reference range. The value of a second predetermined parameter indicative of one of said plurality operating modes for the automotive vehicle is detected. Determined in dependence on the detected value of the second predetermined parameter is either the predetermined reference range of the value of the first predetermined parameter or a rate at which the transmission capacity is controlled such that the value of said predetermined parameter changes toward the predetermined reference range of the first predetermined parameter.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: October 20, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Nishikawa, Junichi Miyake, Yoshimi Sakurai, Yukihiro Fukuda
  • Patent number: 4696383
    Abstract: A frictionally engaging device for power transmission of a vehicle, has a first pressure chamber defined in part by one side of a piston urging frictionally engaging elements into engagement with each other, and a second pressure chamber defined in part by the other side of the piston for accommodating the frictionally engaging elements. A hydraulic pressure control arrangement controls operating fluid pressure supplied to the first pressure chamber at least to a value higher than a first predetermined value which causes engagement of the frictionally engaging elements and to a second predetermined value lower than the first predetermined value, which inhibits creeping of the frictionally engaging elements. When the operating fluid pressure is lower than the second predetermined value, a first valve opens to allow escape of the operating fluid from the second pressure chamber to the first pressure chamber.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: September 29, 1987
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Takashi Aoki, Yukihiro Fukuda, Masao Nishikawa
  • Patent number: 4688530
    Abstract: A control system for an accessory of an automobile includes an engine output detector for detecting the output of the engine of the automobile, a gear transmissioon coupled to the engine and responsive to detection of an idling condition of the automboile for selecting a neutral gear position, an accessory such as an air conditioner compressor drivable by the engine, a clutch disposed between the accessory and the engine for applying and cutting off the output of the engine to the accessory, a speed sensor for detecting the speed of travel of the automobile, a control circuit for comparing an actual running condition of the automobile with a prescribed running condition in which the output of the engine and the speed of the automobile are lower than respective prescribed levels, and for inhibiting operation of the accessory by disconnecting the clutch when the automobile is under the prescribed running condition.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: August 25, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Nishikawa, Takashi Aoki, Yoichi Sato, Yukihiro Fukuda
  • Patent number: 4686872
    Abstract: An automatic transmission includes a mechanical transmission mechanism coupled to a fluid coupling. The mechanical transmission mechanism has several power trains and several friction engagement mechanisms. By selective supply of actuating fluid pressure to selective ones of the friction engagement mechanisms, various speed stages are provided. A control system for this transmission includes a mechanism for producing a signal representative of engine output and an anti creep device for varying the actuating hydraulic fluid pressure for one of the friction engagement mechanisms which is engaged for providing the lowest speed stage, according to the signal representative of engine output, from a low value when engine output is low upward as engine output increases.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: August 18, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Takashi Aoki, Yoichi Sato, Yukihiro Fukuda
  • Patent number: 4625589
    Abstract: In a creep preventing device for vehicles equipped with an automatic transmission comprising: a fluid type torque converter; an auxiliary transmission having a frictionally engaging element for starting and connected to the torque converter; and a creep preventing valve disposed in an oil passage branched from an operating oil passage leading to the frictionally engaging element to communicate with an oil tank and adapted to open the oil passage during the idle operation of the vehicle, the improvement wherein the creep preventing valve includes an oil chamber for closing the valve when oil pressure above a predetermined level is introduced thereto, and an oil passage for guiding the oil pressure from an engine output proportional signal pressure generating means, which releases the signal pressure proportional to the engine output, is connected to the oil chamber, whereby the engaging force of the clutch for starting can be controlled in an analog fashion to ensure the smooth reengaging operation of the clut
    Type: Grant
    Filed: March 29, 1984
    Date of Patent: December 2, 1986
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Nishikawa, Takashi Aoki, Yoichi Sato, Yukihiro Fukuda
  • Patent number: 4603604
    Abstract: A creep-inhibiting device for use in an automotive vehicle equipped with an engine and a transmission mechanism coupled in series to a fluid coupling and having a frictionally engaging element. The device includes engine load sensor means for producing a signal fluid having a pressure representative of engine load, control means interposed between the frictionally engaging element and an operating fluid source, and a fluid line for delivering the signal fluid from the engine load sensor means to the control means. The control means is adapted to control the power transmission capacity of the frictionally engaging element within a range from substantially zero to a predetermined value in dependence on the signal fluid pressure supplied thereto, to inhibit creeping of the vehicle when the engine is in a no-load state.
    Type: Grant
    Filed: February 5, 1985
    Date of Patent: August 5, 1986
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Masao Nishikawa, Yoichi Sato, Yukihiro Fukuda
  • Patent number: 4603601
    Abstract: A direct-coupling controller for a torque converter direct-coupling clutch in an automatic transmission. The controller includes a pilot oil pressure operated timing valve which interconnects the hydraulic cylinders of at least two of the hydraulically operated friction elements of the transmission to the hydraulic-cylinder of the direct-coupling clutch. The timing valve has two positions, a first where one of the friction elements is connected to the clutch and a second where the other is. Structure can be provided to delay movement of the timing valve spool member for a predetermined time. Additionally, a reduction valve can be interposed between the timing valve and the clutch to keep the oil pressure to the clutch at a predetermined level. A vehicle speed response valve can also be interposed between the timing valve and the clutch in parallel with the reduction valve to bypass the reduction valve when the vehicle speed exceeds a predetermined value.
    Type: Grant
    Filed: August 15, 1984
    Date of Patent: August 5, 1986
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Nishikawa, Shinzo Sakai, Yoichi Sato, Yukihiro Fukuda