Patents by Inventor Yoshikatu Hashimoto

Yoshikatu Hashimoto 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: 5664542
    Abstract: On one side of a valve shaft, there are provided an accelerator drum connected to an accelerator pedal by an accelerator wire, a return spring for urging the accelerator drum in a valve closing direction, and an accelerator sensor for detecting rotation of the accelerator drum and transmitting a detected signal to a host system. On the other side of the valve shaft, there are provided a large-diameter gear and an opening sensor. An armature of a solenoid clutch is attached to the gear and held on a motor shaft via a slide bearing. Thus, the motor, the solenoid clutch and the throttle valve are arranged into a U-shaped form for interconnection through four gears.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: September 9, 1997
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Hiroshi Kanazawa, Fumio Tajima, Yasuhiko Honda, Yasushi Sasaki, Teruhiko Minegishi, Yoshikatu Hashimoto, Tatsuya Yoshida, Yuzo Kadomukai
  • Patent number: 5517966
    Abstract: On one side of a valve shaft, there are provided an accelerator drum connected to an accelerator pedal by an accelerator wire, a return spring for urging the accelerator drum in a valve closing direction, and an accelerator sensor for detecting rotation of the accelerator drum and transmitting a detected signal to a host system. On the other side of the valve shaft, there are provided a large-diameter gear and an opening sensor. An armature of a solenoid clutch is attached to the gear and held on a motor shaft via a slide bearing. Thus, the motor, the solenoid clutch and the throttle valve are arranged into a U-shaped form for interconnection through four gears.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: May 21, 1996
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co. Ltd.
    Inventors: Hiroshi Kanazawa, Fumio Tajima, Yasuhiko Honda, Yasushi Sasaki, Teruhiko Minegishi, Yoshikatu Hashimoto, Tatsuya Yoshida, Yuzo Kadomukai
  • Patent number: 5452697
    Abstract: A throttle valve control arrangement for an internal combustion engine comprising: a throttle valve; an electrical motor for actuating the throttle valve; mechanical links for coupling and decoupling the electrical motor with the throttle valve; a throttle position sensor for detecting a position of the throttle valve; and a control unit which compares an output signal from the throttle position sensor representing a detected throttle position with a signal representing a target throttle valve opening degree and generates a feed-back control signal for the electrical motor based on the comparison result, wherein the throttle position sensor shows a first output voltage characteristic with respect to throttle valve opening degrees for a first region covering ISC and FIC and a voltage gradient of the first output voltage characteristic is selected larger than that of an unmodified output voltage characteristic of the throttle position sensor, thereby a high resolution of the throttle position sensor is obtained
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: September 26, 1995
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Yasushi Sasaki, Yoshikatu Hashimoto, Teruhiko Minegishi, Tatsuya Yoshida, Mitsuru Kon'i, Norihiro Isozaki
  • Patent number: 5431141
    Abstract: On one side of a valve shaft, there are provided an accelerator drum connected to an accelerator pedal by an accelerator wire, a return spring for urging the accelerator drum in a valve closing direction, and an accelerator sensor for detecting rotation of the accelerator drum and transmitting a detected signal to a host system. On the other side of the valve shaft, there are provided a large-diameter gear and an opening sensor. An armature of a solenoid clutch is attached to the gear and held on a motor shaft via a slide bearing. Thus, the motor, the solenoid clutch and the throttle valve are arranged into a U-shaped form for interconnection through four gears.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: July 11, 1995
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Hiroshi Kanazawa, Fumio Tajima, Yasuhiko Honda, Yasushi Sasaki, Teruhiko Minegishi, Yoshikatu Hashimoto, Tatsuya Yoshida, Yuzo Kadomukai