Patents by Inventor Takashi Mizuno

Takashi Mizuno 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: 6260651
    Abstract: The present invention simplifies assembly of a vehicle starting device and facilitates arrangement design. A vehicle starting device 3 has a card receiving portion 4 and a main mechanism 5 connected with each other integrally. The card receiving portion 4 includes an inclinable inner case 7 in which an integrated circuit (IC) card is inserted. The card receiving portion 4 also includes a roller 9 and a release mechanism 16 for releasing the IC card. The roller 9 is lifted by the insertion of the IC card. The release mechanism 16 releases the IC card from the card receiving portion 4. The main mechanism 5 has a knob 23 and a steering shaft lock 33. A card release prevention mechanism 24, an ejector lever 25 for actuating the release mechanism 16, and a cooperative unlocking mechanism 30 are provided between the main mechanism 5 and the card receiving portion 4.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: July 17, 2001
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Sadao Kokubu, Takashi Mizuno
  • Patent number: 6212450
    Abstract: When an engine is started with a key 19A inserted in an ignition key cylinder of a vehicle 11, a vehicle-side controller 12 transmits operational data to the key 19A and stores in the key 19A. Further, when a personal computer 30 is operated with the key 19A inserted in an R/W device 31, the R/W device 31 reads the operational data from the key 19A and transfers to the personal computer 30. In this structure, when a storage capacity of the key 19A becomes full, the vehicle-side controller 12 stores the operational data in a storage portion of its own, and when the key 19A is initialized, the stored operational data is written in the key 19A. For this reason, even when initialization of the key 19A is difficult, deletion of the operational data is prevented.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 3, 2001
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 6075453
    Abstract: A vehicular door lock control apparatus for unlocking a door lock mechanism includes a key for performing a first unlocking operation and a second unlocking operation. A door key cylinder is actuable to an unlock position by using the key. The key is insertable into the door key cylinder. A transmitter-receiver is disposed at the key, and transmits an answer signal that indicates a specific identification code upon receipt of at least one of a power signal and an inquiry signal. An operating force transmission mechanism, actuable between a transmission mode and a non-transmission mode, transmits an unlocking force applied by the key during the second unlocking operation to the door lock mechanism when in the transmission mode.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: June 13, 2000
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 5886421
    Abstract: A vehicle start-up permission device in which an identification code stored in an electronic key can be kept secret. A start-up permission ECU (1) is magnetically coupled with a transmit-receive controlling circuit (6) of an electronic key (3) via an antenna (2) and an antenna (5) of the electronic key (3) with the electronic key (3) being inserted in an ignition key (4) so as to supply electric power for the circuit. When the ignition switch (4) is operated to an ACC position, the start-up permission ECU (1) transmits a random number code. When the transmit-receive controlling circuit (6) of the electronic key (3) receives the random number code, it converts by predetermined encryption processing a previously registered key code to a return code on the basis of the random number code and returns the return code.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: March 23, 1999
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki Seisakusho
    Inventors: Yoshiyuki Mizuno, Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 5864302
    Abstract: A transmitting and receiving system including, a transponder always maintains a transmission function even if circuit constants of circuit elements are deviated or such circuit constants are shifted in association with temperature changes. The transponder includes a transponder coil electromagnetically coupled to an antenna coil through which a response signal is transmitted, a resonance capacitor, a main modulation circuit including a first modulation capacitor, and a supplemental modulation circuit including a second modulation capacitor whose static capacitance value is different from that of the first modulation capacitor. A response signal is transmitted in changing an impedance of a transmitting and receiving portion by the main modulation circuit when a question signal is received and by the supplemental modulation circuit when a correction command signal is received.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: January 26, 1999
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 5844990
    Abstract: The invention relates to a transmission-reception system, particularly a transmitter-receiver device contained in the bow of an ignition key. When a resonance circuit receives a carrier wave signal from a transmission-reception ECU of a motor vehicle, a microcomputer is switched to an active state by the output of a power circuit that smoothes and rectifies the carrier wave signal. A detector circuit discriminates an enquiry signal supplied together with the carrier wave signal through the resonance circuit portion, and outputs the signal to the microcomputer. In response to the enquiry signal together with random number data, the activated microcomputer changes the bit length of an identification code stored in an EEPROM, on the basis of the received random number data and a predetermined function, and performs the on-off control of an FET of a modulating circuit in a mode corresponding to the bit length-changed identification code.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: December 1, 1998
    Assignee: Tokai-Rika-Denki-Seisakusho Kabushiki Kaisha
    Inventors: Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 5838254
    Abstract: The invention relates to a transmission-reception system. A transponder receiver unit contained in the key bow of an ignition key has a power circuit that receivers, rectifies and smoothes the carrier wave signal transmitted together with a time reference signal and an enquiry signal from the transmission-reception ECU of a motor vehicle. A microcomputer in the transponder becomes active when the output voltage of the power circuit reaches a predetermined level or higher. When activated, the microcomputer measures the time length of the received reference time signal using the clock signal generated by an oscillation circuit, and calculates a ratio, as a correction coefficient, between the measured time length and a stored reference time value. The microcomputer decodes the enquiry signal while correcting the time information included in the time series pulse signal forming the enquiry signal, using the correction coefficient.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: November 17, 1998
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 5823028
    Abstract: A key-operated cylinder device includes a cylinder device body into which a key having a secondary coil is inserted, the cylinder device body including a coil mounting portion forming the front end portion of said cylinder device body; a primary coil mounted in said coil mounting portion, the primary coil wound on a coil bobbin; and shielding device for preventing the magnetic flux of the primary coil from flowing into the cylinder device body, the shielding device being arranged between the coil mounting portion and the primary coil.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: October 20, 1998
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takashi Mizuno, Sadao Kokubu, Hisashi Aoki, Yoshiyuki Mizuno
  • Patent number: 5774043
    Abstract: When an ignition switch detects that a key rotor of an ignition key cylinder has been turned to the accessory position by a key, a controller energizes a primary coil to cause it to output a high-frequency signal. In the key, a secondary battery is charged with a constant DC voltage generated from an AC voltage induced across a secondary coil. A transmission circuit is powered by the secondary battery, and allowed by a timer circuit to transmit a radio signal including an identification code during a predetermined period after the high-frequency signal is received by the key. Alternatively, the controller energizes the primary coil plural times with a cycle consisting of predetermined output and pause periods if the transmitted identification code does not coincide with a preset identification code at the first comparing attempt.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: June 30, 1998
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Yoshiyuki Mizuno, Sadao Kokubu, Hisashi Aoki, Takashi Mizuno
  • Patent number: 5745026
    Abstract: In a vehicular communication system, a microcomputer of a transmission-reception electronic control unit (ECU) transmits stored data via an antenna coil to a transceiver disposed in an ignition key when the ignition key is inserted in an ignition key cylinder of a vehicle. During communication with the transceiver, the microcomputer outputs a key interlock actuating signal. While the key interlock actuating signal is being inputted to a key interlock control circuit, the key interlock control circuit operates a key interlock actuator to prevent the ignition key cylinder from being turned to a position at which the ignition key may be freely removed from the ignition key cylinder. Thus, the ignition key is prevented from being removed from the ignition key cylinder during communication between the ignition key transceiver and the microcomputer, thereby ensuring that data about the vehicle will be stored in a reception device disposed in the ignition key without a failure.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: April 28, 1998
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Sadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga
  • Patent number: 5727408
    Abstract: A key device includes a signal processing device for generating a signal containing specific information, a key plate having a stem and fitting device for fitting the signal processing device and the stem, the fitting device provided with the stem and the signal processing device, the fitting device of the signal processing device being formed while preliminarily resin-molding.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takashi Mizuno, Sadao Kokubu, Hisashi Aoki, Shinichi Koga, Yoshiyuki Mizuno
  • Patent number: 5688294
    Abstract: A stepped insulating ring having a large-diameter upper portion, a small-diameter foot portion, and a step portion formed on the inside is inserted from a top opening of a bottomed cylindrical can containing a plate group and electrolyte and the small-diameter foot portion is set onto the plate group,a peripheral portion of a cover in which a safety valve is incorporated is set onto the step portion of the stepped insulating ring, and the areas to be sealed where an inside wall of top opening of the bottomed cylindrical can faces an outside wall of the large-diameter upper portion of the stepped insulating ring and an inside wall of the large-diameter upper portion faces a peripheral portion of the cover is formed, andwhen crimping operation on said areas to be sealed is performed from the outside of the upper part of the bottomed cylindrical can to form a closed construction,a sealing compound consisting of oily bitumen, organic solvent, and paraffin base oil is applied to the areas where an inside wall of t
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: November 18, 1997
    Assignee: Furukawa Denchi Kabushiki Kaisha
    Inventors: Takashi Mizuno, Yukinari Kondo, Masanori Suzuki
  • Patent number: 5614554
    Abstract: The present invention provides a reverse transcriptase inhibitor and an antiviral agent comprising at least one member selected from the group consisting of sulfated tyrosines and physiologically acceptable salts thereof as an effective component; and exhibiting less toxicity and a remarkable inhibitory effect against a reverse transcriptase existing in viruses as well as a remarkable anti-AIDS viral activity.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 25, 1997
    Assignee: Nippon Flour Mills Co., Ltd.
    Inventors: Keijiro Uchino, Takashi Mizuno, Sachie Murakami, Hideki Nakashima, Naoki Yamamoto, Hiroshi Ogawara
  • Patent number: 5612650
    Abstract: A microcomputer includes therein an operation control part which can be operated when a clock signal is applied thereto by an oscillation circuit. If the operation control part reads out an identification code from an EEPROM, then it switches a control signal to be given to a switching element in accordance with the levels of the respective bits. When the control signal is off, the oscillation frequency of the oscillation circuit is F1. On the other hand, if the control signal is turned on, then one terminal of a capacitor is grounded to thereby switch the oscillation frequency over to F2. The clock signal is divided by a frequency dividing circuit before it is output. The frequency of the output signal after being divided becomes f1 or f2 in accordance with the above switching and the output signal is transmitted in the form of a frequency modulation signal.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: March 18, 1997
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takashi Mizuno, Sadao Kokubu, Hisashi Aoki, Yoshiyuki Mizuno, Shinichi Koga
  • Patent number: 5483219
    Abstract: It is an object of the invention to provide a vehicle alarm signal generation device which can realize the reduction of the consumption of power without unstabilizing the intruder detect operation. The vehicle alarm signal generation device includes a supersonic sensor which comprises a supersonic transmitter and a supersonic receiver. The supersonic transmitter radiates supersonic waves in the interior of a vehicle and the radiated supersonic waves are received by the supersonic receiver. If any person intrudes on the vehicle interior, then there is produced a difference between the frequencies of the radiated and received supersonic waves due to the Doppler effect generated responsive to the movements of the intruder, so that a beat frequency signal corresponding to the frequency difference is included in a signal received by the supersonic receiver. The beat frequency signal is integrated by an integrating circuit and is then converted into a voltage signal.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: January 9, 1996
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Hisashi Aoki, Sadao Kokubu, Yoshiyuki Mizuno, Takashi Mizuno
  • Patent number: 5464654
    Abstract: A hydrogen-occlusion electrode and a method of manufacturing the electrode are described. The hydrogen-occlusion electrode comprises from about 42-84 vol. % of a hydrogen-occlusion alloy, from about 3-13 vol. % of a bonding material, from about 3-15 vol. % of an electroconductive material, and has residual pores in an amount of 10-30 vol. %. The electroconductive material has an average particle size of 1.3 .mu.m or less. The bonding material is preferably polyvinylidene fluoride (PVdf). In manufacturing the foregoing hydrogen-occlusion electrode, a formed electrode plate body including PVdF as a bonding material is heat-treated in a vacuum or inert gas atmosphere at a temperature ranging from about 160.degree. C. to about 200.degree. C. An electrode is thereby obtained wherein the alloy particles are prevented from separating from the electrode resulting in an improvement of mechanical strength and electroconductivity in the electrode.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: November 7, 1995
    Assignee: Furukawa Denchi Kabushiki Kaisha
    Inventor: Takashi Mizuno
  • Patent number: 5360687
    Abstract: A hydrogen-occlusion electrode and a method of manufacturing the electrode are described. The hydrogen-occlusion electrode comprises from about 42-84 vol. % of a hydrogen-occlusion alloy, from about 3-13 vol. % of a bonding material where the volume percent is based on 100% from about 3-15 vol. % of an electroconductive material, and has residual pores in an amount of 10-30 vol. %. The electroconductive material has an average particle size of 1.3 .mu.m or less. The bonding material is preferably polyvinylidene flouride (PVdf). In manufacturing the foregoing hydrogen-occlusion electrode, a formed electrode plate body including PVdF as a bonding material is heat-treated in a vacuum or inert gas atmosphere at a temperature ranging from about 160.degree. C. to about 200.degree. C. An electrode is thereby obtained wherein the alloy particles are prevented from separating from the electrode resulting in an improvement of mechanical strength and electroconductivity in the electrode.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: November 1, 1994
    Assignee: Furukawa Denchi Kabushiki Kaisha
    Inventor: Takashi Mizuno
  • Patent number: 5004352
    Abstract: A plasticizing screw for an injection molding machine or the like having one or more lands in a crest portion of a screw flight to prevent the screw flight from coming into contact with a cylinder wall surface when the plasticizing screw is rotated during a molding operation. The land has a smaller diameter than that of a crest portion of the screw flight and is provided at the screw flight crest portion either between leading and trailing surfaces of the screw flight or extending from the leading edge of the screw flight. The land can also be provided as a plurality of circumferentially spaced-apart lands on the side of a front surface of the screw flight, or provided at a central portion between the leading and trailing surfaces of the screw flight.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: April 2, 1991
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Yukio Tamura, Kiyoshi Kinoshita, Tetsuo Uwaji, Takashi Mizuno
  • Patent number: 4727818
    Abstract: An automatic embroidery machine operated according to stitch data stored in a memory device provides a secondary central processing unit, a secondary random access memory, and a secondary code input means such that subsequent stitch data may be input during current stitch work thereby increasing the work efficiency of the embroidery machine.
    Type: Grant
    Filed: September 17, 1986
    Date of Patent: March 1, 1988
    Assignee: Tokyo Juki Industrial Co., Ltd.
    Inventors: Takashi Mizuno, Akihiro Kobayashi
  • Patent number: 4674420
    Abstract: An automatic embroidery machine capable of switching to stitch urgently required patterns although the machine is scheduled to stitch patterns previously input through a central processing unit from random access memory. The urgently required patterns are given priority by input of a priority code, a discrimination code corresponding to the required pattern, a stop code, etc., during current stitch work.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: June 23, 1987
    Assignee: Tokyo Juki Industrial Co., Ltd.
    Inventors: Takashi Mizuno, Akihiro Kobayashi