Patents by Inventor Hiroshi Sugiyama

Hiroshi Sugiyama 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: 5573878
    Abstract: A triphenylamine derivative, a charge-transporting material comprising the triphenylamine derivative, and an electrophotographic photoreceptor containing a charge-transporting layer comprising the triphenylamine derivative are disclosed, wherein the triphenylamine derivative is represented by the following general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom, or an aryl group which may have a substituent, or R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 may be taken together to form a ring, and n represents 0 or 1.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: November 12, 1996
    Assignee: Takasago International Corporation
    Inventors: Toshimitsu Hagiwara, Hiroshi Sugiyama, Yoshimasa Matsushima, Tohru Kobayashi
  • Patent number: 5567560
    Abstract: A triphenylamine derivative, a charge-transporting material comprising the triphenylamine derivative, and an electrophotographic photoreceptor containing a charge-transporting layer comprising the triphenylamine derivative are disclosed, wherein the triphenylamine derivative is represented by the following general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom, or an aryl group which may have a substituent, or R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 may be taken together to form a ring, and n represents 0 or 1.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: October 22, 1996
    Assignee: Takasago International Corporation
    Inventors: Toshimitsu Hagiwara, Hiroshi Sugiyama, Yoshimasa Matsushima, Tohru Kobayashi
  • Patent number: 5521042
    Abstract: A 1,4-bis(2',2'-diphenylvinyl)benzene derivative represented by formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represents a different lower alkyl group and Me represents a methyl group, a charge transporting material containing the compound (I), and an electrophotographic photoreceptor comprising a charge transporting layer containing the charge transporting material are disclosed.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: May 28, 1996
    Assignee: Takasago International Corporation
    Inventors: Yoshimasa Matsushima, Hiroshi Sugiyama, Toshimitsu Hagiwara
  • Patent number: 5517222
    Abstract: An ink jet recording apparatus which has at least one ink jet recording head to perform recording on a recording medium held on a rotary drum by discharging liquid ink from discharging nozzles, comprises a receptor, arranged on the rotary drum at a position which does not overlap with a position at which a recording medium is placed, for receiving ink droplets discharged by the ink jet recording head not for recording.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: May 14, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Sugiyama, Kousuke Yamamoto, Yoshitaka Okamura, Jun Ashiwa
  • Patent number: 5485187
    Abstract: An ink-jet recording apparatus capable of efficiently performing a pressurization recovery operation on a recording head without causing clogging due to dust particles. An ink supply system for supplying ink to the head includes an ink container with an air space defined above the ink surface, and a pump for pressurizing air within the air space, which pump is arranged to connect the air space with either the pressure side of the pump or the atmosphere. In one embodiment, the ink container compriss a main ink tank, and an auxiliary ink tank, having the air space, provided between the head and the main ink tank. The main ink tank is controlled to maintain a predetermined pressure head of ink therein, and the auxiliary ink tank is positioned such that the auxiliary ink tank can have, under atmospheric pressure, substantially the same pressure head as the main ink tank. In another embodiment, a removable ink cartridge, serving as the ink container, is divided into small and large ink chambers.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: January 16, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Okamura, Hiroshi Sugiyama, Kousuke Yamamoto
  • Patent number: 5454976
    Abstract: A ferroelectric liquid crystal composition exhibiting a chiral smectic C phase, in which the tilt angle with an electric field applied is from 12.degree. to 18.degree. and the tilt angle during memory is from 8.degree. to 15.degree., and a liquid crystal display device are disclosed. The composition has high memory effects, high display contrast, and high rate of reponse.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: October 3, 1995
    Assignee: Takasago International Corporation
    Inventors: Misao Yagi, Hitoshi Kondo, Mika Tadokoro, Hiroko Konuma, Hiroshi Sugiyama, Toshimitsu Hagiwara
  • Patent number: 5290477
    Abstract: An optically active compound represented by formula (I): ##STR1## wherein R.sup.1 represents an alkyl group having from 3 to 9 carbon atoms; R.sup.2 represents an alkyl group having from 3 to 7 carbon atoms; m and n each represent 1 or 2 provided that they do not simultaneously represent 1; and C.sup.*1 and C.sup.*2, both represent an optically active carbon atom, and a liquid crystal composition containing the same are disclosed. The compound exhibits chiral nematic and smectic phases and are excellent as a chiral dopant for ferroelectric liquid crystal compositions or nematic liquid crystal compositions.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: March 1, 1994
    Assignee: Takasago International Corporation
    Inventors: Hitoshi Kondo, Mika Tadokoro, Hiroshi Sugiyama, Toshimitsu Hagiwara, Takashi Imai, Mamoru Yamada, Keisuke Itakura
  • Patent number: 5275756
    Abstract: A fluorine-containing optically active compound represented by formula (I): ##STR1## wherein R.sub.1 represents a straight chain alkyl or alkoxy group having from 6 to 14 carbon atoms or a 4-alkylphenyl or 4-alkoxyphenyl group having from 8 to 12 carbon atoms; R.sub.2 represents a straight chain alkyl group having from 1 to 8 carbon atoms; C.sup.* represents an asymmetric carbon atoms; and X represents a hydrogen atom or a fluorine atom, provided that X represents a fluorine atom when R.sub.1 contains a phenyl group, and a liquid crystal composition containing the same are disclosed. The compound (I) has large spontaneous polarization and low viscosity to achieve a fast response time. In the N.sup.* phase of the compound (I), the helical pitch has small temperature dependence.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: January 4, 1994
    Assignee: Takasago International Corporation
    Inventors: Akio Yamaguchi, Shigeru Mitsuhashi, Mamoru Yamada, Minzo Sakaguchi, Hiroshi Sugiyama, Hiroko Konuma, Hitoshi Kondo, Toshimitsu Hagiwara
  • Patent number: 5272512
    Abstract: An apparatus for detecting velocity of an object, includes a light source for generating light having a wavelength .lambda., a light-transmission block for receiving the light from the light source, and guiding the light onto the object, and a photosensor for detecting the light from the object on which the light from the light-transmission block is incident. The light-transmission block is integrally constituted by a diffraction grating for diffracting the light from the light source to produce two diffraction lights, and an optical element for causing the two diffraction lights from the diffraction grating to be incident onto the object at a predetermined incident angle. The diffraction grating and the optical element are arranged so as to have substantially constant sin.theta./.lambda. independently of a change in wavelength .lambda. of the light from the light source where .theta. is the incident angle of each diffraction light onto the object.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: December 21, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidejiro Kadowaki, Hiroshi Sugiyama, Yasuhiko Ishida, Makoto Takamiya
  • Patent number: 5256885
    Abstract: An apparatus for detecting the velocity information of an object comprises a light source; optical system for irradiating beam from the light source, which is provided with a first lens or lens group and a second lens or lens group having an identical focal distance which are arranged apart from each other substantially two times such focal distance along the direction of the optical axis, to irradiate the beam onto the measuring object through the first and second lenses or lens group, and the optical system being arranged so as to make the value of sin .theta./.lambda. substantially constant where .theta. is the incident angle of the beam irradiated onto the measuring object and .lambda. is the wavelength of the beam; and detector for detecting the scattering rays of light from the measuring object irradiated by the above-mentioned optical system to detect the velocity information of the measuring object.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: October 26, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Takamiya, Hidejiro Kadowaki, Yasuhiko Ishida, Hiroshi Sugiyama
  • Patent number: 5229830
    Abstract: An apparatus for detecting the speed information of an object comprises a light source device, a frequency shifting device for shifting the frequency of a light flux from the light source device, a light-flux dividing device for dividing a light-flux whose frequency is divided by the frequency shifting device, one of the divided light fluxes divided by the light-flux dividing device being projected onto an object to be measured and the other light flux being projected in a direction other than that of the one of the light fluxes, a first detection device for detecting light from the object to be measured to which the one of the light fluxes is projected, the light detected by the first detection device having undergone a Doppler shift proportional to the speed of the object to be measured, a second detection device for detecting the other light flux, and a speed information detection device for detecting the speed information of the object to be measured on the basis of the comparison between the detection re
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: July 20, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiko Ishida, Makoto Takamiya, Hidejiro Kadowaki, Hiroshi Sugiyama
  • Patent number: 5216478
    Abstract: A Doppler velocity meter has a radiation source for emitting a radiation beam the wavelength of which fluctuates, such as a laser; an optical system for directing the radiation beam to an object at an incident angle .theta. and a detector for detecting scattered beam generated from the object by directing the radiation beam. The optical system has a diffraction grating which serves to change the incident angle .theta. in accordance with a change in the wavelength .lambda. of the radiation beam in such a manner as to maintain the value of sin .theta./.lambda. substantially constant. The velocity meter can accurately detect the velocity of movement of the object regardless of any change in the wavelength .lambda., because the diffraction grating serves to substantially compensate for any change in the frequency of the scattered beam caused by the change in the wavelength.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: June 1, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidejiro Kadowaki, Ken Tsuchii, Makoto Takamiya, Kosuke Yamamoto, Masafumi Wataya, Toshiyuki Yanaka, Haruhiko Takahashi, Hiroshi Sugiyama, Yasuhiko Ishida
  • Patent number: 5194745
    Abstract: An apparatus for detecting the velocity information of an object comprises the irradiation optical system for performing the irradiation of beam to the predetermined position on an object to be measured; the photodetector for detecting the light from the irradiated object by the irradiation optical system, the velocity information being obtained by the detection; the detector for detecting the irradiating state for detecting the deviation of the irradiating position of the beam on the object to be measured; and the adjuster for adjusting the irradiating state of the beam on the object based on the detection result of the detector for detecting the irradiating state. With such constituents as above, the apparatus is capable of dealing with the fluctuation of the lightning to obtain a high-precision detection of the velocity information at a high speed.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: March 16, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Takamiya, Yasuhiko Ishida, Hidejiro Kadowaki, Hiroshi Sugiyama, Ken Tsuchii, Kosuke Yamamoto
  • Patent number: 5179418
    Abstract: This invention is characterized in that a light beam from a light source is made to enter a diffraction grating and .+-. nth-order (n=1,2, . . . ) diffracted lights from the diffraction grating are made to enter a moving object at an angle substantially equal to the angle of intersection of the angles of diffraction of the two diffracted lights from the diffraction grating. As a result, the two diffracted lights are converged by a lens system provided between the diffraction grating and the light source on the moving object and intersect with each other. Scattered light subjected to Doppler shift by the moving object is detected by photodetector thereby detecting the velocity information of the moving object.
    Type: Grant
    Filed: May 21, 1991
    Date of Patent: January 12, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Takamiya, Hiroshi Sugiyama, Yasuhiko Ishida, Hidejiro Kadowaki
  • Patent number: 4992805
    Abstract: An apparatus for recording an image on a recording medium comprises a platen, a recording head arranged to oppose said platen for recording the image on the recording medium, first conveying member arranged upstream of the platen along a conveying direction of the recording medium for conveying the recording medium, second conveying member arranged downstream of the platen along the conveying direction of the recording medium for conveying the recording medium; guide member for guiding the recording medium when the recording medium is fed from the first conveying member to the second conveying member, and driving motor for causing the guide member to set at an operative position where the member guides the recording medium and a retracted position where the guiding member is retracted from the operative position.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: February 12, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsutomo Yoshizawa, Hiroshi Sugiyama, Nobuyuki Watanabe
  • Patent number: 4935680
    Abstract: A headrest control system for a motor vehicle equipped with a driver's seat and rear seats having adjustable headrests mounted thereon is disclosed which includes a driving motor for moving the headrest of the rear seat between an operative position for use and an inoperative retracted position, a first switch provided for actuating the driving motor, a second switch for actuating the driving motor, a memory for storing data of an optimum operative position of the headrest, and a sensor for detecting whether the rear seat is occupied by a passenger or not.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: June 19, 1990
    Assignee: Ikeda Bussan Company, Limited
    Inventor: Hiroshi Sugiyama
  • Patent number: 4882597
    Abstract: A liquid jet recording apparatus is provided with a recording head for discharging liquid to thereby effect recording, a carriage movable with the recording head mounted thereon, a first motor for driving the carriage, a tank for storing therein the liquid to be supplied to the recording head, a pedestal, movable with the tank mounted thereon, and a second motor for driving the pedestal.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: November 21, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroshi Sugiyama
  • Patent number: 4881186
    Abstract: In apparatus for measuring injection speed of a die cast machine, there are provided a pulse generator responsive to a movement of an injection plunger for producing a pulse signal, a detector for detecting a width of the pulse signal to produce pulse width data, a memory device successively storing the pulse width data between commencement and termination of injection, and an arithmetic operation circuit for calculating an average speed in a predetermined high speed section of a stroke of the injection plunger based on pulse width data stored in the memory device.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: November 14, 1989
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Hiroyuki Tsuboi, Hiroshi Sugiyama
  • Patent number: 4836608
    Abstract: Herein disclosed is a reclining device which can keep the latched engagement between a lock lever and a lock plate member even when, due to for example, sudden sitting of a person onto the seat, an abnormally big force is suddenly applied to the lock lever in a direction to cancel the latched engagement with the lock plate member. An operation lever is biased in a direction to cause a leaning end thereof to press a lug of the lock plate in a direction to achieve the latched engagement. The lock plate member, the lock lever and the operation lever are so arranged that when the leading end of the operation lever is pressed against the lug of the lock plate, the top of the leading end is placed at an opposite side of a pivot pin of the lock lever with respect to an imaginary line which passes through both a pivot pin of the lock plate member and a pivot pin of the operation lever.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: June 6, 1989
    Assignee: Ikeda Bussan Co., Ltd.
    Inventor: Hiroshi Sugiyama
  • Patent number: 4797824
    Abstract: An apparatus for detecting the position of a seat in a vehicle and position of eye of a sitter on the seat to thereby select an optimal position of a headrest on the basis of the detected position data. A plurality of data representing the seat position and the sitter's eye position are stored in a memory means to be read out for allowing a control means to performs arithmetic operation on the data as read out. On the basis of the result of the arithmetic operation, the positions of the headrests for a plurality of sitters can be selectively determined on the basis of the positions of the seat.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: January 10, 1989
    Assignee: Ikeda Bussan Co. Ltd.
    Inventors: Hiroshi Sugiyama, Mikio Fujiwara, Chikamasa Ikeda