Patents by Inventor Akira Yamashita

Akira Yamashita 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: 4754220
    Abstract: The present device comprises a stator having a plurality of poles on which primary coils and at least one secondary coil is wound, and a rotor opposing the respective poles of the stator with gaps therebetween. A clock pulse generator is provided, and the respective primary coils are separately excited by reference AC signals which are out of phase with each other and are generated in response to a count of a counter counting a clock pulse signal from the clock pulse generator. The output of the secondary coil or coils provides an output signal resulting by phase shifting the reference AC signals in accordance with the rotational position of the rotor. The phase difference between the reference AC signal and the output signal is detected by obtaining a digital count representing the phase difference in synchronization with the counting by the counter to obtain detected digital phase difference data as an absolute rotational position data.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: June 28, 1988
    Assignee: Kabushiki Kaisha SG
    Inventors: Wataru Shimizu, Akira Yamashita
  • Patent number: 4741969
    Abstract: An aqueous ink recording sheet is described which is prepared by coating on the surface of a substrate sheet a resin composition containing as the chief ingredient a mixture comprising (A) 10 to 90 wt % of photo polymerizable, double bonded anionic synthetic resin, and (B) 90 to 0 wt % of partially or completely saponified polyvinyl alcohol, or partially or completely saponified polymer resin composed of 20 to 100 wt % of vinyl acetate and 80 to 0 wt % of other polymerizable monomer or derivatives thereof, and/or (C) 90 to 0 wt % of homopolymer resin of N-vinylpyrrolidone or copolymer resin of other polymerizable monomer therewith, with the weight ratio of (A)/[(B)+(C)] being 90/10 to 10/90, drying the coated resin composition, and then curing the resin composition by the irradiation with actinic rays so as to form a resin coating layer on the substrate.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: May 3, 1988
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kazuhide Hayama, Akira Yamashita
  • Patent number: 4742062
    Abstract: Novel benzylpiperazine compound of the formula: ##STR1## or a pharmaceutically acceptable acid addition salt thereof, which has excellent hypolipidemic activity without undesirable side effect, and a pharmaceutical composition containing the compound as an active ingredient suitable for the prophylaxis and treatment of hyperlipidemia.
    Type: Grant
    Filed: July 8, 1986
    Date of Patent: May 3, 1988
    Assignee: Kanebo, Ltd.
    Inventors: Hiroshi Ohtaka, Yoichiro Hamada, Akira Yamashita, Keizo Ito, Goro Tsukamoto
  • Patent number: 4667235
    Abstract: A teletext decoder having a character pickup circuit superior in the antinoise property and response characteristic by allowing signals only in the vicinity of clock run-in signals to pass, simultaneously detecting the amplitude of clock run-in signals through a band-pass filter circuit, gating framing code signals and reproduced clock and slice data, and integrating and holding the clock run-in signals.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: May 19, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshiro Nozoe, Akira Yamashita, Masayoshi Hirashima, Shin Fukuda
  • Patent number: 4654051
    Abstract: Grinding wheel having a bonding agent for binding abrasive grains, comprising a reaction product of a synthetic resin and cashew nut sheel liquid or its derivatives. The bonding agent may include a surface active agent.
    Type: Grant
    Filed: October 1, 1985
    Date of Patent: March 31, 1987
    Assignee: Tohoku Chemical Industries, Ltd.
    Inventors: Keiichi Orita, Akira Yamashita
  • Patent number: 4638358
    Abstract: A sampling clock reproducing circuit which reproduces the sampling clock for sampling character data signals from the teletext signal superposed on the vertical blanking period of television signal, which has a gate for passing signals in the vicinity of clock run-in signals, a band-pass filter, a self-excited oscillator, phase comparison circuits for comparing the band-pass filter with the self-excited oscillator in the phase of output thereof, and an oscillation output circuit comprising a phase-shift circuit controlled by the outputs of the phase comparison circuits.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: January 20, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshiro Nozoe, Akira Yamashita
  • Patent number: 4612503
    Abstract: A detection head unit comprises a stator and a rotor. The stator has four poles disposed circumferentially at an interval of 90.degree.. The poles have primary coils and secondary coils wound thereon. Two radially opposing poles constitute a pole pair. The primary coils wound on the poles constituting the pole pair are connected in series and in opposite phase with each other and one pole pair is excited by a sine wave signal and the other pole pair by a cosine wave signal. The rotor is of such a configuration, e.g. an eccentric rotor, as to change reluctance of the respective stator poles in accordance with a rotation angle and change reluctance in a differential manner between the two poles constituting the pole pair. An output signal resulting by phase shifting the sine wave signal applied to the primary coil in accordance with a rotation angle of the rotor is provided by a secondary coil.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: September 16, 1986
    Assignee: Kabushiki Kaisha S G
    Inventors: Wataru Shimizu, Akira Yamashita
  • Patent number: 4604575
    Abstract: This device comprises a first detector having a first rotor and a first stator for detecting an absolute rotational position within one cycle which corresponds to 1/N circumference, said rotor having teeth of N, and a second detector having a second rotor coupled with the first rotor and a second stator for detecting an absolute rotational position within one circumference within one cycle which corresponds to one circumference. The first and second stators are respectively provided with primary coils and secondary coils. The respective primary coils are excited by reference AC signals generated in response to a clock pulse signal from a clock pulse generator. Phase differences between first and second output signals produced from the secondary coils of the respective detectors and the reference AC signals are obtained by counting the clock pulse signal.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: August 5, 1986
    Assignee: Kabushiki Kaisha SG
    Inventors: Wataru Shimizu, Akira Yamashita
  • Patent number: 4564560
    Abstract: A sheet for water base ink recording comprises a backing substrate including a surface layer obtained by ultraviolet or radiation curing of a composition composed mainly of an ultraviolet or radiation curing type resin starting from a natural high-molecular substance and, optionally, containing an ultraviolet or radiation curing type antistatic agent.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: January 14, 1986
    Assignees: Sanyo-Kokusaku Pulp Co., Ltd., Mitsubishi Yuka Fine Chemicals Co., Ltd.
    Inventors: Hideki Tani, Makoto Arai, Takayuki Sasaki, Kazuhide Hayama, Akira Yamashita
  • Patent number: 4556886
    Abstract: About a bobbin, there are wound primary coils in axially displaced locations and wound also is a secondary coil. A core is linearly slidably provided in the bobbin. The primary coils are individually excited by AC signals which are out of phase with each other, e.g. a sine wave signal and a cosine wave signal. The secondary coil thereupon produces an output signal resulting from phase shifting the applied sine or cosine wave signal in accordance with a linear position of the core. Accordingly, the linear position can be detected by measuring phase difference between a reference AC signal and the output signal of the secondary coil. Likewise, velocity and acceleration change may be determined using the position change data.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: December 3, 1985
    Assignee: Kabushiki Kaisha S G
    Inventors: Wataru Shimizu, Akira Yamashita
  • Patent number: 4374398
    Abstract: In a receiver of the type capable of receiving a second or third subchannel audio signal which contains no pilot signal and which is multiplexed with the television audio signal, only the subchannel signal frequency components pass through a band-pass filter the output of which is fed to a clipper circuit so that the carrier level of the output is suppressed. The output of the clipper circuit is detected whether the subchannel signal is present or absent or subchannel signal is increased so that a squelch circuit is turned off and a display device is turned on or vice versa.
    Type: Grant
    Filed: April 8, 1981
    Date of Patent: February 15, 1983
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akira Yamashita, Nagai Hiroyuki
  • Patent number: 4300928
    Abstract: A structure for supporting an air filter on a carburetor, the air filter having a casing accommodating an air filtration element and a cap adapted to close the upper opening of the casing, the cap being adapted to be centered and fixed to the carburetor by a cooperation of a center bolt projecting upward from the carburetor and a butterfly nut. The supporting structure has a supporting member adapted to be fixed to the carburetor, an annular disc-shaped first resilient member connected at its inner periphery to one end of the supporting member and at its outer periphery to the casing of the air filter, and a second resilient member through which the cap of the air filter is fixed to an opposite end of the supporting member. The vibration of the casing and the cap of the air filter is avoided thanks to the first and the second resilient members which insulate the casing and the cap from the vibration caused by the engine to which the air filter is attached.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: November 17, 1981
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiromichi Sugie, Hajime Akado, Akira Yamashita, Yasuhiko Nakamura
  • Patent number: 4273564
    Abstract: An air cleaner of an internal combustion engine including an air inlet conduit connected to a main body containing a filter element and composed of upper and lower longitudinally extending conduit portions formed of a synthetic resin and connected together. The lower conduit portion is formed integrally with a heated air inlet port, and the upper conduit portion is formed integrally with a stepped flange for constituting a lower half portion of a housing of a vacuum motor. A cap is joined by supersonic melt adhesion or bonding to the stepped flange with an outer peripheral edge of a diaphragm being held therebetween, to provide an upper half portion of the housing of the vacuum motor. The diaphragm is connected at its upper portion to a valve body for opening and closing the heated air inlet port which is controlled by the vacuum motor of the diaphragm type.
    Type: Grant
    Filed: April 15, 1980
    Date of Patent: June 16, 1981
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiromichi Sugie, Hajime Akado, Akira Yamashita
  • Patent number: 4130405
    Abstract: An air filter container arrangement with improved male and female connectors to detachably connect the cover and casing and also the casing and air inlet pipe.
    Type: Grant
    Filed: January 5, 1977
    Date of Patent: December 19, 1978
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hajime Akado, Hiroshi Ueda, Akira Yamashita, Takemasa Tamura
  • Patent number: 3964822
    Abstract: A projection screen includes a substrate having a metallic aluminum surface and a transparent film overlay. The metallic aluminum surface is provided with a pattern of directional irregularities and a pattern of craters. The projection screen is produced by subjecting an aluminum surface to a mechanical surface treatment to form a dense pattern of fine irregularities, etching the treated surface to form a crater pattern thereon and coating the resulting surface with a protective transparent film.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: June 22, 1976
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventor: Akira Yamashita