Patents by Inventor Tetsuo Sekiya

Tetsuo Sekiya 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: 8575878
    Abstract: An energy converter includes a magnetism generation mechanism unit that generates a magnetic field when connected to an AC electrical power source, and a rotating mechanism unit having a single turn coil array member in which a plurality of single turn coils is disposed at a predetermined interval and a soft magnetic metal plate disposed on a side of the single turn coil array member opposite to the magnetism generation mechanism unit. The rotating mechanism unit is structured such that the single turn coil array member faces the magnetism generation mechanism unit across a predetermined magnetic gap and rotary driven by the magnetic field. Here, a drive signal period of the electrical power source is a period that maximizes an eddy current generated in the soft magnetic metal plate.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: November 5, 2013
    Assignee: TBK Co., Ltd
    Inventors: Tetsuo Sekiya, Kiyotsugu Narita
  • Publication number: 20110248664
    Abstract: An energy converter includes a magnetism generation mechanism unit that generates a magnetic field when connected to an AC electrical power source, and a rotating mechanism unit having a single turn coil array member in which a plurality of single turn coils is disposed at a predetermined interval and a soft magnetic metal plate disposed on a side of the single turn coil array member opposite to the magnetism generation mechanism unit. The rotating mechanism unit is structured such that the single turn coil array member faces the magnetism generation mechanism unit across a predetermined magnetic gap and rotary driven by the magnetic field. Here, a drive signal period of the electrical power source is a period that maximizes an eddy current generated in the soft magnetic metal plate.
    Type: Application
    Filed: November 26, 2009
    Publication date: October 13, 2011
    Applicant: TBK Co Ltd
    Inventors: Tetsuo Sekiya, Kiyotsugu Narita
  • Patent number: 5872691
    Abstract: A thin-film magnetic head, a magnetoresistance effect magnetic head and an MR inductive head are disclosed. The thin-film magnetic head has one of thin-film magnetic cores stacked on a substrate and formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the thin-film magnetic core in the direction of hard axis thereof. The magnetoresistance effect magnetic head has one of a pair of shield cores having a magnetoresistive element between them formed of two magnetic films and a non-magnetic film held between them, the magnetoresistive element being electrically connected to the shield core, with a sense current flowing through the shield core. The current flowing through the one shield core via the magnetoresistive element is preferably an AC of decrement amplitude for demagnetizing the shield core along with a DC sense current.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: February 16, 1999
    Assignee: Sony Corporation
    Inventors: Munekatsu Fukuyama, Yasuo Sasaki, Yutaka Soda, Koji Fukumoto, Tetsuo Sekiya
  • Patent number: 5822159
    Abstract: A thin-film magnetic head, a magnetoresistance effect magnetic head and an MR inductive head are disclosed. The thin-film magnetic head has one of thin-film magnetic cores stacked on a substrate and formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the thin-film magnetic core in the direction of hard axis thereof. The magnetoresistance effect magnetic head has one of a pair of shield cores having a magnetoresistive element between them formed of two magnetic films and a non-magnetic film held between them, the magnetoresistive element being electrically connected to the shield core, with a sense current flowing through the shield core. The current flowing through the one shield core via the magnetoresistive element is preferably an AC of decrement amplitude for demagnetizing the shield core along with a DC sense current.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: October 13, 1998
    Assignee: Sony Corporation
    Inventors: Munekatsu Fukuyama, Yasuo Sasaki, Yutaka Soda, Koji Fukumoto, Tetsuo Sekiya
  • Patent number: 5439927
    Abstract: The .beta.-oxo-.beta.-benzenepropanethioamide derivative of the present invention has potassium channel opening action and is useful for treatment of hypertension, asthma, hypersensitive colon syndrome, and enteritis through pharmacological actions including blood vessel dilation, bronchial tract dilation, relaxation of gastrointestinal tract smooth muscle, and the like. The present invention also includes a pharmaceutical composition containing, as the active ingredient, the compound of the present invention and a method for producing the same.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: August 8, 1995
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tetsuo Sekiya, Mikio Tsutsui, Tetsuro Shimpuku, Tatsuo Nagano, Junko Hayashi, Asami Seino
  • Patent number: 5436772
    Abstract: A magneto-resistance/inductive integrated composite magnetic head which has a stabilized reproduction output and is high in reliability. The magnetic head comprises a composite magnetic head including a magneto-resistance effect type head and an inductive type head integrated with each other and a recording coil, and an electric circuit for supplying, after recording, the recording coil of the composite magnetic head with an electric current which attenuates in a fashion of an alternating current from a value of a recording current or a value around or higher than such value of a recording current to another value in the proximity of the zero level.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: July 25, 1995
    Assignee: Sony Corporation
    Inventors: Tetsuo Sekiya, Fumi Sugawara, Hideo Suyama
  • Patent number: 5424890
    Abstract: A magnetoresistance effect type thin film head (A) constructed in a manner that a magnetoresistance effect element, that is, an MR element (1) is disposed perpendicularly to a head surface a, and among two electrodes (2a) and (2b) led out from both ends of the MR element (1), the one electrode (2a) is exposed to the head surface a but the other electrode (2b) is not exposed to the head surface a, wherein the one electrode (2a) exposed to the head surface a is connected to a ground voltage Vss, thereby decreasing the change in voltage difference between the electrode (2a) of the MR element (1) and a disc surface b to prevent the electrical breakdown of the thin film head (A).
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: June 13, 1995
    Assignee: Sony Corporation
    Inventors: Hideo Suyama, Tetsuo Sekiya, Munekatsu Fukuyama, Norio Saito, Takuji Shibata
  • Patent number: 5332833
    Abstract: The .beta.-oxo-.beta.-benzenepropanethioamide derivative of the present invention has potassium channel opening action and is useful for treatment of hypertension, asthma, hypersensitive colon syndrome, and enteritis through pharmacological actions including blood vessel dilation, bronchial tract dilation, relaxation of gastrointestinal tract smooth muscle, and the like. The present invention also includes a pharmaceutical composition containing, as the active ingredient, the compound of the present invention and a method for producing the same.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 26, 1994
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tetsuo Sekiya, Mikio Tsutsui, Tetsuro Shimpuku, Tatsuo Nagano, Junko Hayashi, Asami Seino
  • Patent number: 5313342
    Abstract: An analog/digital compatible reproducing system is disclosed, particularly a stationary head system using a digital recorded magnetic tape having a plurality of n, digital data recorded tracks. An analog recorded magnetic tape has a first analog recorded track and a second analog recorded track between which a guardband of a certain width is provided. Signals are reproduced from the digital recorded magnetic tape by driving n reproducing magnetic head elements respectively corresponding to the n digital data recorded tracks. The analog recorded magnetic tape is reproduced by driving a plurality of m reproducing magnetic head elements of said n reproducing, magnetic head elements, corresponding to the first and second recorded tracks so that common outputs can be produced from the m reproducing magnetic head elements. There is also disclosed a tape cassette used in such system.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: May 17, 1994
    Assignee: Sony Corporation
    Inventors: Yutaka Soda, Keisuke Fujiwara, Hiroaki Yada, Satoru Seko, Munekatsu Fukuyama, Tetsuo Sekiya
  • Patent number: 5260836
    Abstract: Apparatus is provided for reproducing either M channels of digital audio signals recorded in longitudinal tracks on a record medium or an analog audio signal recorded in one or two stereo tracks. M heads are used to reproduce the M channels of digital audio signals and N of those heads (N.ltoreq.M) are used to reproduce the analog audio signal. The reproduced digital or analog audio signals are multiplexed and digitized. When digital audio signals are reproduced, the digitized multiplexed signals are digitally processed and then converted to analog form. When analog audio signals are reproduced, the digitized multiplexed signals are summed such that signals reproduced by the N heads are combined to form a digital representation of the recorded analog audio signal. The summed signals then are converted to analog form to recover the original analog audio signal.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: November 9, 1993
    Assignee: Sony Corporation
    Inventors: Horoaki Yada, Yutaka Soda, Keisuke Fujiwara, Satoru Seko, Munekatsu Fukuyama, Tetsuo Sekiya
  • Patent number: 5202351
    Abstract: A novel 1-phenylalkyl-3-phenylurea derivative represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.5 represent independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.5 alkoxyl or halo; R.sup.2 represents hydrogen or C.sub.1 -C.sub.15 alkyl; R.sup.3 represents C.sub.1 -C.sub.15 alkyl or R.sup.3 represents together with R.sup.2 C.sub.2 -C.sub.9 alkylene; R.sup.4 and R.sup.5 represent independently C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxyl or halo; X represents oxygen or sulfur; Y represents --O--(CH.sub.2).sub.l --O-- wherein l is an integer of 1 to 3 or --(CH.sub.2).sub.p -- wherein p is an integer of 3 to 5; m is 0 or an integer of 1 to 5; and n is 0 or an integer of 1 to 3, is provided. The 1-phenylalkyl-3-phenylurea derivative (I) have the action of reducing cholesterol in blood by ACAT inhibition, and therefore, useful for treating hyperlipemia and atherosclerosis.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: April 13, 1993
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tetsuo Sekiya, Shinya Inoue, Chiaki Hyodo, Hiromi Okushima, Kohei Umezu, Kazuo Suzuki
  • Patent number: 5197806
    Abstract: Described herein is a rotational bearing system incorporating a ball bearing to support a shaft or housing in freely rotatable state through rolling contact with the ball bearing, the rotational bearing system comprising: vibratory elements adapted to excite in resonant vibration a fixed shaft or a fixed housing in rolling contact with the ball bearings thereby to lower the frictional resistance of the ball bearing.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: March 30, 1993
    Assignee: Sony Corporation
    Inventors: Kanji Murano, Tetsuo Sekiya, Akihiko Ohashi, Takehisa Ishida
  • Patent number: 5145259
    Abstract: A rotational bearing system incorporates a ball bearing to support a freely rotatable shaft or housing through rolling contact with the ball bearing, the rotational bearing system comprises: vibratory elements adapted to excite in resonant vibration a fixed shaft or a fixed housing in rolling contact with the ball bearings to lower the frictional resistance of the ball bearing.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: September 8, 1992
    Assignee: Sony Corporation
    Inventors: Kanji Murano, Tetsuo Sekiya, Akihiko Ohashi, Takehisa Ishida
  • Patent number: 5126483
    Abstract: Novel 1-phenylakyl-3-phenylurea derivatives represented by the following formula (I): ##STR1## wherein R.sup.1 is an alkyl group of 1 to 8 carbon atoms, an alkoxy group of 1 to 5 carbon atoms or a halogen atom, R.sup.2 is an alkyl group of 1 to 15 carbon atoms, each of R.sup.3 and R.sup.4 is independently an alkyl group of 1 to 5 carbon atoms, m is an integer of 1 to 3, and n is 0 or 1, are provided.The compounds are potent in reducing the cholesterol level in serum, and useful for treating hyperlipemia and atherosclerosis.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: June 30, 1992
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tetsuo Sekiya, Shinya Inoue, Chiaki Hyodo, Hiromi Okushima, Kohei Umezu, Kazuo Suzuki
  • Patent number: 5065390
    Abstract: A magneto-optical playback head which comprises a first optical waveguide facing to a light source at one end thereof and facing to a magneto-optical recording medium at other end thereof for guiding an incident light beam to the magneto-optical recording medium, a second optical waveguide for guiding a light beam reflected from the magneto-optical recording medium to a photodetector provided at one end thereof, a polarizer provided for the first optical waveguide, and an analyzer provided for the second optical waveguide, the polarizer and the analyzer being formed by providing first and second conductive layers on the first and second optical waveguides, with first and second insulating buffer layers interposed therebetween, respectively.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: November 12, 1991
    Assignee: Sony Corporation
    Inventors: Teiichi Miyauchi, Yutaka Soda, Tetsuo Sekiya
  • Patent number: 5063247
    Abstract: Novel diphenylurea derivatives represented by the following formula (I): ##STR1## wherein R.sub.1 is an alkyl group of 5 to 18 carbon atoms, each of R.sub.2 and R.sub.3 is independently an alkyl group of 1 to 5 carbon atoms, an alkoxy group of 1 to 5 carbon atoms or a halogen atom, R.sub.4 is hydrogen atom, an alkyl group of 1 to 5 carbon atoms, an alkoxy group of 1 to 5 carbon atoms or a halogen atom, and X is oxygen atom or sulfur atom, are provided.The compounds are potent in reducing the cholesterol level in serum, and useful for treating hyperlipemia and atherosclerosis.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: November 5, 1991
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tetsuo Sekiya, Shinya Inoue, Masao Taniguchi, Kohei Umezu, Kazuo Suzuki
  • Patent number: 4757410
    Abstract: A multi-channel magnetoresistance effect type magnetic head has a short wavelength region magnetic head element and a relatively longer wavelength region magnetic head element. The two head elements are provided on a magnetic substrate with each having a magnetic circuit containing a magnetic gap facing a surface adjacent to and across from a magnetic recording medium. Each magnetic circuit has a discontinuity portion with a bridging magnetoresistance effect sensing element to magnetically connect the discontinuity portion. The longer wavelength magnetic head discontinuity portion is spaced at a greater distance from the adjacent surface than is the discontinuity portion of the shorter wavelength magnetic head element.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: July 12, 1988
    Assignee: Sony Corporation
    Inventors: Satoru Seko, Yutaka Soda, Hiroyuki Uchida, Tetsuo Sekiya
  • Patent number: 4729048
    Abstract: A combination magnetic transducer head apparatus which can easily achieve initial formatting of data tracks of a rotating magnetic recording medium such as a hard disk without using a specific separate initial formatting system. The apparatus comprises a magnetic head for initial formatting, another magnetic head for servo control and a magnetic recording and playback head all mounted on a head slider. In the apparatus, at least one track is first recorded on a magnetic disk by the magnetic head for initial formatting and then another track is recorded by the magnetic recording and playback head while the first track is scanned by the magnetic head for servo control whereafter such a series of operations are repeated until completion of recording of all tracks required.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: March 1, 1988
    Assignee: Sony Corporation
    Inventors: Shigeyoshi Imakoshi, Hideo Suyama, Hiroaki Yada, Toru Katakura, Tetsuo Sekiya, Masayuki Nakayama
  • Patent number: 4713710
    Abstract: The present invention is to construct a combination magnetic head apparatus in which thin film type magnetic head element portions, circuits and circuit parts accompanying therewith are mounted on first and second magnetic shield plates to thereby construct a recording head and a reproducing head and both the magnetic shield plates are bonded together at the back surfaces thereof with the result that the apparatus can be made small in size, the assembling thereof can be simplified and the accuracy thereof can be improved.
    Type: Grant
    Filed: February 25, 1986
    Date of Patent: December 15, 1987
    Assignee: Sony Corporation
    Inventors: Yutaka Soda, Hideko Imamura, Hiroyuki Uchida, Tetsuo Sekiya
  • Patent number: 4701815
    Abstract: A servo system for positioning a data transducer head relative to a plurality of substantially concentric data tracks on the surface of a magnetic disc including a pair of servo transducer heads for sensing the data tracks and generating output signals representative of a data signal written on the sensed track, a distance between the pair of servo transducer heads being related to the dimension of the data track and a distance between the servo transducer heads and the data transducer head being related to a data track pitch, a signal processing circuit connected to the pair of servo transducer heads for generating a data transducer head positioning signal and a positioning device for positioning the data transducer head in response to the transducer positioning signal and for maintaining the track centerline alignment of the data transducer head.
    Type: Grant
    Filed: March 6, 1986
    Date of Patent: October 20, 1987
    Assignee: Sony Corporation
    Inventors: Hiroaki Yada, Shigeyoshi Imakoshi, Hideo Suyama, Tetsuo Sekiya, Masayuki Nakayama