Patents by Inventor Tetsuya Kurita

Tetsuya Kurita 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: 10717178
    Abstract: A fastener driving machine includes an actuator which injects a fastener to a driving target object, a controller which controls an operation of the actuator, and a sensor which detects a physical quantity changed by a contact with the driving target object. The controller controls the actuator based on the physical quantity detected by the sensor.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 21, 2020
    Assignee: MAX CO., LTD.
    Inventors: Yuu Yamamoto, Tetsuya Ohno, Yasunori Takahashi, Shuhei Kurita
  • Publication number: 20200186076
    Abstract: The object of the invention is to provide an inverter device and an electric motor device using the same to shorten a dead time. Thus, an inverter device is provided, which includes: a switching element including a control terminal and a pair of main terminals; a control circuit configured to output a control signal which indicates whether to instruct an ON state of the switching element; a decision circuit configured to output a decision signal which indicates a state of the switching element based on a voltage between the main terminals of the switching element; and a drive circuit configured to control the ON state or an OFF state of the switching element based on the control signal and the decision signal.
    Type: Application
    Filed: May 28, 2018
    Publication date: June 11, 2020
    Inventors: Tetsuya ISHIMARU, Junichi SAKANO, Shinichi KURITA
  • Patent number: 10537094
    Abstract: Provided is a multi-tube nozzle for use in eradicating harmful aquatic organisms, which physically kills harmful aquatic organisms while feeding water and thus allows intake water to be fed directly into a culture tank or a ballast tank without the need for a pretreatment tank, chemicals, neutralizers, etc. A multi-tube nozzle (A) for use in eradicating harmful aquatic organisms includes at least three nozzle tubes (1) that are provided adjacent to each other. The nozzle tubes (1) each includes: an inlet-side opening section (2) having an inner diameter that decreases from an inlet opening toward a throat section (3) located in the middle of the tube; an outlet-side opening section (4) having an inner diameter that increases from the throat section (3) toward an outlet opening; and the throat section (3) having a smallest inner diameter. The adjacent nozzle tubes (1) are spaced apart by a distance such that the adjacent inlet-side opening sections (2) overlap each other.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: January 21, 2020
    Assignees: KOWA KOGYO CO., LTD., AQUA IMPULSE CORPORATION, TOHOKU UNIVERSITY
    Inventors: Akihiro Kijima, Yasuaki Kohama, Minoru Ikeda, Yoshihisa Kurita, Ikuo Chiba, Tetsuya Kanno
  • Publication number: 20190216060
    Abstract: Provided is a multi-tube nozzle for use in eradicating harmful aquatic organisms, which physically kills harmful aquatic organisms while feeding water and thus allows intake water to be fed directly into a culture tank or a ballast tank without the need for a pretreatment tank, chemicals, neutralizers, etc. A multi-tube nozzle (A) for use in eradicating harmful aquatic organisms includes at least three nozzle tubes (1) that are provided adjacent to each other. The nozzle tubes (1) each includes: an inlet-side opening section (2) having an inner diameter that decreases from an inlet opening toward a throat section (3) located in the middle of the tube; an outlet-side opening section (4) having an inner diameter that increases from the throat section (3) toward an outlet opening; and the throat section (3) having a smallest inner diameter. The adjacent nozzle tubes (1) are spaced apart by a distance such that the adjacent inlet-side opening sections (2) overlap each other.
    Type: Application
    Filed: August 24, 2017
    Publication date: July 18, 2019
    Inventors: Akihiro KIJIMA, Yasuaki KOHAMA, Minoru IKEDA, Yoshihisa KURITA, Ikuo CHIBA, Tetsuya KANNO
  • Patent number: 10304761
    Abstract: Provided are a semiconductor device realized easily at low cost without requiring a complicated manufacturing process, and an alternator using the same. The semiconductor device includes a base having a base seat, a lead having a lead header, and an electronic circuit body, wherein the electronic circuit body is arranged between the base and the lead; the base seat is connected to a first surface of the electronic circuit body; the lead header is connected to a second surface of the electronic circuit body; the electronic circuit body is integrally covered by resin, including a transistor circuit chip having a switching element, a control circuit chip for controlling the switching element, a drain frame, and a source frame; either one of the drain frame and the source frame, and the base are connected; and the other one of the drain frame and the source frame, and the lead are connected.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: May 28, 2019
    Assignee: Hitachi Power Semiconductor Device, Ltd.
    Inventors: Kenya Kawano, Tetsuya Ishimaru, Shinichi Kurita, Takeshi Terakawa
  • Patent number: 4883592
    Abstract: The present invention relates to a filter press. The filter press includes a plurality of filter plates each of which comprises a filter frame having a space therein. The filter plate has a simple construction, providing the effect of reducing the weight of a filter press as a whole and protecting a filter press from damage by the filtering compression.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: November 28, 1989
    Assignee: Kurita Machinery Manufacturing Co., Ltd.
    Inventors: Tetsuya Kurita, Atsushi Takashima, Katsutami Shibasaki
  • Patent number: 4842733
    Abstract: The invention relates to an improvement of the construction of filter plates which are mounted on a filter press. The filter plates comprises a frame (1), a flat filtrate drainage guide member (3, 41, 52) disposed in the frame (1), and a supporting member (5, 5d, 40, 48, 53) for movably supporting the filtrate drainage guide member in the frame (1). The filtrate drainage guide member (3, 41, 52) can be prevented from being broken if filtration pressure applied to one face of the filtrate drainage guide member (3, 41, 52) of the filter plate (2) is much different from that applied to the other face of the filtrate drainage guide member (3, 41, 52) because the filtrate drainage guide member (3, 41, 52) is movably provided in the frame (1).
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: June 27, 1989
    Assignee: Kurita Machinery Manufacturing Company Ltd.
    Inventor: Tetsuya Kurita
  • Patent number: 4664797
    Abstract: A filter cloth hanging apparatus for a filter press, including a set of first and second support arms attached pivotally to each side face of each of filter plates, a spring attached to each of the first and second support arms, a set of first and second horizontal rods extending between opposite side faces of each of the filter plates through the springs, and a filter cloth attached, at its opposite ends, to the first and second horizontal rods and brought into contact, at its central portion, with a bottom face of each of the filter plates such that the first and second support arms are pivotally coupled with each other between each pair of adjacent ones of the filter plates.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: May 12, 1987
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventor: Tetsuya Kurita
  • Patent number: 4581138
    Abstract: A filter press including a plurality of filter plates, a pair of filter cloths disposed at opposite faces of each of the filter plates, a wind-up device for winding up the pair of the filter cloths, a guide member having a pair of curved guide surfaces formed at its opposite side edges, respectively and a pair of guide rollers. The pair of the filter cloths are guided downwardly by the guide member and the pair of the guide rollers so as to be wound up by the wind-up device such that the pair of the filter cloths are bent inwardly toward each other at the pair of the curved guide surfaces of the guide member, respectively.
    Type: Grant
    Filed: June 28, 1984
    Date of Patent: April 8, 1986
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventors: Tetsuya Kurita, Seiichi Suwa
  • Patent number: 4491519
    Abstract: A filter cloth arrangement for use in a fixed filter cloth type filter press including at least one pair of first and second filter plates and a pair of first and second filter cloths interposed between the first and second filter plates. The arrangement includes a support member for supporting upper ends of the first and second filter cloths, an elastic member for vibratingly supporting the support member, a fixing member for fixing lower ends of the first and second filter cloths to it, and a first slurry feeding plate attached to the first filter cloth.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: January 1, 1985
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventor: Tetsuya Kurita
  • Patent number: 4446020
    Abstract: A filter press separates a raw liquid into a filtrate and a filter residue. The filter press includes a plurality of filter residue separating members each composed of a pair of confronting members between which a slit passage for passing a filter cloth is formed, and each provided between a pair of spaced support frames fixed to a lower portion of each filter plate, while a wedge-like edge portion is formed at the upper edge of one of the confronting members of the filter residue separating member for smoothly separating the filter residue from the filter cloth without any damage to the surface of the filter cloth.
    Type: Grant
    Filed: December 21, 1982
    Date of Patent: May 1, 1984
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventor: Tetsuya Kurita
  • Patent number: 4317734
    Abstract: A filtration-compression type filter press comprising a fixed end plate and a movable end plate and compression filter plates suitably disposed therebetween. Each compression filter plate comprises a base plate two flexible fluid-tight sheets applied to the front and rear surfaces of the base plate respectively and having uneven filter surfaces with a filter cloth piece applied thereto to define pressure chamber between the base plate and each of the sheets and to provide a filtration chamber between adjacent filter plates for receiving a prefilt. The compression filter plate has a pressure fluid feed channel communicating with the pressure chamber a filtrate outlet channel open to its filter surface, and a prefilt supply channel open to the filtration chamber.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: March 2, 1982
    Inventor: Tetsuya Kurita
  • Patent number: 4237009
    Abstract: A filtration-compression type filter press comprising a fixed end plate and a movable end plate and compression filter plates suitably disposed therebetween. Each compression filter plate comprises a base plate having a central opening larger than a slurry feed port and a filter compression diaphragm in the form of two flexible fluid-tight sheets applied to the front and rear surfaces of the base plate and having uneven filter surfaces with a filter cloth piece applied thereto. The diaphragm is integrally formed with a cylindrical portion interconnecting the sheets and extending through the opening in the base plate to define the slurry feed port. A pressure chamber is formed between the base plate and each of the sheets. The compression filter plate has a pressure fluid feed channel communicating at least with the pressure chamber and a filtrate outlet channel open to its filter surface.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: December 2, 1980
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventor: Tetsuya Kurita
  • Patent number: 4171266
    Abstract: An apparatus comprising a pair of reciprocally movable carriers each provided with a drive dog and a stop dog tiltably pivoted to the carrier and biased toward a tilted position in the direction opposite to a direction of transport of filter plates, a stopper for preventing the drive dog positioned toward the opposite direction from tilting toward that direction and releasing the drive dog from its prevented position, another stopper for preventing the stop dog from tilting toward the transport direction, and a freely movable member pushable by the drive dog to raise the stop dog when the drive dog tilts toward the transport direction.
    Type: Grant
    Filed: December 9, 1977
    Date of Patent: October 16, 1979
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventors: Tetsuya Kurita, Muneyuki Miyano
  • Patent number: 4129137
    Abstract: A washing apparatus for a filter press comprises a spray pipe having a number of nozzles and disposed outside of the filter plates so as to extend parallel to one side of such filter plate, a movable unit in which one end of the spray pipe opposed to a lower corner of such filter plate is pivotally mounted and which is movable in a region outside of the filter plates parallelly to the latter, a carriage supporting the movable unit and movable in a region outside of the filter plates in the direction of movement of the latter, which carriage, each time a filter plate is transferred toward a movable end plate, serves to carry the movable unit in a direction opposite to the direction of such transfer so as to position the spray pipe between separated filter plates, a mechanism for moving the movable unit to and fro when the spray pipe is positioned between separated filter plates, and a second mechanism for raising and lowering the spray pipe synchronously with the to-and-fro movement of the movable unit, these
    Type: Grant
    Filed: November 4, 1977
    Date of Patent: December 12, 1978
    Assignee: Kurita Machinery Manufacturing Company Limited
    Inventors: Tetsuya Kurita, Toshifumi Hara
  • Patent number: 4108777
    Abstract: A filter press having a plurality of filter plates so supported between fixed and movable heads of the machine framework that the filter plates can selectively be separated from each other and compressed together to a substantially watertight closure between the fixed and movable heads. A filter medium is provided for each filter plate and is composed of a pair of filter webs covering respectively the opposed filtering surfaces of the filter plate. The filter webs are connected at their one end to a winding device and at their other end to a tensioning and winding roll assembly after having turned around a pair of juxtaposed guide rolls. Each tensioning and winding roll assembly is composed of a cylindrical roll and a biasing element for biasing the cylindrical roll in one direction with the filter webs forced to be wound therearound.
    Type: Grant
    Filed: September 8, 1977
    Date of Patent: August 22, 1978
    Assignee: Kurita Machinery Manufacturing Co., Ltd.
    Inventors: Tetsuya Kurita, Seiichi Suwa, Masayuki Nakamura, Takashi Torii
  • Patent number: 3988242
    Abstract: An expressing filter plate comprising a base plate and a diaphragm sheet covering the base plate and having a filter surface, with a pressure fluid chamber formed between the base plate and the diaphragm sheet. The diaphragm sheet is formed, in its peripheral portion to be clamped between pressed filter plates, with a fluid passing opening in communication with a fluid passage in the base plate. A covering member having a tubular portion fitting in the opening is made of a material having higher hardness than the diaphragm sheet. The covering member has a flange portion formed with fluid grooves for maintaining the tubular portion in communication with filtrate grooves in the filter surface of the diaphragm sheet.
    Type: Grant
    Filed: April 27, 1976
    Date of Patent: October 26, 1976
    Assignee: Kurita Machinery Manufacturing Company
    Inventors: Tetsuya Kurita, Atsushi Kataoka
  • Patent number: 3957645
    Abstract: A filter plate assembly in which a filter wall has a large number of small pyramidal projections on its opposite surfaces, a peripheral frame portion supporting the outer periphery of the filter wall and formed with a prefilt passage and a filtrate passage extending therethrough, and a filter medium supported by the peripheral frame portion and covering the opposite surfaces of the filter wall. The peripheral frame portion has a rigid frame and elastic frames sandwiching the rigid frame and joined thereto. Each of the elastic frames is provided, in its surface, with an open groove to form a prefilt inlet port through which the prefilt passage communicates with a prefilt chamber defined by the filter plate and another filter plate to be fitted therewith, whereby clogging of the prefilt inlet port is eliminated.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: May 18, 1976
    Assignee: Kurita Machinery Manufacturing Co. Ltd.
    Inventors: Kenichiro Kurita, Tetsuya Kurita, Hachiro Yamaji