Patents Assigned to Nagaoka International Corporation
  • Patent number: 9573082
    Abstract: Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper layer including a filter medium with a smaller specific gravity and a larger particle size than a filter medium of the lower layer; a water collection pipe (13) removing filtered water and supplying reverse cleaning water to the filter layer during reverse cleaning; drainage trough (12); and upper layer cleaning apparatus (10), in which the upper layer cleaning apparatus includes upper layer cleaning pipe support member (17), upper layer cleaning water pipe (18), surface-cleaning special air mixing nozzles (19), air suction pipe (20), and horizontal air pipes (31 and 32) and the raw water special air mixing nozzles (7) are attached to raw water inflow tank (70) provided on a part of the drainage trough (12).
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: February 21, 2017
    Assignee: NAGAOKA INTERNATIONAL CORPORATION
    Inventors: Hitoshi Mimura, Tadao Oiwa, Hui Lang Cai
  • Patent number: 9017559
    Abstract: A water treatment apparatus including one or more mixed raw water stream jet nozzles, a filtering tank housing a filter layer disposed below the mixed raw water stream jet nozzle or nozzles, the filter layer having an upper layer and a lower layer, the upper layer containing a filter material with a smaller specific gravity and a larger particle diameter than a filter material of the lower layer, a water collecting and distributing pipe for removing water filtered through the filter layer and supplying reverse stream cleaning water to the filter layer during reverse cleaning, filter material vibrating means for vibrating a filter material of the upper layer including a vibrating element connected to a power source and vibration expanding element buried in the upper layer for transmitting vibration of the vibrating element, and an overflow outlet provided in the filtering tank above the filter layer.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: April 28, 2015
    Assignee: Nagaoka International Corporation
    Inventors: Hitoshi Mimura, Kiyokazu Mukai
  • Publication number: 20140190907
    Abstract: Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper layer including a filter medium with a smaller specific gravity and a larger particle size than a filter medium of the lower layer; a water collection pipe (13) removing filtered water and supplying reverse cleaning water to the filter layer during reverse cleaning; drainage trough (12); and upper layer cleaning apparatus (10), in which the upper layer cleaning apparatus includes upper layer cleaning pipe support member (17), upper layer cleaning water pipe (18), surface-cleaning special air mixing nozzles (19), air suction pipe (20), and horizontal air pipes (31 and 32) and the raw water special air mixing nozzles (7) are attached to raw water inflow tank (70) provided on a part of the drainage trough (12)
    Type: Application
    Filed: July 5, 2012
    Publication date: July 10, 2014
    Applicant: NAGAOKA INTERNATIONAL CORPORATION
    Inventors: Hitoshi Mimura, Tadao Oiwa, Hui Lang Cai
  • Publication number: 20130068855
    Abstract: A mixed stream nozzle which can prevent accumulation and solidifying of oxides on an inner wall of a raw-water-air mixed stream nozzle of a water treatment apparatus with a simple device is provided. In a mixed stream nozzle having, at one end thereof, a water supply tube connecting portion (2), an air inlet (3) formed on the downstream side of the water supply tube connecting portion, and a mixed stream outlet (4) provided at the other end of the mixed stream nozzle from which mixed stream of water and air is jetted out, nozzle inner wall cleaning means is provided which is made of a twisted-ring chain (11) which is fixed to an inner wall of the nozzle on the downstream side of the air inlet (3) and extends to the vicinity of the mixed stream outlet (4) for colliding with the mixed stream and moving continuously in the nozzle in a manner to swivel by force received from the mixed stream and thereby contacting the inner wall of the nozzle.
    Type: Application
    Filed: March 31, 2011
    Publication date: March 21, 2013
    Applicant: NAGAOKA INTERNATIONAL CORPORATION
    Inventors: Hitoshi Mimura, Kiyokazu Mukai
  • Publication number: 20120103917
    Abstract: A water treatment apparatus including one or a plurality of mixed raw water stream jet nozzles (7), a filtering tank (5) housing a filter layer (4) disposed below the mixed raw water stream jet nozzle or nozzles, the filter layer consisting of an upper layer (2) and a lower layer (3) and the upper layer containing a filter material which has a smaller specific gravity and a larger particle diameter than a filter material of the lower layer, a water collecting and distributing pipe (13) for taking out water filtered through the filter layer and supplying reverse stream cleaning water to the filter layer during reverse cleaning, filter material vibrating means for vibrating a filter material of the upper layer which includes a vibrating element (9) connected to a power source and vibration expanding element (10) which is buried in the upper layer for transmitting vibration of the vibrating element, and an overflow outlet (12) provided in the filtering tank above the filter layer.
    Type: Application
    Filed: June 15, 2010
    Publication date: May 3, 2012
    Applicant: Nagaoka International Corporation
    Inventors: Hitoshi Mimura, Kiyokazu Mukai
  • Patent number: 8110116
    Abstract: A water treatment apparatus includes a raw water supply tube, mixed raw water stream jet nozzles each communicating at one end thereof with the raw water supply tube and having at the other end thereof a raw water outlet from which mixed stream of raw water and air is jetted out, a filtering tank housing a filter layer disposed below the mixed raw water stream jet nozzles with a predetermined distance between the surface of the filter layer and the raw water outlet of the mixed raw water stream jet nozzles, a filtered water takeout tube provided in the filtering tank for taking out water filtered through the filter layer, a reverse stream cleaning water supply tube provided in the filtering tank for supplying reverse stream cleaning water to the filter layer, filter layer cleaning jet nozzles each communicating at one end thereof with a filter layer cleaning water supply tube and having at the other end thereof a cleaning water outlet from which cleaning water is jetted out, and an overflow outlet provided in
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: February 7, 2012
    Assignee: Nagaoka International Corporation
    Inventors: Hitoshi Mimura, Kiyokazu Mukai
  • Publication number: 20100176071
    Abstract: A water treatment apparatus includes a raw water supply tube, mixed raw water stream jet nozzles each communicating at one end thereof with the raw water supply tube and having at the other end thereof a raw water outlet from which mixed stream of raw water and air is jetted out, a filtering tank housing a filter layer disposed below the mixed raw water stream jet nozzles with a predetermined distance between the surface of the filter layer and the raw water outlet of the mixed raw water stream jet nozzles, a filtered water takeout tube provided in the filtering tank for taking out water filtered through the filter layer, a reverse stream cleaning water supply tube provided in the filtering tank for supplying reverse stream cleaning water to the filter layer, filter layer cleaning jet nozzles each communicating at one end thereof with a filter layer cleaning water supply tube and having at the other end thereof a cleaning water outlet from which cleaning water is jetted out, and an overflow outlet provided in
    Type: Application
    Filed: May 19, 2009
    Publication date: July 15, 2010
    Applicant: NAGAOKA INTERNATIONAL CORPORATION
    Inventors: Hitoshi Mimura, Kiyokazu Mukai
  • Patent number: 6221320
    Abstract: A device for holding catalyst in a radial flow reactor includes a plurality of catalyst containers each of which is a segment of a cylinder divided in the axial plane thereof. Each catalyst container has a cross section of a size which enables the container to be carried in and out of the radial fow reactor through an opening formed in an upper or lower portion of the radial flow reactor, and includes a screen provided on a liquid inlet side and a screen provided on a liquid outlet side. The catalyst containers are assembled together to form a cylindrical catalyst bed in the radial flow reactor. The catalyst containers attains a uniform thickness of a catalyst bed in a radial direction between its inlet side and outlet side over the entire height of the cylindrical catalyst bed. One or more catalyst containers requiring checking or repair only can be taken out of the reactor.
    Type: Grant
    Filed: November 3, 1993
    Date of Patent: April 24, 2001
    Assignee: Nagaoka International Corporation
    Inventor: Tadayoshi Nagaoka
  • Patent number: 5787980
    Abstract: A well screen is composed of a plurality of screen units connected in series. Each of said screen units has a cylindrical connecting section at least at one end thereof and includes a plurality of support rods extending in the axial direction of the screen disposed cylindrically about a section of the screen other than the connecting section at a predetermined interval in the circumferential direction of the screen, and a wire wound on the outer periphery of said support rods so as to form slits of a predetermined width. The well screen further includes outer diameter equalizing means provided about adjacent ones of the connecting sections of two of the screen units connected to each other for substantially equalizing the outer diameter of said connecting sections to the outer diameter of sections other than the connecting sections.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: August 4, 1998
    Assignee: Nagaoka International Corporation
    Inventors: Derry D. Sparlin, Tadayoshi Nagaoka
  • Patent number: 5673726
    Abstract: A method for manufacturing a woven packing used in a device having an internal structure divided in a plurality of chambers or channels connected to one another for realizing material transfer, heat exchange or fixing between gases, liquids or gas and liquid is disclosed. The packing forming the internal structure has undulating permeable sheets disposed in parallel to one another to form plural channels which extend substantially in the direction of a main stream of fluid, said sheets having projecting portions which are disposed in a direction crossing the direction of the main stream and joints being formed between adjacent permeable sheets in the projecting portions. The joints between the adjacent permeable sheets are formed by simultaneously weaving a plurality of channels to manufacture a woven packing.
    Type: Grant
    Filed: June 8, 1995
    Date of Patent: October 7, 1997
    Assignee: Nagaoka International Corporation
    Inventor: Tadayoshi Nagaoka
  • Patent number: 5643458
    Abstract: A sludge dehydrating press device includes an outer screen case in which sludge to be treated is filled, the outer screen case having a screen surface in at least a part thereof, a press for pressing sludge filled in the outer screen case, one or more inner screen cases disposed slidably in the outer screen case including a screen surface extending in a direction crossing the direction of pressing by the press and having continuous slits and the inner screen cases having also a space into which water extracted from the sludge flows, and a positioning device for positioning the inner screen cases to a predetermined position after completion of pressing by the press. The screen surface of the outer screen case preferably is made of a wedge wire screen having a flat inside surface. The press device may further include an extracted water removing screen tube coaxially with the outer screen case.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: July 1, 1997
    Assignee: Nagaoka International Corporation
    Inventor: Tadayoshi Nagaoka
  • Patent number: 5476143
    Abstract: A well screen having slurry flow paths enclosed therein includes support rods extending in the axial direction of the screen disposed cylindrically at a predetermined interval in the circumferential direction of the screen, a wire wound on the outer periphery of said support rods so as to form slits of a predetermined width, one or more flow paths for gravel-containing slurry provided inside of the wire and extending in the axial direction of the screen, and openings for communicating the flow paths with the outside of the screen. Lowering and lifting of the screen through a wellbore can be made smoothly without interfering of the slurry flow paths with the wellbore and installation of the screen can thereby be facilitated.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: December 19, 1995
    Assignee: Nagaoka International Corporation
    Inventors: Derry D. Sparlin, Tadayoshi Nagaoka, Jeff Ashton
  • Patent number: 5476588
    Abstract: A multi-layer composite screen having filters of a plurality of layers superposed one upon another is provided. Each filter of the plurality of layers has wires of a substantially triangular or trapezoidal cross section arranged in parallel to one another with a continuous slit of a substantially V-shaped cross section being formed between respective adjacent wires, said slit widening increasingly inwardly from the surface of the screen. The wires of one filter of the respective adjacent filters cross the wires of the other filter and the respective adjacent filters are fixed to each other at crossing points of the wires of the respective filters. In one aspect of the invention, the wires are formed with linear projections extending in the longitudinal direction of the wires which facilitate electrical welding of the filters of the adjacent layers.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: December 19, 1995
    Assignee: Nagaoka International Corporation
    Inventor: Tadayoshi Nagaoka
  • Patent number: 5377423
    Abstract: A sludge dehydrating press includes a container in which sludge to be treated is filled, a press unit for pressing sludge filled in the container, one or more screen cases disposed at positions in the container where water can be extracted from the sludge in substantially all portions of the sludge pressed by the press unit. Each of the screen cases has a screen surface extending parallel to the direction of pressing by the press unit and has also a space into which water extracted from the sludge flows. By driving the press unit, sludge in the container is compressed and extracted water is caused to flow into the space in the screen cases and is drained to the outside of the dehydrating press.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: January 3, 1995
    Assignee: Nagaoka International Corporation
    Inventor: Tadayoshi Nagaoka
  • Patent number: 5311942
    Abstract: A well screen for a horizontal or high-angle well includes a screen main body and a protective frame. The screen main body has screen rods arranged in the circumferential direction of the well screen and a screen wire wound on the screen rods. The protective frame includes protective rods provided on the outside of the screen wire in the circumferential direction and extending in the axial direction of the well screen, annular rod holding members provided with interval in the axial direction for holding the protective rods, and a protective wire wound about the protective rods. When the well screen forced into the well passes through a bent section of the well, the protective frame slides in contact with the wall surface of the bent section thereby protecting the screen wire.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: May 17, 1994
    Assignee: Nagaoka International Corporation
    Inventor: Tadayoshi Nagaoka