Patents by Inventor Hirosuke Suzuki

Hirosuke Suzuki 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: 5227742
    Abstract: An improved stripline cable is provided wherein porous, expanded polytetrafluoroethylene having continuous openings therethrough is disposed between sets of substantially parallel electrical conductors and having a covering on both sides thereof holding the conductors in place. The covering is preferably of a fluororesin. Each set of conductors can be a signal conductor having a smaller cross-sectional area, i.e. small width or diameter, and a ground conductor having a larger cross-sectional area. The cable as aforesaid can also have an electromagnetic shielding material laminated to the outer sides of the covering.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: July 13, 1993
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4970455
    Abstract: A device for measuring electromagnetic wave leakage from power supply lines and digital equipment by a system of focused concave reflective plates, an antenna to disburse and detect radiation, and an instrument to measure the leaked radiation.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: November 13, 1990
    Inventors: Hirosuke Suzuki, Hidenori Furuta, Kenneth R. Davis
  • Patent number: 4923410
    Abstract: A low permittivity connector for providing a plurality of contacts disposed substantially parallel at predetermined spacings relative to each other. Ribbon-type conductors are disposed on a low-permittivity dielectric sheet and exposed on at least one side of the sheet. Wires are contacting respective ribbon-type conductors, disposed in a longitudinal direction relative to the conductors, and projecting as pins from an edge at one end of the low-permittivity dielectric sheet. A housing holds the low-permittivity dielectric sheet, the ribbon-type conductors, and the wires by way of joining sheets and having openings in the area of the ribbon-type conductors at a second end of the low-permittivity sheet for allowing insertion of pins projected from a like connector. A flat cable comprises a plurality of wires formed of a hard cord covered by a conductive layer, plurality of ribbon-type contacts contacting respective wires and a sheet which supports the ribbon-type contacts.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: May 8, 1990
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4895756
    Abstract: A printed circuit is provided wherein the electrically conductive material which forms the circuit elements is embedded within a dielectric substrate. The preferred dielectric substrate is porous, expanded polytetrafluoroethylene.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: January 23, 1990
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4857381
    Abstract: A reinforced porous dielectric sheet of expanded polytetrafluoroethylene is provided wherein solid plastic reinforcement elements in the form of circular columns or wall-like partitions extending through the dielectric sheet from one surface to the other are distributed within the sheet. The reinforced sheet is useful as a substrate for printed circuit boards. The reinforcement elements are preferably of a tetrafluoroethylene/ethylene copolymer or an epoxy resin.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: August 15, 1989
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4825221
    Abstract: Means are provided for radiating electromagnetic waves from a receiving end zone of a dielectric line for transmitting electromagnetic waves without the need for a metal horn antenna or a metal waveguide, and matching problems are thereby substantially avoided. Said means are provided by shaping the end of the line to specified contours, by varying the dielectric constant of the material of the line in a gradient longitudinally near the end zone of the line, and by arranging a reflecting mirror or lens to receive the waves emitted from the line. This waveguide is useful in wireless communications, radar transmission and similar applications.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: April 25, 1989
    Assignee: Junkosha Co., Ltd.
    Inventors: Hirosuke Suzuki, Hiromi Yasumoto, Haruo Imaizumi
  • Patent number: 4796046
    Abstract: A copy machine toner fixing device is provided having a plurality of rollers in which adjacent rollers are in contact under pressure, wherein at least one of the rollers is covered with a non-adhesive coating layer and copy paper carrying toner images thereon is passed between the rollers to fix the toner images on the paper, characterized in that the coating layer is an open celled, cellular plastic film wound around the periphery of the roller. A preferred film is expanded, porous polytetrafluoroethylene. The outer surface of the coating layer may advantageously be rendered non-porous by application of compression forces externally to the coating layer. Electroconductive filler may be advantageously incorporated into the open celled plastic film.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: January 3, 1989
    Inventors: Hirosuke Suzuki, Etsuo Yamazaki, Yoshiaki Sato
  • Patent number: 4791930
    Abstract: A cooling device is provided for use in cooling surrounding human tissue during hyperthermia treatment of a cancerous tumor. The device comprises at least one tube constructed of a fluororesin having continuous pores, such as porous, expanded polytetrafluoroethylene, placed in a desired configuration adjacent the tissue to be cooled, and through which flows a coolant. Microwaves used in hyperthermia treatment of cancerous tumors can pass through the device and heat the tumor to be treated to a higher degree than heretofore possible because the adjacent noncancerous tissue can now be cooled. Because the tube is porous, the cooling effect is pronounced.
    Type: Grant
    Filed: October 18, 1983
    Date of Patent: December 20, 1988
    Assignee: Junkosha Co., Ltd.
    Inventors: Hirosuke Suzuki, Satoru Kobayashi
  • Patent number: 4755911
    Abstract: A multilayer printed circuit board is provided comprising a plurality of printed circuit boards laminated together, each board being separated from an adjacent board by a layer of a dielectric of porous, expanded polytetrafluoroethylene (PTFE). The dielectric layer may have an adhesive on its surface(s) affixed as a layer or in a pattern of dots. Alternatively, an adhesive may be impregnated within the pores of the porous dielectric. In a preferred embodiment, the dielectric has additional openings or through holes in it, in additon to the pores of the porous dielectric.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: July 5, 1988
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4750497
    Abstract: A temperature sensor is provided comprising an electrical temperature sensing element such as a thermistor and a pair of high-resistance conductors of conductive fluorocarbon resin which are electrically connected to the electrical temperature sensing element. The conductors of conductive fluorocarbon resin are disposed on opposite surfaces of a body of fluorocarbon resin. The electrical temperature sensing element may be sandwiched between the pair of high-resistance conductors. Alternatively, the temperature sensor comprises a temperature sensing element held in place and in electrical contact between a pair of conductive fluorocarbon sheets, the sheets being fused one to each side of an electrically insulative sheet of fluorocarbon resin, thereby forming a laminated composite in sheet form, the laminate being vertically separated along its longitudinal axis remote from the temperature sensing element, thereby providing a 4-lead temperature sensor.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: June 14, 1988
    Assignee: Junkosha Co., Ltd.
    Inventors: Hirosuke Suzuki, Satoru Kobayashi, Yoshiaki Sato
  • Patent number: 4741594
    Abstract: An optical transmission line is provided comprising an elongate light guide surrounded by a layer of a porous plastic, preferably expanded, porous polytetrafluoroethylene, and having at least one reinforcing strand, such as a wire, positioned outside of the porous plastic layer, this entire assembly encased in a resin sheath having a rectangular cross-section such that the light guide is positioned at the center of the cross-section of the resin sheath along the length of this transmission line. Multiconductor flat cable is provided by bonding a multiplicity of these optical transmission lines together. The transmission line is useful for transmitting optical energy signals.
    Type: Grant
    Filed: October 2, 1984
    Date of Patent: May 3, 1988
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4730088
    Abstract: A high speed electrical transmission line is provided comprising a signal conductor having an open cell, continuously porous, polymeric insulating material surrounding the conductor, the insulating material having a plurality of openings fused therein, the walls of the openings being solid, fused polymer which provide compressive strength for the otherwise highly compressible porous insulating material. The preferred polymer is expanded, porous polytetrafluoroethylene. The openings may be formed by a laser or by other means.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: March 8, 1988
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4707671
    Abstract: An electrical transmission unit line is provided comprising a porous dielectric layer having positioned on one side thereof a pair of narrow, parallel elongated electrical conductors and on the other side thereof, opposite the pair of conductors and extending transversely across both wires of the pair and parallel thereto, a wide ground conductor. An electrical transmission line having a plurality of such unit lines is also provided. The porous dielectric is preferably porous, expanded polytetrafluoroethylene. The transmission lines are covered with an electrically insulating material, preferably a nonporous plastic.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: November 17, 1987
    Assignee: Junkosha Co., Ltd.
    Inventors: Hirosuke Suzuki, Tetsuro Umebayashi
  • Patent number: 4701362
    Abstract: A dielectric sheet material useful in electronics applications is provided. The material preferably is porous, expanded polytetrafluoroethylene (PTFE) having a plurality of through-holes. The walls of the through-holes are solid, sintered PTFE which impart a high degree of compressive strength to the otherwise highly compressible porous PTFE. The through-holes having solid walls may be formed in the material by a laser or by other means.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: October 20, 1987
    Assignee: Junkosha Co., Ltd.
    Inventors: Hirosuke Suzuki, Haruo Imaizumi
  • Patent number: 4649228
    Abstract: An electrical transmission line is provided comprising at least one elongate signal conductor, one or more other conductors placed away from and substantially parallel to said signal conductor, all conductors encased in an outer insulating resin covering having a rectangular cross-section, the signal conductor(s) being further encased in an inner insulating porous resin covering, the porous resin covering having an electrical shielding layer thereover.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: March 10, 1987
    Assignee: Junkosha Co., Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4645868
    Abstract: A high speed electrical transmission line is provided comprising a plurality of elongate conductor wires arranged in parallel relationship and encased in an outer insulating covering jacket having generally a rectangular cross-section and wherein each conductor is further encased within the outer jacket in an insulating covering of a porous resin material.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: February 24, 1987
    Assignee: Junkosha Company, Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4640866
    Abstract: A printed circuit board is provided comprising at least one layer of metal firmly bonded in laminar contact with at least one layer of solid, sintered polytetrafluoroethylene (PTFE). In one embodiment, the solid PTFE layer contains fibers of porous, expanded, sintered PTFE mixed within it. In another embodiment, the solid PTFE layer is firmly bonded to the metal layer on one side and is firmly bonded on the other side to a layer of porous, expanded, sintered PTFE.
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: February 3, 1987
    Assignee: Junkosha Company Ltd.
    Inventor: Hirosuke Suzuki
  • Patent number: 4639693
    Abstract: An improved strip line cable for transmission of electromagnetic waves in the millimeter wave length range is provided. The cable has a plurality of face to face conductors in pairs, the conductors being separated from their paired counterparts by a porous plastic dielectric insulation material. The cable is jacketed. The improvement comprises the porous plastic dielectric material being, in addition, placed between each conductor and the jacketing material, thereby resulting in each conductor being effectively surrounded by porous plastic dielectric insulating material.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: January 27, 1987
    Assignee: Junkosha Company, Ltd.
    Inventors: Hirosuke Suzuki, Hiromi Yasumoto, Hiroshi Umemoto
  • Patent number: 4594638
    Abstract: A liquid leak detecting sensor in the form of a coaxial cable assembly is provided in which means are provided for enhancing the passage of leaks from the outer surface of the outer conductor into the sensing layer which separates the inner and outer conductors. The change in permittivity of the sensing layer caused by the leak enables rapid detection of the location of the leak along the cable.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: June 10, 1986
    Assignee: Junkosha Co. Ltd.
    Inventors: Hirosuke Suzuki, Satoru Kobayashi, Katsuo Shimosawa
  • Patent number: 4559254
    Abstract: A sheet of porous resinous material, particularly polytetrafluoroethylene, having a multiplicity of holes formed therethrough. The holes are provided in a plurality of rows extending along the length of the sheet. The sheet has a smaller thickness in the area extending along each row of holes than in its remaining portions.
    Type: Grant
    Filed: May 4, 1982
    Date of Patent: December 17, 1985
    Assignee: Junkosha Company Ltd.
    Inventor: Hirosuke Suzuki