Patents by Inventor Kazuyuki Ozai

Kazuyuki Ozai 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: 10063016
    Abstract: An electric connector includes a socket connector, a bar-like plug connector to be inserted/withdrawn to/from the socket connector and a fuse. When the plug connector is inserted to the socket connector, electric conduction is established in the electric circuit via the fuse. The fuse is attached to the socket connector.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: August 28, 2018
    Assignees: Kubota Corporation, DDK Ltd.
    Inventors: Hirokazu Ito, Kazuo Koike, Masatake Takai, Koichi Yokota, Kazuyuki Ozai
  • Publication number: 20170070011
    Abstract: An electric connector includes a socket connector, a bar-like plug connector to be inserted/withdrawn to/from the socket connector and a fuse. When the plug connector is inserted to the socket connector, electric conduction is established in the electric circuit via the fuse. The fuse is attached to the socket connector.
    Type: Application
    Filed: June 10, 2016
    Publication date: March 9, 2017
    Inventors: Hirokazu Ito, Kazuo Koike, Masatake Takai, Koichi Yokota, Kazuyuki Ozai
  • Patent number: 7575466
    Abstract: An electrical connector to be detachably fitted with a mating connector, including a plurality of contacts, a housing for arranging and holding the contacts, and a shell covering the housing and forming with the housing a fitting opening for the mating connector. The shell has at least one engaging piece, and the housing has an anchoring portion at a location corresponding to the engaging piece to cause the anchoring portion to engage the engaging piece, thereby restraining the housing from being displaced in the direction opposite to the fitting direction upon fitting with the mating connector. Even being miniaturized, the electrical connector is securely positioned relative to the mating connector when fitting with it, and the housing is securely prevented from being displaced upon the mating connector abutting against the housing, thereby completely preventing any defective connection.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: August 18, 2009
    Assignee: DDK Ltd.
    Inventors: Shinya Ishizuka, Akio Yamada, Kazuyuki Ozai, Hiromichi Kato
  • Patent number: 7540770
    Abstract: An electrical connector detachably fitted with a mating connector includes a plurality of contacts, a housing arranging and holding the contacts therein and having guide portions for guiding the mating connector, and fixtures to be fixed to a substrate. The fixtures are made of a metal and each include the guide portion in the form of a substantially U-shape integrally formed therewith. A free end of the guide portion is provided on each of its both sides with an extending piece downwardly extending and adapted to be inserted into an inserting groove of the housing. The housing is provided with the inserting grooves at locations corresponding to the extending pieces for inserting the extending pieces, respectively, and is provided with slits, one at each of its longitudinal ends, to form holding portions having elasticity, thereby holding the guide portions of the fixtures therein.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: June 2, 2009
    Assignee: DDK Ltd.
    Inventors: Shinya Ishizuka, Kazuyuki Ozai, Hirokazu Takahashi, Akio Yamada
  • Publication number: 20080214050
    Abstract: An electrical connector to be detachably fitted with a mating connector, including a plurality of contacts, a housing for arranging and holding the contacts, and a shell covering the housing and forming with the housing a fitting opening for the mating connector. The shell has at least one engaging piece, and the housing has an anchoring portion at a location corresponding to the engaging piece to cause the anchoring portion to engage the engaging piece, thereby restraining the housing from being displaced in the direction opposite to the fitting direction upon fitting with the mating connector. Even being miniaturized, the electrical connector is securely positioned relative to the mating connector when fitting with it, and the housing is securely prevented from being displaced upon the mating connector abutting against the housing, thereby completely preventing any defective connection.
    Type: Application
    Filed: January 11, 2008
    Publication date: September 4, 2008
    Applicant: DDK LTD.
    Inventors: Shinya ISHIZUKA, Akio Yamada, Kazuyuki Ozai, Hiromichi Kato
  • Publication number: 20080214031
    Abstract: An electrical connector includes a plurality of contacts to be connected to a cable, a housing for arranging and holding the contacts, a shell dividable into two shells covering the housing and having a holding device for holding the cable, and an insulating member covering the shell. One of the shells is provided with anchoring portions and the other shell is provided with engaging portions so that when both the shells are fitted with each other, the anchoring portions and the engaging portions are engaged with each other to bring both the shells into electrical continuity with each other. Therefore, the shells can be securely held together to achieve reliable electrical continuity between the shells, and at the same time grounding between the cable and the shell and between the shells themselves can be achieved.
    Type: Application
    Filed: February 26, 2008
    Publication date: September 4, 2008
    Applicant: DDK LTD.
    Inventors: Shinya ISHIZUKA, Akio YAMADA, Kazuyuki OZAI, Hiromichi KATO
  • Publication number: 20070155227
    Abstract: An electrical connector detachably fitted with a mating connector includes a plurality of contacts, a housing arranging and holding the contacts therein and having guide portions for guiding the mating connector, and fixtures to be fixed to a substrate. The fixtures are made of a metal and each include the guide portion in the form of a substantially U-shape integrally formed therewith. A free end of the guide portion is provided on each of its both sides with an extending piece downwardly extending and adapted to be inserted into an inserting groove of the housing. The housing is provided with the inserting grooves at locations corresponding to the extending pieces for inserting the extending pieces, respectively, and is provided with slits, one at each of its longitudinal ends, to form holding portions having elasticity, thereby holding the guide portions of the fixtures therein.
    Type: Application
    Filed: December 11, 2006
    Publication date: July 5, 2007
    Inventors: Shinya Ishizuka, Kazuyuki Ozai, Hirokazu Takahashi, Akio Yamada
  • Patent number: 7238054
    Abstract: A connector includes a plurality of contacts each having at one end a contact portion adapted to contact a connecting object, at the other end a connection portion to be connected to a substrate or the like, and between the contact and connection portions a fixed portion to be arranged and held in a housing so that the contact portion is displaceable about the fixed portion as a fulcrum in a cantilevered manner relative to the housing arranging and holding the contacts. If the thickness of the housing where the contact portions of the contacts are displaceable is not more than 0.6 to 0.7 mm, the housing is provided with a protrusion formed with a hole to permit the contact portions to be displaceable in the hole, thereby ensuring sufficient contact pressures to obtain stable connection with a mating connector without unintended deformations of the contacts.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: July 3, 2007
    Assignee: DDK Ltd.
    Inventors: Takuya Higeta, Kazuyuki Ozai
  • Patent number: 7232345
    Abstract: An electrical connector includes a housing, a substrate, and shielding plates. The housing has an inserting hole for the substrate, and the substrate has a plurality of signal patterns and a plurality of ground patterns alternately arranged on at least one surface of the substrate in a manner that one signal pattern is between two ground patterns. The signal patterns and the ground patterns each have a contact portion to contact a mating object and a connection portion to be connected to a cable. The shielding plates are each connected to the connection portion of the ground pattern for shielding. With this construction, the electrical connector achieves its miniaturization and reduction in crosstalk regardless of length of connected cables.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: June 19, 2007
    Assignee: DDK Ltd.
    Inventors: Shinya Ishizuka, Kazuyuki Ozai
  • Publication number: 20070032104
    Abstract: An electrical connector includes, in substitution for contacts, a substrate having a plurality of signal patterns and a plurality of ground patterns on at least one surface, each of these patterns having at one end a contact portion adapted to contact a mating object and at the other end a connection portion to be connected to a cable, a housing having an inserting hole for inserting the substrate therethrough, and holding members for fixing the substrate to the housing. A capacitor and a resistance chip connected in parallel are mounted on at least one of the signal patterns. In this manner, the connector achieves its miniaturization, stability of impedance, reduction in cross talk, and better return loss level and transmission characteristics.
    Type: Application
    Filed: August 9, 2006
    Publication date: February 8, 2007
    Inventors: Akio Yamada, Kazuyuki Ozai, Shinya Ishizuka
  • Publication number: 20060189182
    Abstract: A connector includes a plurality of contacts each having at one end a contact portion adapted to contact a connecting object, at the other end a connection portion to be connected to a substrate or the like, and between the contact and connection portions a fixed portion to be arranged and held in a housing so that the contact portion is displaceable about the fixed portion as a fulcrum in a cantilevered manner relative to the housing arranging and holding the contacts. If the thickness of the housing where the contact portions of the contacts are displaceable is not more than 0.6 to 0.7 mm, the housing is provided with a protrusion formed with a hole to permit the contact portions to be displaceable in the hole, thereby ensuring sufficient contact pressures to obtain stable connection with a mating connector without unintended deformations of the contacts.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 24, 2006
    Inventors: Takuya Higeta, Kazuyuki Ozai
  • Publication number: 20060128213
    Abstract: A connector includes a plurality of contacts, an insulator for arranging and holding the contacts, and a nut for securing the connector to a substrate or panel. The insulator is provided at a predetermined position with a flange which is formed with an inserting portion for accommodating the nut, and at the inserting portion at least two elastic pieces are arranged which are elastically deformable and adapted to engage the nut. The nut holding structure thus constructed for the connector is able to securely hold the nut with the simple construction without any fracture of the insulator.
    Type: Application
    Filed: November 15, 2005
    Publication date: June 15, 2006
    Inventors: Takuya Higeta, Kazuyuki Ozai
  • Patent number: 7060904
    Abstract: A cable connecting structure for connecting a cable including cable cores each having a core conductor and a core sheath to an electrical connector in which the leading end of the cable is peeled to expose the core conductors of the cable cores and the exposed core conductors are connected to contacts of the electrical connector. A dielectric member having air contained therein is arranged to cover at least part of the exposed portions of the cable cores of the cable. With this construction, it is possible to restrain characteristic impedances at the exposed portions of the cable cores, which tend to become higher.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: June 13, 2006
    Assignee: DDK Ltd.
    Inventors: Kazuyuki Ozai, Shinya Ishizuka
  • Patent number: 7021970
    Abstract: A connector includes a block and a required number of contacts held and fixed in the block. A plate-shaped piece made of a heat resistant and electrically insulating material is fixed to the block on that side of the contacts to which conductors are connected. The plate-shaped piece is preferably formed with grooves with a predetermined interval on that surface of the piece on which the contacts are arranged. With this construction, it is possible to provide an improved connector which is able to prevent the block from being deformed due to heating in soldering and welding when connecting conductors, and is free from any defective connection and failed insulation without raising the manufacturing and operating cost.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: April 4, 2006
    Assignee: DDK Ltd.
    Inventor: Kazuyuki Ozai
  • Patent number: 7014476
    Abstract: An electrical connector includes an elastomer in the form of a layer, and a plurality of fine conductive wires embedded in the elastomer and extending rectilinearly in vertical directions to front and rear surfaces of the elastomer. The fine conductive wires have an overall length substantially the same as or slightly larger than the thickness of the elastomer so that both the ends of the fine conductive wires extend from the front and rear surfaces of the elastomer. The electrical connector includes a flexible printed circuit board connected to the fine conductive wires. The flexible printed circuit board includes at least three electric contacts arranged substantially concentrically around and electrically connected to each of the fine conductive wires. With this arrangement, the electrical connector enables a stable inspection for integrated circuit pads in a manner which minimizes irregularities in repeatedly measured values of electric resistance and skew.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: March 21, 2006
    Assignee: DDK Ltd.
    Inventors: Tomonari Ohtsuki, Kazuyuki Ozai
  • Publication number: 20060003639
    Abstract: An electrical connector includes a housing, a substrate, and shielding plates. The housing has an inserting hole for the substrate, and the substrate has a plurality of signal patterns and a plurality of ground patterns alternately arranged on at least one surface of the substrate in a manner that one signal pattern is between two ground patterns. The signal patterns and the ground patterns each have a contact portion to contact a mating object and a connection portion to be connected to a cable. The shielding plates are each connected to the connection portion of the ground pattern for shielding. With this construction, the electrical connector achieves its miniaturization and reduction in crosstalk regardless of length of connected cables.
    Type: Application
    Filed: June 28, 2005
    Publication date: January 5, 2006
    Inventors: Shinya Ishizuka, Kazuyuki Ozai
  • Publication number: 20050233612
    Abstract: An electrical connector includes an elastomer in the form of a layer, and a plurality of fine conductive wires embedded in the elastomer and extending rectilinearly in vertical directions to front and rear surfaces of the elastomer. The fine conductive wires have an overall length substantially the same as or slightly larger than the thickness of the elastomer so that both the ends of the fine conductive wires extend from the front and rear surfaces of the elastomer. The electrical connector includes a flexible printed circuit board connected to the fine conductive wires. The flexible printed circuit board includes at least three electric contacts arranged substantially concentrically around and electrically connected to each of the fine conductive wires. With this arrangement, the electrical connector enables a stable inspection for integrated circuit pads in a manner which minimizes irregularities in repeatedly measured values of electric resistance and skew.
    Type: Application
    Filed: April 11, 2005
    Publication date: October 20, 2005
    Inventors: Tomonari Ohtsuki, Kazuyuki Ozai
  • Patent number: 6951487
    Abstract: A multiconductor connector for high-speed transmission signal for connecting a plurality of paired cables includes an insulator plate having signal contacts on its upper and lower surfaces. The signal contacts are arranged in a row on each of the upper and lower surfaces to form pairs of the two signal contacts aligned with each other above and below across the insulator plate. The insulator plate has a thickness so determined that when a pair of terminal of each of the paired cables are exposed at their one ends by removing their insulating coverings and then fitted on the insulator plate without changing the initial spacing between the pair of terminals in a manner embracing the insulator plate by the pair of terminals on the upper and lower surfaces, the pair of terminals are electrically connected to a pair of the signal contacts on the upper and lower surfaces of the insulator plate. With this arrangement, good impedance characteristics at the one ends of the paired cables can be maintained.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: October 4, 2005
    Assignee: DDK LTD
    Inventor: Kazuyuki Ozai
  • Patent number: 6869319
    Abstract: A misconnection-proof key comprises a substantially L-shaped block made of a hard metal including a short arm and a long arm intersecting with the short arm at right angles thereto. The long arm has at a substantially mid portion on its surface a removal preventing protrusion integrally formed therewith. A plurality of misconnection-proof keys thus constructed are used in a connector including an insulating block having a number of contacts, and a metal shell partly covering the insulating block on the side of contact portions of the contacts. The plurality of misconnection-proof keys are each inserted with the long arm into a slot formed at a predetermined position between the insulating block and the metal shell until the removal preventing protrusion is fitted in a removal preventing recess or aperture formed in the slot so that the short arm of the key extending outwardly of the slot.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: March 22, 2005
    Assignee: DDK Ltd.
    Inventors: Akio Yamada, Kazuyuki Ozai, Shinya Ishizuka, Kazuhiro Sato
  • Patent number: D543944
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: June 5, 2007
    Assignee: DDK Ltd.
    Inventors: Akio Yamada, Kazuyuki Ozai, Shinya Ishizuka, Hirokazu Takahashi