Patents by Inventor Hisashi Urasaki
Hisashi Urasaki 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: 10128071Abstract: Disclosed is an abrasion resistant material having low cost and excellent abrasion resistance, a puffer cylinder, and a puffer type gas circuit breaker. The abrasion resistant material includes: a base material which is formed of pure aluminum or aluminum alloy and has an unevenness structure formed on its surface; and an aluminum hydrated oxide film which is formed on the surface of the base material, wherein a surface of the aluminum hydrated oxide film is provided with an unevenness structure which is finer than the unevenness structure of the base material.Type: GrantFiled: September 16, 2015Date of Patent: November 13, 2018Assignee: HITACHI, LTD.Inventors: Masahiko Ono, Makoto Hirose, Daisuke Ebisawa, Hisashi Urasaki
-
Publication number: 20170271113Abstract: Disclosed is an abrasion resistant material having low cost and excellent abrasion resistance, a puffer cylinder, and a puffer type gas circuit breaker. The abrasion resistant material includes: a base material which is formed of pure aluminum or aluminum alloy and has an unevenness structure formed on its surface; and an aluminum hydrated oxide film which is formed on the surface of the base material, wherein a surface of the aluminum hydrated oxide film is provided with an unevenness structure which is finer than the unevenness structure of the base material.Type: ApplicationFiled: September 16, 2015Publication date: September 21, 2017Applicant: HITACHI, LTD.Inventors: Masahiko ONO, Makoto HIROSE, Daisuke EBISAWA, Hisashi URASAKI
-
Patent number: 9673005Abstract: The invention provides a switchgear that is capable of increasing a degree of freedom of a position of a moving arcing contact in a circuit breaker, does not require dimension management of components and a mechanism for adjusting a position of the moving arcing contact, and is capable of simplifying fabrication of components and assembly of devices and reducing cost.Type: GrantFiled: October 2, 2014Date of Patent: June 6, 2017Assignee: Hitachi, Ltd.Inventors: Hisashi Urasaki, Makoto Hirose, Masataka Sasaki, Yoichi Oshita, Yasuaki Aoyama
-
Patent number: 9653239Abstract: The present invention includes a wear-resistant material including: a base material formed of pure aluminum or an aluminum alloy having a projection, and a depression in a pit-like shape on a surface thereof; and a coat including a dehydrate of a hydrated oxide of aluminum, the coat being formed on a surface of the base material. Further, the present invention including a method for producing a wear-resistant material including the steps of: forming a hydrated oxide coat of aluminum on a surface of the base material by a chemical conversion coating; and heating the hydrated oxide coat. Further, the present invention also includes a puffer cylinder and a puffer-type gas circuit breaker applied to the above wear-resistant material.Type: GrantFiled: July 18, 2014Date of Patent: May 16, 2017Assignee: Hitachi, Ltd.Inventors: Masahiko Ono, Makoto Hirose, Daisuke Ebisawa, Hisashi Urasaki
-
Patent number: 9604881Abstract: The present invention includes a wear-resistant material including: a base material formed of pure aluminum or an aluminum alloy having a finely asperity structure on a surface thereof; and a coat including a hydrated oxide coat of aluminum, the coat being formed on the surface of the base material. Further, the present invention including a puffer cylinder including: a finely asperity structure on an inner-wall surface thereof; and a coat including a hydrated oxide coat of aluminum, the coat being formed on the inner-wall surface of the puffer cylinder. The present invention also includes a puffer-type gas circuit breaker includes the above puffer cylinder.Type: GrantFiled: June 17, 2014Date of Patent: March 28, 2017Assignee: Hitachi, Ltd.Inventors: Masahiko Ono, Makoto Hirose, Daisuke Ebisawa, Hisashi Urasaki
-
Publication number: 20160268076Abstract: The invention provides a switchgear that is capable of increasing a degree of freedom of a position of a moving arcing contact in a circuit breaker, does not require dimension management of components and a mechanism for adjusting a position of the moving arcing contact, and is capable of simplifying fabrication of components and assembly of devices and reducing cost.Type: ApplicationFiled: October 2, 2014Publication date: September 15, 2016Applicant: Hitachi, Ltd.Inventors: Hisashi URASAKI, Makoto HIROSE, Masataka SASAKI, Yoichi OSHITA, Yasuaki AOYAMA
-
Publication number: 20150060408Abstract: The present invention includes a wear-resistant material including: a base material formed of pure aluminum or an aluminum alloy having a projection, and a depression in a pit-like shape on a surface thereof; and a coat including a dehydrate of a hydrated oxide of aluminum, the coat being formed on a surface of the base material. Further, the present invention including a method for producing a wear-resistant material including the steps of: forming a hydrated oxide coat of aluminum on a surface of the base material by a chemical conversion coating; and heating the hydrated oxide coat. Further, the present invention also includes a puffer cylinder and a puffer-type gas circuit breaker applied to the above wear-resistant material.Type: ApplicationFiled: July 18, 2014Publication date: March 5, 2015Inventors: Masahiko ONO, Makoto HIROSE, Daisuke EBISAWA, Hisashi URASAKI
-
Publication number: 20140367360Abstract: The present invention includes a wear-resistant material including: a base material formed of pure aluminum or an aluminum alloy having a finely asperity structure on a surface thereof; and a coat including a hydrated oxide coat of aluminum, the coat being formed on the surface of the base material. Further, the present invention including a puffer cylinder including: a finely asperity structure on an inner-wall surface thereof; and a coat including a hydrated oxide coat of aluminum, the coat being formed on the inner-wall surface of the puffer cylinder. The present invention also includes a puffer-type gas circuit breaker includes the above puffer cylinder.Type: ApplicationFiled: June 17, 2014Publication date: December 18, 2014Inventors: Masahiko ONO, Makoto HIROSE, Daisuke EBISAWA, Hisashi URASAKI
-
Patent number: 8804298Abstract: The present invention is provided to satisfy insulation and conductivity performance requirements, to reduce the size of a gas insulated bus, and also to make conditioning for a particle more reliable. In a gas insulated bus having a conductor supported in a cylindrical metal container via an insulator, insulating gas being contained in the metal container, the metal container has an expanded diameter part formed over a given range in an area of the metal container in which the insulator is positioned and a reduced diameter part formed over the entire area of the metal container except for the expanded diameter part. Thus, when the temperature of the insulator increases during conduction, heat from the insulator is transferred to the metal container via a large space in the expanded diameter part and released to the air through a large outer surface of the expanded diameter part of the metal container.Type: GrantFiled: May 3, 2012Date of Patent: August 12, 2014Assignee: Hitachi, Ltd.Inventors: Tatsuro Kato, Toshiaki Rokunohe, Hisashi Urasaki, Ryoichi Shinohara
-
Publication number: 20140144883Abstract: A gas circuit breaker includes a circuit-breaking portion provided within a tank. The tank is filled with insulating gas and disposed in an upright position. The circuit-breaking portion is connected to a bus through a main circuit conductor. The circuit-breaking portion has an operation unit disposed outside the tank. The operation unit is an electric linear motor operation unit composed of a driving portion and a driving energy storage portion. The driving portion is adjacent to the tank. The driving energy storage portion is separated from the driving portion. The driving energy storage portion and the driving portion are electrically connected.Type: ApplicationFiled: November 19, 2013Publication date: May 29, 2014Applicant: Hitachi, Ltd.Inventors: Hisashi URASAKI, Masanori TSUKUSHI
-
Publication number: 20120281332Abstract: The present invention is provided to satisfy insulation and conductivity performance requirements, to reduce the size of a gas insulated bus, and also to make conditioning for a particle more reliable. In a gas insulated bus having a conductor supported in a cylindrical metal container via an insulator, insulating gas being contained in the metal container, the metal container has an expanded diameter part formed over a given range in an area of the metal container in which the insulator is positioned and a reduced diameter part formed over the entire area of the metal container except for the expanded diameter part. Thus, when the temperature of the insulator increases during conduction, heat from the insulator is transferred to the metal container via a large space in the expanded diameter part and released to the air through a large outer surface of the expanded diameter part of the metal container.Type: ApplicationFiled: May 3, 2012Publication date: November 8, 2012Applicant: Hitachi, Ltd.Inventors: Tatsuro KATO, Toshiaki Rokunohe, Hisashi Urasaki, Ryoichi Shinohara