Patents by Inventor Katsuo Shibahara
Katsuo Shibahara 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).
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Patent number: 11428266Abstract: Provided is a slide bearing (bearing sleeve (8)), comprising an oxidized green compact in which particles (11) of metal powder are bonded to each other by an oxide film (12) formed on surfaces of the particles (11). The oxidized green compact has a bearing surface (A, B) configured to slide, through intermediation of a lubricating film, relative to a mating member (shaft member (2)) to be supported. The bearing surface (A, B) has a large number of opening portions (13a), and the large number of opening portions (13a) and inner pores (13b) are interrupted in communication therebetween by the oxide film (12).Type: GrantFiled: September 4, 2017Date of Patent: August 30, 2022Assignee: NTN CORPORATIONInventors: Takao Arai, Fuyuki Ito, Tetsuya Kurimura, Shinji Komatsubara, Katsuo Shibahara, Kazuyoshi Harada
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Patent number: 11133579Abstract: A vehicle-mounted fin type antenna device 1 includes a plurality of antenna units 5a to 5d, a circuit board 4 electrically connected to the plurality of antenna units 5a to 5d, and a radome 3 accommodating the plurality of antenna units 5a to 5d and the circuit board 4 in an inside of the radome. The radome 3 is formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100° C. or more.Type: GrantFiled: October 18, 2018Date of Patent: September 28, 2021Assignee: NTN CORPORATIONInventors: Tomokazu Sonozaki, Natsuhiko Mori, Fuminori Satoji, Katsuo Shibahara
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Publication number: 20210285491Abstract: Provided is a slide bearing (bearing sleeve (8)), comprising an oxidized green compact in which particles (11) of metal powder are bonded to each other by an oxide film (12) formed on surfaces of the particles (11). The oxidized green compact has a bearing surface (A, B) configured to slide, through intermediation of a lubricating film, relative to a mating member (shaft member (2)) to be supported. The bearing surface (A, B) has a large number of opening portions (13a), and the large number of opening portions (13a) and inner pores (13b) are interrupted in communication therebetween by the oxide film (12).Type: ApplicationFiled: September 4, 2017Publication date: September 16, 2021Inventors: Takao ARAI, Fuyuki ITO, Tetsuya KURIMURA, Shinji KOMATSUBARA, Katsuo SHIBAHARA, Kazuyoshi HARADA
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Publication number: 20200295443Abstract: A vehicle-mounted fin type antenna device 1 includes a plurality of antenna units 5a to 5d, a circuit board 4 electrically connected to the plurality of antenna units 5a to 5d, and a radome 3 accommodating the plurality of antenna units 5a to 5d and the circuit board 4 in an inside of the radome. The radome 3 is formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100° C. or more.Type: ApplicationFiled: October 18, 2018Publication date: September 17, 2020Inventors: Tomokazu SONOZAKI, Natsuhiko MORI, Fuminori SATOJI, Katsuo SHIBAHARA
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Patent number: 9634384Abstract: After a three-dimensional antenna pattern (10) is formed by bending a conductive plate, the three-dimensional antenna pattern (10) thus bent is supplied in an injection molding die set as an insert component and a base (20) is formed by injection molding of a resin. With this, a chip antenna (1) comprising the three-dimensional antenna pattern (10) can be formed easier as comparison to a case where the antenna pattern is formed over a plurality of surfaces by printing and the like.Type: GrantFiled: September 2, 2011Date of Patent: April 25, 2017Assignee: NTN CORPORATIONInventors: Katsuo Shibahara, Natsuhiko Mori, Tatsuya Hayashi
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Publication number: 20130207849Abstract: After a three-dimensional antenna pattern (10) is formed by bending a conductive plate, the three-dimensional antenna pattern (10) thus bent is supplied in an injection molding die set as an insert component and a base (20) is formed by injection molding of a resin. With this, a chip antenna (1) comprising the three-dimensional antenna pattern (10) can be formed easier as comparison to a case where the antenna pattern is formed over a plurality of surfaces by printing and the like.Type: ApplicationFiled: September 2, 2011Publication date: August 15, 2013Inventors: Katsuo Shibahara, Natsuhiko Mori, Tatsuya Hayashi
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Patent number: 8506167Abstract: The present invention has an object of improving wear resistance of a thrust bearing portion. A pressure is generated by a dynamic pressure effect of a lubricating oil in a thrust bearing gap between a thrust bearing surface including dynamic pressure generating grooves and a smooth thrust receiving surface so as to rotatably support a shaft member in an axial direction. The thrust receiving surface is formed as a flat surface, whereas an inclined plane is provided on the thrust bearing surface so as to provide a reduced portion having a decreasing axial width in a radially outward direction in the thrust bearing gap.Type: GrantFiled: March 17, 2005Date of Patent: August 13, 2013Assignee: NTN CorporationInventors: Tatsuya Hayashi, Tatsuo Kawase, Kiyotaka Kusunoki, Isao Komori, Katsuo Shibahara
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Patent number: 7798721Abstract: The present invention provides a fluid dynamic bearing device having high durability and capable of being produced at low cost. In the fluid dynamic bearing device, a housing and a disc hub are resin molded parts, and a thrust bearing gap is formed between an upper end surface of the housing and a lower end surface of the disc hub. In this case, the surfaces function as sliding portions temporarily in sliding contact with each other during operation of the bearing. A diameter of PAN-based carbon fibers blended as reinforcement fibers in the resin housing is 12 ?m or less, and the blending amount is within a range of 5 to 20 vol %, thereby making it possible to prevent occurrence of flaws and wear in the sliding portions.Type: GrantFiled: March 17, 2005Date of Patent: September 21, 2010Assignee: NTN CorporationInventors: Katsuo Shibahara, Kenji Ito, Isao Komori, Ryouichi Nakajima, Tetsuya Kurimura
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Patent number: 7431505Abstract: A resin housing 7 is injection-molded by using a forming mold 11. Moreover, a concave shaped adhesive reservoir 10 is formed by a sink mark of the resin during injection molding on its inner circumferential surface 7e simultaneously with the injection molding of the housing 7. Accordingly, the adhesive can be prevented from overflowing and the adverse influence caused by the overflowing of the excessive adhesive can be avoided. A decrease in the molding precision of the housing can be also prevented and cost reduction by dispensing with a processing step can be enabled.Type: GrantFiled: January 4, 2006Date of Patent: October 7, 2008Assignee: NTN CorporationInventors: Katsuo Shibahara, Isao Komori
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Publication number: 20080037916Abstract: The present invention has an object of improving wear resistance of a thrust bearing portion. A pressure is generated by a dynamic pressure effect of a lubricating oil in a thrust bearing gap C between a thrust bearing surface 11a including dynamic pressure generating grooves and a smooth thrust receiving surface 11b so as to rotatably support a shaft member 2 in an axial direction. The thrust receiving surface 11b is formed as a flat surface, whereas an inclined plane 17 is provided on the thrust bearing surface 11a so as to provide a reduced portion 15 having a decreasing axial width in a radially outward direction in the thrust bearing gap C.Type: ApplicationFiled: March 17, 2005Publication date: February 14, 2008Inventors: Tatsuya Hayashi, Tatsuo Kawase, Kiyotaka Kusunoki, Isao Komori, Katsuo Shibahara
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Publication number: 20070274617Abstract: The present invention provides a fluid dynamic bearing device having high durability and capable of being produced at low cost. In the fluid dynamic bearing device, a housing (7) and a disc hub (3) are resin molded parts, and a thrust bearing gap is formed between an upper end surface (7d) of the housing (7) and a lower end surface (3e) of the disc hub (3). In this case, the surfaces (7d, 3e) function as sliding portions (P) temporarily in sliding contact with each other during operation of the bearing. A diameter of PAN-based carbon fibers blended as reinforcement fibers in the resin housing (7) is 12 ?m or less, and the blending amount is within a range of 5 to 20 vol %, thereby making it possible to prevent occurrence of flaws and wear in the sliding portions (P).Type: ApplicationFiled: March 17, 2005Publication date: November 29, 2007Applicant: NTN CORPORATIONInventors: Katsuo Shibahara, Kenji Ito, Isao Komori, Ryouichi Nakajima, Tetsuya Kurimura
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Publication number: 20070196035Abstract: The invention is aimed at further reducing the cost of a dynamic pressure bearing unit. In a shaft member 2, a shaft portion 2a is disposed with the outer circumferential surface thereof facing the inner circumferential surface of a bearing sleeve across a radial bearing gap, while a flange portion 2b is disposed with both end faces 2b1 and 2b2 thereof respectively facing one end face of the bearing sleeve and a bottom face of a housing across respective thrust bearing gaps, and the shaft member 2 is supported in a thrust direction in a noncontact fashion by a dynamic pressure occurring in each bearing gap. In the shaft member 2, the core of the shaft portion 2a and the flange portion 2b are both formed from a resin member 21, while the outer circumference of the shaft portion 2a is formed from a metal member 22.Type: ApplicationFiled: September 21, 2004Publication date: August 23, 2007Inventors: Katsuo Shibahara, Ryouichi Nakajima, Kenji Ito
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Publication number: 20070177831Abstract: A molten resin P is filled into a cavity 17 through a film gate 17a provided a ring shape in a position corresponding with an outer peripheral edge of the outside surface 7a2 of the seal portion 7a. The molded product removed from the molding die is completed by removing the residual resin gate portion 7d. A gate removal portion 7d1 formed by removing the resin gate portion appears as a narrow ring shape at the outer peripheral edge of the outside surface 7a2 of the seal portion 7a.Type: ApplicationFiled: August 18, 2004Publication date: August 2, 2007Inventor: Katsuo Shibahara
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Publication number: 20070025652Abstract: A fluid bearing device which enables cost reductions and prevents static electricity charging. A bearing sleeve is secured inside a housing, and a shaft member is inserted inside an inner peripheral surface of the bearing sleeve. A lubricating oil dynamic pressure effect is used to generate pressure within a bearing gap between the inner peripheral surface of the bearing sleeve and an outer peripheral surface of the shaft member, thereby supporting the shaft member in a non-contact manner in the radial direction. An axial end portion of the shaft member contacts a housing bottom portion, enabling conductivity between the two members, and the housing is made of a conductive resin composition containing added carbon nanofiber with a volume resistivity of 106 ?·cm or less.Type: ApplicationFiled: March 30, 2004Publication date: February 1, 2007Applicant: NTN CORPORATIONInventors: Fuminori Satoji, Kenji Itou, Katsuo Shibahara
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Publication number: 20060159374Abstract: A resin housing 7 is injection-molded by using a forming mold 11. Moreover, a concave shaped adhesive reservoir 10 is formed by a sink mark of the resin during injection molding on its inner circumferential surface 7e simultaneously with the injection molding of the housing 7. Accordingly, the adhesive can be prevented from overflowing and the adverse influence caused by the overflowing of the excessive adhesive can be avoided. A decrease in the molding precision of the housing can be also prevented and cost reduction by dispensing with a processing step can be enabled.Type: ApplicationFiled: January 4, 2006Publication date: July 20, 2006Inventors: Katsuo Shibahara, Isao Komori