Patents by Inventor Kenji Hibi
Kenji Hibi 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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Publication number: 20240146806Abstract: An intermediate device 10A includes a transfer unit 11 that transfers a request including data to be transmitted from a local 30 to a remote 50, and a generation unit 12 that generates a pseudo-response to the request and returns the pseudo-response to the local 30. The intermediate device 10B includes a discard unit 13 that discards a response to the request from the remote 50. An intermediate device 20B includes a generation unit 22 that generates a pseudo-request based on an initial request for requesting data transmission from the local 30 to the remote 50 and transmits the pseudo-request to the remote 50, and a transfer unit 24 that transfers a response including data to be transmitted from the remote 50 to the local 30. The intermediate device 20A includes the discard unit 21 that discards a subsequent request from the local 30.Type: ApplicationFiled: June 10, 2021Publication date: May 2, 2024Inventors: Junki ICHIKAWA, Hideki NISHIZAWA, Kenji SHIMIZU, Yukio TSUKISHIMA, Toru MANO, Tomoya HIBI, Kiwami INOUE
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Patent number: 10837514Abstract: A valve structure of a shock absorber includes a piston to which a first communication passage and a second communication passage are provided, and a load application member that applies an initial load to a first leaf valve. The initial load is applied to the first leaf valve within a range between the inside in the radial direction from a first seat part and the outside in the radial direction from an abutting part of the piston, the first seat part being positioned on the outside in the radial direction of the first communication passage.Type: GrantFiled: August 2, 2016Date of Patent: November 17, 2020Assignee: KYB CORPORATIONInventors: Kazuyuki Kimishima, Hideki Yamada, Makoto Arano, Kenji Hibi, Koji Kawamura
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Publication number: 20200088261Abstract: A valve structure of a shock absorber includes a piston to which a first communication passage and a second communication passage are provided, and a load application member that applies an initial load to a first leaf valve. The initial load is applied to the first leaf valve within a range between the inside in the radial direction from a first seat part and the outside in the radial direction from an abutting part of the piston, the first seat part being positioned on the outside in the radial direction of the first communication passage.Type: ApplicationFiled: August 2, 2016Publication date: March 19, 2020Applicant: KYB CorporationInventors: Kazuyuki KIMISHIMA, Hideki YAMADA, Makoto ARANO, Kenji HIBI, Koji KAWAMURA
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Patent number: 8992658Abstract: A sintered metal bearing is obtained by compression-molding of a raw-material powder containing at least a Cu powder, an SUS powder, and a pure Fe powder and thereafter sintering a compression-molded body at a predetermined temperature.Type: GrantFiled: March 2, 2010Date of Patent: March 31, 2015Assignee: NTN CorporationInventors: Fuyuki Ito, Kazuo Okamura, Kenji Hibi
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Patent number: 8876386Abstract: A fluid dynamic bearing device which can exhibit high bearing performance is provided at low costs by forming a highly accurate bearing gap. At least a region in the outer circumferential surface of a shaft which faces the radial bearing gap is constituted of an electroformed part, and the region of the shaft excluding the electroformed part is constituted of a resin portion.Type: GrantFiled: February 16, 2007Date of Patent: November 4, 2014Assignee: NTN CorporationInventors: Kenji Hibi, Kenji Ito, Yasuhiro Yamamoto, Hiroshi Niwa, Isao Komori, Tetsuya Yamamoto
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Patent number: 8562219Abstract: A gap width out of the radial bearing gap is axially differed; a narrow width part which has a relatively smaller gap width in the radial bearing gap is arranged on the side relatively closer to a barycentric position of the rotating body, and a wide width part which has a relatively larger gap width in the radial bearing gap is arranged on a side relatively distant from the barycentric position of the rotating body; and a region facing at least the radial bearing gap of the bearing member is formed to an electroformed part made of deposited metal.Type: GrantFiled: June 8, 2012Date of Patent: October 22, 2013Assignee: NTN CorporationInventors: Masaharu Hori, Masaaki Toda, Kenji Hibi, Tetsuya Yamamoto
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Patent number: 8469596Abstract: Fine particles (6) are retained by an electroformed portion (4) in a dispersed state, and the fine particles (6) exposed from an outer peripheral surface (4a2) of the electroformed portion (4) are molten so as to form micro projections (60) integrated with a resin portion (5). The micro projections (60) enters into fine-particle traces (4c) formed in the electroformed portion (4) to exert an anchor effect, to thereby increase a fixation force between the resin portion (5) and the electroformed portion (4).Type: GrantFiled: September 11, 2008Date of Patent: June 25, 2013Assignee: NTN CorporationInventors: Isao Komori, Yasuhiro Yamamoto, Kenji Hibi
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Patent number: 8419281Abstract: An inner periphery of a molded part having a step from an inner periphery of an electroformed part is molded to a nonconductive coating which covers the surface of a master. When the nonconductive coating is removed, a radial clearance having a diameter greater than that of a bearing clearance is created between the inner periphery of the molded part, which is exposed to the interior, and an outer periphery of a shaft member. A bearing member which forms the bearing and radial clearance with the shaft member is manufactured by performing electroforming on the master with the nonconductive coating formed on part of the surface of the master, thereby forming the electroformed part; then injection molding the bearing member with the electroformed part and the nonconductive coating on the surface of the master inserted into a cavity; and then removing the nonconductive coating from the bearing member.Type: GrantFiled: September 5, 2006Date of Patent: April 16, 2013Assignee: NTN CorporationInventors: Kenji Hibi, Yasuhiro Yamamoto, Tetsuya Yamamoto, Mitsuo Sasabe
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Patent number: 8366322Abstract: A shaft member for a fluid dynamic bearing device that has a recess to cause a dynamic pressure effect of a fluid in a bearing clearance, which is formed on it by rolling, and where a surface layer portion of the recess and a surface layer portion of a surrounding region of the recess has a nitride layer, and where nitrogen is diffused and penetrated in a material of the shaft member that is formed by nitriding after the rolling.Type: GrantFiled: October 25, 2011Date of Patent: February 5, 2013Assignee: NTN CorporationInventors: Kenji Hibi, Yasuhiro Yamamoto
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Publication number: 20120243813Abstract: Provided is a fluid dynamic bearing device which has excellent moment rigidity and an improved working efficiency in assembling and parts control, and in which a bearing sleeve can be easily manufactured. A plurality of bearing sleeves are axially disposed in the fluid dynamic bearing device. The bearing sleeves (3, 4) are formed with different axial lengths from each other.Type: ApplicationFiled: June 8, 2012Publication date: September 27, 2012Applicant: NTN CORPORATIONInventors: Masaharu Hori, Masaaki Toda, Kenji Hibi, Tetsuya Yamamoto
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Patent number: 8215843Abstract: A fluid dynamic bearing device includes a bearing sleeve including a radial bearing surface, a shaft member to be inserted to an inner circumference of the bearing member, and a radial bearing part for non-contact supporting the shaft member in a radial direction by a dynamic pressure action of a fluid generated in a radial bearing gap between the radial bearing surface of the bearing member and an outer circumferential surface of the shaft member. Additionally, a plurality of bearing sleeves are axially arranged, and each bearing sleeve is formed having different axial length with respect to one another.Type: GrantFiled: March 22, 2007Date of Patent: July 10, 2012Assignee: NTN CorporationInventors: Masaharu Hori, Masaaki Toda, Kenji Hibi, Tetsuya Yamamoto
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Publication number: 20120093447Abstract: A shaft member for a fluid dynamic bearing device that has a recess to cause a dynamic pressure effect of a fluid in a bearing clearance, which is formed on it by rolling, and where a surface layer portion of the recess and a surface layer portion of a surrounding region of the recess has a nitride layer, and where nitrogen is diffused and penetrated in a material of the shaft member that is formed by nitriding after the rolling.Type: ApplicationFiled: October 25, 2011Publication date: April 19, 2012Applicant: NTN CORPORATIONInventors: Kenji Hibi, Yasuhiro Yamamoto
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Patent number: 8104963Abstract: Provided is a shaft member for a fluid dynamic bearing device, which is excellent in wear resistance and which can exert a high dynamic pressure effect. A shaft material (11) is rolled to form a recess (7) for causing a dynamic pressure effect of a lubricating oil in a radial bearing clearance (6). In this case, in a surface layer portion (14) of the recess (7) to be formed in an outer peripheral surface (11a) of the shaft material (11), a first hardened layer (14a) is formed by rolling. At the same time, also in a surface layer portion (15) of a surrounding region (8) of the recess (7), a first hardened layer (15a) is formed by rolling at a partial region thereof. After the recess (7) is formed by the rolling, barreling is applied to the shaft material (11). As a result, an outermost surface layer portion of the surface layer portion (15) is formed with a second hardened layer (15b) by the barreling.Type: GrantFiled: December 26, 2006Date of Patent: January 31, 2012Assignee: NTN CorporationInventors: Kenji Hibi, Yasuhiro Yamamoto
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Publication number: 20110317949Abstract: A sintered metal bearing is obtained by compression-molding of a raw-material powder containing at least a Cu powder, an SUS powder, and a pure Fe powder and thereafter sintering a compression-molded body at a predetermined temperature.Type: ApplicationFiled: March 2, 2010Publication date: December 29, 2011Applicant: NTN CORPORATIONInventors: Fuyuki Ito, Kazuo Okamura, Kenji Hibi
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Patent number: 8052328Abstract: A sliding bearing includes a metal part formed by electroforming on an inner periphery of the sliding bearing and an oil feeding mechanism for supplying oil to the bearing gap. As a result, oil retained by the oil feeding mechanism is supplied to the bearing gap, so the lubricity between the bearing and the shaft member is improved by an oil film formed in the bearing gap. This makes it possible to avoid the generation of noise due to defective lubrication and wear of members due to the contact sliding between the bearing and the shaft member.Type: GrantFiled: September 21, 2006Date of Patent: November 8, 2011Assignee: NTN CorporationInventor: Kenji Hibi
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Publication number: 20110216992Abstract: Fine particles (6) are retained by an electroformed portion (4) in a dispersed state, and the fine particles (6) exposed from an outer peripheral surface (4a2) of the electroformed portion (4) are molten so as to form micro projections (60) integrated with a resin portion (5). The micro projections (60) enters into fine-particle traces (4c) formed in the electroformed portion (4) to exert an anchor effect, to thereby increase a fixation force between the resin portion (5) and the electroformed portion (4).Type: ApplicationFiled: September 11, 2008Publication date: September 8, 2011Applicant: NTN CORPORATIONInventors: Isao Komori, Yasuhiro Yamamoto, Kenji Hibi
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Publication number: 20100166343Abstract: Provided is a shaft member for a fluid dynamic bearing device, which is excellent in wear resistance and which can exert a high dynamic pressure effect. A shaft material (11) is rolled to form a recess (7) for causing a dynamic pressure effect of a lubricating oil in a radial bearing clearance (6). In this case, in a surface layer portion (14) of the recess (7) to be formed in an outer peripheral surface (11a) of the shaft material (11), a first hardened layer (14a) is formed by rolling. At the same time, also in a surface layer portion (15) of a surrounding region (8) of the recess (7), a first hardened layer (15a) is formed by rolling at a partial region thereof. After the recess (7) is formed by the rolling, barreling is applied to the shaft material (11). As a result, an outermost surface layer portion of the surface layer portion (15) is formed with a second hardened layer (15b) by the barreling.Type: ApplicationFiled: December 26, 2006Publication date: July 1, 2010Applicant: NTN CORPORATIONInventors: Kenji Hibi, Yasuhiro Yamamoto
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Publication number: 20090285514Abstract: Provided is a fluid dynamic bearing device which has excellent moment rigidity and an improved working efficiency in assembling and parts control, and in which a bearing sleeve can be easily manufactured. A plurality of bearing sleeves are axially disposed in the fluid dynamic bearing device. The bearing sleeves (3, 4) are formed with different axial lengths from each other.Type: ApplicationFiled: March 22, 2007Publication date: November 19, 2009Applicant: NTN CORPORATIONInventors: Masaharu Hori, Masaaki Toda, Kenji Hibi, Tetsuya Yamamoto
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Publication number: 20090148084Abstract: A fluid dynamic bearing device equipped with a shaft member of high strength and capable of maintaining high bearing performance is provided at low cost. A shaft blank (23) has, as an integrated unit, a shaft part (23a) formed of a material of a higher strength than resin, and a protruding part (23b) protruding radially outwards from the shaft part (23a). A shaft member (2) is equipped with the shaft blank (23) and a resin portion (24) covering at least one end surface of the protruding part (23b) of the shaft blank (23) and facing a thrust bearing gap.Type: ApplicationFiled: June 2, 2006Publication date: June 11, 2009Inventors: Isao Komori, Kenji Hibi, Yasuhiro Yamamoto
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Publication number: 20090110339Abstract: A sliding bearing according to the present invention includes a metal part formed by electroforming on an inner periphery of the sliding bearing and an oil feeding mechanism for supplying oil to the bearing gap. As a result, oil retained by the oil feeding mechanism is supplied to the bearing gap, so the lubricity between the bearing and the shaft member is improved by an oil film formed in the bearing gap, making it possible to avoid generation of noise due to defective lubrication and wear of members due to the contact sliding between the bearing and the shaft member.Type: ApplicationFiled: September 21, 2006Publication date: April 30, 2009Inventors: Kenji Hibi, Yasuhiro Yamamoto, Kenji Ito