Patents by Inventor Hiroaki Monma
Hiroaki Monma 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: 10890257Abstract: A sealing device capable of preventing, when a shaft and a housing move relative to each other, the sealing device from moving together with the shaft. A resin seal ring 100 includes a cylindrical section 110, a pair of inner circumference lips 120 respectively provided on both sides of the cylindrical section 110 in the axial direction, a pair of outer circumference lips 130 respectively provided on both sides of the cylindrical section 110 in the axial direction, and an annular mounting groove 111 which is provided on an outer circumference surface of the cylindrical section 110 and in which the elastic seal ring 300 is mounted. The pair of inner circumference lips 120 are configured to slide on an outer circumference surface of the shaft. The pair of outer circumference lips 130 are configured to be in close contact with the inner circumference surface of the shaft hole.Type: GrantFiled: August 9, 2017Date of Patent: January 12, 2021Assignee: NOK CORPORATIONInventor: Hiroaki Monma
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Publication number: 20190178383Abstract: A sealing device capable of preventing, when a shaft and a housing move relative to each other, the sealing device from moving together with the shaft. A resin seal ring 100 includes a cylindrical section 110, a pair of inner circumference lips 120 respectively provided on both sides of the cylindrical section 110 in the axial direction, a pair of outer circumference lips 130 respectively provided on both sides of the cylindrical section 110 in the axial direction, and an annular mounting groove 111 which is provided on an outer circumference surface of the cylindrical section 110 and in which the elastic seal ring 300 is mounted. The pair of inner circumference lips 120 are configured to slide on an outer circumference surface of the shaft. The pair of outer circumference lips 130 are configured to be in close contact with the inner circumference surface of the shaft hole.Type: ApplicationFiled: August 9, 2017Publication date: June 13, 2019Inventor: Hiroaki MONMA
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Patent number: 10107401Abstract: A sealing structure suppresses possible damage to a seal ring because of a backup ring. The sealing structure is characterized in that a cut portion 150 that is cut in a planar shape is formed in a backup ring 100 at one position in a circumferential direction, the cut portion 150 is configured such that a cut surface 153 is oblique to a central axis of the backup ring 100, an acute angle of angles between a surface on the high pressure side of the backup ring 100 and the cut surface 153 is set to not less than 15° and not more than 30°, and the backup ring 100 is formed of a resin material having Rockwell hardness of 100 or less, durometer hardness of 70 or less, and elastic modulus of 1.0 GPa or less.Type: GrantFiled: August 28, 2015Date of Patent: October 23, 2018Assignee: NOK CORPORATIONInventors: Hiroaki Monma, Mitsuo Watanabe, Shuji Yoshitsune, Kota Henmi
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Publication number: 20170292607Abstract: A sealing structure suppresses possible damage to a seal ring because of a backup ring. The sealing structure is characterized in that a cut portion 150 that is cut in a planar shape is formed in a backup ring 100 at one position in a circumferential direction, the cut portion 150 is configured such that a cut surface 153 is oblique to a central axis of the backup ring 100, an acute angle of angles between a surface on the high pressure side of the backup ring 100 and the cut surface 153 is set to not less than 15° and not more than 30°, and the backup ring 100 is formed of a resin material having Rockwell hardness of 100 or less, durometer hardness of 70 or less, and elastic modulus of 1.0 GPa or less.Type: ApplicationFiled: August 28, 2015Publication date: October 12, 2017Applicant: NOK CORPORATIONInventors: Hiroaki MONMA, Mitsuo WATANABE, Shuji YOSHITSUNE, Kota HENMI
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Patent number: 9777839Abstract: An object is to provide a backup ring manufacturable with an angle of a cut portion set to a standard cut angle even in the case of a product having a small diameter etc. due to dimensional limitation of a device used therewith, and is solved by a sealing device characterized in that a backup ring 1 is disposed in an annular gap 4 formed by disposing a sloped surface 20 on a member surface of one of two members, i.e.Type: GrantFiled: November 13, 2014Date of Patent: October 3, 2017Assignee: NOK CorporationInventor: Hiroaki Monma
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Publication number: 20170097094Abstract: An object is to provide a backup ring manufacturable with an angle of a cut portion set to a standard cut angle even in the case of a product having a small diameter etc. due to dimensional limitation of a device used therewith, and is solved by a sealing device characterized in that a backup ring 1 is disposed in an annular gap 4 formed by disposing a sloped surface 20 on a member surface of one of two members, i.e.Type: ApplicationFiled: November 13, 2014Publication date: April 6, 2017Applicant: NOK CorporationInventor: Hiroaki MONMA
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Patent number: 9273655Abstract: A sealing device (100) includes a resinous sealing ring (110) and an elastomeric elastic ring (120) in an annular groove 210. The sealing ring (110) has a cylindrical surface portion (112a) making intimate contact with a groove bottom of the annular groove (210) and an inclined surface portion (112b) expanding in diameter toward the atmosphere side (A). The elastic ring (120) is disposed such that at least its portion is compressed between the inclined surface portion (112b) and the groove bottom of the annular groove (210) so as to press a portion of the sealing ring (110) on the atmosphere side (A) toward the outer peripheral side.Type: GrantFiled: September 24, 2013Date of Patent: March 1, 2016Assignee: NOK CORPORATIONInventors: Hikaru Tadano, Yosuke Kondo, Hiroaki Monma
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Publication number: 20150260290Abstract: In a sealing device sealing between relatively moving two members by being installed to an installation groove in one member and coming into close contact with the other member and a side wall of the installation groove, the sealing device has a seal ring including a diametrical portion in an end portion of a tubular portion, and coming into close contact with a side wall of the installation groove by an end surface of the diametrical portion and the other member by an outer peripheral surface of the tubular portion, a rigid support ring including positions respectively coming into contact with an inner peripheral surface of the tubular portion and the axially other end surface of the diametrical portion, and a spring means pressing the support ring and the seal ring. The support ring serves to support the tubular portion of the seal ring from an inner peripheral side thereof.Type: ApplicationFiled: September 25, 2013Publication date: September 17, 2015Applicant: NOK CORPORATIONInventor: Hiroaki Monma
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Publication number: 20150233331Abstract: A sealing device (100) includes a resinous sealing ring (110) and an elastomeric elastic ring (120) in an annular groove 210. The sealing ring (110) has a cylindrical surface portion (112a) making intimate contact with a groove bottom of the annular groove (210) and an inclined surface portion (112b) expanding in diameter toward the atmosphere side (A). The elastic ring (120) is disposed such that at least its portion is compressed between the inclined surface portion (112b) and the groove bottom of the annular groove (210) so as to press a portion of the sealing ring (110) on the atmosphere side (A) toward the outer peripheral side.Type: ApplicationFiled: September 24, 2013Publication date: August 20, 2015Applicant: NOK CORPORATIONInventors: Hikaru Tadano, Yosuke Kondo, Hiroaki Monma
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Patent number: 9080672Abstract: In a sealing device installed to an installation groove which is provided in an outer peripheral surface of one member among two members relatively moving, and sealing between the two members by coming into close contact with the other member which is positioned in an outer peripheral side of the installation groove and one side wall of the installation groove, the sealing device has a seal ring, a support ring having a pressing surface which comes into contact with an inner peripheral corner portion the seal ring, and a spring means which presses the support ring and the seal ring. A collapsing margin in relation to the taper surface shaped pressing surface in the support ring is normally set in an inner peripheral corner portion in the seal ring. According to the sealing device, it is possible to improve pressure resistance and sealing performance.Type: GrantFiled: September 25, 2013Date of Patent: July 14, 2015Assignee: NOK CorporationInventors: Daisuke Matsumoto, Hiroaki Monma
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Publication number: 20150035237Abstract: A sealing structure which is able to reduce an inserting load, while enhancing a sealing performance is provided. The sealing structure includes an annular groove (211) having a step on its groove bottom, and is provided with a primary annular groove (211a) disposed at one side of the step, and a secondary annular groove (211b) disposed at another side of the step, and a gasket (400) is disposed so as to be filled into the primary annular groove (211a), and a gap (D2) between an injector and a mounting hole at a boundary section between the primary annular groove (211a) and the secondary annular groove (211b) is larger than a minute gap (D1) at an opposite side of the secondary annular groove (211b) intervened by the primary annular groove (211a).Type: ApplicationFiled: November 22, 2012Publication date: February 5, 2015Inventors: Hikaru Tadano, Hiroaki Monma
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Publication number: 20150008648Abstract: In a sealing device installed to an installation groove which is provided in an outer peripheral surface of one member among two members relatively moving, and sealing between the two members by coming into close contact with the other member which is positioned in an outer peripheral side of the installation groove and one side wall of the installation groove, the sealing device has a seal ring, a support ring having a pressing surface which comes into contact with an inner peripheral corner portion the seal ring, and a spring means which presses the support ring and the seal ring. A collapsing margin in relation to the taper surface shaped pressing surface in the support ring is normally set in an inner peripheral corner portion in the seal ring. According to the sealing device, it is possible to improve pressure resistance and sealing performance.Type: ApplicationFiled: September 25, 2013Publication date: January 8, 2015Applicant: NOK CORPORATIONInventors: Daisuke Matsumoto, Hiroaki Monma
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Publication number: 20120308424Abstract: A sealing device is constructed by a seal ring and a back ring, the back ring is constructed by a lip packing provided with an inner lip and an outer lip in one end portion in an axial direction of an annular base portion, and is provided with an annular protrusion for setting a diametrical direction compression margin in the back ring in an outer peripheral surface of the annular base portion. The outer lip has a function of sealing the sealed fluid by coming into close contact with the cylinder and releasing the accumulated pressure by being pushed by a pressure at a time of a pressure accumulating phenomenon in the another space in the axial direction so as to be spaced from the cylinder. The annular protrusion is provided with a flow path for introducing the accumulated pressure to the outer lip.Type: ApplicationFiled: January 13, 2011Publication date: December 6, 2012Applicants: ADVICS CO., LTD., NOK CORPORATIONInventors: Hikaru Tadano, Hiroaki Monma, Nobuhiko Yoshioka, Takahiro Yamaguchi
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Publication number: 20120235361Abstract: [Object] To provide a sealing device, which is capable of keeping a higher sealability even when a fluid pressure is not applied and even just after starting of application of the fluid pressure, and which is capable of reducing a sliding resistance while keeping a sealability during operation where the fluid pressure is always applied thereto.Type: ApplicationFiled: September 22, 2010Publication date: September 20, 2012Inventors: Hikaru Tadano, Hiroaki Monma, Shigeo Sekine