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21. 发明授权

US11459442B2 Ethylene acrylate rubber composition and molded article thereof 有权
公开(公告)号：US11459442B2
公开(公告)日：2022-10-04
申请号：US16759483
申请日：2018-10-17
申请人： NOK CORPORATION
发明人： Keita Otani
IPC分类号： C08K3/04 , C08K3/36 , C08K5/12 , C08K13/02 , C09K3/10
摘要： The present disclosure provides an ethylene acrylate rubber composition which has all of oil resistance, heat resistance and hydrolysis resistance with good balance after molding and cross-linking, and a molded article formed of a cross-linked substance of the ethylene acrylate rubber composition. The ethylene acrylate rubber composition contains 100 parts by mass of an ethylene acrylate rubber, 10 to 50 parts by mass of a plasticizer with an SP value of 7 or more and 0.05 to 30 parts by mass of a cross-linking agent selected from polyvalent aliphatic primary amine or derivatives thereof. The content of a plasticizer with an SP value of less than 7 in the ethylene acrylate rubber is less than 0.1 parts by mass. Further, a molded article formed of a cross-linked product of the ethylene acrylate rubber composition is provided.

22. 发明申请

US20220307601A1 VALVE STEM SEAL 有权
公开(公告)号：US20220307601A1
公开(公告)日：2022-09-29
申请号：US17594955
申请日：2020-04-27
申请人： NOK CORPORATION
发明人： Kazuhisa HIRAYAMA
IPC分类号： F16J15/3204 , F16J15/3252 , F16K41/04
摘要： A valve stem seal is provided that can effectively prevent detachment from a valve guide. The valve stem seal comprises a metal ring provided with a tubular portion attached to an outer circumferential surface of an end portion of a valve guide, and a lip member provided with a sealing lip that is supported on the metal ring so as to be in tight contact with a valve stem passing through the valve guide, a cutout being provided in the tubular portion, and a tongue-shaped engaging piece being provided inside the cutout, the engaging piece protruding towards an engaging recess provided on the outer circumferential surface of the valve guide and engaging with the engaging recess in a detachment direction of the metal ring from the valve guide, wherein the engaging piece is formed so as to bend towards a radially inner side of the tubular portion at an area extending from a starting end of the engaging piece by a first length in the detachment direction, the first length being longer than a length, in an axial direction of the tubular portion, from the bent area to a tip of the engaging piece.

23. 发明授权

US11448320B2 Sealing device 有权
公开(公告)号：US11448320B2
公开(公告)日：2022-09-20
申请号：US16959777
申请日：2019-04-03
申请人： NOK CORPORATION
发明人： Masahiro Seki
IPC分类号： F16J15/3204 , F16C33/78
摘要： A sealing device is located between an inner member and an outer member that rotate relative to each other. The sealing device includes a tubular part that is to be mounted on a cylindrical end portion of the outer member, an annular part connected to an end of the tubular part and having a portion located radially inside the end portion of the outer member, at least one lip extending from the annular part toward the inner member. Each of the annular part and the tubular part includes an elastic part and a rigid part. At least one of an upper surface of the annular part that is opposite to the tubular part and a lower surface of the tubular part that is opposite to the annular part is formed of the elastic part. Multiple protrusions are formed on at least one of the upper surface of the annular part and the lower surface of the tubular part, the protrusions protruding along an axial direction of the sealing device. The multiple protrusions are arranged on a circle centered on the central axis and spaced apart from each other.

24. 发明授权

US11433582B2 Mold for molding base material integrated gasket 有权
公开(公告)号：US11433582B2
公开(公告)日：2022-09-06
申请号：US17043946
申请日：2019-11-22
申请人： NOK CORPORATION
发明人： Hajime Yui , Kenichi Oba
IPC分类号： B29C45/14 , B29L31/34
摘要： A base-material/gasket unit mold which can reduce molding failure occurrence is provided. The mold includes a first half mold including a base material holding portion arranged on a first parting surface to hold a base material, and a second half mold having a second parting surface and used together with the first half mold to close and open the mold. The second half mold includes a gasket cavity defined on the second parting surface side to form a gasket main body on a surface of the base material, an isolated rubber cavity forming an isolated rubber portion isolated from the gasket main body on the surface of the base material, and a mold-pressing portion arranged around the isolated rubber cavity to press the base material when the mold is closed and having a recessed part defined on a press surface side to reduce deformation of the base material.

25. 发明授权

US11431003B2 Separator assembly used for fuel cell 有权
公开(公告)号：US11431003B2
公开(公告)日：2022-08-30
申请号：US17130135
申请日：2020-12-22
申请人： NOK CORPORATION , Honda Motor Co., Ltd.
发明人： Kento Suzuki , Kentaro Ishida , Kazuo Nunokawa , Akihito Giga
IPC分类号： H01M8/0276 , H01M8/0206 , H01M8/0258
摘要： A separator assembly used for a fuel cell includes one pair of metal separators joined together and including a bead seal section including one pair of seal bead portions projecting in opposite directions respectively, an elastic body disposed in the bead seal section, and a first communication hole which extends through the separator assembly in a thickness direction of the separator assembly and which allows a reaction gas or a coolant to flow through the separator assembly. The bead seal section is disposed along an outer periphery of the separator assembly and along a shape of the first communication hole. The elastic body of a predetermined length is disposed in the bead seal section.

26. 发明申请

US20220260524A1 PARTICLE ANALYSIS DEVICE 有权
公开(公告)号：US20220260524A1
公开(公告)日：2022-08-18
申请号：US17630675
申请日：2020-05-14
申请人： NOK CORPORATION
发明人： Yuki MUROTA , Takumi YOSHITOMI , Naohiro FUJISAWA
IPC分类号： G01N27/447
摘要： A particle analysis device includes an upper liquid space in which a first liquid is stored, a lower liquid space in which a second liquid is stored, a connection pore connecting the upper liquid space to the lower liquid space, and first to fourth holes. Each of the first to fourth holes has an opening that opens at a top surface of the particle analysis device. The first and second holes extend to the upper liquid space. The third and fourth holes extend to the lower liquid space. A first electrode applies an electric potential to the first liquid in the upper liquid space through the first hole, and a second electrode applies an electric potential to the second liquid in the lower liquid space through the third hole. The opening of at least one of the first hole and the second hole has an area that is greater than the rest of the hole. The opening of at least one of the third hole and the fourth hole has an area that is greater than the rest of the hole.

27. 发明申请

US20220243822A1 SEALING DEVICE 有权
公开(公告)号：US20220243822A1
公开(公告)日：2022-08-04
申请号：US17619430
申请日：2020-08-26
申请人： NOK CORPORATION
发明人： Yuto MANAKA
IPC分类号： F16J15/3204
摘要： To suppress a decrease in the tightening force of a seal lip with respect to a shaft regardless of the rigidity of a protrusion. An elastic portion of a sealing device includes an annular seal lip, and the seal lip includes a lip tip end portion and an interior side dust lip. The lip tip end portion is an annular portion protruding to the inner periphery side and formed to contact an output shaft of a reduction gear in the usage state. The interior side dust lip is an annular protrusion provided closer to a sealing target side than is the lip tip end portion. The interior side dust lip protrudes toward the axis x and is formed to contact the output shaft in the usage state. The seal lip also includes a dent portion, which forms a dent, on the outer periphery side of a base of the interior side dust lip.

28. 发明授权

US11384839B2 Sealing device 有权
公开(公告)号：US11384839B2
公开(公告)日：2022-07-12
申请号：US15680205
申请日：2017-08-18
申请人： NOK CORPORATION
发明人： Yuki Sato
IPC分类号： F16J15/3212 , F16J15/3216 , F16J15/3204 , F16J15/3252
摘要： A sealing apparatus 1 is provided with a reinforcing ring 10 that is a member that is annular around an axis x, an elastic-body portion 20 that is formed from an elastic body that is annular around the axis x, an annular garter spring 30, and a lip-pressing ring 40 that is an annular member. The lip-pressing ring 40 is configured so that a seal lip 21 can be inserted into a space on an inner-periphery side thereof, and a value of an inner diameter thereof is configured to be a size no less than a value of an outer diameter of an annular portion that is at least a portion on an outer-periphery side of the seal lip 21. The sealing apparatus can suppress a decrease in tracking a rotary shaft.

29. 发明授权

US11380909B2 Method of manufacturing separator 有权
公开(公告)号：US11380909B2
公开(公告)日：2022-07-05
申请号：US17128547
申请日：2020-12-21
申请人： NOK CORPORATION , Honda Motor Co., Ltd.
发明人： Yohei Sano , Shigeru Watanabe , Akihito Giga , Suguru Ohmori
IPC分类号： H01M8/0228 , H01M8/10 , H01M8/0276 , H01M8/0206
摘要： A method includes a forming step of forming a first metal separator and a second metal separator each including a protruding sealing bead portion and a protruding stopper bead portion; a joining step of joining surfaces of the first metal separator and the second metal separator on sides opposite to sides on which their respective sealing bead portions protrude, and attaching seal members in an extension direction or on distal ends of the sealing bead portion; and a preload applying step of applying preload to a bead seal section formed of one pair of the sealing bead portions and the seal members and a stopper section formed of one pair of the stopper bead portions in a height direction thereof, thereby plastically deforming the bead seal section and the stopper section simultaneously.

30. 发明申请

US20220205537A1 SEALING DEVICE 有权
公开(公告)号：US20220205537A1
公开(公告)日：2022-06-30
申请号：US17606494
申请日：2020-04-24
申请人： NOK CORPORATION
发明人： Hitoshi OKABE , Toru ARAKI
IPC分类号： F16J15/3204
摘要： A sealing device is disposed within a circumferential groove of an inner member that reciprocates relative to an outer member. An inner seal ring of the sealing device is made of a resin and includes an outer peripheral surface having a circumferential groove. An outer seal ring of the sealing device has a high elasticity and is fitted into the circumferential groove of the inner seal ring. The outer seal ring is brought into slidable contact with the inner peripheral surface of the hole of the outer member. A back ring of the sealing device has a high elasticity, is disposed radially inside the inner seal ring, and is compressed between the inner peripheral surface of the inner seal ring and the bottom wall surface of the circumferential groove of the inner member. Inclined surfaces are formed at both ends of the outer peripheral surface of the inner seal ring in the axial direction of the inner seal ring, each of the inclined surfaces having a diameter that decreases as a distance from a center of the outer peripheral surface of the inner seal ring in the axial direction increases. Protruding annular portions are formed at both ends of the inner peripheral surface of the inner seal ring in the axial direction, the protruding annular portions protruding radially inward to restrict movement of the back ring in the axial direction.

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