公开(公告)号：US20180038485A1

公开(公告)日：2018-02-08

申请号：US15724306

申请日：2017-10-04

Applicant: NOK CORPORATION

Inventor： Satoshi YAMANAKA ,  Norimasa HOSONUMA ,  Maiko KAWAMOTO ,  Fangman XU

IPC: F16J15/3204 ,  F16J15/3244

CPC classification number: F16J15/3204 ,  F16J15/164 ,  F16J15/32 ,  F16J15/3244 ,  F16J15/3256 ,  F16J15/3264 ,  F16J15/3456

Abstract: A sealing device provides sealing so as to prevent a sealed fluid in a machine inner side from leaking to a machine outer side between a housing and a rotating shaft which is inserted to a shaft hole provided in the housing. The sealing device has a seal flange which is installed to an outer periphery of the rotating shaft, and a seal lip which is installed to an inner periphery of the shaft hole of the housing and slidably comes into contact with the seal flange over an entire periphery. The sealing device includes a thread groove which exerts a fluid pumping action when the rotating shaft rotates. The thread groove is provided at a position which does not intersect a contact area where the seal lip slidably comes into contact with the seal flange over the entire periphery, thereby suppressing generation of static leakage.

公开(公告)号：US20160010603A1

公开(公告)日：2016-01-14

申请号：US14772002

申请日：2014-02-28

Applicant: NOK CORPORATION

Inventor： Shuji YOSHITSUNE ,  Shigeru WATANABE ,  Masahiko INOUE ,  Norimasa HOSONUMA

IPC: F02M35/12

CPC classification number: F02M35/1216 ,  F02D9/104 ,  F02M35/10006 ,  F02M35/1211

Abstract: Provided is an intake noise reduction device that can suppress an occurrence of noise in an intake pipe. An intake noise reduction device (100) disposed on a downstream side of a throttle valve in an intake pipe and including a flow-guiding net (110) that guides an air flow, wherein the flow-guiding net includes a mesh that is configured to be fine in a vicinity of a center of a flow passage in the intake pipe and to become coarser with distance from the vicinity of the center. For example, the mesh flow-guiding net (110) is formed of a plurality of radial portions (111) extending radially outward from the vicinity of the center of the flow passage in the intake pipe and a plurality of concentric portions (112) provided concentrically from the vicinity of the center.

Abstract translation: 提供一种能够抑制进气管中的噪音的发生的进气噪声降低装置。 一种进气噪声降低装置（100），其设置在进气管中的节流阀的下游侧，并且包括引导空气流的导流网（110），其中，所述导流网包括网状物，所述网状结构 在进气管中的流路的中心附近很细，并且随着距离中心附近的距离变粗。 例如，网状引流网（110）由从进气管的流路的中心附近径向向外延伸的多个径向部（111）形成，并且设有多个同心部（112） 同心地从中心附近。

公开(公告)号：US20240142890A1

公开(公告)日：2024-05-02

申请号：US18273185

申请日：2021-12-03

Applicant: NOK CORPORATION

Inventor： Kosuke OURA ,  Norimasa HOSONUMA ,  Atsushi IKEDA ,  Yu AKAI ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/08

CPC classification number: G03G15/0808 ,  G03G15/0881

Abstract: A developing roll for use in an image-forming apparatus using electrophotography includes a cylindrical core made of metal; an annular elastic layer made of rubber and arranged around the core; and an annular surface layer arranged around the elastic layer. The surface layer includes a central portion and end portions. The central portion is located at the center of the developing roll in the longitudinal direction, the end portions are located at opposite end portions of the developing roll in the longitudinal direction. A coefficient of kinetic friction of the outer peripheral surface of each end portion of the surface layer is less than or equal to 0.1, and a ten-point average roughness Rz of the outer peripheral surface of each end portion of the surface layer is less than or equal to 1.8 μm.

公开(公告)号：US20180306325A1

公开(公告)日：2018-10-25

申请号：US15767574

申请日：2016-10-11

Applicant: NOK CORPORATION

Inventor： Norimasa HOSONUMA ,  Fangman XU ,  Kenichi NAKAYAMA

IPC: F16J15/18

CPC classification number: F16J15/186 ,  F16J15/18

Abstract: A seal ring exhibits a sealing function even when fluid pressure is low. A first elastic body sealing portion 200X is provided between a first front end surface 111Xa of a first fitting projection 111X and a first opposing surface 112Ya so as to oppose the first front end surface 111Xa, whereby the first elastic body sealing portion 200X presses the first front end surface 111Xa and the first opposing surface away from each other in a circumferential direction, and a second elastic body sealing portion 200Y is provided between a second front end surface 111Ya of a second fitting projection 111Y and a second opposing surface 112Xa so as to oppose the second front end surface 111Ya, whereby the second elastic body sealing portion 200Y presses the second front end surface 111Ya and the second opposing surface 112Xa away from each other in the circumferential direction.

公开(公告)号：US20230160473A1

公开(公告)日：2023-05-25

申请号：US17911164

申请日：2021-03-26

Applicant: NOK CORPORATION ,  EAGLE INDUSTRY CO., LTD.

Inventor： Norimasa HOSONUMA ,  Yoshiaki TAKIGAHIRA ,  Takuto FUKUHARA ,  Kosei HASHIMOTO ,  Nozomu SUZUKI

IPC: F16J15/3268 ,  F16J15/3284

CPC classification number: F16J15/3268 ,  F16J15/3284

Abstract: The seal structure includes a shaft member, a bush having a shaft hole for passing the shaft member, a pressure-receiving member having a facing surface facing an end surface of the bush on one side in the direction of the axis, and an elastic member that presses the bush against the pressure-receiving member from another side in the direction of the axis, in which a first coating layer is formed between an outer peripheral surface of the shaft member and an inner peripheral surface of the shaft hole of the bush, and a second coating layer is formed between the end surface of the bush on one side in the direction of the axis and the facing surface of the pressure-receiving member.

公开(公告)号：US20170114901A1

公开(公告)日：2017-04-27

申请号：US15317718

申请日：2015-06-09

Applicant: NOK CORPORATION

Inventor： Satoshi YAMANAKA ,  Norimasa HOSONUMA ,  Maiko KAWAMOTO ,  Fangman XU

IPC: F16J15/3204 ,  F16J15/3244

CPC classification number: F16J15/3204 ,  F16J15/164 ,  F16J15/32 ,  F16J15/3244 ,  F16J15/3256 ,  F16J15/3264 ,  F16J15/3456

Abstract: The invention provides a sealing device sealing so as to prevent a sealed fluid in a machine inner side from leaking to a machine outer side between a housing and a rotating shaft which is inserted to a shaft hole provided in the housing. The sealing device has a seal flange which is installed to an outer periphery of the rotating shaft, and a seal lip which is installed to an inner periphery of the shaft hole of the housing and slidably comes into contact with the seal flange over an entire periphery. The sealing device includes a thread groove which exerts a fluid pumping action when the rotating shaft rotates. The thread groove is provided at a position which does not intersect a contact area where the seal lip slidably comes into contact with the seal flange over the entire periphery, thereby suppressing generation of static leakage.

公开(公告)号：US20200056701A1

公开(公告)日：2020-02-20

申请号：US16662670

申请日：2019-10-24

Applicant: NOK CORPORATION ,  EAGLE INDUSTRY CO., LTD. ,  KYOTO UNIVERSITY

Inventor： Norimasa HOSONUMA ,  Nozomu SUZUKI ,  Takeshi HOSOE ,  Keita SAKAKIBARA ,  Yoshinobu TSUJII

IPC: F16J15/3288 ,  F16J15/10

Abstract: A seal member has a seal surface exhibiting excellent sealing properties and is any one seal member selected from a gasket, a mechanical seal, a segment seal, a brush seal, a squeeze packing, a lip packing, and a seal ring, in which the seal member has a seal surface on which a polymer brush layer is provided.

公开(公告)号：US20180051809A1

公开(公告)日：2018-02-22

申请号：US15557909

申请日：2016-03-10

Applicant: NOK CORPORATION

Inventor： Yusuke YOSHIDA ,  Fangman XU ,  Nozomu SUZUKI ,  Norimasa HOSONUMA ,  Shigenobu HONDA ,  Kenichi YOSHIMURA ,  Yohei SAKAI ,  Shota TOMA

IPC: F16J15/16 ,  F16J15/44 ,  F16J15/3244

CPC classification number: F16J15/164 ,  F16J15/18 ,  F16J15/3244 ,  F16J15/441

Abstract: A seal ring capable of stably reducing a rotational torque while preventing the leakage of sealed fluid. The seal ring includes: an abutment joint part (110) provided at one portion in a circumferential direction thereof; a plurality of dynamic pressure generation grooves (120) provided at intervals in the circumferential direction on a side of a sliding surface thereof sliding on a lateral wall surface of an annular groove; and foreign matter discharging grooves (130) that are provided between a region in which the plurality of dynamic pressure generation grooves (120) is arranged and the abutment joint part (110) in the circumferential direction on the side of the sliding surface sliding on the lateral wall surface, and that are capable of catching foreign matter intruding from the abutment joint part (110) and discharging the caught foreign matter to an outside of a sliding part between the seal ring and the lateral wall surface.

公开(公告)号：US20180045314A1

公开(公告)日：2018-02-15

申请号：US15558228

申请日：2016-03-11

Applicant: NOK CORPORATION

Inventor： Norimasa HOSONUMA ,  Nozomu SUZUKI

IPC: F16J15/16 ,  F16J15/34

CPC classification number: F16J15/164 ,  F16J15/3272 ,  F16J15/3464 ,  F16J15/441

Abstract: A seal ring (100) is attached to an annular groove (210) provided on an outer periphery of a shaft (200), and slides on a lateral wall surface (211) of the annular groove (210) on a lower pressure side. The seal ring (100) includes: a dynamic pressure generation groove (120) that generates dynamic pressure with sealed fluid introduced thereinto, the dynamic pressure generation groove (120) being provided in a sliding region X of a lateral surface (111) thereof on the lower pressure side in which the lateral surface (111) slides on the lateral wall surface (211); and an introduction hole (130) that has an opening (131) at a position away from the lateral surface (111) of an inner peripheral surface (112) of the seal ring (100) by a distance Y, communicates with the dynamic pressure generation groove (120), and introduces the sealed fluid into the dynamic pressure generation groove (120).

公开(公告)号：US20180038486A1

公开(公告)日：2018-02-08

申请号：US15724310

申请日：2017-10-04

Applicant: NOK CORPORATION

Inventor： Satoshi YAMANAKA ,  Norimasa HOSONUMA ,  Maiko KAWAMOTO ,  Fangman XU

IPC: F16J15/3204 ,  F16J15/3244

CPC classification number: F16J15/3204 ,  F16J15/164 ,  F16J15/32 ,  F16J15/3244 ,  F16J15/3256 ,  F16J15/3264 ,  F16J15/3456

Abstract: A sealing device provides sealing so as to prevent a sealed fluid in a machine inner side from leaking to a machine outer side between a housing and a rotating shaft which is inserted to a shaft hole provided in the housing. The sealing device has a seal flange which is installed to an outer periphery of the rotating shaft, and a seal lip which is installed to an inner periphery of the shaft hole of the housing and slidably comes into contact with the seal flange over an entire periphery. The sealing device includes a thread groove which exerts a fluid pumping action when the rotating shaft rotates. The thread groove is provided at a position which does not intersect a contact area where the seal lip slidably comes into contact with the seal flange over the entire periphery, thereby suppressing generation of static leakage.