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：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.

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：US20210215250A1

公开(公告)日：2021-07-15

申请号：US17059152

申请日：2019-07-02

Applicant: NOK CORPORATION

Inventor： Takumi YAMADA ,  Hiromi SUGIHARA ,  Hisato YONAI ,  Toshiki WATANABE ,  Satoshi YAMANAKA ,  Yu YAMAGUCHI

IPC: F16J15/18 ,  F16J15/3232 ,  F16J15/324

Abstract: A sealing device includes a reinforcing ring having annular shape around an axis line and an elastic body part formed from an elastic body, the elastic body part being attached to the reinforcing ring and having an annular shape around the axis line. The elastic body part includes an annular seal lip and an annular side lip that is provided on an outer side of the seal lip and that extends toward the outer side. In an inner peripheral surface of the side lip on an inner periphery side, at least one circumferential groove which is a groove having an annular shape around the axis line is provided and at least one axial groove which is a groove extending along a direction of the axis line is provided. The circumferential groove and the axial groove are connected with each other.