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：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：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：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：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.