公开(公告)号：US20180209546A1

公开(公告)日：2018-07-26

申请号：US15928478

申请日：2018-03-22

申请人： NOK CORPORATION

发明人： Hideaki NAGAHAMAYA ,  Kokichi HAMAMOTO ,  Masayuki TANIDA ,  Takehiro NAKAGAWA

IPC分类号： F16J15/3232 ,  F16J15/3236

CPC分类号： F16J15/3232 ,  F16J15/3204 ,  F16J15/3212 ,  F16J15/3236

摘要： A sealing device includes an annular reinforcing ring and an elastic body part, and the elastic body part has an annular seal lip, an annular dust lip, and an annular side lip. The side lip extends toward the outer side on an outer periphery side of the dust lip, and includes a distal end portion, a middle portion, and a root portion. The root portion is an annular portion, the middle portion is a portion that is outside of the root portion, and an annular portion that increases in diameter toward an outward side, and the distal end portion is a portion that is outside the middle portion, and an annular portion that increases in diameter toward an outward side. The distal end portion is bent to an inner periphery side from the middle portion.

公开(公告)号：US20170122438A1

公开(公告)日：2017-05-04

申请号：US15311926

申请日：2015-05-15

申请人： NOK CORPORATION

发明人： Kokichi HAMAMOTO ,  Takehiro NAKAGAWA ,  Hideaki NAGAHAMAYA ,  Shiho SATO

IPC分类号： F16J15/3232

CPC分类号： F16J15/3232 ,  F16J15/32 ,  F16J15/322 ,  F16J15/3224 ,  F16J15/3244 ,  F16J15/3252 ,  F16J15/3276

摘要： A sealing device capable of preventing turnover of a dust lip and damage to a dust lip caused by insertion of a shaft. A bumper portion (125) made of a rubber-like elastic body and reducing an impact that the dust lip (122) receives from the shaft when the shaft is inserted into the sealing device (100) is provided on the side opposite to the sealed area (O) with respect to the dust lip (122), and an inner diameter of a tip of the bumper portion (125) on an inner peripheral side is set to be larger than an outer diameter of a part of the shaft on which a main lip (121) and the dust lip (122) slide and to be smaller than an inner diameter of a part having the largest inner diameter in a portion connecting the main lip (121) and the dust lip (122).

公开(公告)号：US20240026977A1

公开(公告)日：2024-01-25

申请号：US18026286

申请日：2021-07-29

申请人： NOK CORPORATION

发明人： Hiroka YAMAGUCHI ,  Kokichi HAMAMOTO ,  Hideaki NAGAHAMAYA ,  Yuki SATO ,  Kenya YOSHIOKA

IPC分类号： F16J15/3244

CPC分类号： F16J15/3244 ,  F16J15/3212

摘要： A sealing device includes a seal lip slidably contacting an outer surface of an inside member and seals liquid in an internal space of an outside member. The seal lip has a liquid-side inclined surface, an atmosphere-side inclined surface, and a lip edge between the liquid-side and atmosphere-side inclined surfaces and extending circumferentially. Helical ribs contacting the outer surface of the inside member are on the atmosphere-side inclined surface, and incline relative to the lip edge. Each rib has a linear portion having parallel side walls and a ship-bottom-shaped portion curving to expand further than the side walls, the linear portion extends from the lip edge, and the ship-bottom-shaped portion is farther from the lip edge than the linear portion. A height of each linear portion relative to the atmosphere-side inclined surface is 5 μm to 37 μm.