US 12,013,038 B2
Sealing device
Masahiro Seki, Fukushima (JP)
Assigned to NOK CORPORATION, (JP)
Appl. No. 17/925,684
Filed by NOK CORPORATION, Tokyo (JP)
PCT Filed Jun. 2, 2021, PCT No. PCT/JP2021/020973
§ 371(c)(1), (2) Date Nov. 16, 2022,
PCT Pub. No. WO2021/251232, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2020-101994 (JP), filed on Jun. 12, 2020.
Prior Publication US 2023/0193998 A1, Jun. 22, 2023
Int. Cl. F16J 15/3276 (2016.01); F16C 33/78 (2006.01)
CPC F16J 15/3276 (2013.01) [F16C 33/782 (2013.01); F16C 2326/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sealing device disposed between an inner member and an outer member that rotate relative to each other, the sealing device acting to seal a gap between the inner member and the outer member, the sealing device comprising:
a first sealing member having a cylindrical part adapted to be mounted on the outer member, an annular part extending radially inward from the cylindrical part, and a lip extending from the annular part; and
a second sealing member having a cylindrical sleeve adapted such that the inner member is fitted into the sleeve, and a flange extending radially outward from the sleeve and facing the annular part of the first sealing member, the lip of the first sealing member being in slidable contact with the sleeve,
the sleeve of the second sealing member being made of a rigid material
the flange of the second sealing member having a rigid flange portion made of the rigid material and connected to the sleeve, and a circular annular elastic flange portion made of an elastic material that adheres to the rigid flange portion,
an annular protrusion is formed on an inner periphery of the elastic flange portion, the annular protrusion adapted to be in contact with a cylindrical outer peripheral surface of the inner member,
the protrusion having an inner peripheral surface, in an initial state in which the elastic flange portion is not in contact with the outer peripheral surface of the inner member and is not deformed, the inner peripheral surface having a cylindrical portion and two inclined surface portions adjacent to the cylindrical portion, each of the inclined surface portions having a truncated conical shape,
in a state in which the elastic flange portion is in contact with the outer peripheral surface of the inner member and is deformed, the cylindrical portion and the two inclined surface portions are adapted to be in contact with the outer peripheral surface of the inner member and are adapted to be deformed,
the cylindrical portion having an inner diameter that is less than an inner diameter of the sleeve in the initial state,
the cylindrical portion of the protrusion having a length along an axial direction of the sealing device in the initial state, the length being at least 0.15 mm.