US 2022/0178448 A1Published application

Sealing device

AssigneeNok Corporation

InventorKenichi KIKUCHI

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Abstract

A sealing device includes a reinforcement ring and an annular elastic body portion including a main body covering the reinforcement ring, a lip waist portion including an inner circumferential edge portion of the main body, a main lip extending from the lip waist portion to a first target side to be sealed and is to be in slidable contact with a rotary shaft, and a second dust lip extending from the lip waist portion to a second target side opposite to the first target side relative to the sealing device and being provided relative to the main lip with an annular space between the second dust lip and the main lip. The second dust lip includes a first lip slide portion being to be in slidable contact with the rotary shaft, a first protrusion formed on an inner circumferential surface of the second dust lip and closer to the first lip slide portion, and a second protrusion formed on the inner circumferential surface and closer to the lip waist portion than the first protrusion.

Claims4

Dependent claims

A sealing device configured to seal an annular gap between two members coupled concentrically and rotatably relative to each other, the sealing device comprising:

a reinforcement ring;
and
an annular elastic body portion comprising:
(a) a main body covering the reinforcement ring;
(b) a lip waist portion comprising an inner circumferential edge portion of the main body;
(c) a main lip extending from the lip waist portion to a first target side to be sealed and is to be in slidable contact with one of the two members;
and
(d) at least one dust lip extending from the lip waist portion to a second target side opposite to the first target side relative to the sealing device and being provided relative to the main lip with an annular space between the at least one dust lip and the main lip, the at least one dust lip comprising:
(i) a first lip slide portion being to be in slidable contact with the one of the two members;
(ii) a first protrusion formed on an inner circumferential surface of the at least one dust lip and closer to the first lip slide portion;
and
(iii) a second protrusion formed on the inner circumferential surface and closer to the lip waist portion than the first protrusion.

9 more elements

Dependencies are inferred from the claim text.