US 12,467,504 B2
Sealing device
Shiori Arakawa, Okayama (JP)
Assigned to UCHIYAMA MANUFACTURING CORP., Okayama (JP)
Filed by UCHIYAMA MANUFACTURING CORP., Okayama (JP)
Filed on Mar. 28, 2024, as Appl. No. 18/620,050.
Claims priority of application No. 2023-052951 (JP), filed on Mar. 29, 2023.
Prior Publication US 2024/0328460 A1, Oct. 3, 2024
Int. Cl. F16C 33/80 (2006.01); B60B 27/00 (2006.01); F16C 33/78 (2006.01)
CPC F16C 33/805 (2013.01) [B60B 27/0073 (2013.01); F16C 33/7883 (2013.01); F16C 2326/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A sealing device comprising a first member and a second member, one of the first member and the second member being fitted to a fixed member of a bearing device, an other of the first member and the second member being fitted to a rotary member of the bearing device, the sealing device being provided in a sealed space between the fixed member and the rotary member of the bearing device,
wherein the first member comprises a first cylindrical portion to be fitted to the bearing device, and an end portion of the first cylindrical portion on an open side is arranged so as to face an outer side in the sealed space,
wherein the second member comprises a second cylindrical portion to be fitted to the bearing device, a disk portion continuously provided at the second cylindrical portion, and an intermediate cylindrical portion continuously provided at the disk portion; and an end portion of the intermediate cylinder portion on an open side is arranged so as to face an inner side in the sealed space,
wherein a communication path in a repeatedly bent shape communicating with the outer side is formed between the first cylindrical portion and the intermediate cylindrical portion when the sealing device is mounted in the sealed space, and
wherein one of surfaces facing each other across the communication path is in a shape of a staircase in which steps are continuously provided so as to slope downward to the end portion of the intermediate cylindrical portion on an open side, and an other surface comprises a plurality of protruding portions protruding so as to approach the one of surfaces.