| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sealing device capable of reducing torque and preventing foreign matter from entering from the outside due to pressure difference. <P>SOLUTION: First portions 205, 225 are fixed to an outer ring 201, and second portions 206, 226 are fixed to an inner ring 202. Bimetal members 235, 245 and electromagnets 230, 240 are embedded and in elastic portions of the first portions 205, 225, and parts of the second portions 206, 226 are constituted of ferromagnetic members 230, 240. At a normal temperature region, the first portions 205, 225 and the second portions 206, 226 are brought into contact with each other, based on deformation of the bimetal members 235, 245 at a temperature equal to or higher than a predetermined temperature equal to or higher than the normal temperature region, the first portions 205, 225 and the second portions 206, 226 are made to be disposed to be spaced apart from each other at a temperature equal to or higher than the predetermined temperature equal to or higher than the normal temperature region. <P>COPYRIGHT: (C)2009,JPO&INPIT |
