| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the number of parts and maintain sealing performance by simplifying a sealing structure especially at an impeller installing side in a water pump bearing for an impeller revolution installed in a vehicle, etc. <P>SOLUTION: There are comprised of a first seal substance A<SB>1</SB>having a main lip 2 and sub lip 3, a second seal substance A<SB>2</SB>having a second main lip 5, a shaft B contacted with the main lip 2, the sub lip 3 and the second main lip 5, and an outer ring 12 surrounding the shaft B via revolving bodies 13, 13,.... The first seal substance A<SB>1</SB>is secured to the outer ring 12, and the second seal substance A<SB>2</SB>is installed in an inner perimeter of a boss hole 20a of a housing body 20 where the outer ring 12 is installed so as to bring the main lip 2 in contact with the second main lip 5. <P>COPYRIGHT: (C)2003,JPO |
