Patent ID: 6783129
Filing Date: 2004-08-31
Classification: E02F,F16C,F16J

Abstract:
A seal device for a bearing system having a tubular bush member fixedly fitted in a boss member and having a shaft relatively rotatably passed through said bush member, said seal device comprising:a first seal ring having a tubular body fitted on the outer periphery of said shaft and having a seal surface provided on an end face at one axial end of said tubular body and a lip portion provided at the other axial end for sliding contact with an end face of said bush member; and a second seal ring fixedly fitted in said boss member radially on the outer side of said first seal ring and having a tubular body fitted in the inner periphery of said boss member and a sliding surface provided at one axial end of said tubular body for sliding contact with said seal surface, wherein said first seal ring is constituted by a lip seal having a tubular body portion provided at one axial end thereof and fitted on the outer periphery of said shaft, and said lip portion provided at the other axial end and extended toward said end face of said bush member, and a slide member located on the side of said one axial end of said tubular body portion of said lip seal and provided with said seal surface on an end face at one axial end thereof for sliding contact with said second seal ring.