Patent ID: 7959158
Filing Date: 2011-06-14
Classification: F16J

Abstract:
1. A shaft seal device for sealing a sealed fluid between a bore surface of a housing member and a rotary shaft disposed within the bore surface, said shaft seal device comprising: a seal portion comprising a close-fit engagement portion and a first seal lip; said close-fit engagement portion having a fit engagement surface; said fit engagement surface being capable of having a tight-fit engagement with said bore surface of said housing member; said first seal lip being made of a rubber resilient material and extending radially inward from said close-fit engagement portion and having a seal face; said seal face sealing the sealed fluid in an inner circumference of said close-fit engagement portion; and a seal sleeve comprising a slide seal face, a rotary wing, and a tight-fit engagement surface; said slide seal face being slidably in a seal-tight contact with said seal face of said first seal lip; said rotary wing being formed from an axial end portion of said slide seal face, fixed on said rotary shaft and covering a seal face region; said seal sleeve being made of a metal or resin material; wherein said rotary wing comprises a discharge port formed as a fin on said rotary wing and extending away from said seal face region, and disposed intermediate free ends of said rotary wing, wherein said discharge port pushes back said sealed fluid from said seal face region, and a gap is formed between a support ring or an outer ring supporting said seal lip and said rotary wing.