Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Reexamination Certificate
2006-08-15
2006-08-15
Patel, Vishal (Department: 3679)
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
C277S551000, C277S555000, C277S913000
Reexamination Certificate
active
07090222
ABSTRACT:
Herein disclosed is a shaft sealing apparatus which comprises a vacuum casing formed with a vacuum chamber, a driving shaft having an outer cylindrical surface and movably extending in the vacuum chamber of the vacuum casing, and a sealing ring in the form of an annular ring shape and including a sealing lip held in contact with the outer cylindrical surface of the driving shaft, an annular spring member operative to impart a force to the sealing lip to ensure that the sealing lip is held in tight contact with the outer cylindrical surface of the driving shaft, and a peripheral portion radially outwardly extending from the sealing lip, in which the outer cylindrical surface of the driving shaft is smaller in surface roughness Ra than 0.1 (μm).
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Mori Hiroki
Okuno Chohei
Watanabe Tetsuya
Aitken Andrew C.
Patel Vishal
Teijin Seiki Co. Ltd.
Venable LLP
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