Seal for a joint or juncture – Seal between relatively movable parts – Piston ring or piston ring expander or seat therefor
Reexamination Certificate
2007-01-02
2007-01-02
Patel, Vishal (Department: 3673)
Seal for a joint or juncture
Seal between relatively movable parts
Piston ring or piston ring expander or seat therefor
C277S549000, C277S552000
Reexamination Certificate
active
10606766
ABSTRACT:
A sealing device comprises a sealing member brought into contact with a contact surface so as to be slidable in a predetermined sliding direction. The sealing member comprises a sliding contact portion containing a high polymer material to be brought into sliding contact with the contact surface. A plurality of recessed or protruding streaks, which are independent of one another, are provided side by side so as to constitute a column on a surface of the sliding contact portion.
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Koyo Seiko Co. Ltd.
Patel Vishal
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