Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Reexamination Certificate
2005-10-28
2010-06-29
Will, Thomas B (Department: 3676)
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
C277S408000, C277S400000
Reexamination Certificate
active
07744094
ABSTRACT:
A mechanical seal device includes a rotational seal ring connected to a rotational shaft, having a rotational seal surface and arc-shaped grooves arranged on the rotational seal surface. The grooves are sectionalized by partition walls. A stationary seal ring has a stationary seal surface facing the rotational seal surface of the rotational seal ring. A spring biases the stationary seal ring against the rotational seal ring. Outlet portions are formed on the stationary seal surface of the stationary seal ring and connect with a fluid supply path for supplying a pressure fluid. A circumferential direction length (W3) of each outlet portion is made to be ½ of a circumferential direction length (W1) of each partition wall or longer (W3≧W1/2); and a circumferential direction length (W3) of the outlet portions is made to be shorter than a circumferential direction length (W2) of the arc-shaped grooves (W3<W2).
REFERENCES:
patent: 3527465 (1970-09-01), Guinard
patent: 3917289 (1975-11-01), Ivanov et al.
patent: 4961678 (1990-10-01), Janocko
patent: 6076830 (2000-06-01), Wu et al.
patent: 7377518 (2008-05-01), Lai
patent: 2002/0079648 (2002-06-01), Uth
patent: 2 341 431 (1973-08-01), None
patent: 2 212 017 (1974-07-01), None
patent: 1 416 487 (1975-12-01), None
patent: 49-98666 (1974-12-01), None
patent: 50-45155 (1975-04-01), None
patent: 02275182 (1990-11-01), None
patent: 04000073 (1992-01-01), None
patent: 08-303606 (1996-11-01), None
patent: 400 821 (1973-11-01), None
Akiyama Koji
Ito Masanobu
Uchiyama Mami
Yanagisawa Takashi
Arent & Fox LLP
Eagle Industry Co. Ltd.
Lee Gilbert Y
Will Thomas B
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