Emission gas recycling equipment having butterfly valve

Details Emission gas recycling equipment having butterfly valve Emission gas recycling equipment having butterfly valve

2007-01-30

2007-01-30

Jacyna, J. Casimer (Department: 3754)

Valves and valve actuation

Rotary valves

Butterfly

Reexamination Certificate

active

11059504

ABSTRACT:
Emission gas recycling equipment includes a passage for recycling a part of an emission gas and a control valve for controlling an amount of the part of the emission gas. The control valve includes: a housing having a pipe portion; a butterfly valve accommodated in the pipe portion rotatable in a first direction and a second direction; a seal ring for sealing a clearance; and valve open/close operation means for stopping the butterfly valve at the valve full close position after the valve open/close operation means operates the butterfly valve to open and to close equal to or more than one cycle across the valve full close position at the time when the engine stops or after the engine stops.

REFERENCES:
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patent: 5146887 (1992-09-01), Gluchowski et al.
patent: 5465756 (1995-11-01), Royalty et al.
patent: 5531205 (1996-07-01), Cook et al.
patent: 6364287 (2002-04-01), Rauch et al.
patent: 6367773 (2002-04-01), Ito
patent: 6932051 (2005-08-01), Soshino et al.
patent: 1 420 158 (2004-05-01), None
patent: 1 426 589 (2004-06-01), None
patent: 2001-173464 (2001-06-01), None
patent: 2003-314377 (2003-11-01), None
Korean Office Action dated Aug. 31, 2006 issued in counterpart Korean Application No. 10-2005-0013333 with English translation.

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