Valves and valve actuation – With selective flow regulation – Rotary
Reexamination Certificate
2005-04-19
2005-04-19
Nguyen, Tuan (Department: 3751)
Valves and valve actuation
With selective flow regulation
Rotary
C251S129110, C251S339000, C137S315170
Reexamination Certificate
active
06880802
ABSTRACT:
A valve device having a novel vale seat plate is provided. The valve seat plate has an inlet opening, an outlet opening, a front side and a back side. A sealing case covers the front side and inlet and outlet pipes are attached to the back side to communicate respectively with the inlet and outlet openings. A valve element moves to cover the outlet opening on the front side to close the outlet opening. The novel valve seat plate includes at least two plates that are joined to each other. One plate forms the area around the outlet opening and the other plate forms other areas of the valve seat plate.
REFERENCES:
patent: 6682045 (2004-01-01), Hashimoto
patent: 6769445 (2004-08-01), Hashimoto et al.
patent: 2001116152 (2001-04-01), None
Hara Tetsuhiko
Ozawa Shigeru
Nguyen Tuan
Reed Smith LLP
Sankyo Seiki Mfg. Co. Ltd.
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