Valves and valve actuation – Fluid actuated or retarded – Plural operations
Reexamination Certificate
2005-12-27
2005-12-27
Yu, Justine R. (Department: 3751)
Valves and valve actuation
Fluid actuated or retarded
Plural operations
C251S160000, C251S172000, C251S188000, C251S192000, C137S311000
Reexamination Certificate
active
06978977
ABSTRACT:
Valve and valve lift system suitable for use in a regenerative thermal oxidizer, and oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. In a preferred embodiment, the valve is sealed with pressurized air during its stationary modes, and unsealed during movement to reduce valve wear.
REFERENCES:
patent: 1673018 (1928-06-01), Perdue
patent: 4192482 (1980-03-01), Goldman et al.
patent: 6669472 (2003-12-01), Cash et al.
patent: 6783111 (2004-08-01), Cash et al.
Cash James T.
Schmidt Glenn
Wendorf Ken
Bittman Mitchell D.
deVore Peter
Lemack Kevin S.
Megtec Systems Inc.
Yu Justine R.
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