Dual lift system

Valves and valve actuation – Fluid actuated or retarded – Plural operations

Reexamination Certificate

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Details

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.

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