Fluid metering valve

Details Fluid metering valve Fluid metering valve

2006-03-28

2006-03-28

Bastianelli, John (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

C251S129190, C251S284000, C123S568240

Reexamination Certificate

active

07017884

ABSTRACT:
A fluid metering valve includes a gear rack which is slidable on a valve stem in which a spring counteracts the force of an actuator to maintain a constant load on the gear mechanism to prevent backlash. Corresponding stop mechanisms between the gear and the shaft of a rotary actuator come into engagement with each other near a fully closed position of the fluid metering valve for zero calibration purposes upon power loss to the actuator. A single valve member and a single actuator of the fluid metering valve provides for both a shut-off function and a metering function.

REFERENCES:
patent: 3557762 (1971-01-01), Mitchell
patent: 3981284 (1976-09-01), Gospodar
patent: 4318530 (1982-03-01), Lissmyr et al.
patent: 4549446 (1985-10-01), Beeson
patent: 5937835 (1999-08-01), Turner et al.
patent: 5941500 (1999-08-01), Lebkuchner
patent: 6102016 (2000-08-01), Sitar et al.
patent: 6382195 (2002-05-01), Green et al.

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