Valves and valve actuation – Lost motion between actuator and valve
Reexamination Certificate
2011-04-05
2011-04-05
Bastianelli, John (Department: 3753)
Valves and valve actuation
Lost motion between actuator and valve
C251S129110
Reexamination Certificate
active
07918435
ABSTRACT:
A combination gravimetric and volumetric fluid dispenser which includes a scale linked to a controller. The controller is linked to a plurality of two stage valves which control the dispensing of large quantities of base materials. The controller is also linked to a plurality of nutating pumps which together with the controller controls the dispensing of smaller quantities of additive materials. The base material dispensing valves include stepper motor actuators having multiple steps per revolution and are under the control of an analog signal from a controller. The base material dispensing valve is opened or closed via a rod that is slidably raised or lowered upon rotation of the drive shaft of the stepper motor actuator.
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Bastianelli John
Fluid Management, Inc.
Miller Matthias & Hull LLP
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