Dispensing – Automatic control – Motor control
Patent
1978-08-23
1980-10-21
Skaggs, H. Grant
Dispensing
Automatic control
Motor control
222137, 222263, 222334, 222309, 137 99, 222145, B67D 508
Patent
active
042289246
ABSTRACT:
A machine is disclosed for repeatedly metering out quantities of a predetermined volume of fluid freshly mixed from a plurality of component sources. A mixing member (which may comprise simply a duct) is coupled to receive a plurality of component fluids through positive control valves. Reciprocating metering structures (cylinder-piston), connected to the valves, are driven in a controlled fashion by pressurized fluid and a reciprocating actuator. The control system incorporates sensors for detecting the positions of the metering structures as well as the valves to provide timely signals which change the valve positions and reverse the stroke. With the valves in one position, and upon movement of the actuator in one direction, fluid flows under pressure from a component source to an associated metering structure, then with the valves in another position, the actuator is reversed and the fluid is discharged from the metering structure to the mixing chamber. The valves are synchronously controlled by gear wheels which mesh with a common driver. As implemented, the control is by a pneumatic system.
REFERENCES:
patent: 2885119 (1959-05-01), Cartiol
patent: 2946488 (1960-07-01), Kraft
patent: 3341076 (1967-09-01), Wasilewski et al.
patent: 3776252 (1973-12-01), Wilcox
patent: 3814289 (1974-06-01), Robbins
patent: 3926345 (1975-12-01), Pulk et al.
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