Pumps – With signal – indicator – or inspection means
Patent
1976-03-15
1977-06-21
Vrablik, John J.
Pumps
With signal, indicator, or inspection means
417343, 417349, 417429, 417507, F04B 3500, F04B 2306, F04B 702, F04B 2102
Patent
active
040308600
ABSTRACT:
A fluid metering apparatus having paired cylinders, pistons and piston rods. The piston rods are connected to a lever or walking beam which, when pivoted at its center equidistant between the rod connections provides controlled equal travel distance and rate for the pistons providing equal cubic displacement in the cylinders. When the beam is pivoted off-center closer to one rod connection than to the other, the piston on the closer rod travels a shorter distance at a slower rate than the other piston providing unequal cubic displacement in the cylinders. In either case the quantities are measured proportionally to one another in the same period of time. The system is controlled by air cylinders and valves actuated by the reference piston rod. Telltale indicators are carried by the air cylinders to visually show any malfunction at each air cylinder individually. Automatic system operation is provided for continuous metering. Automatic system shut-down closes all valves at the material inlets and outlets sealing the resin, hardener, etc. in stable condition for resumption of metering.
REFERENCES:
patent: 1178686 (1916-04-01), Strasburger
patent: 2752989 (1956-07-01), Jenkins, Jr.
patent: 3672389 (1972-06-01), McConnell et al.
Sevald William T.
Vrablik John J.
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