US 4,398,589 A · Pumping and metering device for fluid metals using electromagnetic pump

Abstract

Pumping and measuring apparatus for fluid metals comprising an electromagnetic pump which operates in two modes; first, an idling mode in which the pump operates at one rate of flow and continually circulates fluid metal out of a reservoir, through an opening in a conduit and back to the reservoir; second, a delivery mode in which the pump operates at a higher rate of flow and circulates fluid as in the idling mode, and further raises the fluid metal to a higher opening in the conduit for delivery therethrough. A timing control for selectively adjusting the durations of each mode as well as the time intervals between modes allows high accuracy of measurements of quantities of fluid metal delivered.

Claims7

Dependent claims

Apparatus for delivering fluid metal to a casting machine comprising:

a reservoir for containing fluid metal and having an outlet;
electromagnetic pump means having an inlet and an outlet, with said inlet connected to the outlet of said reservoir;
and
a conduit connected to the outlet of said pump means and having
(a) a first outlet positioned at a first level and effective for returning metal to said reservoir whenever said pump means is operating above a first predetermined flow rate, and
(b) a second outlet positioned at a level above said first outlet and effective for directing metal to said casting machine only when said pump means is operating at a second predetermined flow rate higher than said first predetermined flow rate.

3 more elements

Dependencies are inferred from the claim text.

Pumping and metering device for fluid metals using electromagnetic pump

Life of this patent

Pumping and metering device for fluid metals using electromagnetic pump

Life of this patent

Abstract

Claims7