Eugene Oddo DeceasedWood Dale, IL

4023592, May 17, 1977

Mar 17, 1976

5/667865

Robert C. Patzke - Prospect Heights IL
Thomas V. DeRyke - Libertyville IL
Stephen Ernohazy - Mount Prospect IL
Eugene P. Oddo - Mount Prospect IL

Addressograph Multigraph Corporation - Cleveland OH

F17D 113
B67D 300
F04B 1904
F04B 2302

137565

A self-priming pump is provided for metering a positive controlled amount of a volatile liquid to a utilization device. The pump comprises a piston means for pumping the liquid from a liquid supply container to a chamber, and from the chamber to a reservoir where the liquid is maintained at a uniform and constant level by an overflow port which drains any excess liquid back to the liquid supply container. The liquid remaining in the reservoir flows through an outlet passage to a well from which the liquid is dispensed in metered units under control of an adjustable needle valve. The needle valve is provided for controlling the rate of feed of the liquid to the utilization device, and is accessible for adjusting the liquid flow while the pump is in operation. The reservoir is also provided with vent means to prevent impediment of liquid flow and, also, to permit liquid flow immediately in response to initial start-up and operation of the pump.